Trane SAHL40, SAHL50, SAHL55, SAHL60, SAHL70 Installation, Operation And Maintenance Manual

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Page 1

Installation, Operation, and Maintenance

IntelliPak™

Commercial Rooftop Air Conditioners with CV, VAV, or SZVAV Controls

“A” and later Design Sequence

SAHL

SEHL, SFHL, SLHL, SSHL, SXHL

SXHK, SEHK, SFHK, SLHK, SSHK

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.

When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that

are attached to the equipment.

October 2013

*20, *25, *30, *40, *50, *55, *60, *70, *75

*20, *25, *30, *40, *50, *55, *60, *70, *75, *24, *29, *36, *48, *59, *73, *80, *89

*90, *11, *12, *13

SAFETY WARNING

RT-SVX36K-EN

Page 2

Warnings, Cautions and Notices

Warnings, Cautions and Notices. Note that

warnings, cautions and notices appear at appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potential hazards that could result in death or personal injury. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that could result in equipment or property-damage-only accidents.

Your personal safety and the proper operation of this

machine depend upon the strict observance of these precautions.

Read this manual thoroughly before operating or servicing this unit.

ATTENTION: Warnings, Cautions, and Notices appear at

appropriate sections throughout this literature. Read these carefully:

WARNING

CAUTIONs

NOTICE:

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.

Indicates a situation that could result in equipment or property-damage only accidents.

Important Environmental Concerns!

Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment.Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs such as HCFCs and HFCs.

Responsible Refrigerant Practices!

Trane believes that responsible refrigerant practices are

important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified.The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that

must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.

WARNING

Personal Protective Equipment (PPE) Required!

Installing/servicing this unit could result in exposure to electrical, mechanical and chemical hazards.

• Before installing/servicing this unit, technicians MUST put on all PersonalProtectiveEquipment (PPE) recommended for the work being undertaken.

ALWAYS refer to appropriate MSDS sheets and

OSHA guidelines for proper PPE.

• When working with or around hazardous chemicals,

ALWAYS refer to the appropriate MSDS sheets and

OSHA guidelines for information on allowable personal exposure levels, proper respiratory protection and handling recommendations.

• If there is a risk of arc or flash, technicians MUST put on all Personal Protective Equipment (PPE) in accordance with NFPA 70E or other country-specific requirements for arc flash protection, PRIOR to servicing the unit.

Failure to follow recommendations could result in death or serious injury.

WARNING

Risk of Roof Collapsing!

Confirm with a structural engineer that the roof structure is strong enough to support the combined weight of the roofcurb and the unit. Refer to “Unit

Dimensions & Weight Information,” p. 26 for typical

unit and curb weights. Failure to ensure proper structural roof support could cause the roof to collapse, which could result in death or serious injury and property damage.

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Warnings, Cautions and Notices

Unit Nameplate

One Mylar unit nameplate is located on the outside upper left corner of the control panel door. It includes the unit model number, serial number, electrical characteristics, weight, refrigerant charge, as well as to other pertinent unit data. A small metal nameplate with the Model Number, Serial Number, and Unit Weight is located just above the Mylar nameplate, and a third nameplate is located on the inside of the control panel door.

Compressor Nameplate

The Nameplate for the Scroll Compressor is located on the

compressor lower housing.

Max amps is listed on the nameplate and is the absolute highest amp load on the compressor at any operating condition (does not include locked rotor amps or inrush).

This value should never be exceeded.

WARNING

Fiberglass Wool!

Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance or repair will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation. You MUST wear all necessary Personal Protective Equipment (PPE) including gloves, eye protection, mask, long sleeves and pants when working with products containing fiberglass wool. Exposition to glass wool fibers without all necessary PPE equipment could result in cancer, respiratory, skin or eye irritation, which could result in death or serious injury.

Precautionary Measures

• Avoid breathing fiberglass dust.

• Use a NIOSH approved dust/mist respirator.

• Avoid contact with the skin or eyes.Wearlong-sleeved, loose-fitting clothing, gloves, and eye protection.

• Wash clothes separately from other clothing: rinse washer thoroughly.

• Operations such as sawing, blowing, tear-out, and spraying may generate fiber concentrations requiring additional respiratory protection. Use the appropriate NIOSH approved respiration in these situations.

First Aid Measures

Eye Contact - Flush eyes with water to remove dust. If symptoms persist, seek medical attention.

Skin Contact - Wash affected areas gently with soap and warm water after handling.

Revision Summary

RT-SVX36K-EN (04 Oct 2013)

• Added general information on “VZH Variable Speed

Compressors,” p. 18 and “High Compressor Pressure Differential Protection,” p. 17

• Updated Table 22, p. 59 (Compressor electrical service sizing data (20-130 ton)

• Updated Table 78, p. 175(Supply and Exhaust/Return fanVFD programming parameters), with addition of 006 (TR150 only) to Operation / Display Menu and 1-23 to Load and Motor Menu.

• Updated Supply Fan Performance Curve on Figure 66,

p. 109

• Updated Table 47, p. 118 for 50-59 ton data.

• Added information on “eFlex™ Compressor VFD

Programming Parameters,” p. 177

Overview of Manual

This booklet describes proper installation, start-up,

operation, and maintenance procedures for 20 through

130Ton rooftop air conditioners designed for Constant Volume (CV), Single Zone VAV (SZVAV), and Variable Air Volume (VAV) applications. By carefully reviewing the

information within this manual and following the

instructions, the risk of improper operation and/or

component damage will be minimized.

These units are equipped with electronic Unit Control

Modules (UCM) which provides operating functions that

are significantly different than conventional units. Refer to

the “Start-Up” and “Test Mode” procedures within this

Installation, Operation, & Maintenance manual and the

latest edition of the appropriate programming manual for

CV or VAV applications before attempting to operate or

service this equipment.

Note: The procedures discussed in this manual should

only be performed by qualified, experienced HVAC technicians.

Note: One copy of the appropriate service literature ships

inside the control panel of each unit.

It is important that periodic maintenance be performed to

help assure trouble free operation. Should equipment

failure occur, contact a qualified service organization with

qualified, experienced HVAC technicians to properly

diagnose and repair this equipment.

Unit Inspection

As soon as the unit arrives at the job site

• Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data).

• Verify that the power supply complies with the unit nameplate specifications.

• Verify that the power supply complies with the electric heater specifications on the unit nameplate.

• Visually inspect the exterior of the unit, including the roof, for signs of shipping damage.

• Check for material shortages. Refer to the Component Layout and Ship with Location illustration.

RT-SVX36K-EN 3

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Warnings, Cautions and Notices

• If the job site inspection of the unit reveals damage or material shortages, file a claim with the carrier immediately. Specify the type and extent of the damage on the “bill of lading” before signing.

• Visually inspect the internal components for shipping damage as soon as possible after delivery and before it is stored. Do not walk on the sheet metal base pans.

WARNING

No Step Surface!

Do not walk on the sheet metal drain pan. Walking on the drain pan could cause the supporting metal to collapse, resulting in the operator/technician to fall. Failure to follow this recommendation could result in death or serious injury.

• If concealed damage is discovered, notify the carrier's terminal of damage immediately by phone and by mail. Concealed damage must be reported within 15 days.

• Request an immediate joint inspection of the damage by the carrier and the consignee. Do not remove damaged material from the receiving location.Take photos of the damage, if possible.The owner must provide reasonable evidence that the damage did not occur after delivery.

• Remove the protective plastic coverings that shipped over the compressors.

Storage

Take precautions to prevent condensate from forming

inside the unit’s electrical compartments and motors if:

a. the unit is stored before it is installed; or,

b. the unit is set on the roof curb, and temporary heat

is provided in the building. Isolate all side panel service entrances and base pan openings (e.g., conduit holes, S/A and R/A openings, and flue openings) from the ambient air until the unit is ready for startup.

Note: Do not use the unit's heater for temporary heat

without first completing the startup procedure detailed under “Starting the Unit”.

Trane will not assume any responsibility for equipment

damage resulting from condensate accumulation on the unit's electrical and/or mechanical components.

On all IntelliPak I units, aTrane factory REQUIRED startup (mandatory with Evaporative Condensing or optionally selected ON OTHER UNITS) provides "maximized unit reliability and overall unit performance," in addition to preserving the standard factory warranty.

Additional Requirements for Units Requiring

Disassembly

When a new fully assembled IntelliPak is shipped and

received from ourTrane manufacturing location, and, for any reason, it requires disassembly or partial disassembly-which could include but is not limited to the evaporator, condenser, control panel, compressor/motor, factory mounted starter or any other components originally attachedto the fully assembled unit-compliance with the following is required to preserve the factory warranty:

• Trane, or an agent of Trane specifically authorized to perform start-up and warranty ofTrane® products, will perform or have direct on-site technical supervision of the disassembly and reassembly work.

• The installing contractor must notifyTrane-or an agent ofTrane specifically authorized to perform start-up and warranty ofTrane® products-two weeks in advance of the scheduled disassembly work to coordinate the disassembly and reassembly work.

• Start-up must be performed byTrane or an agent of

Trane specifically authorized to perform start-up and

warranty of Trane® products.

Trane, or an agent ofTrane specifically authorized to

perform startup and warranty of Trane® products, will provide qualified personnel and standard hand tools to perform the disassembly work at a location specified by the contractor.The contractor shall provide the rigging equipment such as chain falls, gantries, cranes, forklifts, etc. necessary for the disassembly and reassembly work and the required qualified personnel to operate the necessary rigging equipment.

Factory Warranty Information

Compliance with the following is required to preserve the factory warranty:

All Unit Installations

Startup MUST be performed by Trane, or an authorized agent ofTrane, to VALIDATE this WARRANTY. Contractor must provide a two-week startup notification toTrane (or an agent ofTrane specifically authorized to perform startup).

4 RT-SVX36K-EN

Page 5

Table of Contents

Warnings, Cautions and Notices .......... 2

Unit Nameplate ..................... 3

Compressor Nameplate ............... 3

Overview of Manual .................. 3

Unit Inspection ...................... 3

Storage ............................ 4

Factory Warranty Information .......... 4

Model Number Descriptions .............. 7

General Information .................... 11

Commonly Used Acronyms .......... 11

Unit Description .................... 11

Rooftop Module (RTM - 1U48 Standard on all

units) ............................. 11

Compressor Modules ................ 12

Human Interface Module ............. 12

Heat Module ....................... 12

Modulating Dehumidification Module MDM 12

Ventilation Override Module .......... 13

Variable Speed Module .............. 13

Interprocessor Communications Board . 13

LonTalk/BACnet Communication Interface

Module ........................... 13

Exhaust/Comparative Enthalpy Module . 13

Ventilation Control Module ........... 14

Generic Building Automation System Mod-

ule ............................... 14

Multipurpose Module ................ 15

Input Devices & System Functions ..... 15

Constant Volume (CV), Single Zone Variable Air Volume (SZVAV) & Variable Air Volume (VAV) Sensors and Controls

............ 15

Constant Volume (CV) Units ........... 19

Single Zone Variable Air Volume (SZVAV) Only

................................ 19

Variable Air Volume (VAV) Units ........ 20

Space Temperature Averaging ........ 22

Installation ............................. 26

Unit Clearances ...................... 26

Trane Roof Curb and Ductwork ........ 36

Pitch Pocket Location .................37

If a Trane Curb Accessory Kit is Not Used: 37

Unit Rigging & Placement .............38

General Unit Requirements ............40

Main Electrical Power Requirements ....40

Field Installed Control Wiring ..........40

Requirements for Electric Heat Units ....40

Requirements for Gas Heat (SFH_) ......40

Requirements for Hot Water Heat (SLH_) 40

Requirements for Steam Heat (SSH_) . . .41

O/A Pressure Sensor and Tubing Installation (All units with Statitrac or Return Fans) . .41

Requirements for Modulating Reheat Dehu-

midification (S_HL) ...................41

Condensate Drain Connections ........41

Units with Gas Furnace ...............42

Removing Supply and Exhaust/Return Fan

Shipping Channels (Motors >5Hp) ......42

Optional DDP Supply Fan Shipping Channel Removal and Isolator Spring Adjustment 42

O/A Sensor & Tubing Installation .......45

Evaporative Condenser Make-up Water and

Drain Line Installation ................45

Gas Heat Units (SFH_) ................48

Flue Assembly Installation ............51

Hot Water Heat Units (SLH_) ...........51

Steam Heat Units (SSH_) ..............52

...................................54

Disconnect Switch External Handle .....55

Electric Heat Units (SEH_) .............55

Main Unit Power Wiring ..............56

Power Wire Sizing and Protection Device

Equations ..........................62

Field Installed Control Wiring ..........63

Controls Using 24 VAC ...............64

Controls using DC Analog Input/Outputs .64

Constant Volume System Controls ......64

Variable Air Volume and Constant Volume

System Controls .....................64

Unit Replacement .......................77

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Table of Contents

Precautionary Measures ............. 77

First Aid Measures .................. 77

Electrical Connection .................. 77

Requirements for Gas Heat ........... 78

Requirements for Hot Water Heat (SLH*) 78

Requirements for Steam Heat (SSH*) . . 78

Space Pressure Sensor and Tubing Installa-

tion (All units with Statitrac) .......... 78

Condensate Drain Connections ........ 78

Supply and Return Duct Connections . . . 79

Lifting procedures .................... 79

Unit Rigging & Placement ............ 79

Installation Checklist .................... 84

20-130 Ton, Air-Cooled and Evaporative Con-

densing ........................... 84

Unit Start Up ........................... 86

Cooling Sequence of Operation ....... 86

Gas Heating Sequence of Operation . . . 91

Modulating Gas Sequence of Operation—Full and Limited Modulating Gas Furnace . . 92

Electric Heat Sequence of Operation . . . 93

Wet Heat Sequence of Operation ...... 93

Voltage Supply and Voltage Imbalance . 95

Verifying Proper Fan Rotation ........ 101

Direct-Drive Supply Fan Speed Adjustment 101

System Airflow Measurements ....... 102

VAV Systems with DDP Supply Fan . . . 104

Exhaust Airflow Measurement (Optional with

all Units) ......................... 104

Traq Sensor Airflow Measurement (Optional with all units equipped with an economizer) 105

Return Plenum Pressure Control (Units

equipped with Return Fan) .......... 105

Economizer Damper Adjustment ..... 125

Compressor Start-Up (All Systems) . . . 127

Compressor Operational Sounds ..... 129

Evaporative Condenser Startup ...... 130

Pressure Curves ................... 131

Thermostatic Expansion Valves ...... 147

Charging by Subcooling .............148

Low Ambient Dampers ..............148

Gas Furnace Start-Up (Constant Volume &

Variable Air Volume Systems) ........150

Two Stage Gas Furnace ..............150

Full Modulating Gas Furnace .........152

Limited Modulating Gas Furnace ......153

Final Unit Checkout .................154

Startup Checklists ......................155

20-75 Ton — Air-Cooled .............155

24-89 Ton — Evaporative Condenser . . .157

90-130 Ton — Air Cooled .............161

Maintenance ...........................165

Fan Belt Adjustment ................171

Scroll Compressor Replacement ......172

Scroll Compressor Replacements .....173

Monthly Maintenance ...............178

Coil Cleaning ......................179

Fall Restraint .......................182

Final Process .......................182

Unit Wiring Diagram Numbers ...........184

Warranty ..............................187

Commercial Equipment Rated 20 Tons and

Larger and Related Accessories .......187

Factory Warranty Information .........187

Index ..................................188

6 RT-SVX36K-EN

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Model Number Descriptions

S A H L * 5 0 4 0 A 6 8 A 6 B D 8 0 0 1 0 0 W 0 0 G 0 B 0 0 0 R 0 0 0 8 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

DIGIT 1 - UNIT TYPE

S = Self-Contained (Packaged Rooftop)

DIGIT 2 - UNIT FUNCTION

A = DX Cooling, No Heat E = DX Cooling, Electric Heat F = DX Cooling, Natural Gas Heat L = DX Cooling, Hot Water Heat S = DX Cooling, Steam Heat X = DX Cooling, No Heat, Extended Casing

DIGIT 3 - UNIT AIRFLOW

H = Single Zone

DIGIT 4 - DEVELOPMENT SEQUENCE

L = Sixth

DIGITS 5,6,7 - NOMINAL CAPACITY

*20 = 20 Tons Air-Cooled *25 = 25 Tons Air-Cooled *30 = 30 Tons Air-Cooled *40 = 40 Tons Air-Cooled *50 = 50 Tons Air-Cooled *55 = 55 Tons Air-Cooled *60 = 60 Tons Air-Cooled *70 = 70 Tons Air-Cooled *75 = 75 Tons Air-Cooled *24 = 24 Tons Evap Condenser *29 = 29 Tons Evap Condenser *36 = 36 Tons Evap Condenser *48 = 48 Tons Evap Condenser *59 = 59 Tons Evap Condenser *73 = 73 Tons Evap Condenser *80 = 80 Tons Evap Condenser *89 = 89 Tons Evap Condenser

DIGIT8-POWERSUPPLY (See Notes)

4 = 460/60/3 XL E = 200/60/3 XL 5 = 575/60/3 XL F = 230/60/3 XL

Note: SEHL units (units with electric

heat) utilizing 208V or 230V require dual power source.

DIGIT 9 - HEATING CAPACITY

Note: When the second digit calls for "F"

(Gas Heat), the following values apply: (please note G and M are available ONLY on 50 ton models and above.

G = Low Heat-Limited Modulation H = High Heat-2-Stage J = High Heat-Limited L = Low Heat-2-Stage M = Low Heat- Full Modulation

0 = No Heat p = High Heat-Full Modulation

Note: When the second digit calls for "E"

(electric heat), the following values apply:

D = 30 kW R = 130 kW H = 50 kW U = 150 kW L = 70 kW V = 170 kW N = 90 kW W = 190 kW Q = 110 kW

Note: When the second digit calls for ''L''

(Hot Water) or ''S''(Steam) Heat, one of the following valve size values must be in Digit 9:

High Heat Coil:

1 = .50" 2 = .75" 3 = 1" 4 = 1.25" 5 = 1.5" 6 = 2"

Low Heat Coil:

A = .50" B = .75" C = 1" D = 1.25" E = 1.5" F = 2"

DIGIT 10 - DESIGN SEQUENCE

A = First (Factory Assigned)

Note: Sequence may be any letter A thru

Z, or any digit 1 thru 9.

DIGIT 11 - EXHAUST/RETURN OPTION

0 = None 1 = Barometric 3 = 100% Exhaust 3 HP w/Statitrac 4 = 100% Exhaust 5 HP w/Statitrac 5 = 100% Exhaust 7.5 HP w/Statitrac 6 = 100% Exhaust 10 HP w/Statitrac 7 = 100% Exhaust 15 HP w/Statitrac 8 = 100% Exhaust 20 HP w/Statitrac B = 50% Exhaust 3 HP C = 50% Exhaust 5 HP D = 50% Exhaust 7.5 HP F = 100% Exhaust 3 HP w/o Statitrac

(CV Only)

G = 100% Exhaust 5 HP w/o Statitrac

(CV Only)

H = 100% Exhaust 7.5 HP w/o Statitrac

(CV Only)

J = 100% Exhaust 10 HP w/o Statitrac

(CV Only)

K = 100% Exhaust 15 HP w/o Statitrac

(CV Only)

L = 100% Exhaust 20 HP w/o Statitrac

(CV Only) 9 = 100% Return 3 HP w/Statitrac M = 100% Return 5 HP w/Statitrac N = 100% Return 7.5 HP w/Statitrac

P = 100% Return 10 HP w/Statitrac R = 100% Return 15 HP w/Statitrac

T = 100% Return 20 HP w/Statitrac

U = 100% Return 3 HP w/o Statitrac

(CV Only)

V = 100% Return 5 HP w/o Statitrac

(CV Only)

W = 100% Return 7.5 HP w/o Statitrac

(CV Only)

X = 100% Return 10 HP w/o Statitrac

(CV Only)

Y = 100% Return 15 HP w/o Statitrac

(CV Only)

Z = 100% Return 20 HP w/o Statitrac

(CV Only)

DIGIT 12 - EXHAUST/RETURN

AIR FAN DRIVE

(Exhaust/Return Fan) 0 = None 8 = 800 RPM 4 = 400 RPM 9 = 900 RPM 5 = 500 RPM A = 1000 RPM 6 = 600 RPM B = 1100 RPM 7 = 700 RPM (Return Fan only) C = 1200 RPM H = 1700 RPM D = 1300 RPM J = 1800 RPM E = 1400 RPM K = 1900 RPM F = 1500 RPM G = 1600 RPM

DIGIT 13 - FILTER (PRE DX/FINAL)

A=Throwaway B

Cleanable Wire Mesh

High-EfficiencyThrowaway

Bag With Prefilter

Cartridge with Prefilter

Throwaway Filter Rack (Filter Not

Included) Bag Filter Rack (Filter Not Included)

StandardThrowaway Filter/

Cartridge Final Filters High EfficiencyThrowaway Filter/

Cartridge Final Filters

Bag Filters with 2"Throwaway

Prefilters/Cartridge Final Filters

Cartridge Filters with 2"Throwaway

Prefilters /Cartridge Final Filters

= StandardThrowaway Filter

/Cartridge Final Filters with 2"Throwaway Prefilters

= High EfficiencyThrowaway Filters/

Cartridge Final Filters with 2"Throwaway Prefilters

= Bag Filters with Prefilters /Cartridge

Final Filters with 2"Throwaway Prefilters

= Cartridge Filters with Prefilters/

Cartridge Final Filters with 2"Throwaway Prefilters

RT-SVX36K-EN 7

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Model Number Descriptions

DIGIT 14 - SUPPLY AIR FAN HP

1 = 3 HP FC 2 = 5 HP FC 3 = 7.5 HP FC 4 = 10 HP FC 5 = 15 HP FC 6 = 20 HP FC 7 = 25 HP FC 8 = 30 HP FC 9 = 40 HP FC A = 50 HP FC B = 3 HP DDP 80W C = 3 HP DDP 120W D = 5 HP DDP 80W E = 5 HP DDP 120W F = 7.5 HP DDP 80W G = 7.5 HP DDP 120W H = 10 HP DDP 80W (60-89T = 2 x 5 HP) J = 10 HP DDP 120W (60-89T = 2 x 5 HP) K = 15 HP DDP 80W (60-89T = 2 x 7.5 HP) L = 15 HP DDP 120W (60-89T = 2 x 7.5 HP) M = 20 HP DDP 80W (60-89T = 2 x 10 HP) N = 20 HP DDP 120W (60-89T = 2 x 10 HP) P = 25 HP DDP 80W R = 25 HP DDP 120W T = 30 HP DDP 80W (60-89T = 2 x 15 HP) U = 30 HP DDP 120W (60-89T = 2 x 15 HP) V = 40 HP DDP 80W(60-89T = 2 x 20 HP) W = 40 HP DDP 120W (60-89T = 2 x 20 HP)

50 HP DDP 80W(70 & 75-89T = 2 x 25

HP) 50 HP DDP 120W (70 & 75-89T = 2 x 25

HP)

Z = 30 HP DDP 100W

(a)50, 55T only

(a)

DIGIT 15 - SUPPLY AIR FAN RPM

4=400 RPM F = 1500 RPM 5=

500 RPM G = 1600 RPM

6 = 600 RPM H = 1700 RPM 7 = 700 RPM J = 1800 RPM 8 = 800 RPM K = 1900 RPM 9 = 900 RPM L = 2000 RPM A = 1000 RPM M = 2100 RPM B = 1100 RPM N = 2200 RPM C = 1200 RPM P = 2300 RPM D = 1300 RPM R = 2400 RPM E = 1400 RPM

DIGIT 16 - OUTSIDE AIR

A = No Fresh Air B = 0-25% Manual D = 0-100% Economizer E = 0-100% Economizer w/ TRAQ/DCV

Note: Must install CO2sensor(s) for DCV

to function properly

DIGIT 17 - SYSTEM CONTROL

1 = CV - Zone Temp Control 2 = CV - Discharge Temp Control 4 = CV - Zone Temp Control

Space Pressure Control w/ Exhaust/ Return VFD w/o Bypass

5 = CV - Zone Temp Control

Space Pressure Control w/ Exhaust/Return VFD and Bypass

6 = VAV Discharge Temp Control w/ VFD

w/o Bypass

7 = VAV Discharge Temp Control w/ VFD

and Bypass

8 = VAV Discharge Temp Control

Supply and Exhaust/Return Fan w/ VFD w/o Bypass

9 = VAV Discharge Temp Control

Supply and Exhaust/Return Fan with VFD and Bypass

A = VAV - Single Zone VAV - w/ VFD

w/o Bypass

B = VAV - Single Zone VAV - w/ VFD

and Bypass

C = VAV - Single Zone VAV - Supply and

Exhaust/Return Fan w/ VFD w/o Bypass

D = VAV - Single Zone VAV - Supply and

Exhaust/Return Fan w/ VFD w/ Bypass

DIGIT 18 - ZONE SENSOR

0 = None A = Dual Setpoint Manual or Auto

Changeover (BAYSENS108*)

B = Dual Setpoint Manual or Auto

Changeover w/ System Function Lights (BAYSENS110*)

C = Room Sensor w/ Override and

Cancel Buttons (BAYSENS073*)

D = Room Sensor w/ Temperature

Adjustment and Override and Cancel Buttons (BAYSENS074*)

L = Programmable Zone Sensor w/

System Function Lights for CV, SZVAV, and VAV (BAYSENS119*)

Note: *Asterisk indicates current model

number digit A, B, C, etc.These sensors can be ordered to ship with the unit.

DIGIT 19 - AMBIENT CONTROL

0=Standard 1=0° Fahrenheit

DIGIT 20 - AGENCY APPROVAL

0=None (cULus Gas Heater, see note) 1=cULus

Note: Includes cULus classified gas

heating section only when second digit of Model No. is a "F."

DIGITS 21 - 38 MISCELLANEOUS

21 A = Unit Disconnect Switch 22 B = Hot Gas Bypass

Hot Gas Reheat w/out Hot Gas Bypass

Hot Gas Reheat and Hot Gas

23 0 = Without Economizer

Z = Economizer Control w/ W = Economizer Control w/Dry Bulb

24 E = Low Leak Fresh Air Dampers 25 F = High Duct Temperature

26 G = High Capacity Unit

Bypass

C = Economizer Control w/

Comparative Enthalpy

Reference Enthalpy

Thermostat

H = High Efficiency Unit

V = eFlex Variable Speed Compressor

27 0 =

28 B = GBAS 0-10V

29 A =

30 M = Remote Human Interface 31 N = Ventilation Override Module 32 0 = None R = Extended Grease Lines

33 0 = Standard Panels

34 V = Inter-Processor 35 M =

7 = Trane LonTalk Communication 36 8 = Spring Isolators

37 6 = Factory-Powered 15A GFI

38 A = Supply Fan Piezometer

Tip: EXAMPLE

Air-Cooled Aluminum Condenser Coil

Corrosion Protected Condenser

Coil A = Evap Condenser B = Evap Condenser w/ Sump Heater C=

Evap Condenser w/ Dolphin

WaterCare System D=

Evap Condenser w/ Sump Heater

and Dolphin WaterCare System E=

Evap Condenser w/ Conductivity

Controller F=

Evap Condenser w/ Conductivity

Controller and Sump Heater

K = GBAS 0-5V R = Rapid Restart

Motors w/ Internal Shaft

Grounding

1 = Differential Pressure Gauge 2=

Extended Grease Lines and

Differential Pressure Gauge

T = Access Doors U = IRU - w/ Std Panels W = IRU - w/ Access Doors Y = IRU w/SST - w/ Std Panels Z = IRU w/SST - w/ Access Doors

Communication Bridge

BACnet Communication Interface

(BCI) Module Y = Trane Communication Interface

(TCI) Module

Interface (LCI) Module

Convenience Outlet/Disconnect

Switch J = Temperature Sensor

Model numbers: SAHL*5040A68A6BD800100W00G0 B000R0 00800 describes a unit with the following characteristics:

DX Cooling Only unit w/ no extended casing, 50 ton nominal cooling capacity, 460/60/3 power supply,100 percent exhaust with Statitrac, 10 HP exhaust fan motor with drive selection No. 8 (80 0 RPM), throwaway filters, 20 HP supply fan motor with drive selection No. B (1100 RPM), 0-100% economizer w/ dry bulb control, supply and exhaust

VFD w/o bypass, no remote panel,

standard ambient control, cULus agency approval. High capacity unit, extended grease lines and spring isolators.

The service digit for each model

number contains 38 digits; all 38 digits must be referenced.

8 RT-SVX36K-EN

Page 9

Model Number Descriptions

S X H K * 1 1 4 0 A H 8 C E C D 8 0 0 1 * * Z * * * * * * * * * * * * * * * 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

DIGIT 1 - UNIT TYPE

S = Self-Contained (Packaged Rooftop)

DIGIT 2 - UNIT FUNCTION

E = DX Cooling, Electric Heat F = DX Cooling, Natural Gas Heat L = DX Cooling, Hot Water Heat S = DX Cooling, Steam Heat X = DX Cooling, No Heat, Extended

Casing

DIGIT 3 - UNIT AIRFLOW

H = Single Zone

DIGIT 4 - DEVELOPMENT SEQUENCE

K = R-410A Development Sequence

DIGITS 5,6,7 - NOMINAL CAPACITY

*90 = 90 Tons Air-Cooled *11 = 105Tons Air-Cooled *12 = 115Tons Air-Cooled *13 = 130Tons Air-Cooled

DIGIT8-POWERSUPPLY (See Notes)

4 = 460/60/3 XL 5 = 575/60/3 XL

DIGIT 9 - HEATING CAPACITY

0 = No Heat H = High Heat - 2-Stage J = High Heat - Limited Modulation P = High Heat - Full Modulation

Note:When the second digit calls for “E”

(electric heat), the following values apply in the ninth digit:

W= 190kW

Note: When the second digit calls for ''L''

(Hot Water) or ''S''(Steam) Heat, one of the following valve size values must be in Digit 9:

High Heat Coil:3=1",4=1.25",5=1.5", 6 = 2", 7 = 2.5”. Low Heat Coil:C=1",D=1.25",E=1.5", F = 2", G = 2.5”.

DIGIT 10 - DESIGN SEQUENCE

A = First (Factory Assigned)

Note: Sequence may be any letter A thru

Z, or any digit 1 thru 9.

DIGIT 11 - EXHAUST OPTION

0 = None 7 = 100% Exhaust 15 HP w/Statitrac 8 = 100% Exhaust 20 HP w/Statitrac 9 = 100% Exhaust 25 HP w/Statitrac F = 50% Exhaust 15 HP H = 100% Exhaust 30 HP w/ Statitrac J = 100% Exhaust 40 HP w/ Statitrac K = 100% Exhaust 15 HP w/o Statitrac

(CV Only)

L = 100% Exhaust 20 HP w/o Statitrac

(CV Only)

M = 100% Exhaust 25 HP w/o Statitrac

(CV Only)

N = 100% Exhaust 30 HP w/o Statitrac

(CV Only)

P = 100% Exhaust 40 HP w/o Statitrac

(CV Only)

DIGIT 12 - EXHAUST AIR FAN DRIVE

(Exhaust Fan) 0 = None 5 = 500 RPM 6 = 600 RPM 7 = 700 RPM 8 = 800 RPM

DIGIT 13 - FILTER (PRE DX/ FINAL)

A = Throwaway C = High-EfficiencyThrowaway D = Bag With Prefilter E = Cartridge with Prefilter F = Throwaway Filter Rack (Filter Not

Included) G = Bag Filter Rack (Filter Not Included) H = StandardThrowaway Filter/

Cartridge Final Filters J = High EfficiencyThrowaway Filter/

Cartridge Final Filters K = Bag Filters with 2"Throwaway

Prefilters/Cartridge Final Filters L = Cartridge Filters with 2"Throwaway

Prefilters /Cartridge Final Filters M= StandardThrowaway Filter

/Cartridge Final Filters with

2"Throwaway Prefilters N = High EfficiencyThrowaway Filters/

Cartridge Final Filters with

2"Throwaway Prefilters P = Bag Filters with Prefilters /Cartridge

Final Filters with 2"Throwaway

Prefilters Q = Cartridge Filters with Prefilters/

Cartridge Final Filters with

2"Throwaway Prefilters

DIGIT 14 - SUPPLY AIR FAN HP

C = 30 HP (2-15 HP) D = 40 HP (2-20 HP) E = 50 HP (2-25 HP) F = 60 HP (2-30 HP) G = 80 HP (2-40 HP)

DIGIT 15 - SUPPLY AIR FAN DRIVE

A = 1000 RPM

B = 1100 RPM C = 1200 RPM D = 1300 RPM E = 1400 RPM F = 1500 RPM G = 1600 RPM

DIGIT 16 - OUTSIDE AIR

D = 0-100% Economizer (Std.) E = 0-100% Economizer w/ TRAQ w/ DCV

Note: Must install CO2sensor(s) for DCV

to function properly

DIGIT 17 - SYSTEM CONTROL

1 = CV - Zone Temperature Control 2 = CV - DischargeTemperature Control 4 = CV - Zone Temperature Control

Space Pressure Control w/ Exhaust VFD w/o Bypass

5 = CV - Zone Temperature Control

Space Pressure Control w/ Exhaust VFD and Bypass

6 = VAV DischargeTemperature Control

w/ VFD w/o Bypass

7 = VAV DischargeTemperature Control

w/ VFD and Bypass

8 = VAV DischargeTemperature Control

Supply and Exhaust Fan w/ VFD w/o Bypass

9 = VAV DischargeTemperature Control

Supply and Exhaust Fan w/ VFD and Bypass

A = VAV – Single Zone VAV – w/ VFD

w/o Bypass

B = VAV – Single Zone VAV – w/ VFD

w/ Bypass

C = VAV – Single Zone VAV – Supply and

Exhaust/Return Fan w/ VFD w/o Bypass

D = VAV – Single Zone VAV – Supply and

Exhaust/Return Fan w/ VFD w/ Bypass

RT-SVX36K-EN 9

Page 10

Model Number Descriptions

DIGIT 18 - ZONE SENSOR

0 = None A = Dual Setpoint Manual or Auto

Changeover (BAYSENS108*)

B = Dual Setpoint Manual or Auto

Changeover w/ System Function Lights (BAYSENS110*)

C = Room Sensor w/ Override and

Cancel Buttons (BAYSENS073*)

D = Room Sensor w/Temperature

Adjustment and Override and Cancel Buttons (BAYSENS074*)

L = Programmable Zone Sensor w/

System Function Lights for both CV and VAV (BAYSENS119*)

Note: *Asterisk indicates current model

number digit A, B, C, etc.These sensors can be ordered to ship with the unit.

DIGIT 19 - AMBIENT CONTROL

0 = Standard

DIGIT 20 - AGENCY APPROVAL

0 = None (cULus Gas Heater, see note) 1 = cULus

Note: Includes cULus classified gas

heating section only when second digit of Model No. is a "F."

DIGITS 21 - 38 MISCELLANEOUS

21 A = Unit Disconnect Switch 22 B = Hot Gas Bypass 23 C = Economizer Control w/

23 Z = Economizer Control w/

23 W = Economizer Control w/Dry Bulb 24 E = Low Leak Outside Air Dampers 25 F = High Duct Temperature

26 G = High Capacity Evap. Coil

27 0 = Air-Cooled Aluminum

28 K = Generic B.A.S Module

29 A = Motors w/ Internal Shaft

30 M = Remote Human Interface 31 N = Ventilation Override Module

32 0 = None R = Extended Grease Lines

33 0 = Standard Panels

34 V = Inter-Processor

35 Y = Trane Communication Interface

37 6 = Factory-Powered 15A GFI

Comparative Enthalpy

Reference Enthalpy

Thermostat

(105Ton)

H = High Cap. Evap. Coil and High

Eff. Cond. Coil (90 Ton)

Condenser Coil

J = Corrosion-Protected

Condenser Coil

R = Rapid Restart

Grounding

1 = Differential Pressure Gauge 2=

Extended Grease Lines and Differential Pressure Gauge

T = Access Doors U = IRU - w/ Std Panels W = IRU - w/ Access Doors Y = IRU w/SST - w/ Std Panels

Communication Bridge

(TCI) Module

M = BACnet Communication

Interface (BCI) Module

7 = Trane LonTalk Communication

Interface (LCI) Module

Convenience Outlet

Tip: EXAMPLE

Model numbers: SXHK*1140AH8CECD8001**Z describes a unit with the following characteristics:

DX cooling with extended casing, no heat, 105 ton nominal cooling capacity, 460/60/3 power supply, 100 percent exhaust with Statitrac, 30 h.p. exhaust fan motor with drive selection No. 8 - (800 RPM), high-efficiency throwaway filters, 50 hp supply fan motor with 1200 RPM, economizer, w/ reference enthalpy control, Supply and Exhaust with VFD but no bypass, cULus agency approval.

The service digit for each model

number contains 36 digits; all 36 digits must be referenced.

10 RT-SVX36K-EN

Page 11

General Information

Commonly Used Acronyms

For convenience, a number of acronyms and abbreviations are used throughout this manual.These acronyms are alphabetically listed and defined below.

• AC = Air Cooled Condenser • MDM = Modulating Dehumidification Module

• BAS = Building automation systems • MPM = Multipurpose module

• BCI = BACnet Communication Interface module • MWU = Morning warm-up

• CFM = Cubic-feet-per-minute • NSB = Night setback

• CKT. = Circuit • O/A = Outside air

• CLV = Cooling valve (reheat only) • psig = Pounds-per-square-inch, gauge pressure

• CV = Constant volume • PTFE = Polytetrafluoroethylene (Teflon®)

• CW = Clockwise • R/A = Return air

• CCW = Counterclockwise • RAH = Return air humidity

• DDP = Direct-drive plenum • RH = Right-hand

• E/A = Exhaust air • RHP = Reheat pumpout solenoid valve

• EC = Evaporative Condenser • RHV = Reheat valve

• ECEM = Exhaust/comparative enthalpy module • RPM = Revolutions-per-minute

• F/A = Fresh air • RT = Rooftop unit

• FC = Forward-curved • RTM = Rooftop module

• GBAS = Generic building automation system • S/A = Supply air

• HGBP = Hot gas bypass • SCM = Single circuit module

• HGRH = Hot gas reheat • SZ = Single-zone (unit airflow)

• HI = Human Interface • SZVAV = Single zone variable air volume

• HVAC = Heating, ventilation and air conditioning • TCI = Tracer communications module

• HPC = High pressure cutout • UCM = Unit control modules

• I/O = Inputs/outputs • VAV = Variable air volume

• IOM = Installation/operation/ maintenance manual • VCM = Ventilation control module

• IPC = Interprocessor communications • VFD = Variable frequency drive (inverter)

• IPCB = Interprocessor communications bridge • VOM = Ventilation override module

• IRU = Intellipak replacement unit • VSC = Variable speed compressor

• LCI-I = LonTalk Communication Interface for IntelliPak • VSD = eFlex™variable speed drive compressor

• LH = Left-hand • VSM = Variable speed module

• MCHE = Microchannel Coil • w.c. = Water column

• LPC = Low pressure cutout • WCI = Wireless Communication Interface

• MCM = Multiple circuit module

Unit Description

EachTrane commercial, single-zone rooftop air conditioner ships fully assembled and charged with the proper refrigerant quantity from the factory.

An optional roof curb, specifically designed for the S_HL units is available fromTrane.The roof curb kit must be field assembled and installed according to the latest edition of the curb installation guide.

Trane Commercial Rooftop Units are controlled by a

microelectronic control system that consists of a network of modules and are referred to as Unit Control Modules (UCM).The acronym UCM is used extensively throughout this document when referring to the control system network.

These modules through Proportional/Integral control

algorithms perform specific unit functions which provide the best possible comfort level for the customer.

RT-SVX36K-EN 11

They are mounted in the control panel and are factory

wired to their respective internal components.They receive and interpret information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request for economizing, mechanical cooling, heating, and ventilation. Refer to the following discussion for an explanation of each module function.

Rooftop Module (RTM - 1U48 Standard on all units)

The Rooftop Module (RTM) responds to cooling, heating,

and ventilation requests by energizing the proper unit components based on information received from other unit modules, sensors, remote panels, and customer supplied binary inputs. It initiates supply fan, exhaust fan, exhaust damper, return fan, return damper, variable frequency drive output, and economizer operation based on that information.

Page 12

General Information

Table 1. RTM Resistance Input vs. Setpoint Temperatures

RTM cooling or heating

setpoint input used

as the source for

a ZONE temp setpoint (°F)

40 40 1084 45 45 992 50 50 899 55 55 796 60 60 695 65 65 597 70 70 500 75 75 403

80 80 305 n/a 85 208 n/a 90 111

RTM cooling setpoint input

used as the source

for SUPPLY AIR temp

setpoint cooling (°F)

Table 2. RTM Resistance Value vs. System Operating Mode

Resistance applied to RTM MODE

input Terminals (Ohms)

Max. Tolerance 5%

2320 Auto Off 4870 Auto Cool

7680 Auto Auto 10770 On Off 13320 On Cool 16130 On Auto 19480 Auto Heat 27930 On Heat

Constant Volume/SZVAV Units

Fan Mode System Mode

Resistance (Ohms) Max.

Tolerance 5%

Compressor Modules

(SCM & MCM - 1U49 standard on all units)

The compressor modules, (Single Circuit & Multiple

Circuit), upon receiving a request for mechanical cooling, energizes the appropriate compressors and condenser

Heat Module

(1U50 used on heating units)

The Heat module, upon receiving a request for Heating,

energizes the appropriate heating stages or strokes the

Modulating Heating valve as required. fans. It monitors the compressor operation through feedback information it receives from various protection devices.

Human Interface Module

(HI - 1U65 standard on all units)

The Human Interface module enables the operator to

adjust the operating parameters for the unit using it's 16 key keypad. The 2 line, 40 character LCD screen provides status information for the various unit functions as well as menus for the operator to set or modify the operating parameters.

12 RT-SVX36K-EN

Modulating Dehumidification Module

MDM

(Optional 1U107 - used with Dehumidification

Control)

The MDM supports specific control inputs and outputs for

Modulating Dehumidification control including

Modulating Reheat and Cooling valve control as well as

the Reheat Pumpout Relay output.The Modulating

Dehumidification control Algorithm provides control

requests to the MDM to accomplish proper

Dehumidification control.

Page 13

General Information

Ventilation Override Module

(VOM - Optional 1U51)

Important: The ventilation override system should not

be used to signal the presence of smoke caused by a fire as it is not intended nor designed to do so.

The Ventilation Override module initiates specified

functions such as; space pressurization, exhaust, purge, purge with duct pressure control, and unit off when any one of the five (5) binary inputs to the module are activated.The compressors and condenser fans are disabled during the ventilation operation. If more than one ventilation sequence is activated, the one with the highest priority is initiated.

Variable Speed Module

(VSM - Optional 1U123)

The Variable Speed module used in eFlex variable speed

units provides a 0-10VDC output analog speed signal to control the compressor VFD. Table 3 lists VSM output signal (VDC) and corresponding compressor speed (RPM) at 0%, 50% and 100% Intellipak command speeds (Spd %):

Table 3. VSM output signal (VDC)

Variable speed unit

40T 0 1500 4.7 3632 9.5 5762 50T 0 1500 3.9 3271 7.9 5042 55T 0 1500 3.9 3271 7.9 5042 60T 0 1500 4.8 3660 9.6 5820 70T 0 1500 4.8 3660 9.6 5820

Note: voltages and speed +/- 1%

During Auto Run mode, the Intellipak command speed (Spd %) can be monitored at the HI.The 0-10VDC signal and compressor RPM is displayed on theTRV200 inverter keypad (1U128).

Figure 1. Display -TRV200 inverter keypad (1U128)

Spd 0% Spd 50% Spd 100%

VDC RPM VDC RPM VDC RPM

against Table 3. VSM output signal voltage is measured

between terminals 53 and 55 at the VFD (3U119) input.

Figure 2. VSM output signal

Interprocessor Communications Board

(IPCB - Optional 1U55 used with the Optional

Remote Human Interface)

The Interprocessor Communication Board expands

communications from the rooftop unit UCM network to a

Remote Human Interface Panel. DIP switch settings on the

IPCB module for this application should be; Switches 1 and

2“Off”, Switch 3 “On”.

LonTalk/BACnet Communication Interface

Module

(LCI/BCI - Optional 1U54/1U104 - used on

units with Trane ICS™ or 3rd party Building

Automation Systems)

The LonTalk or BACnet Communication Interface modules

expand communications from the unit UCM network to a

TraneTracer Summit or a 3rd party building automation

system and allow external setpoint and configuration

adjustment and monitoring of status and diagnostics.

Exhaust/Comparative Enthalpy Module

(ECEM - Optional 1U52 used on units with

Statitrac and/or comparative enthalpy

options)

The Exhaust/Comparative Enthalpy module receives

information from the return air humidity sensor, the

outside air humidity sensor,and the return air temperature

sensor to utilize the lowest possible humidity level when

considering economizer operation. In addition, it receives

space pressure information which is used to maintain the

space pressure to within the setpoint control band. Refer

to Figure 4, p. 14 for the Humidity vs. Current input values.

0-10VDC signal

TheVSM output signal can also be checked in ServiceTest

mode. Compressor relays should be commanded off as shown in Figure 2, and the Spd% command can be changed at the HI. Then check the VSM output signal

RT-SVX36K-EN 13

Page 14

General Information

Figure 3. Humidity vs. Current (ECEM Return RH, RTM

Outdoor RH)

Figure 4. Humidity vs. Current (RTM Space Humidity)

Table 4. Outside air flow range with Traq Sensor

Unit (AC/EC) CFM

20 & 25, 24 & 29 Ton 0-14000

30/36 Ton 0-17000 40/48 Ton 0-22000

50/59, 55 Ton 0-28000

60-75, 73-89 Ton 0-33000

90-130 Ton 0-46000

The velocity pressure transducer/solenoid assembly is

illustrated below. Refer to the “Traq Sensor Sequence of

Operation” section for VCM operation.

Figure 5. Velocity pressure transducer/solenoid

assembly

Ventilation Control Module

Tube from Tee to low side of Transducer

Transducer

Assembly is located inside the lter compartment

Tube from Solenoid to high side of Transducer

Ventilation Control Module

(VCM - Optional 3U218 used with Traq Fresh

Air Measurement and/ or CO2 Sensor)

The Ventilation Control Module (VCM) is located in the

filter section of the unit and is linked to the unit's UCM network. Using a “velocity pressure” sensing ring located in the outside air section, allows the VCM to monitor and control the quantity of outside air entering the unit to a minimum airflow setpoint.

An optional temperature sensor can be connected to the

VCM which enables it to control a field installed outside air

preheater.

If the unit has a VCM, an optional CO connected to the unit to the unit for CO reset permits the unit to reduce the amount of outside air entering the unit from the Design OA (Design OA damper%) to the DCV OA (DCV Minimum damper%) based on the space or return CO

level.The following table lists

the possible airflow range per unit size.

sensor can be

reset control. CO

Tube from low side of Velocity Flow Ring

Tube from high side of Velocity Flow Ring

Tee

N.O.

N.C.

COM.

Solenoid

Generic Building Automation System

Module

(GBAS - Optional 1U51 used with non-Trane

building control systems; 0-5 or 0-10 VDC)

The Generic Building Automation System (GBAS) module

allows a non-Trane building control system to

communicate with the rooftop unit and accepts external

setpoints in form of analog inputs for cooling, heating,

supply air pressure, and a binary Input for demand limit.

Refer to the“Field Installed ControlWiring” section for the

input wiring to the GBAS module and the various desired

setpoints with the corresponding DC voltage inputs for

both VAV and CV applications.

14 RT-SVX36K-EN

Page 15

General Information

Phase Monitor (1U3) Standard on 20-89 ton

Continuously monitors line voltage to protect against phase, loss, imbalance and reversal. If a fault is found with the supply voltage a LED on the phase monitor will indicate a fault and a unit External Auto Stop is activated through the controls. 75 to 130 ton units have a phase monitor on each compressor.

Multipurpose Module

MPM (Optional 1U105 used on units with Return Fan or with Evaporative Condenser)

The Multipurpose Module (MPM) receives information

from the Return Plenum Pressure sensor and provides for Return Fan control to maintain this pressure to the Active Return Plenum Pressure Setpoint and Deadband. The liquid line pressure sensor inputs for the refrigeration circuits are received through the MPM in support of head pressure control on Evaporative condenser units.

Input Devices & System Functions

The descriptions of the following basic Input Devices used

within the UCM network are to acquaint the operator with their function as they interface with the various modules. Refer to the unit's electrical schematic for the specific module connections.

Constant Volume (CV), Single

temperatures will be monitored during compressor

operation and compressor circuits will be shut down if this

difference exceeds a Human Interface selectable setpoint

value.

Leaving EvaporatorTemperature Sensor

(3RT14 and 3RT15)

An analog input device used to monitor the refrigerant

temperature inside the evaporator coil to prevent coil

freezing. It is attached to the suction line near the

evaporator coil and is connected to the MCM. It is factory

set for 30°F and has an adjustable range of 25°F to 35°F.The

compressors are staged “Off” as necessary to prevent

icing. After the last compressor stage has been turned

“Off”, the compressors will be allowed to restart once the

evaporator temperature rises 10°F above the “coil frost

cutout temperature” and the minimum three minute“Off”

time has elapsed.

Filter Switch (3S21 and 3S58)

This binary input device measures the pressure

differential across the unit filters. It is mounted in the filter

section and is connected to the RTM (1U48). A diagnostic

SERVICE signal is sent to the remote panel if the pressure

differential across the filters is at least 0.5" w.c.The

contacts will automatically open when the pressure

differential across the filters decrease to 0.4" w.c.The

switch differential can be field adjusted between 0.17" w.c.

to 5.0" w.c. ± 0.05" w.c.

Zone Variable Air Volume (SZVAV) & Variable Air Volume (VAV) Sensors and Controls

Supply Air Temperature Sensor (3RT9)

This analog input device monitors the supply air

temperature for; supply air temperature control (used with discharge temperature control), supply air temperature reset (used with discharge temperature control), supply air temperature low limiting (used with discharge temperature control), and supply air tempering. It is mounted in the supply air discharge section of the unit and is connected to the RTM (1U48).

Return Air Temperature Sensor (3RT6)

This analog input device is used with a return humidity

sensor when the comparative enthalpy option is ordered. It monitors the return air temperature and compares it to the outdoor temperature to establish which temperature is best suited to maintain the cooling requirements. It is mounted in the return air section and is connected to the ECEM (1U52).

Entering EvaporatorTemperature Sensor (3RT28 and 3RT29)

This analog input device is used with the Leaving

EvaporatorTemp sensor to provide Low Charge Protection of the refrigerant systems.The difference in these two

RT-SVX36K-EN 15

Supply and Exhaust Airflow Proving Switches

(3S68 and 3S69)

3S68 is a binary input device used to signal the RTM when

the supply fan is operating. It is located in the supply fan

section of the unit and is connected to the RTM (1U48).

During a request for fan operation, if the differential switch

is detected to be open for 40 consecutive seconds;

compressor operation is turned “Off”, heat operation is

turned “Off”, the request for supply fan operation is turned

“Off” and locked out, exhaust dampers (if equipped) are “closed”, economizer dampers (if equipped) are “closed”,

and a manual reset diagnostic is initiated.

3S69 is a binary input device used on all rooftop units

equipped with an exhaust fan. It is located in the exhaust/

return fan section of the unit and is connected to the RTM

(1U48). During a request for fan operation, if the

differential switch is detected to be open for 40

consecutive seconds, the economizer is closed to the

minimum position setpoint, the request for exhaust fan

operation is turned “Off” and locked out, and a manual

reset diagnostic is initiated.The fan failure lockout can be

reset; at the Human Interface located in the unit's control

panel, byTracer, or by cycling the control power to the

RTM (1S70 Off/On).

Lead-Lag

Is a standard mode of operation on 20 thru 130Ton units.

It alternates the starting between the first compressor of

Page 16

General Information

each refrigeration circuit. On 40 - 89 Ton units only the compressor banks will switch, not the order the compressors within a bank, providing the first compressor in each circuit had been activated during the same request for cooling. Lead lag is not available with variable speed compressor.

Supply and Exhaust/Return Fan Circuit Breakers (with 1CB1 and 1CB2)

The supply fan and exhaust fan motors are protected by

circuit breakers 1CB1 and 1CB2 respecti vely for 208 -230 V applications.They will trip and interrupt the power supply to the motors if the current exceeds the breaker's “must trip” value. For 460 -575 V applications, fan motors will be protected with manual motor protectors.The rooftop module (RTM) will shut all system functions “Off” when an open fan proving switch is detected.

Manual Motor Protectors (380V through 575V Only)

Manual motor protectors will be used as branch circuit protection for compressors and supply fan motors.These devices are capable of providing both overload and shortcircuit protection. Before operating, the manual motor protector must be switched with the rotary on/off switch to the “ON” position and the overload setpoint dial must be set to the appropriate rating of the motor.

Important: In order to avoid nuisance trips, the

overload setpoint dial must be adjusted to the following calculated value: Overload Setting = (Motor FLA) Overload Setting = (Compressor RLA) x 1.12

Return Plenum Pressure High Limit

The Return Plenum Pressure High Limit Setpoint has a

non-adjustable value of 3.5 iwc. When the return plenum pressure exceeds the Return Plenum Pressure High Limit for more than 1 second, a “Return Pressure shutdown” signal is sent, and an automatically resetting diagnostic is set. After the return fan is off, the Return Pressure Shutdown signal is cancelled.The unit will not be allowed to restart within 15 seconds of shutdown. Three consecutive occurrences of the Return Plenum Pressure exceeding the Return Plenum Pressure Limit will cause a manual reset diagnostic.The occurrence counter will be reset every time the unit goes through a reset, transitions from Stop to Auto, or transitions into and out of Occupied or Unoccupied control.

Low Pressure Control (LPC)

LPC is accomplished using a binary input device. LP cutouts are located on the suction lines near the scroll compressors.The LPC contacts are designed to close when the suction pressure exceeds 41± 4 psig. If the LP control is open when a compressor is requested to start, none of the compressors on that circuit will be allowed to operate.They are locked out and a manual reset diagnostic is initiated.

The LP cutouts are designed to open if the suction

pressure approaches 25± 4 psig. If the LP cutout opens

after a compressor has started, all compressors operating

on that circuit will be turned off immediately and will

remain off for a minimum of three minutes. If the LP cutout

trips four consecutive times during the first three minutes

of operation, the compressors on that circuit will be locked

out and a manual reset diagnostic is initiated.

Saturated CondenserTemperature Sensors

(2RT1 and 2RT2)

These analog input devices are mounted inside a

temperature well located on a condenser tube bend.They

monitor the saturated refrigerant temperature inside the

condenser coil and are connected to the SCM/MCM

(1U49). As the saturated refrigerant temperature varies

due to operating conditions, the condenser fans are cycled

“On” or “Off” as required to maintain acceptable

operating pressures. For evaporative condensers, this

value is determined by the MPM whichconvertsa pressure

to a temperature value that is sent to the MCM to be used

for head pressure control.

Head Pressure Control (HPC)

This is accomplished using one saturated refrigerant

temperature sensors per refrigeration circuit. During a

request for compressor operation, when the condensing

temperature rises above the “lower limit” of the control

band, the Compressor Module (SCM/MCM) starts

sequencing condenser fans “On”. If the operating fans can

not bring the condensing temperature to within the

control band, more fans are turned on.

As the saturated condensing temperature approaches the

lower limit of the control band, fans are sequenced “Off”.

The minimum “On/Off” time for condenser fan staging is

5.2 seconds. If the system is operating at a given fan stage

below 100% for 30 minutes and the saturated condensing

temperature is above the “efficiency check point” setting,

a fan stage will be added. If the saturated condensing

temperature falls below the “efficiency check point”

setting, the fan control will remain at the present operating

stage. If a fan stage cycles four times within a 10 minute

period, the control switches from controlling to the“lower

limit” to a temperature equal to the “lower limit” minus

the “temporary low limit suppression” setting. It will

utilize this new “low limit” temperature for one hour to

reduce condenser fan short cycling.

For Evaporative Condensing units, Head pressure is

monitored with pressure transducers attached to the

Saturated Condensing line and converted to a

temperature by the MPM.This temperature is used to

control the variable speed fan and control the sump pump.

When the temperature rises above the Upper Limit (120F)

the Sump Pump is energized. If the Condensing

Temperature drops below the Lower Limit (70F) the Sump

Pump is de-energized.

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General Information

High Pressure Controls (HPC)

High Pressure controls are located on the discharge lines near the scroll compressors.They are designed to open when the discharge pressure approaches 650 ± 10 psig.

The controls reset automatically when the discharge

pressure decreases to approximately 550 ± 10 psig. However, the compressors on that circuit are locked out and a manual reset diagnostic is initiated after the fourth occurrence of a high pressure condition.

If the HPC opens after a compressor has started, all compressors on that circuit will be turned off immediately and will remain off for a minimum of 15 minutes. If the HPC trips four consecutive times during the first 3 minutes of operation, the compressors on that circuit will be locked out and a manual reset diagnostic is initiated.

Variable speed compressor circuits use a different HPC

switch with 24 VDC contacts input to the inverter. Otherwise, the variable speed HPC circuit is functionally the same as described above.

High Compressor Pressure Differential Protection

20-75T units provides High Compressor Pressure Differential protection for the equipment , also referred to as Low VI compressor protection.This protection is active on a per circuit basis and prevents scroll involute stresses from exceeding levels that could cause compressor damage.

Two levels of control are implemented to support the High

Compressor Pressure Differential protection: Limit and Diagnostic trips.

During a Limit trip, the controller will determine when the pressure differential has exceeded predetermined limits and will then take action by either limiting the compressor capacity or by unloading/reducing the compressor capacity on that circuit. Once the pressure differential returns to an acceptable level, the circuit will become unlimited if still needed for temperature control.

During a Diagnostic trip, the controller will determine when the pressure differential has exceeded acceptable levels for the equipment and will then de-energize the circuit completely. Once the pressure differential returns to an acceptable level, the circuit will be allowed to reenergize if still needed for temperature control. If four Diagnostic trips occur within the same request for compressor operation, the circuit will be locked out on a manual reset diagnostic.

If actively limiting or controlling compressor outputs “OFF” due to a High Compressor Pressure Differential event, the Limit/Diagnostic event will be found under Status/ Compressor Status Submenu at the Human Interface. During a diagnostic trip a diagnostic will be indicated at the Human Interface.

Outdoor Air Humidity Sensor (3U63)

This is an analog input device used on applications with

100% economizer. It monitors the outdoor humidity levels

for economizer operation. It is mounted in the outside air

intake section and is connected to the RTM (1U48).

Return Air Humidity Sensor (3U64)

This is an analog input device used on applications with

the comparative enthalpy option. It monitors the return air

humidity level and compares it to the outdoor humidity

level to establish which conditions are best suited to

maintain the cooling requirements. It is mounted in the

return air section and is connected to the ECEM (1U52).

Space/Duct Humidity Sensor (5U108)

Analog input device used on applications with modulating

dehumidification option and/or humidification field

installed option. It is used to monitor the humidity level in

the space and for comparison with the dehumidification

and humidification setpoints to maintain space humidity

requirements. It is field mounted in the space and

connected to the RTM (1TB16).

Low Ambient Option 0° Fahrenheit (2U84,

2U85)

Air cooled units ordered with Low Ambient 0° Fahrenheit

will control the low ambient dampers (2U84, 2U85) to the

programmable Low Ambient Control Point based on

saturated condenser temperature during compressor

operation.

Status/Annunciator Output

This is an internal function within the RTM (1U48) module

that provides;

a. diagnostic and mode status signals to the remote

panel (LEDs) and to the Human Interface.

b. control of the binary Alarm output on the RTM.

c. control of the binary outputs on the GBAS module

to inform the customer of the operational status and/or diagnostic conditions.

Low Ambient Compressor Lockout

Utilizes an analog input device. When the system is

configured for low ambient compressor lockout, the

compressors are not allowed to operate if the temperature

of the outside air falls below the lockout setpoint. When

the temperature rises 5°F above the lockout setpoint, the

compressors are allowed to operate.The setpoint for units

without the low ambient option is 50°F. For units with the

low ambient option, the setpoint is 0°F. The setpoints are

adjustable at the Human Interface inside the unit control

panel.

Space Pressure Transducer (3U62)

This is an analog input device that modulates the exhaust

damper or exhaustVFD to keep the space pressure within

the building to a customer designated control band. It is

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General Information

mounted in the filter section just above the exhaust damper actuator and is connected to the ECEM (1U52). Field supplied pneumatic tubing must be connected between the space being controlled and the transducer assembly.

MorningWarm-Up - Zone Heat (CV and VAV)

When a system changes from an unoccupied to an

occupied mode, or switches from STOPPED to AUTO, or power is applied to a unit with the MWU option, the heater in the unit or external heat will be brought on if the space temperature is below the MWU setpoint.The heat will remain on until the temperature reaches the MWU setpoint. If the unit is VAV, then the VAV box/unocc relay will continue to stay in the unoccupied position and the

VFD output will stay at 100% during the MWU mode.When

the MWU setpoint is reached and the heat mode is terminated, then the VAV box/unocc relay will switch to the occupied mode and the VFD output will be controlled by the duct static pressure. During Full Capacity MWU the economizer damper is held closed for as long as it takes to reach setpoint. During Cycling Capacity MWU the economizer damper is allowed to go to minimum position after one hour of operation if setpoint has not been reached.

Compressor Motor Winding Thermostats

CSHD compressors (20-70 Ton) Air-Cooled and (2480 Ton) Evaporative Condensers

The compressors contains an internal line break overload

whichstops the compressors under a number of operating conditions that cause excessi ve motor temperature.These include rapid cycling, loss of charge, abnormally high suction temperatures, excessive amperage, phase loss and low voltage

CSHN Compressors (75 - 130 Ton) Air-Cooled and (89 Ton) Evaporative Condensers

PTC sensors are embedded in the motor windings of each Scroll compressor. These sensors are wired to the protection module which protects the motor from over temperature that can occur under a number of abnormal operating conditions.These include rapid cycling, loss of charge, abnormally high suction temperatures, low voltage and excessive amperage.

During a request for compressor operation, if the Compressor Module (SCM) detects a problem outside of normal parameters, it turns any operating compressor(s) in that circuit “Off”, locks out all compressor operation for that circuit, and initiates a manual reset diagnostic.

VZH Variable Speed Compressors

Over current and over torque protection for VZH compressors are provided by theTRV200 inverter. VZH over temperature protection is not required.

Freeze Avoidance

FreezeAvoidanceis a feature which helps prevent freezing

of hydronic heat coils and avoiding nuisance hydronic

heat freezestat trips.This is accomplished by opening

inactive hydronic heat valve(s) at low ambient

temperatures.

Typically, when the unit is in a mode where the supply fan

is off, the OA temperature is monitored. If it falls below 45

ºF (5 degrees above the freezestat), the hydronic heat

valve(s) are opened to the Standby Freeze Avoidance

Position. When the OA temperature rises above 47 ºF,

occupied mode is requested, or the supply fan is

requested ON the hydronic heat valve(s) release to normal

control.

When the supply fan is commanded on, the OA dampers

will remain closed for one minute to remove the heat from

the hydronic heating coil.This prevents freezestat trips

and falsely loading the supply air temperature causing

premature compressor operation.This function is

disabled if the Standby FreezeAvoidance Position is set to

0%.

Supply Air Temperature Low Limit

Uses the supply air temperature sensor input to modulate

the economizer damper to minimum position in the event

the supply air temperature falls below the occupied

heating setpoint temperature.

Freezestat (4S12)

This is a binary input device used on units with Hydronic

Heat. It is mounted in the heat section and connected to the

Heat Module (1U50). If the temperature of the air entering

the heating coil falls to 40°F, the normally open contacts on

the freezestat closes signalling the Heat Module (1U50)

and the Rooftop Module (RTM) to:

• Drive the Hydronic Heat Actuator (4U15) to the full open position.

• Turn the supply fan “Off”.

• Closes the outside air damper;

• Turns “On” the SERVICE light at the Remote Panel.

• Initiates a “Freezestat” diagnostic to the Human Interface.

High Duct Temp Thermostats (Optional 3S16, 3S17)

These are binary input devices used with a Trane

Communication Interface Module (TCI).They provide

“high limit” shutdown of the unit and requires a manual

reset.They are factory set to open if the supply air temperature reaches 240°F, or the return air temperature reaches135°F. Once tripped, the thermostat can be reset by pressing the button located on the sensor once the air temperature has decreased approximately 25°F below the cutout point.

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General Information

Compressor Circuit Breakers (1CB8, 1CB9, 1CB10, 1CB11)

The Scroll Compressors are protected by circuit breakers

for 208 - 230 volt units which interrupt the power supply to the compressors if the current exceeds the breakers“must trip” value. For 460 -575 volt units the Scroll compressors will be protected with Manual Motor protectors. During a request for compressor operation, if the Compressor Module detects a problem outside of it's normal parameters, it turns any operating compressor(s) on that circuit “Off”, locks out all compressor operation for that circuit, and initiates a manual reset diagnostic.

Constant Volume (CV) Units

Zone Temperature - Cooling

Relies on input from a sensor located directly in the space, while a system is in the occupied “Cooling” mode. It modulates the economizer (if equipped) and/or stages the mechanical cooling “On and Off” as required to maintain the zone temperature to within the cooling setpoint deadband.

Zone Temperature - Heating

Relies on input from a sensor located directly in the space, while a system is in the occupied “Heating” mode or an unoccupied period, to stage the heat “on and off” or to modulate the heating valve (hydronic heat only) as required to maintain the zone temperature to within the heating setpoint deadband.The supply fan will be requested to operate any time there is a requested for heat. On gas heat units, the fan will continue to run for 60 seconds after the furnace is turned off.

Supply Air Tempering

On CV ZoneTemperature Control units, if the supply air temperature falls 10°F below the zone temperature setpoint up to half of the available heat capacity will be brought on until the supply air temperature reaches 10°F above zone temperature setpoint.

Single Zone Variable Air Volume (SZVAV) Only

The IntelliPak controls platform supports Single ZoneVAV

as an optional unit control type in order to meet ASHRAE

90.1.The basic control is a hybrid VAV/CV configured unit that provides discharge temperature control to a varying discharge air temperature target setpoint based on the space temperature and/or humidity conditions. Concurrently, the unit will control and optimize the supply fan speed to maintain the zone temperature to a zone temperature setpoint.

Supply Fan VFD Control

Single Zone VAV units are equipped with a VFD-controlled supply fan which is controlled via a 0-10VDC signal from

the Rooftop Module (RTM). With the RTM supply fan output energized and the RTMVFD output at 0VDC, the fan speed output is 37% from the VFD by default; and at 10VDC the fan speed output is 100%.The control scales the VDC output from the RTM linearly to control fan speed output between 37-100%.The VFD will modulate the supply fan motor speed, accelerating or decelerating as required to maintain the zone temperature to the zone temperature setpoint. When subjected to high ambient return conditions the VFD will reduce its output frequency to maintain operation. Bypass control is offered to provide full nominal airflow in the event of drive failure.

Ventilation Control

Units configured for Single Zone VAV control require special handling of the OA Damper Minimum Position control in order to compensate for the non-linearity of airflow associated with the variable supply fan speed and damper combinations. Units configured for TRAQ with or without DCV use the same sequence of operation as VAV or CV units.

Space Pressure Control

For SZVAV units configured with or without Space Pressure Control (StatiTrac), the Exhaust Enable Setpoint (based on the outside air damper position) is used when the Supply Fan is at 100%. A Target setpoint is internally calculated when the supply fan is at less than 100%. The exhaust fan is allowed to start when theTarget setpoint is reached. If the Exhaust Enable Setpoint is set to 0%, then the exhaust fan will be allowed to start whenever the

Active Minimum position is reached regardless of supply

fan speed.

Occupied Cooling Operation

For normal cooling operation, cooling capacity will be staged or modulated in order to meet the calculated discharge air target setpoint. If the current active cooling capacity is controlling the discharge air within the deadband, no additional cooling capacity change will be requested. As the Discharge Air Temperature rises above the deadband, the algorithm will request additional capacity as required (additional compressors or economizer).As the Discharge AirTemperature falls below the deadband, the algorithm will request a reduction in active capacity.

Default Economizer Operation

By default, the unit will be setup to optimize the minimum supply fan speed capability during Economizer Only operation. If the economizer is able to meet the demand alone, due to desirable ambient conditions, the supply fan speed will be allowed to increase above the minimum prior to utilizing mechanical cooling if discharge air setpoint falls below the discharge air Lower Limit (Cooling) setpoint.

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General Information

Unoccupied Mode

In Unoccupied mode the unit will utilize setback setpoints, 0% Minimum OA Damper position, and Auto Fan Mode operation as on normal CV units.The Supply Fan speed, and cooling and modulating types of heat, will be controlled to the discharge air target setpoint as is done during occupied periods.The Supply fan speed during staged heat control will be forced to 100% as on normal CV units.

Occupied Heating Operation

If the unit has 2 Stage Gas or Electric Heat, the unit will drive the supply fan to maximum flow and stage heating to control to the Zone Heating Setpoint. If the unit has Modulating Gas or Hydronic heat, the supply fan VFD will modulate as needed. On an initial call for heating, the supply fan will drive to the minimum heating airflow. On an additional call for heating, the heat will control in order to meet the calculated discharge air target setpoint. As the load in the zone continues to request heat operation, the supply fan will ramp-up while the control maintains the heating discharge air temperature. If the unit has Modulating Gas or Hydronic heat, heating can be configured for either the energy saving SZVAV Heating solution as described above, or with the supply fan required to ramp to 100% during heating.

Compressor (DX) Cooling

Compressor control and protection schemes will function identical to that of a traditional unit. Normal compressor proving and disable input monitoring will remain in effect as well as normal 3-minute minimum on, off, and interstage timers. Also, all existing head pressure control schemes will be in effect.

Cooling Sequence

If the control determines that there is a need for active cooling capacity in order to meet the calculated discharge air target setpoint, the unit will begin to stage or modulate compressors accordingly. Once the discharge air target setpoint calculation has reached the Minimum Setpoint and compressors are being utilized to meet the demand, the control will begin to ramp the supply fan speed up toward 100% to meet any additional cooling demand.

As the cooling load in the zone decreases the zone cooling algorithm will reduce the speed of the fan down to minimum per compressor stage and control the compressors accordingly. As the compressors begin to stage or modulate back, the supply fan speed will fall back to the Cooling Stage’s associated minimum fan speed, but not below. As the load in the zone continues to drop, cooling capacity will be reduced in order to maintain the discharge air within the ± ½ dischargeair target deadband.

Variable Air Volume (VAV) Units

Occupied Heating - Supply Air Temperature

When a DischargeTemperature Control unit is equipped

with “Modulating Heat”, and the system is in an occupied mode, and the field supplied changeover relay contacts (5K87) have closed, the supply air temperature will be controlled to the customer specified supply air heating setpoint. It will remain in the heating status until the changeover relay contacts are opened.

Occupied Cooling - Supply Air Temperature

When a DischargeTemperature Control unit is in the

occupied mode, the supply air temperature will be controlled to the customers specified supply air cooling setpoint by modulating the economizer and/or staging the mechanical cooling “On and Off” as required.The changeover relay contacts must be open on units with

“Modulating Heat” for the cooling to operate.

DaytimeWarm-up (VAV Only)

On DischargeTemperature Control units equipped with heat, if the zone temperature falls below the daytime warm-up initiate temperature during the occupied mode, the system will switch to full airflow. During this mode, the

VAV box/unocc relay, RTM K3, will be energized (this is to

signal the VAV boxes to go to 100%). After the VAV box max stroke time has elapsed (factory set at 6 minutes), the

VFD output will be set to 100%.The airflow will be at 100%

and the heat will be turned on to control to the occupied heating setpoint. When the zone temperature reaches the daytime warm-up termination setpoint, the heat will be turned off, the K3 relay will be de-energized, releasing the

VAV boxes, the VFD output will go back to duct static

pressure control and the unit will return to discharge air control. If the occ zone heating setpoint is less than the DWU terminate setpoint, the heat will turn off when the occ zone heat setpoint is reached, but it will stay in DWU mode and cycle the heat to maintain setpoint.

Unoccupied Heating - Zone Temperature

When a DischargeTemperature Control unit is equipped

with gas, electric, or hydronic heat and is in the unoccupied mode, the zone temperature will be controlled to the default or customer provided setpoint. During an unoccupied mode for a VAV unit, the VAV box/unocc relay will be in the unoccupied position and the VFD output will be at 100%.This means that if there is a call for heat (or cool) and the supply fan comes on, it will be at full airflow and the VAV boxes in the space will need to be 100% open as signaled by the VAV box/unocc relay.

Unoccupied Cooling - Zone Temperature

When the unit is in the unoccupied mode, the zone

temperature will be controlled to the default or customer provided unoccupied cooling setpoint. During an unoccupied mode for a VAV unit, the VAV box/unocc relay will be in the unoccupied position and the VFD will be at

20 RT-SVX36K-EN

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General Information

100%. On units with a VSPD Compressor, during Unoccupied Cooling operation the VSPD Compressor will be controlled at its 100% capacity as applied to the unit.

TheVSPD Compressor will be staged On/Off as a standard

staged compressor.

Supply Air Tempering

On DischargeTemperature Control units equipped with

“Modulating Heat”, if the supply air temperature falls 10°F

below the supply air temperature setpoint, the hydronic or modulating gas heat valve will modulate to maintain the supply air temperature to within the low end of the setpoint deadband.

Figure 6. Transducer voltage output vs. pressure input (supply, return, space pressure)

-0.75 to 9.0 Iwc Pressure Transducer Voltage Output vs. Pressure Input

4.50

4.00

3.50

3.00

2.50

Volts

2.00

1.50

1.00

0.50

0.00

250.2

-0.

Pressure (inches w.c.)

Supply Duct Static Pressure Control (Occupied)

The RTM relies on input from the duct pressure transducer

when a unit is equipped with a Variable Frequency Drive.

The unit controls will raise or lower the supply fan speed

to maintain the supply duct static pressure to within the static pressure setpoint deadband. Figure 6 below shows the pressure transducer output voltage relationship to input pressure.The unit is comparing supply duct pressure to ambient (outside) pressure.The pressure transducer input is factory piped to measure the pressure in the discharge section of the unit. Refer to Figure 29 to see how the transducer tubing is connected.

Supply Duct Static Pressure Control (Occupied)

The RTM relies on input from the duct pressure transducer

when a VAV unit is equipped with a Variable Frequency Drive.This input allows the unit to control the supply fan speed in order to maintain the supply duct static pressure to within the static pressure setpoint deadband.

dischargeopening. 20-55 ton sizes are single fan, 60-75 ton sizes (shown) have two fan assemblies.

Figure 7. DDP supply fan

Direct Drive Plenum (DDP) Supply Fan Option

DDP supply fans are positioned down stream of the fan board. DDP option includes a grate welded in the unit

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General Information

Figure 8. Unit component layout and "ship with" locations

Optional Heat or final filters

Space Temperature Averaging

Space temperature averaging for Constant Volume applications is accomplished by wiring a number of remote sensors in a series/parallel circuit.

The fewest number of sensors required to accomplish

space temperature averaging is four.The Space

Temperature Averaging with Multiple Sensors figure

illustrates a single sensor circuit (Single Zone), four sensors wired in a series/parallel circuit (Four Zone), nine sensors wired in a series/parallel circuit (Nine Zone). Any number squared, is the number of remote sensors required.

22 RT-SVX36K-EN

Wiring termination will depend on the type of remote

panel or control configuration for the system. Refer to the wiring diagrams that shipped with the unit.

Page 23

General Information

Figure 9. Space temperature averaging

Space Temperature Averaging with Multiple Sensors Unit Control Modules (UCM)

Unit control modules are microelectronic circuit boards designed to perform specific unit functions.These modules through Proportional/Integral control algorithms provide the best possible comfort level for the customer.

They are mounted in the control panel and are factory

wired to their respective internal components.They receive and interpret information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request for economizing, mechanical cooling, heating, and ventilation. Figure 9 below illustrates the typical location of each “1U” designated module.

Figure 10. Control module locations for 20-36 ton units

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General Information

Figure 11. Control module locations for 40 - 89 ton units

eFlex Variable Speed Compressor Staging

Note: The eFlex variable speed compressor can be

manually controlled only in service test mode through the Intellipak controller human interface.

TheTRV200 inverter keypad has been

programmed purposely to provide stop, reset, and diagnostics functions only.This is to prevent bypass of compressor protection functions provided by the Intellipak control logic.

Figure 12 generally describes how the Intellipak controller

sequences the eFlex variable speed compressor as building load increases. It is assumed that the unit is equipped with an economizer.

At low building loads, the economizer will often meet the building load and compressor cooling will not be required.

Then as the building load increases and the economizer no

longer can maintain setpoint, the Intellipak controller sends a signal to the TRV200 inverter to start the variable speed compressor (1A).TheTRV200 inverter ramps the compressor up to 50Hz for 10 seconds to insure compressor startup lubrication. Control is released back to the Intellipak controller and the compressor runs at minimum speed command (0 VDC from VSM board).

Until the building load exceeds the variable speed compressor capacity at minimum speed, the Intellipak compressor will cycle the variable speed compressor to meet setpoint (4 minute minimum on/off time). However,

since variable speed unit minimum capacity is about 15%, this transition cycling will be less than a typical fixed speed compressor unit which may have 25% minimum capacity.

As the building load increases and eventually equals the

variable speed compressor capacity at minimum speed, the compressor will run continuously and no longer cycle.

Then as the building load increases, the Intellipak

controller will increase compressor speed to meet the setpoint.When the variable speed compressor eventually reaches maximum speed and more capacity is required, a fixed speed compressor is started while the variable speed compressor speed is simultaneously ramped back down to minimum. Note that capacity overlap is provided between each stage of operation to provide continuous capacity modulation and minimize compressor cycling between stages.

24 RT-SVX36K-EN

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Figure 12. eFlex variable speed compressor, IntelliPak controller sequences

General Information

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Installation

Unit Inspection

As soon as the unit arrives at the job site

[ ] Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data).

[ ] Verify that the power supply complies with the unit nameplate specifications.

[ ] Verify that the power supply complies with the electric heater specifications on the unit nameplate.

[ ] Visually inspect the exterior of the unit, including the roof, for signs of shipping damage.

[ ] Check for material shortages. Refer to the Component Layout and Ship with location illustration.

If the job site inspection of the unit reveals damage or material shortages, file a claim with the carrier immediately.Specify the type and extent of the damage on the “bill of lading” before signing.

[ ] Visually inspect the internal components for shipping damage as soon as possible after delivery and before it is stored. Do not walk on the sheet metal base pans.

WARNING

No Step Surface!

FOR ACCESS TO COMPONENTS,THE BASE SHEET METAL SURFACE MUST BE REINFORCED. DDP SUPPLY FANS REQUIRE BRIDGING OVERTHE DISCHARGE OPENING.

Bridging between the unit's main supports may consist of multiple 2 by 12 boards or sheet metal grating. Failure to comply could result in death or severe personal injury from falling.

[ ] If concealed damage is discovered, notify the carrier's terminal of damage immediately by phone and by mail. Concealed damage must be reported within 15 days.

Table 5. Unit Dimensions & Weight Information

Request an immediate joint inspection of the damage by the carrier and the consignee. Do not remove damaged material from the receiving location.Take photos of the damage, if possible.The owner must provide reasonable evidence that the damage did not occur after delivery.

Storage

Take precautions to prevent condensate from forming

inside the unit’s electrical compartments and motors if:

1. the unit is stored before it is installed; or,

2. the unit is set on the roof curb, and temporary heat is provided in the building. Isolate all side panel service entrances and base pan openings (e.g., conduit holes, S/A and R/A openings, and flue openings) from the ambient air until the unit is ready for startup.

Note: Do not use the unit's heater for temporary heat

without first completing the startup procedure detailed under “Starting the Unit”.

Trane will not assume any responsibility for equipment

damage resulting from condensate accumulation on the unit's electrical and/or mechanical components.

Unit Clearances

Figure 13 illustrates the minimum operating and service

clearances for either a single or multiple unit installation.

These clearances are the minimum distances necessary to

assure adequate serviceability, cataloged unit capacity, and peak operating efficiency.

Providing less than the recommended clearances may result in condenser coil starvation, “short-circuiting” of exhaust and economizer airflows, or recirculation of hot condenser air.

Description Reference

Unit dimensions, 20-75 Ton (SAHL)

Unit dimensions, 90-130 Ton Figure 17, p. 33

Typical unit and operation weights Table 13, p. 35

Center-of-Gravity illustration and related dimensional data Figure 18, p. 34

Unit dimensions, 20-89 Ton

(SEH_, SFH_, SLH_, SSH_, and SXH_)

Typical unit and operation weights

Center-of-Gravity illustration and related dimensional data Figure 18, p. 34

(a)Weights shown represent approximate operating weights. Actual weights are stamped on the unit nameplate.

26 RT-SVX36K-EN

Air-Cooled Condenser

Evaporative Condenser

(a)

Figure 14, p. 28, Table 6, p. 28, Table 7,

and Table 8, p. 29,

Figure 15, p. 29, Table 9, p. 30,

Table 10, p. 30, and Table 11, p. 30

Table 14, p. 36

Page 27

Figure 13. Minimum operation and service clearances for single and multiple unit installation

Single Unit Installation

Legend

Return Air Opening

Outside Air Intake

Supply Air Opening

Condenser Section

Optional 2’10-3/4” Exhaust/Return Access Door (180° swing)

Hinged 2’10-3/4” Filter Access Door (180° swing)

Hinged 2’10-3/4” optional Heater or Final Filter Access Door (180° swing)

Hinged 2’10-3/4” Supply Fan Access Door (180° swing) (90-130 ton)

Hinged 2’4-1/2” Control Panel Door (180° swing) (90-130 ton)

Hinged 2’10-3/4” VFD Access Door (180° swing)

Hinged 2’10-3/4” Evap Condenser Access Door (180° swing)

Hinged 2’8” Control Panel Door (180° swing) (20-36 ton)

Hinged 3’6” Control Panel Door (180° swing) (40-89 ton)

Installation

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Installation

Figure 14. SAHL cooling-only units (20 - 75) Use Table 6, Table 7 and Table 8

1” CONDENSATE DRAIN CONNECTION (Both Sides)

Table 6. SAHL cooling-only units (20 - 75)

Dimensions for SAHL

Unit Size

20 & 25 Ton 21’-9 3/4” 6’-9” 7'-6 1/2" 7’-3 1/4” 3'-9 5/16" 12'-6” 1" 7’ 1'-3 1/2”

30 Ton 21’-9 3/4” 6’-9” 7'-6 1/2" 7’-3 1/4” 4'-9 5/16" 12'-6” 1" 7’ 1'-3 1/2” 40 Ton 29’-8” 6’-9” 7'-6 1/2" 7’-3 1/4” 5'-9 5/16" 15'-11 1/8" 1" 8’ 2'-5” 50 Ton 29’-8” 6’-9” 7'-6 1/2" 7’-3 1/4” 6'-9 5/16" 15'-11 1/8" 1" 8’ 2'-5” 60 Ton 29’-8” 6’-9” 9'-8" 7’-3 1/4” 5'-9 5/16" 15'-11 1/8" 1" 8’ 2'-5”

70 & 75 Ton 29’-8” 6’-9” 9'-8" 7’-3 1/4” 5'-9 5/16" 15'-11 1/8" 1" 8’ 2'-5”

A B C D E F G H J

28 RT-SVX36K-EN

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Installation

Table 7. SAHL cooling-only units (20 - 75)

Dimensions for SAHL

E F G

Unit Size

20 - 30 Ton 14'-0 1/4" 2'-2 1/2" 11 3/4" 5'-7" 3'-4 3/8" 2'-9 15/16” 5 13/16" 28 5/8” 6'-6 15/16" 3' 40 - 50 Ton 16'-1 13/16” 2'-5" 11 3/4" 5'-7" 3'-4 3/8" 3' - 1 1/2” 5 13/16" 32 15/16” 7'-8 3/16" 3'-4”

60 Ton 16'-1 13/16” 2'-5" 1'-4 9/16" 6'-10 7/8" 4'-5 3/8" 4' - 2 1/2” 5 13/16" 26 7/16” 7'-8 3/16" 4'-5”

70 - 75 Ton 16'-1 13/16” 2'-5" 1'-4 9/16" 6'-10 7/8" 4'-5 3/8" 4' - 2 1/2” 5 13/16" 26 7/16” 7'-8 3/16" 4'-5”

A B C D

w/exhaust

fan

w/return

fan

exhaust

fan

Table 8. SAHL cooling-only units (20 - 75)

Dimensions

Unit Size

20, 25, 30 & 50 Ton 8 7/32" 6 31/32" 15 21/32" 13 21/32" 9 17/32" 8 1/2" 18 1/16" 19 9/16" 40, 60, 70 & 75 Ton 8 3/4" 7 3/4" 17 7/8" 15 7/8" 9 29/32" 10 1/16" 20 13/32" 22 5/32"

F G H J K L M N

Figure 15. SEHL, SFHL, SLHL, SSHL, SXHL units (20 - 89 ton) use Table 9, Table 10 and Table 11.

return

fan

w/exhaust

fan

w/return

fan

1” NPT CONDENSATE DRAIN CONNECTION (Both Sides)

DRAIN HOLE

RT-SVX36K-EN 29

Page 30

Installation

Table 9. SEHL, SFHL, SLHL, SSHL, SXHL units (20 - 89 ton)

Air-Cooled Unit Dimensions

Unit Size

20 & 25 Ton 24'-1 3/8" 6’-9” 7'-6 1/2" 7’-3 1/4” 3'-9 5/16" 13'-3" 1" 7' 1'-3 1/2" 16'-7" 16'-6" 8 1/8" 6 1/4" 9"

30 Ton 24'-1 3/8" 6’-9” 7'-6 1/2" 7’-3 1/4” 4'-9 5/16" 13'-3" 1" 7' 1'-3 1/2" 16'-7" 16'-6" 8 1/8" 6 1/4" 9" 40 Ton 32'-10 1/2” 6’-9” 7'-6 1/2" 7’-3 1/4” 5'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 19'-7"

50 Ton 32'-10 1/2" 6’-9” 7'-6 1/2" 7’-3 1/4” 6'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 19'-7"

60 Ton 32'-10 1/2” 6’-9” 9'-8" 7’-3 1/4” 5'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 19'-7"

70 & 75 Ton 32'-10 1/2” 6’-9” 9'-8" 7’-3 1/4” 5'-9 5/16" 15'-11 1/8" 1" 8' 2'-5” 19'-7"

Table 10. SEHL, SFHL, SLHL, SSHL, SXHL units (20 - 89 ton)

Unit Size

24 & 39 Ton 26’5 1/2” 6’-9” 7’-6 1/2” 8’-4 3/4” 3’-9 5/16” 13’-3” 1" 7” 1'-3 1/2" 16'-7" 16'-6" 8 1/8" 6 1/4" 9"

36 Ton 26’5 1/2” 6’-9” 7’-6 1/2” 8’-4 3/4” 4’-9 5/16” 13’-3” 1" 7” 1'-3 1/2" 16'-7" 16'-6" 8 1/8" 6 1/4" 9" 48 Ton 32’-10 1/2” 6’-9” 7’-6 1/2” 8’-4 3/4” 5’-9 5/16” 15’-11 1/8” 1" 8” 2'-5" 19'-7"

59 Ton 32’-10 1/2” 6’-9” 7’-6 1/2” 8’-4 3/4” 6’-9 5/16” 15’-11 1/8” 1" 8” 2'-5" 19'-7"

73 Ton 32’-10 1/2” 6’-9” 9’-8” 8’-4 3/4” 5’-9 5/16” 15’-11 1/8” 1" 8” 2'-5" 19'-7"

80 & 89 Ton 32’-10 1/2” 6’-9” 9’-8” 8’-4 3/4” 5’-9 5/16” 15’-11 1/8” 1" 8” 2'-5” 19'-7"

Note: 19'-6” for SFHL “High Heat” units or 20'-3” for SFHL “Low Heat” units.

A B C D E F G H J K L M N O

See

8 1/8" 6 1/4" 9"

Note

See

8 1/8" 6 1/4" 9"

Note

See

8 1/8" 6 1/4" 9"

Note

See

8 1/8" 6 1/4" 9"

Note

Evaporative Condensing Unit Dimensions

A B C D E F G H J K L M N O

See

8 1/8" 6 1/4" 9"

Note

See

8 1/8" 6 1/4" 9"

Note

See

8 1/8" 6 1/4" 9"

Note

See

8 1/8" 6 1/4" 9"

Note

Table 11. SEHL, SFHL, SLHL, SSHL, SXHL units (20 - 89 ton)

Dimensions

w/ Unit Size (AC/EC)

20-30

/24-36 Ton

40 & 50

/48 & 59 Ton

60/73 Ton 19'-10 5/16" 2'-5" 6 1/16" Note 1 4'-5 3/8" 4'-2 1/2” 5 13/16" 7'-8 3/16" 4'-5” 5 13/16" 26 7/16”

70-75

/80-89 Ton

A B C D

16'-3 3/16" 2'-2 1/2" 5 13/16" 5'-7" 3'-4 3/8" 2'-9 15/16” 5 13/16" 6'-6 15/16" 3' 5 13/16" 28 5/8”

19'-10 5/16" 2'-5" 7 1/16" 5'-7" 3'-4 3/8" 3'-1 1/2” 5 13/16" 7'-8 3/16" 3'-4” 5 13/16" 32 15/16”

19'-10 5/16" 2'-5" 6 1/16" Note 1 4'-5 3/8" 4'-2 1/2” 5 13/16" 7'-8 3/16" 4'-5” 5 13/16" 26 7/16”

exhaust

fan

return fan

exhaust

HJKL

20-30

/24-36 Ton

40 & 50

/48 & 59 Ton

60/73 Ton 18'-11 11/16" Note 2 8 3/16" 9 1/16"

70-75

/80-89 Ton

Notes:

1. 5'-5 15/16” for SEHL units or 7'-8 1/2” for SFHL, SLHL, SSHL, SXHL units.

2. 20'-1 3/4” for SFHL “High Heat” units or 20'-6 3/4” for SFHL “Low Heat” units. Either is selectable in field for SL and SS Return.

15'-5 5/16" 16'-9 3/4" 8 13/16" 9 1/16"

18'-11 11/16" Note 2 8 3/16" 9 1/16"

G F

return

fan

exhaust

fan

return

fan

30 RT-SVX36K-EN

Page 31

Figure 16. Evaporative condenser water connection locations

Installation

Drain Connection 1 1/4” PVC, Female

Tons

(EC)

24, 29 & 36 Ton 5’ 6'-7 5/16" 12" 12 15/16"

48 & 59 Ton 6'-10 7/8" 8'-6 1/8" 12” 12 15/16"

73, 80 & 89 Ton 6'-6 9/16" 8'-6 1/8" 23 11/16" 24 5/8"

Drain Connection Inlet Water Connection

A B C D

Water Supply Connection 3/4” PVC, Female

19 13/16"

8 3/16"

RT-SVX36K-EN 31

Page 32

Installation

Unit Size

(AC/EC)

20, 25 & 30 Ton 8 7/32" 6 31/32" 15 21/32" 13 21/32" 9 17/32" 8 1/2" 18 1/16" 19 9/16"

40-75 / 24-89 Ton 8 15/16” 7 15/16” 17 7/8" 15 7/8" 9 29/32" 10 3/16” 20 13/32" 22 5/32"

Dimensions

F G H J K L M N

Unit Size Dimensions (Note)

(AC/EC) Furnace Size/MBH Length Height

20 & 25, 24 & 29 Ton

30, 36 Ton

40, 48 Ton

50-75, 59-89 Ton

Note: The length dimension is from the exhaust end of the unit. The height dimension is from the bottom of the unit base rail.

Low = 235 195-5/32" 9-5/32"

High = 500 195-5/32" 9-5/32"

Low = 350 195-5/32" 9-5/32"

High = 500 195-5/32" 9-5/32"

Low = 350 240-1/8" 9-5/32"

High = 850 231-1/8" 9-5/32"

Low = 500 240-1/8" 9-5/32"

High = 850 231-1/8" 9-5/32"

32 RT-SVX36K-EN

Page 33

Figure 17. S_HK cooling and heating units (90-130 ton)

14’ - 1/4”

20’ - 2 1/2”

19’ - 3/8”

Installation

(See CPVC Dimensional Table)

RT-SVX36K-EN 33

Page 34

Installation

Figure 18. Center of gravity data

Table 12. Center of gravity data

Units without 100% Exhaust/Return Fan

Unit Model Unit Size

20 13’ 6” 4’ 10” 13’ 10” 4’ 9” 12’ 4” 4’ 10” 25 14’ 6” 4’ 10” 13’ 11” 4’ 9” 12’ 4” 4’ 10” 30 13’ 11” 4’ 10” 12’ 1” 4’ 9” 12’-8” 4’ 10”

SAHL

SEHL, SLHL,

SSHL, SXHL

SFHL

SXHK,SEHK,

SLHK,SSHK

SFHK

SXHK, SEHK,

SLHK, SSHK

SFHK

Note: Dimensions shown for the center-of-gravity are approximate and are based on a unit equipped with: Standard coils, FC Fans, 100% economizer,

throwaway filters, 460 volt XL start, high capacity heat (as applicable).

40 17’ 4” 4’ 0” 16’ 2” 4’ 11” 16’ 7” 4’ 11” 50 18’ 6” 4’ 0” 16’ 4” 4’ 11” 16’ 9” 4’ 11” 55 18’ 6” 4’ 0” 16’ 5” 4’ 11” 16’ 9” 4’ 11” 60 17’ 0” 5’ 10” 16’ 9” 5’ 8” 15’ 2” 5’ 9” 70 17’ 0” 5’ 10” 16’ 10” 5’ 8” 15’ 3” 5’ 9” 75 18’ 6” 5’ 10” 16’ 4” 5’ 8” 16’ 9” 5’ 9” 20 15’ 8” 4’ 9” 14’ 0” 4’ 8” 13’ 5” 4’ 9” 25 15’ 8” 4’ 9” 14’ 0” 4’ 8” 13’ 6” 4’ 9” 30 14’ 1” 4’ 9” 13’ 3” 4’ 8” 13’ 8” 4’ 9” 40 18’ 4” 4’ 11” 17’ 2” 4’ 10” 17’ 6” 4’ 10” 50 19’ 1” 4’ 0” 18’ 11” 4’ 11” 17’ 2” 4’ 11” 55 19’ 1” 4’ 0” 18’ 11” 4’ 11” 17’ 3” 4’ 0” 60 18’ 6” 5’ 9” 17’ 2” 5’ 7” 17’ 6” 5’ 8” 70 18’ 3” 5’ 10” 17’ 11” 5’ 8” 16’ 4” 5’ 9” 75 19’ 2” 5’ 10” 18’ 10” 5’ 8” 17’ 2” 5’ 9” 20 15’ 9” 4’ 10” 14’ 1” 4’ 9” 14’ 7” 4’ 10” 25 15’ 10” 4’ 9” 14’ 2” 4’ 8” 14’ 7” 4’ 9” 30 14’ 2” 4’ 9” 13’ 4” 4’ 8” 13’ 10” 4’ 9” 40 19’ 6” 4’ 11” 17’ 4” 4’ 10” 17’ 9” 4’ 10” 50 19’ 1” 4’ 11” 18’ 0” 4’ 10” 17’ 4” 4’ 11” 55 19’ 2” 4’ 11” 18’ 0” 4’ 10” 17’ 4” 4’ 11” 60 19’ 7” 5’ 9” 17’ 4” 5’ 7” 17’ 8” 5’ 9” 70 18' 3” 5’ 9” 17’ 0” 5’ 7” 16’ 5” 5’ 8” 75 19’ 2” 5’ 9” 18’ 10” 5’ 7” 17’ 3” 5’ 9” 90 18’ 9” 5’ 10” 20’ 4” 6’ 2” 17’ 9” 5’ 10”

105 19’ 1” 5’ 11” 20’ 7” 6’ 2” 18’ 1” 6’ 0”

90 18’ 11” 6’ 0” 20’ 6” 6’ 3” 17’ 10” 5’ 11” 105 19’ 3” 6’ 0” 20’ 9” 6’ 4” 18’ 4” 6’ 7” 115 19’ 2” 5’ 10” 20’ 8” 6’ 2” 18’ 1” 6’ 0” 130 19’ 5” 5’ 10” 20’ 11” 6’ 2” 18’ 6” 6’ 0” 115 19’ 4” 6’ 0” 20’ 9” 6’ 3” 18’ 3" 6’ 1” 130 19’ 6” 6’ 0” 21’ 10” 6’ 3” 18’ 8” 6’ 0”

Dim. A Dim. B Dim. A Dim B. Dim. A Dim. B

Units with

Exhaust/Return Fan

Units with Supply &

Exhaust/Return VFD

34 RT-SVX36K-EN

Page 35

Installation

Table 13. Air-cooled condenser - approximate operating weights (Lbs./Kg)

Without Exhaust Fan With Exhaust Fan

Unit

105

115

130

Notes:

1. Weights shown for air-cooled units include the following features: FC fans, standard coils, 100% economizer, throw-away filters, maximum motor sizes 460V XL, high heat.

2. Weights shown represent approximate operating weights and have a ±5% accuracy. To calculate weight for a specific unit configuration, utilize TOPSS™ or contact the local Trane sales representative. ACTUAL WEIGHTS ARE STAMPED ON THE UNIT NAMEPLATE.

Lb 4092 4422 4712 4422 4312 4390 4720 5010 4720 4610 Kg 1856 2006 2137 2006 1956 1991 2141 2272 2141 2091 Lb 4181 4521 4791 4521 4391 4485 4825 5095 4825 4695 Kg 1896 2050 2173 2050 1992 2034 2188 2311 2188 2129 Lb 4572 4932 5202 4932 4812 5029 5389 5659 5389 5269 Kg 2074 2237 2359 2237 2183 2281 2444 2567 2444 2390 Lb 6433 6737 7217 6737 6577 7103 7407 7887 7407 7247 Kg 2918 3056 3273 3056 2983 3222 3360 3577 3360 3287 Lb 7175 7725 8185 7725 7555 7894 8444 8904 8444 8274 Kg 3255 3504 3713 3504 3427 3581 3830 4039 3830 3753 Lb 7425 7975 8455 7975 7815 8144 8694 9174 8694 8534 Kg 3368 3617 3835 3617 3545 3694 3944 4161 3944 3871 Lb 8338 8658 9118 8658 8498 9282 9602 10062 9602 9442 Kg 3782 3927 4136 3927 3855 4210 4355 4564 4355 4283 Lb 8604 8666 9146 8666 8516 9547 9609 10089 9609 9459 Kg 3903 3931 4148 3931 3863 4330 4358 4576 4358 4290 Lb 8843 9173 9653 9173 9023 9786 10116 10596 10116 9966 Kg 4011 4161 4379 4161 4093 4439 4589 4806 4589 4521

Lb. N/A 12649 12799 13439 12919 N/A 13989 14139 14779 14259

Kg N/A 5737 5805 6096 5860 N/A 6345 6413 6704 6468

Lb. N/A 13259 13409 14049 13529 N/A 14599 14749 15389 14869

Kg N/A 6014 6082 6372 6137 N/A 6622 6690 6980 6744

Lb. N/A 13449 13629 14289 13649 N/A 14789 14969 15629 14989

Kg N/A 6100 6182 6481 6191 N/A 6708 6790 7089 6799

Lb. N/A 13899 14059 14699 14089 N/A 15239 15399 16039 15429

Kg N/A 6304 6377 6667 6391 N/A 6912 6985 7275 6998

SA SX SE SF SL/SS SA SX SE SF SL/SS

RT-SVX36K-EN 35

Page 36

Installation

Table 14. Evaporative condenser - approximate operating weights (lbs/kg)

Without Exhaust Fan With Exhaust Fan

Unit SX SE SF SL/SS SX SE SF SL/SS

Notes:

1. Weights shown for evaporative condensing units include the following features: FC fans, high capacity evaporative coil. Add 520 lbs for 24, 29, 36, 48 and 59 units and 680 lbs for 73, 80 and 89 units for installed sump base water weight for evaporative condenser total operating weight.

2. Weights shown represent approximate operating weights and have a ±5% accuracy . To calculate weight for a specific unit configuration, utilize TOPSS or contact the local Trane sales representative. ACTUAL WEIGHTS ARE STAMPED ON THE UNIT NAMEPLATE.

lbs 6549 6679 6944 6763 6907 7037 7302 7121

kg 2971 3030 3150 3068 3133 3192 3312 3230

lbs 6599 6729 6994 6813 6963 7093 7358 7177

kg 2993 3052 3172 3090 3158 3217 3338 3255

lbs 7121 7251 7513 7335 7538 7668 7933 7752

kg 3230 3289 3409 3327 3419 3478 3598 3516

lbs 9001 9156 9631 9359 9585 9740 10215 9943

kg 4083 4153 4369 4245 4348 4418 4633 4510

lbs 9213 9368 9843 9571 9856 10011 10486 10214

kg 4179 4249 4465 4341 4471 4541 4756 4633

lbs 11303 11458 11933 11691 12128 12283 12758 12516

kg 5127 5197 5413 5303 5501 5571 5787 5677

lbs 11430 11585 12060 11818 12255 12410 12885 12643

kg 5185 5255 5470 5361 5559 5629 5845 5735

lbs 11820 11975 12450 12208 12645 12800 13275 13033

kg 5361 5432 5647 5537 5736 5806 6021 5912

Table 15. Roof curb max weight

Roof Curb Max. Weight

Unit

20/24

25/29

30/36

40/48

50/55/59

60/73

(a)Roof curb weights include the curb and pedestal.

SAHL S*HL SAHL S*HL

490 510 222 231 277 290 490 510 222 231 277 290 490 510 222 231 N/A 349 515 550 234 249 N/A 349 515 550 234 249 N/A 349 515 550 234 249 N/A 349

(a)

Trane Roof Curb and Ductwork

The roof curbs for 20 through 130Ton units consists of two

main components; a pedestal to support the unit’s condenser section and a “full perimeter” enclosure to support the unit’s air handler section.

Before installing any roof curb, verify;

1. That it is the correct curb for the unit,

2. That it includes the necessary gaskets and hardware,

Roof Curb Max. Weight

Unit

70/80

75/89

105

115

130

610 640

N/A 770

3. That the purposed installation location provides the required clearance for proper operation.

4. Insure that the curb is level and square.The top surface of the curb must be true to assure an adequate curb-tounit seal.

Step-by-step curb assembly and installation instructions ship with eachTrane accessory roof curb kit. Follow the instructions carefully to assure proper fit-up when the unit is set into place.

36 RT-SVX36K-EN

Page 37

Installation

Note: To assure proper condensate flow during

operation, the unit (and curb) must be as level as possible.The maximum slope allowable for rooftop unit applications, excluding SSH_'s, is 4" end-to-end and 2" side-to-side. Units with steam coils (SSH_'s) must be set level!

If the unit is elevated, a field constructed catwalk around the unit is strongly recommended to provide easy access for unit maintenance and service.

Recommendations for installing the Supply Air and Return Air ductwork joining the roof curb are included in the curb instruction booklet. Curb ductwork must be fabricated and installed by the installing contractor before the unit is set into place.

Note: For sound consideration, cut only the holes in the

roof deck for the ductwork penetrations. Do not cut out the entire roof deck within the curb perimeter.

Pitch Pocket Location

The location of the main supply power entry for S_HL 20

through 89Ton rooftop units is located at the bottom righthand corner of the control panel.

Figure 14 and Figure 15 illustrate the location for the

electrical entrance through the base in order to enter the control panel. If the power supply conduit penetrates the building’s roof beneath this opening, it is recommended

Figure 19. Pitch pocket location

that a pitch pocket be installed before the unit is placed onto the roof curb.

The center line dimensions shown in the illustration below

indicates the center line of the electrical access hole in the unit base when it is positioned on the curb, ±3/8 inch.The actual diameter of the hole in the roof should be at least 1/ 2 inch larger than the diameter of the conduit penetrating the roof.This will allow for the clearance variable between the roof curb rail and the unit base rail illustrated in

Figure 19.

The pitch pocket dimensions listed are recommended to

enhance the application of roofing pitch after the unit is set into place.The pitch pocket may need to be shifted as illustrated to prevent interference with the curb pedestal.

Table 16. Pitch pocket dimensions

Unit Tonnage “A” Dimension "B" Dimension

S*HL 20, 25 & 30 4' 5-9/16" 5-9/16" S*HL 24, 29, & 36 6' 9-11/16” 5-1/2” S*HL 40 - 89 9' 5-11/16" 5-1/2"

* = All unit functions (SAHL, SEHL, SFHL, SSHL, SLHL and SXHL)

Notes: For design special evaporative-cooled condensing units, please

see the curb installers guide for proper pitch pocket locations.

If a Trane Curb Accessory Kit is Not Used:

a. The ductwork can be attached directly to the

factory-provided flanges around the unit’s supply and return air openings. Be sure to use flexible duct connections at the unit.

b. For “built-up” curbs supplied by others, gaskets

must be installed around the curb perimeter flange and the supply and return air opening flanges.

Notes:

RT-SVX36K-EN 37

• If a “built-up” curb is provided by others, keep in mind that these commercial rooftop units do not have base pans in the condenser section.

• If this is a REPLACEMENT UNIT keep in mind that the CURRENT DESIGN commercial rooftop units do not have base pans in the condenser section.

• Trane roof curbs are recommended. If using a non-

Trane roof curb with right-angle return airflow

approaches to a return fan inlet, a rigid, solid flow baffle wall should be installed across the full width of the roof curb return airflow path in the position shown in Figure 20, p. 38 to reduce potential airflow

Page 38

Installation

disturbances at the return fan inlet that could contribute to unusual return fan noise.

• If a full perimeter curb is used, make sure the IRU

option was added to the unit to ensure stability in the condenser section

Figure 20. Solid flow baffle wall installation for non-

Trane roof curbs

Return Fan

Roof Curb

Flow Baffle

Return Airflow

Return Airflow Duct

3. Test-lift the unit to ensure it is properly rigged and balanced, make any necessary rigging adjustments.

4. Lift the unit and position it over the curb and pedestal. (These units have a continuous base rail around the air handler section which matches the curb.

5. Align the base rail of the unit’s air handler section with the curb rail while lowering the unit onto the curb. Make sure that the gasket on the curb is not damaged while positioning the unit. (The pedestal simply supports the unit’s condenser section)

A cross section of the juncture between the unit and the

roof curb is shown in Figure 22, p. 39.

Unit Rigging & Placement

WARNING

Heavy Objects!

Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. Other lifting arrangements could cause equipment or property damage. Failure to follow instructions above or properly lift unit could result in unit dropping and possibly crushing operator/ technician which could result in death or serious injury.

Note: Use spreader bars as shown in the diagram. Refer

to the Installation manual or nameplate for the unit weight. Refer to the Installation Instructions located inside the side control panel for further rigging information.

1. A Center-of-Gravity illustration and the dimensional data is shown in Figure 18, p. 34 and Table 12, p. 34.

2. Attach adequate strength lifting slings to all four lifting lugs on 20 through 75Ton units. The minimum distance between the lifting hook and the top of the unit should be 7 feet for 20 through 75Ton units.

Figure 21, p. 39 illustrates the installation of spreader

bars to protect the unit and to facilitate a uniform lift.

Table 13, p. 35 lists the typical unit operating weights.

38 RT-SVX36K-EN

Page 39

Figure 21. Unit rigging

Installation

Figure 22. Typical unit base and roof curb cross section

RT-SVX36K-EN 39

Page 40

Installation

General Unit Requirements

WARNING

Live Electrical Components!

During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

The checklist listed below is a summary of the steps

required to successfully install a Commercial rooftop unit.

This checklist is intended to acquaint the installing

personnel with what is required in the installation process. It does not replace the detailed instructions called out in the applicable sections of this manual.

• Check the unit for shipping damage and material shortage; file a freight claim and notifyTrane office.

• Verify that the installation location of the unit will provide the required clearance for proper operation.

• Assemble and install the roof curb per the current edition of the curb installation guide.

• Fabricate and install ductwork; secure ductwork to curb.

• Install pitch pocket for power supply through building roof. (If applicable)

• Rigging the unit.

• Set the unit onto the curb; check for levelness.

• Ensure unit-to-curb seal is tight and without buckles or cracks.

• Install and connect condensate drain lines to each evaporator drain connection.

• Remove the shipping hold-down bolts and shipping channels from the supply and exhaust/return fans with rubber or spring isolators.

• Check all optional supply and exhaust/return fan spring isolators for proper adjustment.

• Verify all discharge and liquid line service valves (one per circuit) are back seated.

Main Electrical Power Requirements

• Verify that the power supply complies with the unit nameplate specifications.

• Inspect all control panel components; tighten any loose connections.

• Connect properly sized and protected power supply wiring to a field-supplied/installed disconnect and unit

• Properly ground the unit.

Note: All field-installed wiring must comply with NEC

and applicable local codes.

Field Installed Control Wiring

• Complete the field wiring connections for the constant volume controls as applicable. Refer to “Field Installed Control Wiring” for guidelines.

• Complete the field wiring connections for the variable air volume controls as applicable. Refer to “Field Installed Control Wiring” for guidelines.

Note: All field-installed wiring must comply with NEC

and applicable local codes.

Requirements for Electric Heat Units

All SEHL and SEHK Units (380 minimum

voltage).

• Verify that the power supply complies with the electric heater specifications on the unit and heater nameplate.

• Inspect the heater junction box and control panel; tighten any loose connections.

• Check electric heat circuits for continuity.

SEHL Units w/200V or 230V Electric Heat: (Requires Separate Power Supply to Heater)

• Connect properly sized and protected power supply wiring for the electric heat from a dedicated, fieldsupplied/installed disconnect to terminal block 4TB2, or to an optional unit mounted disconnect switch 4S15.

Requirements for Gas Heat (SFH_)

• Gas supply line properly sized and connected to the unit gas train.

• All gas piping joints properly sealed.

• Drip leg Installed in the gas piping near the unit.

• Gas piping leak checked with a soap solution. If piping connections to the unit are complete, do not pressurize piping in excess of 0.50 psig or 14 inches w.c. to prevent component failure.

• Main supply gas pressure adequate.

• FlueTubes clear of any obstructions.

• Factory-supplied flue assembly installed on the unit.

• Connect the 3/4” CPVC furnace drain stubout to a proper condensate drain.

Requirements for Hot Water Heat (SLH_)

• Route properly sized water piping through the base of the unit into the heating section.

• Install the factory-supplied, 3-way modulating valve.

• Complete the valve actuator wiring.

40 RT-SVX36K-EN

Page 41

Installation

Requirements for Steam Heat (SSH_)

• Install an automatic air vent at the top of the return water coil header.

• Route properly sized steam piping through the base of the unit into the heating section.

• Install the factory-supplied, 2-way modulating valve

• Complete the valve actuator wiring.

• Install 1/2”, 15-degree swing-check vacuum breaker(s) at the top of each coil section. Vent breaker(s) to the atmosphere or merge with return main at discharge side of steam trap.

• Position the steam trap discharge at least 12" below the outlet connection on the coil.

• Use float and thermostatic traps in the system, as required by the application.

O/A Pressure Sensor and Tubing Installation (All units with Statitrac or Return Fans)

• O/A pressure sensor mounted to the roof bracket.

• Factory supplied pneumatic tubing installed between the O/A pressure sensor and the connector on the vertical support.

• Field supplied pneumatic tubing connected to the proper fitting on the space pressure transducer located in the filter section, and the other end routed to a suitable sensing location within the controlled space (Statitrac only).

Figure 23. Condensate drain locations

Requirements for Modulating Reheat Dehumidification (S_HL)

• Install (5U108) humidity sensor in space or return duct

• Complete field wiring of humidity sensor to ECEM (1TB16). Refer to “Field Installed Control wiring” for guidelines.

Condensate Drain Connections

Each S_HL and S_HK unit is provided with 1" evaporator condensate drain connections (two on each side of the unit for FC supply fans and one on eachside of the unit for DDP supply fans).

Due to the size of these units, all condensate drain connections must be connected to the evaporator drain connections. Refer to the appropriate illustration in

Figure 14 and Figure 15 for the location of these drain

connections.

Condensate traps must be installed because drain connections are in a negative pressure environment. Install the P-Traps at the unit using the guidelines in

Figure 24.

Pitch the drain lines at least 1/2 inch for every 10 feet of horizontal run to assure proper condensate flow. Do not allow the horizontal run to sag causing a possible doubletrap condition which could result in condensate backup due to “air lock”.

RT-SVX36K-EN 41

Condensate drain openings both sides

Note: Each drain pan connection must be trapped. The drains may be trapped individually or connected and then trapped.

Page 42

Installation

Units with Gas Furnace

Units equipped with a gas furnace have a 3/4” CPVC drain connection stubbed out through the vertical support in the gas heat section. It is extremely important that the condensate be piped to a proper drain. Refer to the appropriate illustration in Figure 14 and Figure 15 for the location of the drain connection.

Note: Units equipped with an optional modulating gas

furnace will likely operate in a condensing mode part of the time.

An additional 1-1/4” non-connectable water drain is located in the base rail within the heating section.

Ensure that all condensate drain line installations comply with applicable building and waste disposal codes.

Figure 24. Condensate trap installation

4. Verify that the fan assembly is being supported by the isolators.

Spring Isolators: See Figure 26, Figure 28, Figure 27

and Figure 29 for spring isolator locations.

1. Remove and discard the shipping tie down bolts.

2. Remove the shipping channels and discard.

Note: Fan assemblies not equipped with rubber or spring

isolators have mounting bolts at the same locations and must not be removed.

Note: If return fan backside spring isolator repair/

replacement is required, access the backside of the return fan by entering the unit filter section. Remove the top pivot bearings from the three fixed- position return damper blades (bolted together as a single section with an angle brace). Lift the three-blade section as a single unit from the return damper assembly and set aside or lean in against the return fan frame.Then enter the return fan compartment from the filter section to perform service work on the rear isolators.

Optional DDP Supply Fan Shipping Channel Removal and Isolator Spring

Adjustment

Removing Supply and Exhaust/Return Fan Shipping Channels (Motors >5Hp)

Each FC supply fan assembly and exhaust fan assembly for S_HL units shipped with a motor larger than 5 HP is equipped with rubber isolators (as standard) or optional spring isolators. Each DDP supply fan assembly for SAHF and SXHL units is equipped with spring isolators. Each return fan assembly for S_HL units shipped with a motor larger than 5 HP is equipped with spring isolators. Shipping channels are installed beneath each fan assembly and must be removed.To locate and remove these channels, refer to Figure 26 and Figure 28, and use the following procedures:

Rubber Isolators:

1. Remove and discard the shipping bolts from the fan assembly rails.

2. Elevate the fan-and-motor assembly and slide the shipping channels out from between the fan assembly rails and the unit's base rail.

3. Lower the fan-and-motor assembly onto the isolators. Make sure that the pins at the top of the isolators are engaged in the corresponding holes on the fan assembly.

ShippingTie Down and Isolator Spring AdjustmentRemove shipping tie down bolt and washer (4 - 20 to 30 ton,6-40to55ton,8-60to75ton). Leave shipping channels in place. Verify spring height is 0.1" to 0.2" above shipping channel. Spring height is factory set but verify and adjust as needed by: 1) Back off ALL spring isolator jam nuts (4) at top of assembly (adjusting one spring effects all others) 2)Turn adjustment bolt (make small adjustments, again each change effects all other springs. Clockwise raises, Counter clockwise lowers).

When correctly adjusted re-tighten jam nuts and remove

shipping channels. Do Not Remove electrical ground wire strap between isolation base and unit base.

42 RT-SVX36K-EN

Page 43

Figure 25. DDP shipping channel removal, isolator spring adjustment

Figure 26. Removing supply and exhaust fan assembly shipping hardware (20-89 Ton)

Installation

RT-SVX36K-EN 43

Page 44

Installation

Figure 27. Removing supply and exhaust fan assembly shipping hardware (90-130 Ton)

Figure 28. Removing return fan assembly shipping hardware (20-89 Ton)

44 RT-SVX36K-EN

Page 45

Installation

O/A Sensor & Tubing Installation

An Outside Air Pressure Sensor is shipped with all units designed to operate on variable air volume applications, units equipped with a return fan, or constant volume units with 100% modulating exhaust w/Statitrac.

On VAV systems, a duct pressure transducer (3U60) and the outside air sensor is used to control the discharge duct static pressure to within a customer-specified parameter.

On CV & VAV units equipped with 100% modulating exhaust w/Statitrac, a space pressure transducer (3U62) and the outside air sensor is used to control the exhaust fan and dampers to relieve static pressure to within a customer-specified parameter within the controlled space.

On units equipped with a return fan, a return pressure transducer (3U106) is connected to the O/A sensor for comparison with return plenum pressure.

Refer to Figure 29, p. 47 and the following steps to install the sensor and the pneumatic tubing.

1. Remove the O/A pressure sensor kit located inside the filter section.The kit contains the following items;

• O/A static pressure sensor with sensor mounting

• Bracket

• 50' of 3/16” O.D. pneumatic tubing

• Mounting hardware

2. Using two #10-32 x 1-3/4” screws provided, install the sensor's mounting bracket to the factory installed bracket (near the filter section).

3. Using the #10-32 x 1/2” screws provided, install the O/

A static pressure sensor vertically to the sensor

bracket.

4. Remove the dust cap from the tubing connector located below the sensor in the vertical support.

5. Attach one end of the 3/16” O.D. factory provided pneumatic tubing to the sensor's top port, and the other end of the tubing to the connector in the vertical support. Note that most of the tubing is not needed. Discard any excess tubing.

Units with Statitrac:

6. Open the filter access door, and locate the pressure transducer mounting plate illustrated in Figure 29.

There are three tube connectors mounted on the left of

the solenoid and transducers. Connect one end of the field provided 3/16” O.D. pneumatic tubing for the space pressurization control to the bottom fitting. Route the opposite end of the tubing to a suitable location inside the building.This location should be the largest open area that will not be affected by sudden static pressure changes.

Remove Evaporative Condenser Fan Shipping Brackets

To remove shipping brackets

Important: Remove fan shipping brackets before

startup. Failure to remove brackets could result in fan damage.

Evaporative condensers are shipped with fan shipping brackets to reduce damage caused by vibration during shipment.The fan shipping brackets must be removed prior to unit startup.To remove the shipping brackets start from the side opposite to the drain actuator (see Figure 85,

p. 131):

1. Loosen the screw for the bracket that holds the inlet louvers below the door side.

2. Remove inlet louvers and set to the side.

Note: Service technician may need to step on the

horizontal surface of FRP coated base. Step with care.

3. Unscrew the bolt in the middle of the door. Keep the bolt in a safe place.

4. Lift one door with handle until it touches the top. Swivel bottom of door to remove it from the door opening and set it to the side.

5. Slide and remove the middle mist eliminator section so that the shipping bracket is visible.

6. Use screw gun to unscrew the two screws that hold the fan shipping bracket.The bracket should drop down but still remain engaged with a hook on the bracket.

7. Go to the other side of the unit and follow the procedure for inlet louver and door removal (see steps 1 - 6).

8. Hold the bracket with one hand and remove remaining two screws.

9. Remove the bracket and all the removed screws from the unit.

Important: Make sure there are no screws remaining in

the coil area.

10. Reinstall inlet louvers, mist eliminators and louvers.

Check that the direction of arrow on the inlet louver is correct.

Evaporative Condenser Make-upWater and Drain Line Installation

Make-upWater and Drain Lines

Water Supply Source

The supply line should be designed to provide a minimum

supply of water within customary domestic supply pressures, 35 to 60 psig; dynamic pressure (measured with the valve open) which will allow approximately 30 GPM to enter the sump through the makeup water valve, when the sump is empty.The unit uses about 2-4 GPM.

Attach a hand valve at the inlet for use during inspection

and maintenance; an inlet strainer is recommended as well.

RT-SVX36K-EN 45

Page 46

Installation

Make-up water inlet connection is a ¾” PVC slip connector. Care must be taken to ensure the water line upstream of the water solenoid valve will not freeze. Insulating the line and utilizing heat tape is recommended if ambient temperatures below 32° F are expected.

Water Quality

Overall performance of any water-cooled device can be affected by suspended particulates, mineral concentration, trash and debris resulting in clogging and heat transfer loss.The evaporative-cooled condenser is designed to greatly minimize problems with these impurities.

However, float valves and solenoid valves are used to control the incoming water. If the incoming water contains contaminants, sand or other objects, an incoming line strainer with a 80 to 100 mesh screen is required.The inlet line should be flushed prior to connection to the unit, whether or not there is a strainer.

Note: Backflow preventer to be field provided and

installed by others.

Water Drain Schedule 80 PVC pipe of 1¼” is normally

adequate for sump water drain. Periodically, the sump is emptied and flushed to eliminate accumulated dirt, debris, and minerals.

Concentration of these foreign substances will increase as the system operates.The evaporative process releases essentially pure water vapor into the atmosphere, leaving the impurities behind that accumulate in the sump.

Although these impurities are present in the original make-up water, their concentration will be higher in the sump discharge. Care and judgment should be exercised when selecting a discharge site.

water. Operation can be extended to 10 deg by providing an optional sump heater.

Drain Valve

The drain valve is shipped to “drain during power loss

conditions”. If “hold during power loss conditions” is desired, refer to “Evaporative Condenser Drain Valve Setup” on page 89.

Local Site Discharge

Rooftop or simple storm sewer discharge is generally acceptable. Do not routinely direct the sump discharge onto an area where these higher concentrations will adversely affect that area, i.e. continued sump discharge into a flower bed for example, where the input water contains CaCO3 (lime) will eventually decrease the pH of the soil.

Sewer Discharge

The quantities of mineral and debris flushed are actually

very small, and do not cause problems when diluted in normal sewer flow. However, local, state or federal standards and restrictions must be followed in any given locality

Make Up Water Solenoid Valve

This valve is controlled by the UCM based on water level

in the sump, as well as whether a call for mechanical cooling exists.

During low ambient temperatures, the solenoid valve will be de-energized preventing water from further filling sump.The sump drain valve opens to empty sump of

46 RT-SVX36K-EN

Page 47

Figure 29. Pressure sensing

Outside Air Sensing Kit

Duct, Space and Return Plenum Pressure Transducer Tubing Schematic

Return Plenum Transducer

Sensing Tube to Return Plenum

Installation

Duct and Space Static Pressure Control Component Layout

Space Static Transducer (3U62)

Static Reference Tubing Connects Here

Discharge Duct Static Tubing Connects Here

Space Pressure Sensing Tube Connects Here

Space Pressure Calibration Solenoid (3L21)

Supply Air Duct Static Transducer (3U60)

Return Fan Plenum Pressure Control Component Layout

If equipped with Return Fan and Statitrac, Statitrac Static Reference Tubing connects here

Static Reference Tubing Connects Here (O/A Sensor)

Return Plenum Sensing Tube Connects Here

Return Plenum Calibration Solenoid (3L24)

Return Plenum Transducer (3U106)

RT-SVX36K-EN 47

Page 48

Installation

Gas Heat Units (SFH_)

All internal gas piping is factory-installed and pressure leak-tested before shipment. Once the unit is set into place, the gas supply line must be field-connected to the elbow located inside the gas heat control compartments.

WARNING

Hazardous Gases and Flammable Vapors!

Exposure to hazardous gases from fuel substances have been shown to cause cancer, birth defects or other reproductive harm. Improper installation, adjustment, alteration, service or use of this product could cause flammable mixtures.To avoid hazardous gases and flammable vapors follow proper installation and set up of this product and all warnings as provided in this manual. Failure to follow all instructions could result in death or serious injury.

When using dry nitrogen cylinders for pressurizing

units for leak testing, always provide a pressure regulator on the cylinder to prevent excessively high unit pressures. Never pressurize unit above the maximum recommended unit test pressure as specified in applicable unit literature. Failure to properly regulate pressure could result in a violent explosion, which could result in death or serious injury or equipment or property-only-damage.

Access holes are provided on the unit as illustrated in

Figure 15, p. 29 to accommodate a side or bottom pipe

entry on 20 through 89Ton units and in Figure 17, p. 33 on 90-130Ton units. Following the guidelines listed below will enhance both the installation and operation of the furnace.

Note: In the absence of local codes, the installation must

conform with the American National Standard Z223-1a of the National Fuel Gas Code, (latest edition).

1. To assure sufficient gas pressure at the unit, use

Table 24, p. 61 as a guide to determine the appropriate

gas pipe size for the unit heating capacity listed on the unit's nameplate.

2. If a gas line already exists, verify that it is sized large enough to handle the additional furnace capacity before connecting to it.

3. Take all branch piping from any main gas line from the top at 90 degrees or at 45 degrees to prevent moisture from being drawn in with the gas.

4. Ensure that all piping connections are adequately coated with joint sealant and properly tightened. Use a piping compound that is resistant to liquid petroleum gases.

5. Provide a drip leg near the unit.

6. Install a pressure regulator at the unit that is adequate to maintain 7" w.c. for natural gas while the furnace is operating at full capacity.

Note: Gas pressure in excess of 14" w.c. or 0.5 psig will

damage the gas train.

Failure to use a pressure regulating device will result in incorrect gas pressure. This can cause erratic operation due to gas pressure fluctuations as well as damage the gas valve. Over sizing the regulator will cause irregular pulsating flame patterns, burner rumble, potential flame outages, and possible gas valve damage.

If a single pressure regulator serves more than one rooftop unit, it must be sized to ensure that the inlet gas pressure does not fall below 7" w.c. with all the furnaces operating at full capacity.The gas pressure must not exceed 14" w.c. when the furnaces are off.

7. Provide adequate support for all field installed gas piping to avoid stressing the gas train and controls.

8. Leak test the gas supply line using a soap-and-water solution or equivalent before connecting it to the gas train.

9. Check the supply pressure before connecting it to the unit to prevent possible gas valve damage and the unsafe operating conditions that will result.

Note: Do not rely on the gas train shutoff valves to isolate

the unit while conducting gas pressure/leak test.

These valves are not designed to withstand

pressures in excess of 14" w.c. or 0.5 psig.

Connecting the Gas Supply Line to the Furnace Gas Train

Follow the steps below to complete the installation between the supply gas line and the furnace. Refer to

Figure 30 through Figure 33 for the appropriate gas train

configuration.

1. Connect the supply gas piping using a “ground-joint” type union to the furnace gas train and check for leaks.

2. Adjust the inlet supply pressure to the recommended 7" to 14" w.c. parameter for natural gas.

3. Ensure that the piping is adequately supported to avoid gas train stress.

Table 17. Specific gravity multipliers

Specific Gravity Multiplier

0.50 1.10

0.55 1.04

0.60 1.00

0.65 0.96

48 RT-SVX36K-EN

Page 49

Table 18. Sizing natural gas pipe mains and branches

Gas Input (Cubic Feet/Hour)*

Gas Supply Pipe Run (ft)

10 1050 1600 3050 4800 8500 17500 20 730 1100 2100 3300 5900 12000 30 590 890 1650 2700 4700 9700 40 500 760 1450 2300 4100 8300 50 440 670 1270 2000 3600 7400 60 400 610 1150 1850 3250 6800 70 370 560 1050 1700 3000 6200 80 350 530 990 1600 2800 5800

90 320 490 930 1500 2600 5400 100 305 460 870 1400 2500 5100 125 275 410 780 1250 2200 4500 150 250 380 710 1130 2000 4100 175 225 350 650 1050 1850 3800 200 210 320 610 980 1700 3500

* Table is based on a specific gravity of 0.60. Use Table 23 for the specific

gravity of the local gas supply.

1-¼"

Pipe

1-½"

Pipe

2-½"

Pipe

Installation

Table 19. Modulating gas heat settings

Natural Gas

Full Modulation Partial Modulation Gas Valve Settings

Air Damper

Actuator Voltage

Heater Size (MBH) Gas Orifice

500 #21 7 - 10 7 - 9.7 2.3 -1 850 #H 6 - 10 6 - 8.7 1.3 -1

1000 #N 5 - 10 5 - 8.7 0.9 0

Range (VDC)

Full Modulation Partial Modulation Gas Valve Settings

Air Damper

Actuator Voltage

Heater Size (MBH) Gas Orifice

500 #34 / #53 7 - 10 7 - 9.7 6 1 850 #32 6 - 10 6 - 8.7 3.2 1

1000 #29 5 - 10 5 - 8.7 1.9 0

Note: Valve actuator settings are approximate and may require “fine tuning” to properly set. Right (fine) settings given are in notches from the “zero”

midpoint location on sight gage.

Range (VDC)

Air Damper

Actuator Voltage

Range (VDC)

Air Damper

Actuator Voltage

Range (VDC)

Left Setting

Pgas/ Pair

Left Setting

Pgas/ Pair

Right Setting

(Low fire bias)

Right Setting

(Low fire bias)

RT-SVX36K-EN 49

Page 50

Installation

Table 20. Gas heating capacity altitude correction factors

Altitude (Ft.)

Sea Level - 2000 2001 - 2500 2501 - 3500 3501 - 4500 4501 - 5500 5501 - 6500 6501 - 7500

Capacity

Multiplier

Note: Correction factors are per AGA Std. 221.30 - 1964, Part VI, 6.12. Local codes may supersede.

Notes:

1. If more than one unit is served by the same main gas supply, consider the total gas input (cubic feet/hr.) and the total length when determining the appropriate gas pipe size.

2. Obtain the Specific Gravity and BTU/Cu.Ft. from the gas company.

3. The following example demonstrates the considerations necessary when determining the actual pipe size.

Example: A 40' pipe run is needed to connect a unit with a 500 MBH furnace to a natural gas supply having a rating of 1,000 BTU/Cu.Ft. and a specific gravity of 0.60 Cu.Ft/Hour = Furnace MBH Input

Gas BTU/Cu.Ft. X Multiplier (Table 23)

4. Table 24 indicates that a 1-1/4” pipe is required.

Cu.Ft/Hour = 500

Figure 30. Unit gas trains (natural gas) 235, 350 MBH

1.00 .92 .88 .84 .80 .76 .72

Figure 31. Unit gas trains (natural gas) 500, 850 MBH

50 RT-SVX36K-EN

Page 51

Installation

Burner Nozzle

Pilot Shutoff Valve

Pilot Solenoid Valve

Pilot Regulator Valve

Pilot Shutoff Valve

Modulating Gas Valve

Shutoff Valve

Figure 32. Unit gas trains (natural gas) 1000 MBH

Figure 33. Modulating 500 - 1000 MBH

5. Butt both flue tube sections together and center the pipe clamp over joint.

6. Using the pre-punch holes in the flue assembly, extension, and the vertical support, install the appropriate number of mounting brackets. Refer to

Figure 34 for details.

Figure 34. Flue Assembly

Modulating Gas Valve

Pilot Shutoff Valve

Shutoff Valve

Burner Nozzle

Pilot Solenoid Valve

Pilot Regulator Valve

Pilot Shutoff Valve

Flue Assembly Installation

1. Locate the flue assembly and the extension (refer to

Figure 34 for extension usage) in the ship with section

of the unit.

2. Install the flue extension onto the flue assembly as shown in Figure 34.

3. Slide the pipe clamp onto the heater flue tube located inside the heater compartment.

4. Insert the tube on the flue assembly into the hole located in the vertical support for the heat section.

Hot Water Heat Units (SLH_)

Hot water heating coils are factory installed inside the heater section of the unit. Once the unit is set into place, the hot water piping and the factory provided three way modulating valve must be installed.The valve can be installed inside the heat section or near the unit. If the valve is installed in a remote location, use field supplied wiring to extend the control wires from the heater section to the valve.Two access holes are provided in the unit base as illustrated in Figure 15, p. 29.

Following the guidelines listed below will enhance both the installation and operation of the “wet heat” system.

Figure 35, p. 53 and Figure 37, p. 54 illustrate the

recommended piping configuration for the hot water coil.

Table 27, p. 62 lists the coil connection sizes.

Note: The valve actuators are not waterproof. Failure to

protect the valve from moisture may result in the loss of heating control.

1. Support all field-installed piping independently from the heating coil.

2. Use swing joints or flexible connectors adjacent to the heating coil. (These devices will absorb the strains of expansion and contraction).

3. All return lines and fittings must be equal to the diameter of the “outlet” connection on the hot water coil.

RT-SVX36K-EN 51

Page 52

Installation

4. Install a “Gate” type valve in the supply branch line as close as possible to the hot water main and upstream of any other device or takeoff.

5. Install a “Gate” type valve in the return branch line as close as possible to the return main and down stream of any other device.

6. Install a strainer in the hot water supply branch as shown in Figure 35 and Figure 44.

7. Install the 3-way valve in an upright position, piped for valve seating against the flow. Ensure that the valve's location lends itself to serviceability.

8. TheType “W” hot water coil used in SLHL units is selfventing only when the tube water velocity exceeds 1.5 feet per second (fps). If the tube velocity is less than 1.5 feet per second, either:

a. install an automatic air vent at the top of the return

header, using the tapped pipe connection;

or,

b. vent the coil from the top of the return header down

to the return piping. At the vent connection, size the return piping to provide sufficient water velocity.

9. Install a “Globe” type valve in the Bypass line as shown in Figure 35, p. 53 and Figure 44, p. 72.

Table 21. Connection sizes for hot water and steam

Unit Model and Size

SLH*-20 to 130 High or Low Heat 2-1/2" 2-1/2"

SSHL-20 to 36 High or Low Heat 3" 1-1/4"

SSHL-40 to 89

SSHK-90 to 130 Low Heat(c) 1-1/2” 1”

(a)Type W coils-with center offset headers-are used in SLH* units; Type

NS coils are used in SSH* units (b)See Digit 9 of the unit model number to determine the heating capacity. (c) SSH* - 40 to 89 Ton units have multiple headers.

coil

(a)

Coil Connections

Heat Section

Capacity

(c)

High Heat Low Heat 3" 1-1/2"

(b)

Supply Return

(diameter in

inches)

Steam Heat Units (SSH_)

Steam heating coils are factory installed inside the heater section of the unit. The coils are pitched, within the units, to provide the proper condensate flow from the coil.To maintain the designed degree of pitch for the coil, the unit must be level.

Once the unit is set into place, the steam piping and the factory provided two way modulating valve must be installed.The valve can be installed inside the heater section or near the unit. If the valve is installed in a remote location, use field supplied wiring to extend the control wires from the heater section to the valve.Two access holes are provided in the unit base as illustrated in

Figure 15, p. 29.

Following the guidelines listed below will enhance both the installation and operation of the “wet heat” system.

Figure 37, p. 54 and Figure 38, p. 54 illustrate the

recommended piping configurations for the steam coil.

Table 27, p. 62 lists the coil connection sizes.

Note: The valve actuators are not waterproof. Failure to

protect the valve from moisture may result in the loss of heating control.

1. Support all field-installed piping independently from the heating coil.

2. Use swing joints or flexible connectors adjacent to the heating coil. (These devices will absorb the strains of expansion and contraction.)

3. Install the 2-way valve in an upright position. Ensure that the valve's location lends itself to serviceability.

4. Pitch the supply and return steam piping downward 1" per 10' of run in the direction of flow.

5. All return lines and fittings must be equal to the diameter of the “outlet” connection on the steam coil(s). If the steam trap connection is smaller that the coil “outlet” diameter, reduce the pipe size between the strainer and the steam trap connections only.

6. Install a 1/2” 15 degree swing-check vacuum breaker at the top of the return coil header using the tapped pipe connection. Position the vacuum breaker as close to the coil as possible.

Note: Vacuum breakers should have extended lines from

the vent ports to the atmosphere or connect each vent line to the return pipe on the discharge side of the steam traps.

7. Install a “Gate” type valve in the supply branch line as close as possible to the steam main and upstream of any other device.

8. Install a “Gate” type valve in the return branch line as close as possible to the condensate return main and downstream of any other device.

9. Install a strainer as close as possible to the inlet of the control valve and steam trap(s).

10. Steam trap selection should be based on the maximum possible condensate flow and the recommended load factors.

11. Install a Float-and-Thermostatic (FT) type trap to maintain proper flow.They provide gravity drains and continuous discharge operation. FT type traps are required if the system includes either;

a. an atmospheric pressure/gravity condensate

return;

or,

b. a potentially low pressure steam supply.

12. Position the outlet or discharge port of the steam trap at least 12" below the outlet connection on the coil(s).

This will provide adequate hydrostatic head pressure

52 RT-SVX36K-EN

Page 53

to overcome the trap losses and assure complete condensate removal.

40 through 130 Ton units

Utilizes two steam coils stacked together.These two coils must be piped in a parallel arrangement. The steps listed below should be used in addition to the previous steps.

Figure 38 illustrates the recommended piping

configuration for the steam coils.

Figure 35. Hot water piping (20 - 75 Ton)

Installation

Figure 36. Hot water piping (90 - 130 Ton)

RT-SVX36K-EN 53

Page 54

Installation

Figure 37. Steam coil piping (20 - 36 Ton)

Figure 38. Steam coil piping (40 - 130 Ton)

54 RT-SVX36K-EN

Page 55

Disconnect Switch External Handle

(Factory Mounted Option)

Units ordered with the factory mounted disconnect switch comes equipped with an externally mounted handle.This allows the operator to disconnect power from the unit without having to open the control panel door.The handle locations and its three positions are shown below;

“ON” - Indicates that the disconnect switch is closed, allowing the main power supply to be applied at the unit.

“OFF” - Indicates that the disconnect switch is open, interrupting the main power supply to the unit controls.

“OPEN COVER/RESET” -Turning the handle to this position releases the handle from the disconnect switch, allowing the control panel door to be opened.

Once the door has been opened, it can be closed with the handle in any one of the three positions outlined above, provided it matches the disconnect switch position. See

Figure 39.

The handle can be locked in the “OFF” position. While

holding the handle in the “OFF” position, push the spring loaded thumb key, attached to the handle, into the base slot. Place the lock shackle between the handle and the thumb key.This will prevent it from springing out of position.

An overall layout of the field required power wiring is illustrated in Figure 40.To ensure the unit's supply power wiring is properly sized and installed, follow the guidelines outlined below.

Figure 39. Disconnect switch handle positions

Installation

WARNING

Live Electrical Components!

Verify that the power supply available is compatible with

the unit's nameplate rating for all components.The available power supply must be within 10% of the rated voltage stamped on the nameplate. Use only copper conductors to connect the 3-phase power supply to the unit.

CAUTION

Hot Surface!

Surface temperatures may exceed 300°F (150°C) on condensing unit and carbon tank. To avoid possible

skin burns, stay clear of these surfaces. If servicing is required allow surfaces to cool or wear protective gear. Failure to do so could result in minor to moderate injury.

NOTICE:

Use Copper Conductors Only!

Unit terminals are not designed to accept other types of conductors. Failure to use copper conductors could result in equipment damage.

Note: All field installed wiring must conform to NEC

guidelines as well as State and Local codes.

RT-SVX36K-EN 55

Electric Heat Units (SEH_)

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

SEHL (20 through 89 Ton) electric heat units operating on 200/230 volts require two power supplies as illustrated in

Figure 40. Unless the unit was ordered with the optional

factory mounted non-fused disconnect switches, two field-supplied disconnect switches must be installed.

The power wires for the electric heat is routed into the

electric heat control panel using the thru-the-base access provided in the heating section. Refer to the appropriate illustration in Figure 15, p. 29, (Unit Base layout and

Page 56

Installation

Electrical Entrance diagram), for dimensional data.

On 20-130 ton units operating on 460/575 volts, only one power entry is required, as illustrated in Figure 40.

Use the information provided in Table 22, p. 59 and the “Power Wire Sizing & Protection Device Equations”,to determine the appropriate wire size and Maximum Over current Protection for the heaters/unit.

Note: Each power supply must be protected from short

circuit and ground fault conditions.To comply with NEC, protection devices must be sized according to the “Maximum Over current Protection” (MOP) or

“Recommended Dual Element” (RDE) fuse size

data on the unit nameplate.

Provide grounding for the supply power circuit in the electric heat control box.

Main Unit Power Wiring

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

1S14, inside the unit control panel. Refer to the customer connection diagram that shipped with the unit for specific termination points.

3. Provide proper grounding for the unit in accordance with local and national codes.

Figure 43, p. 70 lists the field connection wire ranges for

both the main power terminal block 1TB1 and the optional main power disconnect switch 1S14. Table 22, p. 59 lists the component electrical data for 20 through 130 ton units.

The electrical service must be protected from over current

and short circuit conditions in accordance with NEC requirements. Protection devices must be sized according to the electrical data on the nameplate. Refer to the “Power

Wire Sizing & Protection Device Equations”, for

determining;

a. the appropriate electrical service wire size based on

“Minimum Circuit Ampacity” (MCA),

b. the “Maximum Over current Protection” (MOP)

device,

c. the “Recommended Dual Element fuse size” (RDE).

1. If the unit is not equipped with an optional factory installed non-fused disconnect switch, a field supplied disconnect switch must be installed at or near the unit in accordance with the National Electrical Code (NEC latest edition). Refer to the “Power Wire Sizing & Protection Device Equations” (DSS calculation), for determining the correct size.

2. Location for the electrical service entrance is illustrated in Figure 15, p. 29. Complete the unit's power wiring connections onto either the main terminal block 1TB1, or the factory mounted non-fused disconnect switch

56 RT-SVX36K-EN

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Figure 40. Typical field power wiring (20 - 89 Ton)

Installation

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Installation

Figure 41. Typical field power wiring (90 - 130 Ton)

Figure 42. Customer connection wire range

58 RT-SVX36K-EN

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Table 22. Compressor electrical service sizing data (20-130 ton)

200V 230V 460V 575V

Tonnage

20 Std 2 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0

20 Hi Eff 2 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0

25 Std

25 Hi Eff

30 Std 2 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0

30 Hi Eff

40 Std

40 Hi Eff 4 37.3 267.0 31.8 267.0 15.9 142.0 15.2 103.0

40 Vari Spd

50 Std 4 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0

50 Hi Cap & Hi Eff

50 Vari Spd

55 Std & Hi Eff 4 47.0 304.0 42.3 304.0 20.2 147.0 17.1 122.0

55 Vari Spd

60 Std

60 Hi Cap & Hi Eff 4 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0

60 Vari Spd

70 Std & Hi Eff 4 56.9 351.0 48.8 351.0 25.5 197.0 23.1 146.0

70 Vari Spd

75 Std

75 Hi Cap & Hi Eff

90 Std & Hi Cap 4 N/A N/A N/A N/A 37.2 215.0 29.8 175.0

105 Hi Cap

115 Std

130 Std 4 N/A N/A N/A N/A 45.0 260.0 36.0 210.0

(a)Variable Speed Compressor

No. of

Compressors RLA LRA RLA LRA RLA LRA RLA LRA

1 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0 1 47.0 304.0 41.0 304.0 20.2 147.0 17.1 122.0 1 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0 1 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0

1 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0 1 56.9 351.0 48.8 351.0 25.5 197.0 23.1 135.0 2 31.3 203.0 30.4 203.0 13.1 98.0 11.9 84.0 2 37.3 267.0 31.8 267.0 15.9 142.0 15.2 103.0

(a)

1 31.3 203.0 30.4 203.0 13.1 98.0 11.9 84.0 1 37.3 267.0 31.8 267.0 15.9 142.0 15.2 103.0

2 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0 2 47.0 304.0 42.3 304.0 20.2 147.0 17.1 122.0

1(a) 104.0 N/A 104.0 N/A 55.0 N/A 49.0 N/A

1 41.4 267.0 40.3 267.0 19.1 142.0 15.8 103.0 1 47.0 304.0 42.3 304.0 20.2 147.0 17.1 122.0

1(a) 104.0 N/A 104.0 N/A 55.0 N/A 49.0 N/A

1 47.0 304.0 42.3 304.0 20.2 147.0 17.1 122.0 1 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0 2 47.0 304.0 42.3 304.0 20.2 147.0 17.1 122.0 2 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0

1(a) 104.0 N/A 104.0 N/A 55.0 N/A 49.0 N/A

1 51.9 315.0 47.0 315.0 22.2 158.0 19.2 136.0 1 56.9 351.0 48.8 351.0 25.5 197.0 23.1 146.0

1(a) 104.0 N/A 104.0 N/A 55.0 N/A 49.0 N/A

1 60.5 320.0 52.0 320.0 25.4 160.0 20.3 135.0 1 83.9 485.0 74.5 485.0 37.2 215.0 29.8 175.0 2 60.5 320.0 52.0 320.0 25.4 160.0 20.3 135.0 2 83.9 485.0 74.5 485.0 37.2 215.0 29.8 175.0 2 60.5 320.0 52.0 320.0 25.4 160.0 20.3 135.0 2 83.9 485.0 74.5 485.0 37.2 215.0 29.8 175.0

2 N/A N/A N/A N/A 37.2 215.0 29.8 175.0 2 N/A N/A N/A N/A 45.0 260.0 36.0 210.0 2 N/A N/A N/A N/A 37.2 215.0 29.8 175.0 2 N/A N/A N/A N/A 45.0 260.0 36.0 210.0

80.0 N/A 80.0 N/A 40.0 N/A 39.0 N/A

Installation

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Installation

Table 23. Electrical service sizing data — motors — 20-130 tons

Nominal Voltage

200

Nominal

FLA

Tons

20 8.2 8.2 3.6 2.8 25 12.3 12.3 5.4 4.2 30 12.3 12.3 5.4 4.2 40 16.4 16.4 7.2 5.6

50, 55 24.6 24.6 10.8 8.4

60 24.6 24.6 10.8 8.4 70 24.6 24.6 10.8 8.4 75 24.6 24.6 10.8 8.4

90 N/A N/A 14.4 11.2 105 N/A N/A 18.0 14.0 115 N/A N/A 18.0 14.0 130 N/A N/A 21.6 16.8

Motor Horsepower Supply

3 11.0 8.6 4.3 3.8 5 15.3 13.2 6.6 5.4

7.5 22.2 18.8 9.4 7.8 10 29.5 25.2 12.6 10.1 15 40.7 35.4 17.7 15.1 20 56.1 49.4 24.7 19.6 25 70.5 62.0 31.0 24.5 30 85.5 73.2 36.6 29.2

(c)

40 50

(c)

N/A N/A 49.0 39.0 N/A N/A 60.5 48.0

Motor Horsepower Supply Fan Motor (6 pole)(a)

3 10.1 8.8 4.4 3.7 5 17.0 14.8 7.4 5.8

7.5 25.0 22.0 11.0 8.6 10 32.0 28.6 14.3 11.5 15 46.0 41.0 20.5 16.0 20 63.0 54.0 27.0 NA

(a)FLA is for individual motors by HP, not total unit supply fan HP. (b)Return fan motors are available in 3-20 Hp (c) 40 & 50 Hp motor available as standard in 460 & 575 volt only. (d)DDP fans selected under 1,700 RPM will have 6-pole motors

230 FLA

Air-Cooled Condenser Fan Motor

(a)

/Exhaust/Return Fan Motor

460 FLA

(b)

(4 pole)

(d)

575 FLA

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Table 24. Electrical service sizing data —electric heat module (electric heat units only) — 20-130 tons

Voltage

Installation

200

FLA

30 83.3 72.2 36.1 28.9 50 138.8 120.3 60.1 48.1 70 194.3 168.4 84.2 67.4

90 249.8 216.5 108.3 86.6 110 305.3 264.6 132.3 105.9 130 156.4 125.1 150 180.4 144.3 170 204.5 163.6 190 228.5 182.8

Note: Electric heat FLA are determined at 208, 240, 480 and 600 volts.

230 FLA

460 FLA

575 FLAModule kW

Table 25. Electrical service sizing data evaporative condenser - all tonnages (24-89 tons)

Condenser Fan Sump Pump Sump Heater

Qty HP FLA Qty HP FLA kW FLA

1 5.4 5.9 1 0.5 1.55 3 3.8

Table 26. Electrical service sizing data — control power transformer

heating and cooling modes — 20-130 tons

Nominal Tons

(Air-cooled/

Evaporative

condensing)

20,25,30/24,29,36 A,E,L,S,X 1 1 1 1

20,25,30/24,29,36 F 4 3 2 1 40,50,55,60/48,59,73 A,E,L,S,X 3 2 1 1 40,50,55,60/48,59,73 F 5 4 2 2

70,75/80,89 A,E,L,S,X 5 4 2 2

70,75/80,89 F 8 7 3 3 90,105,115,130 E,L,S,X 5 4 2 2 90,105,115,130 F 8 7 3 3

Digit 2

Unit

Function

200 230 460 575

Voltage

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Installation

Table 27. Electrical service sizing data — crankcase

heaters (heating mode on 460/575 volt only) — 20-130 tons

Nominal Tons

(Air-cooled/

Evaporative condensing) (Add) FLA

20-30/24-36 1 40-60/48-73 2 70-75/80-89 3

90-105 3

115-130 4

Table 28. Voltage utilization range

Unit Voltage

200/60/3 180-220 230/60/3 207-253 380/50/3 342-418 415/50/3 373-457 460/60/3 414-506 575/60/3 517-633

Voltage

Utilization Range

Power Wire Sizing and Protection Device Equations

To correctly size the main power wiring for the unit, use the

appropriate calculation(s) listed below. Read the load definitions that follow and use Calculation #1 for determining the MCA (Minimum Circuit Ampacity), MOP (Maximum Over current Protection), and RDE (Recommended Dual Element fuse size) for SAH_ (Cooling Only) units, SXH_ (Extended Casing) units, SLH_ and SSH_ (Cooling withWet Heat) units, and SFH_ (Cooling with Gas Heat) units Use Calculation #2 for SEH_ (Cooling with electric Heat) units.

Load Definitions:

LOAD 1 = CURRENT OFTHE LARGEST MOTOR (COMPRESSOR OR FAN MOTOR)

LOAD 2 = SUM OFTHE CURRENTS OF ALL REMAINING MOTORS

LOAD 3 = CURRENT OF ELECTRIC HEATERS

LOAD 4 = ANY OTHER LOAD RATED AT 1 AMP OR MORE

CONTROL POWERTRANSFORMER FOR ALL MODES

20 - 40Ton Units, add 3 FL Amps

50 - 75Ton Units, add 6 FL Amps

90 - 130Ton Units, add 8 FL Amps

CRANKCASE HEATERS FOR HEATING MODE 460/575V ONLY

20 - 30Ton Units, Add 1 Amp

40 - 60Ton Units, Add 2 Amps

70 - 75Ton Units, Add 3 Amps

62 RT-SVX36K-EN

90 - 130Ton Units, Add 4 Amps

• Calculation #1 - SAH_, SXH_, SLH_, SSH_, and SFH_ Units.

MCA = (1.25 x LOAD 1) + LOAD 2 + LOAD 4 MOP = (2.25 x LOAD 1) + LOAD2+LOAD4

Select a fuse rating equal to the MOP value. If the MOP value does not equal a standard fuse size as listed in NEC 240 - 6, select the next lower standard fuse rating.

Note: If selected MOP is less than the MCA, then select

the lowest standard maximum fuse size which is equal to or larger than the MCA, provided the selected fuse size does not exceed 800 amps.

RDE=(1.5xLOAD1)+LOAD2+LOAD4

Select a fuse rating equal to the RDE value. If the RDE value does not equal a standard fuse size as listed in NEC 240 6, select the next higher standard fuse rating.

Note: If the selected RDE is greater than the selected MOP

value, then select the RDE value to equal the MOP value.

• Calculation #2 - Rooftop units with Electric Heat (SEH_ 20 - 130Tons)

a. Single Source Power (380V, 415V, 460V, and 575V)

To arrive at the correct MCA, MOP, and RDE values for

these units, you must perform two sets of calculations. First calculate the MCA, MOP, and RDE values as if the unit was operating in the cooling mode (use the equations given in Calculation #1 above).Then calculate the MCA, MOP, and RDE values as if the unit was operating in the heating mode as follows. (Keep in mind when determining LOADS that the compressors do not operate while the unit is in the heating mode).

For units using heaters less than 50 Kw: MCA = 1.25 x (LOAD1+LOAD2+LOAD4)+(1.25xLOAD3)

For units using heaters equal to or greater than 50 Kw: MCA=1.25x(LOAD1+LOAD2+LOAD4)+LOAD3

The nameplate MCA value will be the larger of the cooling

mode MCA value or the heating mode MCA value calculated above.

MOP = (2.25 x LOAD 1) + LOAD2+LOAD3+LOAD4

The selected MOP value will be the larger of the cooling

mode MOP value or the heating mode MOP value calculated above.

Select a fuse rating equal to the MOP value. If the MOP value does not equal a standard fuse size as listed in NEC 240 - 6, select the next lower standard fuse rating.

Note: If selected MOP is less than the MCA, then select

the lowest standard maximum fuse size which is equal to or larger than the MCA, provided the selected fuse size does not exceed 800 amps.

RDE=(1.5xLOAD1)+LOAD2+LOAD3+LOAD4

The selected RDE value will be the larger of the cooling

mode RDE value or the heating mode RDE value calculated above.

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Installation

Select a fuse rating equal to the RDE value. If the RDE value does not equal a standard fuse size as listed in NEC 240 6, select the next higher standard fuse rating.

Note: If the selected RDE is greater than the selected MOP

value, then select the RDE value to equal the MOP value.

b. Dual Source Power units (200V and 230V)

These units will have two circuit values shown on the

nameplate.The first circuit value will be the refrigeration (cooling mode) values calculated using calculation #1 above.The second set of circuit values shown on the nameplate will be for the electric heating circuit as follows.

MCA=(1.25xLOAD3) MOP=(1.25xLOAD3)

Select a fuse rating for the electric heating circuit that’s equal to the MOP value obtained in the equation above. If the MOP value does not equal a standard fuse size as listed in NEC 240 - 6, select the next lower standard fuse rating (see note below for exception).

Note: If selected MOP is less than the MCA obtained in

the equation above, then select the lowest standard maximum fuse size which is equal to or larger than the MCA, provided the selected fuse size does not exceed 800 amps.

RDE=LOAD3

Select a fuse rating for the electric heating circuit that’s equal to the RDE value. If the RDE value does not equal a standard fuse size as listed in NEC 240 - 6, select the next higher standard fuse rating.

Note: If the selected RDE is greater than the selected MOP

value, then select the RDE value to equal the MOP value.

Disconnect Switch Sizing (DSS)

• Calculation #1 - SX, SF, SA, SL, or SS Single Power Source Units

DSS=1.15X(LOAD1+LOAD2+LOAD4)

• Calculation #2 - All SEH_ Single Power Source Units

DSS = 1.15 X (LOAD 3 + Supply Fan FLA + Exhaust Fan FLA)

PLUS

DSS=1.15X(LOAD1+LOAD2+LOAD4)

Use the larger value of the two calculations to size the electrical service.

• Calculation #3 - SEHL (200/230 Volt) 20 - 75 Ton Dual Power Source Units

DSS = 1.15X LOAD3for the Electric heater AND Calculation #1 for the Refrigeration Components

Field Installed Control Wiring

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

The Rooftop Module (RTM) must have a mode input in

order to operate the rooftop unit.The flexibility of having several system modes depends upon the type of sensor and/or remote panel selected to interface with the RTM.An overall layout of the various control options available for a Constant Volume application, with the required number of conductors for each device, is illustrated in Figure 40,

p. 57. Figure 43, p. 71 illustrates the various control

options with the required number of conductors for a

Variable Air Volume application.

Note: All field wiring must conform to NEC guidelines as

well as state and local codes.

The various field installed control panels, sensors,

switches, and contacts discussed in this section require both AC and DC consideration. These diagrams are representative of standard applications and are provided for general reference only. Always refer to the wiring diagram that shipped with the unit for specific electrical schematic and connection information.

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Installation

Controls Using 24 VAC

Before installing any connecting wiring, refer to Figure 14,

p. 28 and Figure 15, p. 29 for the electrical access locations

provided on the unit and Table 29 for AC conductor sizing guidelines, and;

1. Use copper conductors unless otherwise specified.

2. Ensure that the AC control wiring between the controls and the unit's termination point does not exceed three (3) ohms/conductor for the length of the run.

Note: Resistance in excess of 3 ohms per conductor may

cause component failure due to insufficient AC voltage supply.

3. Be sure to check all loads and conductors for grounds, shorts, and mis-wiring.

Table 29. AC Conductors

Distance from unit to control Recommended wire size

000-460 feet 18 gauge 461-732 feet 16 gauge

733-1000 feet 14 gauge

4. Do not run the AC low voltage wiring in the same conduit with the high voltage power wiring.

Controls using DC Analog Input/Outputs

Before installing any connecting wiring between the unit and components utilizing a DC analog input/output signal, refer to the appropriate illustration in Figure 14, p. 28 -

Figure 15, p. 29 for the electrical access locations provided

on the unit and

Table 30 for conductor sizing guidelines and;

1. Use standard copper conductor thermostat wire unless otherwise specified.

2. Ensure that the wiring between the controls and the unit's termination point does not exceed two and a half (2.5) ohms/conductor for the length of the run.

Note: Resistance in excess of 2.5 ohms per conductor can

cause deviations in the accuracy of the controls.

Table 30. DC Conductors

Distance from unit

to control

000-150 feet 22 gauge 151-240 feet 20 gauge 241-385 feet 18 gauge 386-610 feet 16 gauge 611-970 feet 14 gauge

3. Do not run the electrical wires transporting DC signals in or around conduit housing high voltage wires.

Units equipped with aTrane Communication Interface (TCI), BACnet Communication Interface (BCI), or LonTalk

Recommended

wire size

communication Interface (LCI) option which utilizes a serial communication link;

• Must be 18 AWG shielded twisted pair cable (Belden 8760 or equivalent).

• Must not exceed 5,000 feet maximum for each link.

• Must not pass between buildings.

Constant Volume System Controls

Remote Panel w/o NSB - (BAYSENS110*)

This electronic sensor features four system switch settings

(Heat, Cool, Auto, and Off) and two fan settings (On and

Auto) with four system status LED's. It is a manual or

automatic changeover control with dual setpoint capability. It can be used with a remote zone sensor BAYSENS077*. Refer to Table 31 for the Temperature vs. Resistance coefficient.

ZoneTemperature Control Zone Panel (5U68) (BAYSENS108*)

This electronic sensor features four system switch settings

(Heat, Cool, Auto, and Off) and two fan settings (On and

Auto). It is a manual or automatic changeover control with

dual setpoint capability.

Variable Air Volume and Constant Volume System Controls

Remote Panel w/o NSB (5U59) (BAYSENS021*)

The remote panel w/o Night setback has a system switch

as well as a S/A temperature setpoint indicator, a local sensor, and four LED's. These features allow the operator to control system operation, and monitor unit operating status from a remote location. Use the installation instructions that shipped with the panel to install it, and the unit's field wiring diagram to connect it to the unit.

Discharge Temperature Control Changeover Contacts (5K87)

These contacts are connected to the RTM when daytime

heating on DischargeTemperature Control units with internal or external hydronic heat is required. Daytime (occupied) heating switches the system to a Zone

Temperature Control type mode of operation. Refer to the

unit wiring diagram for the field connection terminals in the unit control panel.The switch must be rated at 12 ma @ 24 VDC minimum.

Remote Human Interface Module (5U66)

The remote Human Interface module enables the operator

to set of modify the operating parameters of the unit using it's 16 key keypad and view the operating status of the unit on the 2 line, 40 character LCD screen without leaving the building. However, the Remote Human Interface module can not be used to perform any service functions.

64 RT-SVX36K-EN

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Installation

One remote panel is designed to monitor and control up to four units providing each of the units are equipped with an IPCB module. Use the installation instructions that shipped with the module to install it, and the appropriate illustrations in Figure 40, p. 57 or Figure 47, p. 75 to connect it to the unit.

Remote Zone Sensor (BAYSENS073*)

This electronic analog sensor features remote zone

sensing and timed override with override cancellation. It is used when the RTM has been programmed as the source for zone temperature control. Refer to Table 31 for the

Temperature vs. Resistance coefficient.

Remote Zone Sensor (BAYSENS074*)

This electronic analog sensor features single setpoint

capability and timed override with override cancellation. It is used with aTrane Integrated Comfort

Table 31 for the Temperature vs. Resistance coefficient.

system. Refer to

Remote Zone Sensor (5RT16, 5U57, and 5U69) (BAYSENS016*)

This bullet type analogTemperature sensor can be used

for; outside air (ambient) sensing, return air temperature sensing, supply air temperature sensing, remote temperature sensing (uncovered), morning warm-up temperature sensing, and for supply air temperature reset.

Wiring procedures vary according to the particular

application and equipment involved. When this sensor is wired to a BAYSENS119* Remote Panel, wiring must be 18 AWG Shielded Twisted Pair (Belden 8760 or equivalent). Refer to Table 31 for the Temperature vs. Resistance coefficient.

Remote Zone Sensor (5RT16, 5U57, and 5U69) (BAYSENS077*)

This electronic analog sensor can be used with

BAYSENS119* or 021A Remote Panels.When this sensor is wired to a BAYSENS119* Remote Panel, wiring must be 18 AWG Shielded Twisted Pair (Belden 8760 or equivalent). Refer to the specific Remote Panel for wiring details.

Remote Panel w/ NSB - (BAYSENS119*)

This 7 day programmable sensor features four periods for

Occupied\Unoccupied programming per day. If the power is interrupted, the program is retained in permanent memory. If power is off longer than 2 hours, only the clock and day may have to be reset.

The six programming keys located on the front panel

allows selection of four system modes (Heat, Cool, Auto, and Off), two fan modes (On and Auto). It has dual temperature selection with programmable start time capability.

The occupied cooling setpoint ranges between 40°and 80°

Fahrenheit.The warm-up setpoint ranges between 50° and 90° Fahrenheit with a 2 degrees deadband. The Unoccupied cooling setpoint ranges between 45 and 98 degrees Fahrenheit.The heating setpoint ranges between

43 and 96 degrees Fahrenheit.Two liquid crystal displays (LCD) display zone temperature, temperature setpoints, week day, time, and operational mode symbols.

The sensor can be programmed to enable or disable

applicable functions, i.e.; Morning Warm-up, Economizer minimum CFM override during unoccupied status, Fahrenheit or Centigrade, Supply air tempering, Remote zone temperature sensor, 12/24 hour time display, Smart fan, and Computed recovery.

During an occupied period, an auxiliary relay rated for 1.25 amps @ 30 volts AC with one set of single pole double throw contacts is activated. See Table 31 for the

Temperature vs. Resistance coefficient.

Remote Minimum Position Potentiometer (5U70) (BAYSTAT023*)

The remote minimum position potentiometer is used on

units with an economizer. It allows the operator to remotely set the economizer's minimum position (which controls the amount of outside air entering the unit). Use the installation instructions that shipped with the potentiometer to install it, and the appropriate illustrations in Figure 40, p. 57 or Figure 47, p. 75to connect it to the unit.

External Auto/Stop Switch (5S67)

A field supplied single pole single throw switch (5S67) may

be used to shut down the unit operation.This switch is a binary input wired to the RTM. When opened, the unit shuts down immediately and can be cancelled by closing the switch. Refer to the appropriate illustrations in

Figure 40, p. 57 or Figure 47, p. 75 for the proper

connection terminals in the unit control panel.The switch must be rated for 12 ma @ 24 VDC minimum.

VOM Contacts (5K90, 5K91, 5K92, 5K93, 5K94)

If the unit is equipped with a Ventilation Override Module (VOM), a number of special functions can be specified by the building owner or contractor.These functions can include, but are not limited to; (1) Unit Off, (2) Pressurization, (3) Exhaust/Return, (4) Purge, and (5) Purge with Duct Pressure Control.They are controlled by binary inputs wired to the VOM.These functions can be initiated by; a toggle switch, a time clock, or an ICSTM output.The switch must be rated for 12 ma @ 24 VDC minimum. The following preset sequences can be modified by the customer;

• VOM Mode “A” Priority 1 - Unit Off:

– Supply fan - OFF

– VFD - 0% (if equipped)

– Exhaust/Return fan - OFF, Exhaust/Return dampers

Closed

– O/A dampers - Closed

– Heat - All stages OFF, Modulating Heat output at 0

VDC

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Installation

– Occupied/Unoccupied output - De-energized

(Occupied)

– VO Relay - Energized

– Pre-heater State - Off (if equipped)

• VOM Mode “B” Priority2-Pressurize:

– Supply fan - ON

– VFD - 100% (if equipped)

– Exhaust/Return fan - OFF, Exhaust/Return dampers

- Closed

– O/A dampers - Open

– Heat - All stages OFF, Modulating Heat output at 0

VDC

– Occupied/Unoccupied output - Energized

(Unoccupied)

– VO Relay - Energized

– Pre-heater State - Off (if equipped)

• VOM Mode “C” Priority 3 - Exhaust/Return:

– Supply fan - OFF

– VFD - 0% (if equipped)

– Exhaust/Return fan - ON, Exhaust/Return dampers -

Open

– O/A dampers - Closed

– Heat - All stages OFF, Modulating Heat output at 0

VDC

– Occupied/Unoccupied output - De-energized

(Occupied)

– VO Relay - Energized

– Pre-heater State - Off (if equipped)

• VOM Mode “D” Priority4-Purge:

– Supply fan - ON

– VFD - 100% (if equipped)

– Exhaust/Return fan - ON, Exhaust/Return dampers -

Open

– O/A dampers - Open

– Heat - All stages OFF, Modulating Heat output at 0

VDC

– Occupied/Unoccupied output - Energized

(Unoccupied)

– VO Relay - Energized

– Pre-heater State - Off (if equipped)

• VOM Mode “E” Priority5-Purge with duct pressure control:

– Supply fan - ON

– VFD - (if equipped) Controlled by S/A Pressure

Control with supply air pressure high limit disabled.

– Exhaust/Return fan - ON, Exhaust/Return dampers -

Open

– O/A dampers - Open

– Heat - All stages OFF, Modulating Heat output at 0

VDC

– Occupied/Unoccupied output - Energized

(Unoccupied)

– VO Relay - Energized

– Pre-heater State - Off (if equipped)

“OFF” - will appear in the Ventilation Override screen after

all VOM binary inputs have been reset (opened).

Due to codes in some areas, the definitions for some or all of theVOM modes may have to be locked into the program by the user. Once the definitions are locked, theVentilation Override Module must be replaced in order to reprogram that sequence.

Refer to Figure 40, p. 57 or Figure 47, p. 75 for the proper connection terminals in the unit control panel for each of the VOM initiating device’s and the appropriate Programming,Troubleshooting Guide (PTG Latest Edition) for programming instructions.

Emergency Override Definitions (with LCI-I/ BCI-I module installed)

When an LCI-I/BCI-I module is installed, the user can

initiate one of five (5) Emergency Override sequences that have the following predefined unit operation:

PRESSURIZE

– Supply Fan - On

– Exhaust/Return Fan - Off (if equipped)

– Exhaust/Return Dampers - Closed (if equipped)

– OA Dampers - Open

– Heat - All heat stages Off (staged gas and elec.),

Hydronic

– Heat & Mod Gas Heat output at 0%.

– Occupied/Unoccupied output - Energized

– VO Relay - Energized (with VOM module installed)

– OA Preheater State - Off (with VCM module

installed)

DEPRESSURIZE

– Supply Fan - Off

– Exhaust/Return Fan - On (if equipped)

– Exhaust/Return Dampers -Open (if equipped)

– OA Dampers - Closed

– Heat - All heat stages Off (staged gas and elec.),

Hydronic

– Heat & Mod Gas Heat output at 0%.

– Occupied/Unoccupied output - De-energized

– VO Relay - Energized (with VOM module installed)

– OA Preheater State - Off (with VCM module

installed)

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Installation

PURGE

– Supply Fan - On

– Exhaust/Return Fan - On (if equipped)

– Exhaust/Return Dampers - Open (if equipped)

– OA Dampers - Open

– Heat - All heat stages Off (staged gas and elec.),

Hydronic

– Heat & Mod Gas Heat output at 0%.

– Occupied/Unoccupied output - Energized

– VO Relay - Energized (with VOM module installed)

– OA Preheater State - Off (with VCM module

installed)

SHUTDOWN

– Supply Fan - Off

– Exhaust/Return Fan - Off (if equipped)

– Exhaust/Return Dampers - Closed (if equipped)

– OA Dampers - Closed

– Heat - All heat stages Off (staged gas and elec.),

Hydronic

– Heat & Mod Gas Heat output at 0%.

– Occupied/Unoccupied output - De-energized

– VO Relay - Energized (with VOM module installed)

– OA Preheater State - Off (with VCM module

installed)

FIRE

– Supply Fan - Off

– Exhaust/Return Fan - Off (if equipped)

– Exhaust/Return Dampers - Closed (if equipped)

– OA Dampers - Closed

– Heat - All heat stages Off (staged gas and elec.),

Hydronic

– Heat & Mod Gas Heat output at 0%.

– Occupied/Unoccupied output - De-energized

– VO Relay - Energized (with VOM module installed)

– OA Preheater State - Off (with VCM module

installed)

The UCM network relies on various sensors located

throughout the system to provide temperature information in the form of an analog input. All of the sensors used have the same temperature vs. resistance co-efficient and are made from Keystone Carbon D97 material with a 1 degree Centigrade tolerance.

Table 31. Temperature vs. resistance coefficient

Temp. (°F)

-40 346.1 71 11.60

-30 241.7 72 11.31

-20 170.1 73 11.03

-10 121.4 74 10.76

-5 103 75 10.50 0 87.56 76 10.25 5 74.65 77 10.00 10 63.8 78 9.76 15 54.66 79 9.53 20 46.94 80 9.30 25 40.4 85 8.25 30 34.85 90 7.33 35 30.18 100 5.82 40 26.22 105 5.21 45 22.85 110 4.66 50 19.96 120 3.76 55 17.47 130 3.05 60 15.33 140 2.50 65 13.49 150 2.05 66 13.15 160 1.69 67 12.82 170 1.40 68 12.5 180 1.17 69 12.19 190 0.98 70 11.89 200 0.83

Resistance (in. 1000 Ohms)

Temp. (°F)

Resistance x 1000 Ohms

Emergency Stop Switch (5S71)

A normally closed (N.C.) switch (5S71) wired to the RTM

may be used during emergency situations to shut down all unit operations. When opened, an immediate shutdown occurs. An emergency stop diagnostic is entered into the Human Interface and the unit must be manually reset. Refer to the appropriate illustrations in Figure 40, p. 57 or

Figure 47, p. 75 for the proper connection terminals in the

unit control panel.The switch must be rated for 12 ma @ 24 VDC minimum.

Occupied/Unoccupied Contacts (5K86)

To provide Night Setback control if a remote panel with

NSB (5U58) was not ordered, a field supplied contact (5K86) must be installed.This binary input provides the Occupied/Unoccupied status information of the building to the RTM. It can be initiated by a time clock, or a Building

Automation System control output.The relay’s contacts

must be rated for 12 ma @ 24 VDC minimum. Refer to the appropriate illustrations in Figure 40, p. 57 or Figure 47,

p. 75 for the proper connection terminals in the unit

control panel.

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Installation

Demand Limit Relay (5K89)

If the unit is equipped with a Generic BAS Module (1U51), (i.e. unit model number digit 28 is a "B", "K", or "R"), a normally open (N.O.) switch may be used to limit the electrical power usage during peak periods. When demand limit is initiated, the mechanical cooling and heating operation is limited to 50% or 100% (20-30 ton) or 25%, 50%, 75%, or 100% (40-130 ton). Demand limit can be initiated by a dry contact closure or BAS input. These contacts must be rated for 12 ma @ 24 VDC minimum.

Outside Air Sensor (3RT3) - (BAYSENS016*)

This device senses the outdoor air temperature and sends

this information in the form of an analog input to the RTM. It's factory installed on units with an economizer, but can be field provided/installed and used for informational purposes on units without an economizer. Refer to the appropriate illustrations in Figure 40, p. 57 or Figure 47,

p. 75 for the proper connection terminals in the unit

control panel. Refer to Table 31, p. 67 forTemperature vs. Resistance coefficient.

Generic Building Automation System (1U51)

The Generic Building Automation System (GBAS) module

allows a non-Trane building control system to communicate with the rooftop unit and accepts external setpoints in form of analog inputs for cooling, heating, demand limiting, and supply air pressure parameters.

Generic Building Automation System Module (GBAS 0-5

VDC) - Provided for those cases where non-Tracer building

management system is used.The GBAS module provides a binary input for Demand Limiting, four (4) analog inputs for setpoint adjustment and five (5) relay outputs for diagnostic reporting. Inputs can use a potentiometer or 05 VDC signal.

Generic Building Automation System Module (GBAS 0-10

VDC) - Used to provide broad control capabilities for

building automation systems other thanTrane'sTracer system.The GBAS module provides a binary input for Demand Limiting, four (4) analog inputs for setpoint adjustment and four (4) analog outputs as well as one (1) relay output for diagnostic reporting. Inputs can use a potentiometer or 0-10 VDC signal.

Refer to Figure 47 for the input wiring to the GBAS module and the various desired setpoints with the corresponding DC voltage inputs for both VAV and CV applications.

For complete application details of the module, refer to Engineering Bulletin UN-PRB001-EN.

Note: If the unit has Comparative Enthalpy installed and

enabled, the ECEM Return Humidity input can be used for dehumidification/ humidification instead of the RTM humidity input.

Wall or Duct Mount Humidity Sensor (5U108) (BAYSENS036* or BAYSENS037*)

This field-installed humidity sensor is mounted in the

space or in the return air duct, sending an analog input to the RTM 1TB16-10 and 1TB16-11. It must be ordered/ installed for dehumidification control with modulating hot gas reheat, but can also be used for humidification applications.

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Installation

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Installation

Figure 43. Typical ventilation override binary output wiring diagram for 20-89 ton CV control options.

Refer to wiring notes on Figure 44.

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Installation

Figure 43. (continued from previous page) Typical ventilation override binary output wiring diagram for 20-89 ton CV control options. Refer to wiring notes on Figure 44.

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Installation

Figure 44. Field connection diagram notes for 20 - 89 ton CV or VAV applications

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Figure 45. Typical field wiring diagram for 20-89 ton VAV control option

Installation

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Installation

Figure 46. Typical field wiring diagram for 20-89 ton VAV control option

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Figure 47. Typical GBAS analog input wiring diagram for 20-89 ton CV & VAV control options

Installation

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Installation

Table 32. GBAS Voltage vs. Setpoint

Setpoint GBAS 0-5 VDC GBAS 0-10 VDC Valid Range

Occ Zone Cooling Setpoint(CV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F

Unocc Zone Cooling Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F

Occ Zone Heating Setpoint(CV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F

Unocc Zone Heating Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F

SA Cooling Setpoint (VAV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 40 to 90°F

SA Cooling Setpoint (SZVAV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 40 to 70°F

Zone Cooling Setpoint (SZVAV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 80°F

Zone/Return Critical Temperature Setpoint (RR only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 75 to 95°F

SA Heating Setpoint (VAV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 40 to 180°F

SA Heating Setpoint (SZVAV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 65 to 95°F

Space Static Pressure Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC -0.20 to 0.30 IWC

SA Static Pressure Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 0.7 to 5.1 IWC

Min OA Flow Setpoint 1 0.5 to 4.5 VDC 0.5 to 9.5 VDC 0 to Unit Max Flow

MWU Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F

Econ Dry Bulb Enable Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 140°F

SA_Reheat_Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 60 to 90°F

Minimum Position Setpoint 3 0.5 to 4.5 VDC 0.5 to 9.5 VDC 0 to 100%

Occ Dehumidification Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 40 to 65%

Unocc Dehumidification Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 40 to 65%

Occ Humidification Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 20 to 50%

Unocc Humidification Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 20 to 50%

Notes:

1. If DCV is enabled this is used for Design Minimum OA Flow Setpoint

2. If DCV is enabled, this is used for Design Minimum OA Damper Position Setpoint

Table 33. GBAS 0-10VDC output range

Setpoint GBAS 0-10 VDC Valid Range

Outdoor Air Temperature 0.5 to 9.5 VDC -40 to 200°F

Zone Temperature 0.5 to 9.5 VDC -40 to 200°F

Supply Air Temperature (VAV and CV Discharge Temperature Control only)

Supply Air Pressure (VAV only) 0.5 to 9.5 VDC 0.0 to 7.91 wc

Space Pressure 0.5 to 9.5 VDC -0.67-0.67 wc

Space RH 0.5 to 9.5 VDC 0-100%

OA RH 0.5 to 9.5 VDC 0-100%

Space CO2 Level 0.5 to 9.5 VDC 50-2000 PPM Cooling Capacity % 0.5 to 9.5 VDC 0-100% Heating Capacity % 0.5 to 9.5 VDC 0-100%

Outdoor Air Damper Position 0.5 to 9.5 VDC 0-100%

Outdoor Airflow 0.5 to 9.5 VDC 0 to 65,000 CFM

0.5 to 9.5 VDC -40 to 200°F

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Unit Replacement

This section covers the removal and preparation that is

necessary to set the R-410A replacement unit in place.

WARNING

R-410A Refrigerant under Higher Pressure than R-22!

The unit described in this manual uses R-410A

refrigerant which operates at higher pressures than R22 refrigerant. Use ONLY R-410A rated service equipment or components with this unit. For specific handling concerns with R-410A, please contact your local Trane representative.

Failure to use R-410A rated service equipment or components could result in equipment or components exploding under R-410A high pressures which could result in death, serious injury, or equipment damage.

WARNING

Fiberglass Wool

Precautionary Measures

• Avoid breathing fiberglass dust.

• Use a NIOSH approved dust/mist respirator.

• Avoid contact with the skin or eyes.Wearlong-sleeved, loose-fitting clothing, gloves, and eye protection.

• Wash clothes separately from other clothing: rinse washer thoroughly.

First Aid Measures

Eye Contact - Flush eyes with water to remove dust. If symptoms persist, seek medical attention.

Skin Contact - Wash affected areas gently with soap and warm water after handling.

Electrical Connection

WARNING

Live Electrical Components!

Main Electrical Power

Lock and tag out unit main electric power and remove power supply wiring from installed disconnect/terminal block of unit. See Figure 40, p. 57 for locations.

Note: Inspect wiring to ensure that all field-installed

wiring complies with NEC and applicable local codes.

SEHF Units w/200V or 230V Electric Heat:

(requires separate power supply to heater)

Lock and tag out unit main electric power and remove power supply wiring for the electric heat from a dedicated, field- supplied/installed disconnect to terminal block 4TB2, or to an optional unit mounted disconnect switch 4S15. See Figure 40, p. 57 for locations.

Field Installed Control Wiring

Note: Inspect wiring to ensure that all field-installed

wiring complies with NEC and applicable local codes.

Remove the field wiring connections for the variable air volume controls as applicable.

Note: Label wiring to save time when reconnecting

wiring is necessary.

Remove ground wire from the unit.

Note: The electrical connection for 40, 60, 70 and 75 ton

is 32 inches further down the unit than older style units. On full perimeter curbs, this also means the incoming electrical will be outside the curb area.

The electrician should be informed of both points.

See Figure 40, p. 57 for typical field wiring for 20-75 Ton units.

See Figure 41, p. 58 for typical field power wiring for 90- 130Ton units.

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Unit Replacement

Requirements for Gas Heat

1. Remove and isolate gas supply from the unit gas train

2. Ensure gas supply line piping joints are properly sealed

3. Remove drip leg Installed in the gas piping near the unit

4. Remove factory-supplied flue assembly installed on the unit

5. Remove the 3/4" CPVC furnace drain stub out that was used for condensate drain

WARNING

Hazardous Gases and Flammable Vapors!

When using dry nitrogen cylinders for pressurizing

Figure 48. Duct Static Pressure Control Layout

Condensate Drain Connections

Each S*HF or K unit is provided with two 1" evaporator condensate drain connections (one on each side of the unit).

1. 1. Remove all 1" condensate drain connections from unit, see Figure 49, p. 79.

Requirements for Hot Water Heat (SLH*)

1. Remove and isolate water piping that comes into the heating section from the base of the unit

2. Remove the installed, 3-way modulating valve, if necessary, to remove unit

3. Remove the valve actuator wiring.

Requirements for Steam Heat (SSH*)

1. Remove and isolate steam piping that comes into the heating section from the base of the unit

2. Remove, 2-way modulating valve if necessary

3. Remove the valve actuator wiring

Space Pressure Sensor and Tubing Installation (All units with Statitrac)

1. Remove field supplied pneumatic tubing connected to the space pressure transducer located in the filter section, see Figure 48, p. 78

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Figure 49. Condensate Drain Locations

Sloped Drain Pan Option (3) condensate drain openings both sides

Standard Drain Pan (1) condensate drain opening both sides

Unit Replacement

Note: Sloped Drain Pan Condensate Drain Connections When unit has optional sloped drain pan, connect all 3 drains on each side of the unit (total 6) to the trapped condensate drain. Each drain pan connection must be trapped. The drains may be trapped individually or connected and then trapped.

Supply and Return Duct Connections

Ensure supply and return duct connections were installed to the roof curb supply and return areas of roof curb, rather than to the unit itself.

Remove supply and return duct work if it was directly connected to the unit.

Lifting procedures

Unit Rigging & Placement

WARNING

Heavy Objects!

Do not use cables (chains or slings) except as shown. Each of the cables (chains or slings) used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. Other lifting arrangements may cause equipment or property-only damage. Failure to properly lift unit may result in death or serious injury. See details below.

Note: Use spreader bars as shown in Figure 22, p. 39

Refer to the unit Installation, Operation and Maintenance manual or unit nameplate for the weight. Refer to the installation instructions

located inside the side control panel for further rigging information.

A center-of-gravity illustration is shown in Figure 40, p. 57,

dimensional data is shown in Table 12.

Attach adequate strength lifting slings to all four lifting

lugs on 20 through 75Ton units and to all six lifting lugs on 90 through 130Ton units.The minimum distance between the lifting hook and the top of the unit should be 7 feet for 20 through 75Ton units and 12 feet for 90 through 130Ton units. Figure 21, p. 39 illustrates the installation of spreader bars to protect the unit and to facilitate a uniform lift. Figure 13, p. 35 lists the typical unit operating weights.

Tables 35-37 list weights for previous development

sequences of IntelliPak. (Table numbers will be different in IOM)

2. Test lift the unit to ensure it is properly rigged and balanced, make any necessary rigging adjustments.

3. Lift the unit.These units have a continuous base rail around the air handler section which allows for placement on dunnage or a tractor trailer for transport.

4. Remove old gasket from the roof curb and place new gasket material on curb, see Figure 50, p. 81.

Note: See Figure 51, Table 37, p. 82 and Table 38, p. 82 as

well Figure 52, Table 39, p. 83, to determine gasket material length using roof curb dimensions.

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Unit Replacement

A cross section of the juncture between the unit and the roof curb is shown in Figure 22, p. 39

Installation of S*HL or K units

See unit IOM and appropriate programming guide for installation operation and programming requirements.

Table 34. Typical Unit and Curb Weights (R-22)

Typical Unit Operating Weight

Unit Size SAHF SE,SL, SSHF SFHF SXHF SAHF S*HF/G

C20 4360 4690 4970 4580 490 510 C25 4520 4860 5130 4750 490 510 C30 5220 5590 5840 5460 490 510 C40 6890 7400 7880 7240 515 550 C50 7890 8450 8900 8290 515 550 C55 8140 8690 9170 8540 515 550 C60 9320 9650 10120 9480 610 640 C70 9860 10160 10640 10040 610 640 C75 9860 10160 10640 10040 610 640

Typical Unit Operating Weight

Unit Size

C20 4650 5000 5270 4860 490 510 C25 4830 5180 5440 5060 490 510 C30 5570 5930 6200 5800 490 510 C40 7290 7820 8280 7650 515 550 C50 8350 8900 9380 8740 515 550 C55 8600 9160 9640 9010 515 550 C60 9840 10150 10620 10010 610 640 C70 10370 10690 11160 10560 610 640 C75 10370 10690 11160 10560 610 640

(a)Weights represent the typical unit operating weights for the heating/cooling function indicated with an economizer and exhaust fan installed. (b) Roof curb weights include the curb and pedestal. (c) Weights represent the typical unit operating weights for the heating/cooling function indicated with an economizer, exhaust fan with supply and exhaust

VFD installed.

SAHF SE,SL, SSHF SFHF SXHF SAHF S*HF/G

(a)

(c)

Roof Curb Max. Weight (b)

Table 35. Approximate Roof Curb and S*HC Unit Operating Weights (Units Built Prior to 1991)

Typical Unit Operating Weight Roof Curb Max Weight

Unit Size

C20 4,600 4,950 5,250 445 470 C25 4,700 5,050 5,300 445 470 C30 5,500 6,050 6,200 445 470 C40 7,500 8,200 8,500 505 540 C50 8,350 9,100 9,200 530 560 C55 8,500 9,200 9,350 530 560 C60 9,600 10,300 10,400 545 575 C70 10,500 11,200 11,300 545 575 C75 10,700 11,400 11,500 545 575

Note: Weight shown in this table represents the maximum unit operating weight for S*HC units with heating/cooling functions

indicated and includes economizer and exhaust fan options. Actual unit weight is on the unit nameplate.

80 RT-SVX36K-EN

SAHC SE,SL,SS,SXHC SB,SFHC SAHC S*HF

Page 81

Unit Replacement

Table 36. Approximate Operating Weights, 90-100 Ton, “E” Style Cabinet (Units Built Prior to 1991)

Unit Size/Tons

SEHE C90 13,150 14,500 600 SFHE C90 13,820 15,150 600

SXHE C90 13,000 14,340 600

SEHE D11 13,700 15,050 600 600 SFHE D11 14,360 15,700 600 SXHE D11 13,550 14,880 600

Rooftop w/o

Exhaust Fans

Rooftop with Exhaust Fans Curb

Figure 50. Perimeter Gasket Material

Figure 51. Typical Partial Perimeter Curb with Pedestal Illustration for 20- 75 Ton Standard Units

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Unit Replacement

Table 37. Typical Curb Dimensions for 20 to 75 Ton SAHF Units with Air-Cooled Condensers (R-22) (See Figure 51)

Curb Dimensions

A 16' 3-7/8" 19' 1-15/16" 19' 1-15/16" 19' 1-15/16" B 2' 10-1/16" 7' 10-1/16" 7' 10-1/16 7' 10-1/16" C 7' 10-7/16" 7' 10-7/16" 7' 10-7/16" 9' 11-15/16"

D 7' 0-13/16" 7' 0-13/16" 7' 0-13/16" 9' 2-5/16"

E 16' 3-9/16" 19' 1-5/8" 19' 1-5/8" 19' 1-5/8"

F 7' 0-1/2" 7' 0-1/2" 7' 0-1/2" 9' 2" G 13' 6-15/16" 16' 2-9/16" 16' 2-9/16" 16' 2-9/16" H 7' 11-15/16" 7' 11-15/16" 7' 11-15/16" 10' 1-7/16"

J 5' 8-13/16" 5' 8-13/16" 5' 8-13/16" 7' 10-5/16"

K 2' 0" 2' 0" 2' 0" 2' 0"

L 2' 5-5/16" 3' 6" 3' 6" 3' 6" M 2' 11-5/16" 4' 0" 4' 0" 4' 0"

N 1' 10-5/8" 1' 10-5/8" 1' 10-5/8" 1' 10-5/8"

P 5' 9-1/2" 5' 9-1/2" 5' 91/2" 6' 11-7/8" Q 0' 5-11/16" 0' 5-11/16" 0' 5-11/16" 0' 11-3/16"

R 0' 5-11/16" 0' 5-11/16" 0' 5-11/16" 0' 11-3/16"

S 2' 3-5/16" 2' 5-15/16" 2' 5-15/16" 2' 5-15/16"

SAHF-C20,

C25, C30 SAHF-C40 SAHF-C50, C55

SAHF-C60,

C70, C75

Table 38. Typical Curb Dimensions for SEHF, SFHF, SLHF, SSHF, SXHF, 20 to 75Ton Units with Air-Cooled Condensers (R-

22) (Figure 51)

Curb Dimensions

A 18' 7-1/2" 22' 4-1/2" 22' 4-1/2" 22' 4-1/2"

B 2' 10-1/16" 7' 10-1/16" 7' 10-1/16" 7' 10-1/16

C 7' 10-7/16" 7' 10-7/16" 7' 10-7/16" 9' 11-15/16" D 7' 0-13/16" 7' 0-13/16" 7' 0-13/16" 9' 2-5/16"

E 18' 7-3/16" 22' 4-1/8" 22' 4-1/8" 22' 4-1/8"

F 7' 0-1/2" 7' 0-1/2" 7' 0-1/2" 9' 2" G 15' 10-9/16" 19' 5" 19' 5" 19' 5" H 7' 11-15/16" 7' 11-15/16" 7' 11-15/16" 10' 1-7/16"

J 5' 8-13/16" 5' 8-13/16" 5' 8-13/16" 7' 10-5/16"

K 2' 0" 2' 0" 2' 0" 2' 0"

L 2' 5-5/16" 3' 6" 3' 6" 3' 6" M 2' 11-5/16" 4' 0" 4' 0" 4' 0" N 1' 10-5/8" 1' 10-5/8" 1' 10-5/8" 1' 10-5/8"

P 5' 7-3/8" 5' 7-3/8" 5' 7-3/8" 7' 8-3/4" Q 1' 0-7/16" 0' 11-3/16" 0' 11-3/16" 0' 11-3/16"

R 0' 1 " 0' 2-1/4" 0' 2-1/4" 0' 2-3/8"

S 2' 3-5/16" 2' 5-5/16" 2' 5-5/16" 2' 5-5/16"

S_HF-C20,

C25, C30 S_HF-C40 S_HF-C50, C55

S_HF-C60,

C70, C75

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Figure 52. Full Perimeter Curb with Pedestal (20-75Ton Units Built Prior to 1991)

Unit Replacement

Table 39. 20-75 Ton Roof Curb Dimensions - Downflow (Units Built Prior to 1991)

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Installation Checklist

20-130 Ton, Air-Cooled and Evaporative Condensing

The checklist listed below is a summary of the steps

required to successfully install a commercial rooftop unit.

This checklist is intended to acquaint the installing

personnel with what is required in the installation process.

Table 40. Installation Checklist

General Unit Requirements

Check the unit for shipping damage and material shortage; file a freight claim and notify Trane office. Verify that the installation location of the unit will provide the required clearance for proper operation. Assemble and install the roof curb per

the current edition of the curb installation guide. Fabricate and install ductwork; secure ductwork to curb. Install pitch pocket for power supply through building roof. (If applicable) Rigging the unit. Set the unit onto the curb; check for levelness. Ensure unit-to-curb seal is tight and without buckles or cracks. Install and connect condensate drain lines to each evaporator drain connection. Remove the shipping hold-down bolts and shipping channels from the supply and exhaust/return fans ordered with rubber or spring

isolators. Check all optional supply and exhaust/return fan spring isolators for proper adjustment. Verify all discharge and liquid line service valves (one per circuit) are back seated.

Main Electrical Power Requirements

Verify that the power supply complies with the unit nameplate specifications. Inspect all control panel components; tighten any loose connections. Connect properly sized and protected power supply wiring to a field-supplied/installed disconnect and unit. Properly ground the unit.

Note: All field-installed wiring must comply with NEC and applicable local codes.

Field Installed Control Wiring

Complete the field wiring connections for the constant volume controls as applicable. Refer to “Field Installed Control Wiring” for guidelines.

Complete the field wiring connections for the variable air volume controls as applicable. Refer to “Field Installed Control Wiring” for guidelines.

Note: All field-installed wiring must comply with NEC and applicable local codes.

Requirements for Electric Heat Units

All SEHL and SEHK Units (380 minimum voltage)

Verify that the power supply complies with the electric heater specifications on the unit and heater nameplate. Inspect the heater junction box and control panel; tighten any loose connections. Check electric heat circuits for continuity.

SEHL Units w/200V or 230V Electric Heat: (Requires Separate Power Supply to Heater)

Connect properly sized and protected power supply wiring for the electric heat from a dedicated, field- supplied/installed disconnect to terminal block 4TB2, or to an optional unit mounted disconnect switch 4S15.

Continued on next page

Important: This checklist does not replace the detailed

instructions called out in the applicable sections of this manual.

Task

Completed

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Installation Checklist

Table 40. Installation Checklist (continued)

Requirements for Gas Heat (SFH_)

Gas supply line properly sized and connected to the unit gas train. All gas piping joints properly sealed. Drip leg Installed in the gas piping near the unit. Gas piping leak checked with a soap solution. If piping connections to the unit are complete, do not pressurize piping in excess

of 0.50 psig or 14 inches w.c. to prevent component failure. Main supply gas pressure adequate. Flue Tubes clear of any obstructions. Factory-supplied flue assembly installed on the unit. Connect the ¾” CPVC furnace drain stubout to a proper condensate drain.

Requirements for Hot Water Heat (SLH_)

Route properly sized water piping through the base of the unit into the heating section. Install the factory-supplied, 3-way modulating valve. Complete the valve actuator wiring.

Requirements for Steam Heat (SSH_)

Install an automatic air vent at the top of the return water coil header. Route properly sized steam piping through the base of the unit into the heating section. Install the factory-supplied, 2-way modulating valve Complete the valve actuator wiring. Install ½” , 15-degree swing-check vacuum breaker(s) at the top of each coil section. V ent breaker(s) to the atmosphere or merge

with return main at discharge side of steam trap. Position the steam trap discharge at least 12" below the outlet connection on the coil. Use float and thermostatic traps in the system, as required by the application.

O/A Pressure Sensor and Tubing Installation (All units with Statitrac or Return Fans)

O/A pressure sensor mounted to the roof bracket. Factory supplied pneumatic tubing installed between the O/A pressure sensor and the connector on the vertical support. Field supplied pneumatic tubing connected to the proper fitting on the space pressure transducer located in the filter section, and

the other end routed to a suitable sensing location within the controlled space (Statitrac only).

Requirements for Modulating Reheat Dehumidification

Install (5U108) humidity sensor in space or return duct Complete field wiring of humidity sensor to ECEM (1TB16). Refer to “Field Installed Control wiring” for guidelines.

Evaporative Condenser

Remove fan bracket Hookup inlet and drain piping Install Heat tape if needed Setup drain hold or drain on power loss Setup Mechanical Float Setup drain time Setup water quality management (3rd party or Trane factory-installed Dolphin Water Care™ System) Options setup Calibrate Conductivity Controller Setup blowdown set points on the conductivity sensor

Task

Completed

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Cooling Sequence of Operation

Time delays are built into the controls to increase

reliability and performance by protecting the compressors and maximizing unit efficiency.

NOTICE:

Compressor Failure!

Unit must be powered and crankcase heaters energized at least 8 hours BEFORE compressors are started. This will protect the compressors from premature failure.

Compressor Crankcase Heaters

Each compressor is equipped with a crankcase heater.The proper operation of the crankcase heater is important to maintain an elevated compressor oil temperature during the “Off” cycle to reduce oil foaming during compressor starts.

When the compressor starts, the sudden reduction in

crankcase pressure causes the liquid refrigerant to boil rapidly causing the oil to foam.This condition could damage compressor bearings due to reduced lubrication and could cause compressor mechanical failures.

NOTICE:

Compressor Failure!

When power has been “Off” for an extended period,

allow the crankcase heater to operate a minimum of 24 hours before starting the unit.

SZVAV Cooling Sequence of Operation

Single Zone VAV units will be equipped with a VFD controlled supply fan which will be controlled via the 010VDC RTM VFD output and the RTM Supply Fan output.

The control scales theVdc output from the RTM linearly to

control between 37%-100% of the total fan speed range.

If the RTM determines that there is a need for active cooling capacity in order to meet the calculated

Temperature Setpoint (Tset), the unit will begin to stage

compressors accordingly once supply fan proving has been made. Note that the compressor staging order will be based on unit configuration and compressor lead/lag status.

Once theTset calculation has reached its bottom limit (Tset Lower Limit Setpoint) and compressors are being utilized to meet the demand, theTset value continues to calculate below theTset Lower Limit Setpoint and the algorithm will begin to ramp the Supply Fan Speed up toward 100%. Note that the supply fan speed will remain at the compressor stage’s associated minimum value (as described below) until theTset value is calculated below theTset Lower Limit Setpoint.

As the cooling load in the zone decreases the zone cooling algorithm will reduce the speed of the fan down to

minimum per compressor stage and control the compressor outputs accordingly. As the compressors begin to de-energize, the Supply Fan speed will fall back to the Cooling Stage’s associated minimum fan speed, but not below. As the load in the zone continues to drop cooling capacity will be reduced in order to maintain the discharge air within the ± ½ Tset deadband.

Cooling Stages Minimum Fan Speed

As the unit begins to stage compressors to meet the

cooling demand, the following minimum Supply Fan Speeds will be utilized for each corresponding Cooling Stage. Note that the Supply Fan Speed will be allowed to ramp up beyond 37% as determined by the activeTset calculation; the speeds below are only the minimum speeds per cooling stage. Note that when transitioning between active cooling stages, compressors may energize prior to the supply fan reaching the minimum speed for the associated step.

1. 2-Stage DX Cooling -The minimum fan speed for units with 2 stages of DX Cooling will be 37% of the unit’sfull airflow capacity. At Stage 1 of DX Cooling the minimum Fan Speed will be 37% and at Stage 2 of DX Cooling the Fan Speed will be at a minimum of 67%.

2. 3-Stage DX cooling variable speed compressor units (40-70T) -The minimum fan speed for variable speed compressor units with 3 stages of compressor operation will be 37% of the unit's total airflow. Minimum fan speed will increase from 37% to 67% as nominal unit capacity increases from minimum to 75%. Minimum fan speed will be 67% at nominal unit capacities above 75%.

3. 4-Stage DX Cooling -The minimum fan speed for units with 4 stages of DX Cooling will be 37% of the unit’s total airflow. At Stage 1 the minimum Supply Fan Speed will be 37%, at Stage 2 the minimum Supply Fan Speed will be 58%, and at Stages 3 & 4 the minimum Supply Fan Speed will be 67%.

Rapid Restart

This feature will occur after every power cycle. Once

power is restored (e.g., via a backup generator), the RTM will maximize cooling capacity within 3-5 minutes. Once the space has returned to its Zone Temperature Setpoint, the RTM controls the load using normal capacity control algorithms.The supply fan will be turned on immediately after a power cycle, module initialization, or after the Unit Start Delay has timed out.The supply fan proving switch input must be closed prior to continuing with Rapid Restart.

Once the supply fan proving switch input has closed, the unit will consider the outside air temperature to determine whether economizing or DX mechanical cooling will be utilized to provide the necessary cooling. If the outside air temperature is less than 50°F and economizing is enabled, the outside air damper will be utilized. If the outside air

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temperature is above 50°F, the outside air damper will remain closed and DX mechanical cooling will occur for the duration of Rapid Restart.

Supply Fan Operation – Speed Control:

• VAV:The supply fan speed will ramp to 50%, then release to normal discharge static pressure control, limited only by the high duct static limit functionality.

• CV: The supply fan speed will turn on full airflow.

• SZVAV:The supply fan speed will ramp to full airflow.

Figure 53. Typical rapid restart timeline

Units without an Economizer

Upon entering an “occupied” mode of operation, the RTM receives input from the remote panel to start the supply fan. For constant volume applications, the RTM supply fan contacts K2 close which energizes the supply fan contactor 1K16. When the supply fan starts, the fan proving switch (3S68) closes, signaling the RTM that airflow has been established.The VFD will begin to ramp the fan, (if equipped).

When a cooling request is sent to the RTM from a zone

temperature sensor, the RTM evaluates the operating condition of the system using the supply air temperature input and the outdoor temperature input before sending the request to the SCM/MCM. Once the request is sent to the SCM/MCM, the compressor module checks the compressor protection circuit before closing “Stage 1” (K10 on SCM or K11 on MCM). After the first functional stage has started, the compressor module monitors the saturated refrigerant temperature and closes the condenser fan output contact “1A”, when the saturated refrigerant temperature rises above the “lower limit” setpoint.

Units with an Economizer

established.The RTM opens the economizer dampers to the specified “minimum position”.

When a cooling request is sent to the RTM from the zone

temperature sensor, the RTM evaluates the operating condition of the system using the supply air temperature input and the outdoor temperature input before sending the request to the SCM/MCM for mechanical cooling. If the outdoor conditions are suitable for cooling (temperature and humidity are within specified setpoints), the RTM will attempt to maintain the zone temperature without using any compressors. If the zone temperature can not be maintained within the setpoint deadband, the RTM sends a cooling request to the SCM/MCM.The compressor module checks the compressor protection circuit before closing “Stage 1” (K10 on SCM or K11 on MCM). After the first functional stage has started, the compressor module monitors the saturated refrigerant temperature and closes the condenser fan output contact “1A”, when the saturated refrigerant temperature rises above the “lower limit” setpoint.

Units with Return Fan

The return fan is started once the supply fan is verified ON

by the supply fan proving function. If equipped, the variable speed return fan is modulated to control return plenum pressure to the Return Plenum Pressure Setpoint and Return Plenum Pressure Deadband.

For the first two minutes of return fan operation, the outside air damper control and if equipped, building space pressure control are disabled so that the exhaust damper remains closed. After the two minute delay, the outside air damper is released to normal ventilation requests, and exhaust damper control will either track the outside air damper or if equipped, the exhaust damper control is released to normal space pressure control.

Units with Traq Sensor

The outside air enters the unit through theTRAQ Sensor

assembly and is measured by velocity pressure flow rings.

The velocity pressure flow rings are connected to a

pressure transducer/solenoid assembly.The solenoid is used for calibration purposes to compensate for temperature swings that could affect the transducer.The

Ventilation Control Module (VCM) utilizes the velocity

pressure input, the RTM outdoor air temperature input, and the minimum outside air CFM setpoint to modify the volume (CFM) of outside air entering the unit as the measured airflow deviates from setpoint.

When the optional temperature sensor is installed and the

Preheat function is enabled, the sensor will monitor the combined (averaged) outside air and return air temperatures. As this mixed air temperature falls below the Preheat Actuate Temperature Setpoint, the VCM will activate the preheat binary output used to control a field installed heater.The output will be deactivated when the temperature rises 5 above the Preheat Actuate

Temperature Setpoint.

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When the optional CO2sensor is installed and the CO

Reset is enabled, as the CO2concentration increases above the CO minimum outside air CFM setpoint to increase the amount of outside air entering the unit.The setpoint will be adjusted upward until the CO reached.The maximum effective (reset) setpoint value for outside air entering the unit is limited to the systems operating CFM. As the CO effective (reset) setpoint value is adjusted downward toward the minimum outside air CFM setpoint.

Figure 54. CO

Reset Start Value, the VCM will modify the

Maximum Reset Value is

concentration decreases, the

reset

Low Charge Protection

For each refrigeration circuit, the entering and leaving

evaporator temperatures are used to calculate superheat. When the calculated superheat exceeds the Evaporator Temperature Differential Setpoint minus 5°F but not the

EvaporatorTemperature Differential Setpoint, an

information only, auto-reset, High Superheat diagnostic is

initiated.

If the calculated superheat exceeds the Evaporator Temperature Differential Setpoint, a manual reset, low

refrigerant charge diagnostic is initiated and all

compressors on the circuit are locked out.

Note that on circuits with the Variable Speed Compressor

option, the EvaporatorTemperature Differential Setpoint

for that circuit will be reset based on the active compressor

capacity and the user selected EvaporatorTemperature

Differential Setpoint.

Frostat™Control

The compressor module utilizes an evaporator

temperature sensor (3RT14 & 15), mounted on the suction

line of each circuit, to protect the evaporator from freezing.

If the evaporator temperature approaches the specified

setpoint, adjustable between 25°F and 35°F, the

compressor(s) will be cycled “off”.

The compressors will not be allowed to restart until the

evaporator temperature has risen 10°F above the specified

cutout temperature and the compressor(s) have been off

for a minimum of three minutes.

Note that on circuits with the Variable Speed Compressor

option, the Active Coil Frost CutoutTemperature Setpoint

for that circuit will be 5F higher than the user selected Coil Frost CutoutTemperature Setpoint.

Lead-Lag Operation

With Lead Lag operation each time the system cycles after

having stages 1 and 2 “On”, “Stage 2” (K11 on SCM or K3 on MCM) and the corresponding condenser fan output

“2A” will start first.

The compressor module cycles the compressors “On” and

“Off” to keep the zone temperature within the cooling

setpoint deadband.The condenser fans are cycled “On” and “Off” to maintain the saturated refrigerant temperature within the specified controlband.

Lead-Lag is not available with the variable speed compressor option.

Units Equipped with 100% Modulating Exhaust Dampers

The exhaust dampers are controlled through an Exhaust/

Comparative Enthalpy Module (ECEM).The ECE module receives input form a space transducer and modulates the exhaust dampers to maintain the space pressure to within the specified setpoint controlband.

Units equipped with Hot Gas Reheat (Modulating Dehumidification)

When space humidity exceeds setpoint and the unit is

loaded 50% or less, the modulating dehumidification function activates the reheat mode, providing dehumidification of the space.

The reheat valve and cooling valve are modulated to

control the discharge air temperature to the reheat discharge air temperature setpoint. In reheat mode, the reheat valve is commanded to control the discharge air (15 to 85%) to the reheat setpoint; the cooling valve mirrors the reheat valve position (85 to 15%).The reheat coil pumpout valve is energized when the unit is in active cooling, and de-energized during all other times including reheat mode.

Units with Evaporative Condenser Sequence of Operation

Upon a power up without water in the sump, the condenser sump drain will be controlled to allow the sump to hold water.The fill relay will be energized if there is a call for mechanical cooling and if the outdoor air temperature is greater than 10°F on units with a sump heater installed or greater than 40°F on units without sump heat.

Once the fill solenoid is energized, the sump will begin to fill. The minimum water level switch will close and the fill relay will be de-energized.The sump water temperature sensor is invalid unless the minimum water level switch is closed.

If the sump water temperature is less than the setpoint (default is 38°F), the sump heater will be energized until the water temperature reaches the setpoint plus 5 degrees (43°F for default).The fill solenoid will remain closed for 20

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minutes or until the water temperature is greater than 35°F.

Once a water temperature of 35°F or greater is achieved,

the fill solenoid is energized, the sump will continue to fill,

and a five minute timer is started.

When the timer expires, the compressor lockout will be

released and mechanical cooling will be allowed. Head

pressure control will be regulated by a variable speed fan

until the liquid line pressure from either circuit reaches the

upper limit, which is set on the Human Interface under the

setup menu 120°F default.The liquid line pressure is

converted to a temperature for display at the Human

Interface. When the temperature exceeds the upper limit,

the condenser sump pump will be energized. When the

sump pump is energized, water is pumped from the sump

and sprayed over the condenser coil. If the liquid line

pressure from either circuit falls below the lower limit the

sump pump will be de-energized.

When the sump pump is energized or de-energized a

change in state is observed from an auxiliary contactor to

ensure proper sump pump operation. A change in states

must be observed by the auxiliary contactor within 6

seconds of the command to change states or mechanical

cooling will be locked out on a sump pump failure causing

a manual reset diagnostic to be set.

The fill solenoid will remain energized and the water level

will be controlled by the mechanical float valve. If the

maximum level float ever closes, an information-only

diagnostic is set and the fill solenoid is de-energized.This

is an indication that the mechanical float is not adjusted

properly or a failure of the mechanical float valve has

occurred. If the maximum level input is open for two

continuous minutes, the diagnostic will be cleared and the

fill solenoid will be energized.

If the sump water temperature ever drops below 35°F, the

drain actuator will be controlled in order to drain the water

from the sump. If there is a call for mechanical cooling and

the outdoor air temp is greater than 10°F on units with

sump heat installed or greater than 40°F on units without

sump heat, the unit will be allowed to refill the sump.

The drain control can be configured via the Human

Interface, and by the drain actuator installation, to hold or

drain water on power loss; the default is set to drain.

Periodic purge is a cyclic opening of the drain to remove

debris and buildup from the sump and add additional

fresh water to the sump. Periodic purge has an adjustable

interval from the setup menu on the Human Interface with

a range of 1-12 hours or can be set to disabled - the default

position if periodic purge is not required. The duration of

the blowdown, or the time that the drain valve is opened,

is adjustable to a range of 5 - 255 seconds, with 60 seconds

being the default.

The optional conductivity controller also uses this timer to

open the drain, when required, based on water quality.

During this purge, the fill solenoid will remain energized to

provide fresh water to the sump to replace water being

released during the blowdown. Water treatment

blowdown is provided by shorting the designated input on

the customer-supplied terminal strip.This gives the customer more flexibility in determining water conditions via external controls. Once the input is detected closed, the drain valve will be opened for a time equal to the Human Interface adjustable periodic purge duration.

Once the duration timer expires, or if the minimum level switch opens, the drain valve will be closed and the water treatment blowdown input will be ignored for 15 minutes. During this blowdown the fill relay will remain open to provide fresh water to the sump.The adjustable duration time period should be set so that during drain operation 1 inch of water is drained from the sump with the fill solenoid valve closed. If the minimum water level switch opens during a blowdown cycle, the unit will de-energize the sump pump in order to protect the compressors and sump heater from insufficient water levels. Once the water level reaches the minimum level input and this input closes for 10 seconds, the compressors and sump heater operations will be allowed to restart.

Evaporative Condenser Drain Valve Setup

The drain valve is shipped to “Drain During Unit Power

Loss Conditions.”This means that when the unit disconnect is turned off, the 1S2 toggle switch is turned off, or the unit loses power, the drain will open. The valve is spring loaded and will travel from fully closed to fully open in approximately 25 seconds.

This is desirable in cold climates where a risk of freezing

exists. In milder climates it may be desirable to keep the water in the sump when unit power is off to avoid unnecessarily wasting water whenever the unit disconnect is turned off.

To convert the unit to “Hold During Unit Power Loss

Conditions”:

1. Remove power from the unit.

2. Remove the weather shield cover (Figure 55, p. 90).

3. Loosen the shaft set screw (Figure 55), remove the locking clip, and remove the shaft adapter (Figure 56,

p. 90).

4. Lift the drain valve actuator and rotate it to the “hold during power loss” position (Figure 58, p. 90).

5. Reinstall the shaft adapter and lockingclip and reinstall the actuator onto the base. Make sure the arrow on the shaft adapter is set to 0°.

6. Make sure the valve is in the fully closed position, then tighten the shaft set screw.

7. Reinstall the weather shield cover.

8. Restore power to the unit.

9. At the Human Interface, press SETUP, NEXT until 'Head Pressure Control Setup Submenu” is seen. Press ENTER.

10. Change the “Sump Drain Valve Relay Control” from Drain to Hold

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Figure 55. Drain valve actuator with weather shield

Weather Shield

Shaft Set Screw

Drain Valve Actuator

Figure 56. Actuator shaft adapter removal/assembly

Locking clip

Shaft adapter

Figure 57. Chemical water treatment tree

Figure 58. Actuator is shipped in “drain during power

loss” configuration

To drain during power loss, set shaft adapter to 0 degrees

To hold during power loss, set shaft adapter to 90 degrees

Set Drain DurationTimer

Enter service test mode from unit Human Interface. Navigate to the compressor condenser fan submenu. Under head pressure control, use manual control.

Close drain valve and energize water inlet solenoid valve until water reaches nominal level. Once level is achieved, de-energize fill solenoid. Open drain valve and time how long it takes for the water level to drop one inch, make sure to take into account the closing time of the valve.

Chemical Water Treatment Tree

TheTrane evaporative condenser comes with a PVC tree to

allow easier inputs for third party water treatment.The tee labeled A is a ¾ inch NPT threaded input, see Figure 57.

Tees B and C are 1/2 inch NPT threaded inputs.The ball

valve can be used to stop the water flow through the tree to allow the customer to add hookup of water treatment, or to change and update water treatment with the unit running.

Units with Dolphin WaterCare or conductivity sensor will have the conductivity sensor installed into the ¾ inch tee with the other tees plugged. For all other units, A, B and C will be plugged, see Figure 57. Ensure the ball valve is in the open position when water treatment is being operated in the system to make sure water flows through the tree and transports treatment to the unit sump.

90 RT-SVX36K-EN

Conductivity Controller

Upon startup, the conductivity controller must be calibrated and setup for operation. Below are the necessary steps to accomplish those tasks.The controller has two setpoints that control two relays. Both of these setpoints will need to be set by Dolphin or a local water treatment expert.

• The first setpoint is the standard point blowdown point.

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Unit Start Up

– When the setpoint is exceeded the relay (K1) will be

energized and a blowdown request will close the

Water treatment request binary input on the MCM.

• The second setpoint will be the emergency point

– The second setpoint will open the normally closed

K2 relay which will interrupt the sump proving circuit which will generate a manual lockout.This second setpoint will be used to protect the unit from extremely high conductivity that would indicate a failure in the system.

• Inside the enclosure for the controller, there will be a thermostat and strip heater that will protect LCD from cracking at low ambient conditions. The thermostat closes at 15°F and opens at 25°F.

Procedure to calibrate conductivity

Note: Visit this webpage for additional documentation:

<http://www.gfsignettools.com/products/pdf/ 8860eng.pdf>

• Use a calibrated thermometer and a known conductivity rating

• There are two different options for having a liquid with known conductivity

• Purchase a liquid with known conductivity rating

• Purchase a handheld conductivity reader

• Close the ball valve on the chemical treatment tree and remove the conductivity sensor from the tree

• Enter service test mode on the unit and turn the pump on, ensuring the compressors are set to Off

• With the conductivity controller connected to the sensor and power, enter the CALIBRATE menu by holding down the enter key for 2 seconds

• When asked for the calibration key code, hit the UP-UPUP-DOWN arrow keys in sequence

• Using the UP and DOWN arrows go to Chan 1 Cell: Standard. Ensure this channel is set to standard

• If not press the RIGHT arrow key and set to standard then press the ENTER key to return to the CALIBRATION menu

• Using the UP and DOWN arrows go to Chan 1 Cell. Ensure that the cell constant is set to 1.0

• If not press the RIGHT arrow key and set the cell constant to 1.0 then press the ENTER key to return to the CALIBRATION menu

• Using the UP and DOWN arrows go to Chan 1 Set:

Temperature and press the RIGHT arrow key to enter

the edit mode

• Adjust the temperature on the controller to match the actual temperature

• Press the ENTER key to save the input and return to the CALIBRATE menu

• Using the UP and DOWN arrows, go to the Chan 1 Set: Conductivity and press the RIGHT arrow key to enter the edit mode

• Adjust the conductivity on the controller to match the actual conductivity rating of the liquid

• Press the ENTER key to save the conductivity rating and return to the CALIBRATE menu

• When finished calibrating the controller, press the UP and DOWN key simultaneously to return to normal operating mode

Procedure to set purge setpoints on the conductivity controller

Note: Visit this webpage for additional documentation:

<http://www.gfsignettools.com/products/pdf/ 8860eng.pdf>

• Work with local water treatment expert to identify nominal purge and emergency purge conductivity value.

• Close the ball valve on the chemical treatment tree and remove the conductivity sensor from the tree.

• Enter Service test mode on the unit HI and energize the sump pump, ensuring the compressors are set to

“OFF”

• With the conductivity controller connected to the sensor and power, enter the CALIBRATE menu by holding down the enter key for 2 seconds

• When asked for the calibration key code, hit the UP-UPUP-DOWN arrow keys in sequence

• Using the UP and DOWN arrows, go to Relay 1 Setpoint: and press the RIGHT arrow key to enter edit mode (K1)

• Adjust the set point to the nominal blowdown conductivity value

• Press the ENTER key to return to the CALIBRATE menu

• Using the UP and DOWN arrows, go to Relay 2 Setpoint: and press the RIGHT arrow key to enter edit mode (K2)

• Adjust the set point to the emergency conductivity value

• Press the ENTER key to return to the CALIBRATE menu

• When finished setting the values, press the UP and DOWN key simultaneously to return to normal operating mode

Gas Heating Sequence of Operation

Standard Two Stage Gas Furnace

The control system for the rooftop units are wired to

ensure that the heating and cooling do not occur simultaneously. Refer to the wiring diagram that shipped with the unit while reviewing the following sequence of operation.

Honeywell Ignition System

When a heating requirement exists, the Rooftop Module

(RTM) starts the supply fan and sends a request for heat to the Heat Module.The Heat Module closes K1 contacts and starts the combustion blower motor (4B11).The combustion blower motor starts on low speed through the normally closed combustion blower relay (4K33) contacts.

The supply airflow switch (4S38) and the combustion air

switch (4S25) closes. Power is applied through the high

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limit cutout (4S26) to the Honeywell ignition control board (4U18).The ignition control board (4U18) starts a prepurge timing cycle. At the end of the pre-purge cycle, the ignition transformer (4T7) and the pilot solenoid valve (4L9) are energized. This starts a 10 second trial for pilot ignition.When the pilot flame is established and sensed by the flame sensing rod (4U19), stage 1 of the main gas valve (4L7) and the 60 seconds sequencing time delay relay (4DL6) is energized.

The system will operate in the low heat mode until there

is an additional call for heat is established by closing the K3 contacts on the Heat Module.

On DischargeTemperature Control systems, the sequencing time delay relay (4DL6) will energize the combustion blower motor relay (4K33) which switches the combustion blower motor to high speed and energizes the 2nd stage solenoid on the gas valve (4L7) after approximately 60 seconds.

If the flame rod (4U19) does not detect a pilot flame within the 10 second trial for ignition period, the control will lockout. If a flame failure occurs during operation, the gas valve (4L7), the sequencing time delay relay (4DL6), and the combustion blower relay (4K33) is de-energized. The system will purge and attempt to relight the pilot. If a flame is not detected after this attempt, the Honeywell ignition control (4U18) will lock out.The combustion blower motor will continue to operate as long as a heating demand exists and the system switch (4S24) is “On”.

Once the heating demand has been satisfied, the combustion blower and the Honeywell ignition control board (4U18) is de-energized.

Propane Gas

Units that operate on propane gas after 1990 have two (2) additional controls that affect the combustion blower motor operation and the sequence of the gas valve operation.

With the post purge time delay relay (4DL4), the additional

service switch (4S24), and the additional 115 volt control relay (4K31) installed, the sequence of operation is as follows:

Power is applied to the Honeywell ignition control board (4U18) through the high limit switch (4S26). The Honeywell ignition control board (4U18) will sequence through its pre-purge timing and pilot ignition sequence to

The post purge time delay relay (4DL4) delays the starting

of the combustion blower motor by approximately 60 seconds. Once the timing has elapsed, the combustion blower motor will start, closing the combustion air switch (4S25).

Energize the control relay (4K31) and the sequence time delay relay (4DL6). 24 volts is applied from the new service switch (4S24) through the normally open control relay (4K31) contacts to energize the 1st stage solenoid on the gas valve (4L7).

On an additional call for heat, the K3 contacts on the Heat Module will close to energize the combustion blower relay (4K33) which switches the combustion blower motor to high speed and closes its normally open contacts allowing 24 volts to energize the 2nd stage on the gas valve (4L7).

Once the heating demand has been satisfied, the Honeywell ignition control board (4U18) and the post purge time delay relay (4DL4) is de-energized. The combustion blower motor will continue to operate for approximately 15 seconds to purge the heat exchanger on the “Off” cycle.

Modulating Gas Sequence of Operation— Full and Limited Modulating Gas Furnace

The control system for the rooftop units are wired to

ensure that the heating and cooling do not occur simultaneously. Refer to the modulating heat wiring diagram that shipped with the unit while reviewing the following sequence of operation. As you review the sequence of operations, keep the following in mind:

• The furnace will not light unless the manual gas valves are open and the control circuit switch 4S24 is closed.

• The control systems are wired to ensure that heating and cooling cannot occur simultaneously.

• The unit supply fans must run continuously so air flow switch 4S38 will stay closed.

• Modulating Gas heat is available during both occupied and unoccupied operation.

Whenever there is a call for heat, 1U50-K1 energizes and

combustion blower motor 4B11 begins to operate at High speed on the 850 and 1000 MBH heaters.The blower will operate on low speed for the 500 MBH. A relay 4K119 in parallel with the main gas valve actuator control output, insures the actuator will be open prior to proof of flame.

This will force the combustion air actuator 4U82 to the

open position, causing the auxiliary switch on 4U82 to close.This insures complete purging of the combustion chamber during the 60 second purge cycle.

Ignition control IC board 4U18 will not energize, however, unless the supply air flow switch 4S38, combustion air flow switch 4S25, high limit cutout 4S26, the auxiliary switch on combustion air actuator 4U82 and the proof of closure switch on gas valve 4L22 are closed.These are all part of the safety interlock system.

With all these conditions satisfied, the IC board energizes

and initiates an internal 60 second pre-purge time delay.

When the pre-purge period expires, 4U18 energizes both

the ignition transformer 4T7 and solenoid 4L9 on the intermittent pilot valve. At that point, 4U18 gives electrode 4E1 approximately 10 seconds to establish a pilot flame. (The presence of this flame is proven by flame rod 4U19.)

If 4U18 does not detect a pilot flame at the end of this period, it will shut down and lock out the ignition / combustion circuit.

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If the pilot is ignited within 10 seconds, the IC board deenergizes the ignition transformer 4T7 and electrode 4E1. At this point, relay 4K119 will energize, starting the combustion air actuator and the furnace.The feedback signal from the discharge temperature sensor will cause the modulating output from the heat module to changethe damper position as required to maintain the outlet temperature within the desired band.

Flame Failure

In the event that IC board 4U18 loses the “proof-of-flame” input signal during furnace operation, it will make one attempt at reignite. If a flame is not reestablished within the 10 second trial period, 4U18 will shut down and lock out the ignition /combustion control circuit. (Combustion blower motor 4B11 continues to run as long as a heating requirement exists and control circuit switch 4S24 is ON.)

Once locked out on flame failure, the IC board will not reactivate the ignition/combustion control circuit until it is reset manually.To do this, press the reset button on the front of the IC board case.

A set of relay contacts are available for external use for heat fail (Information Only).

Note: The modulating gas heaters are factory adjusted

for the proper air/gas ratio at minimum and nameplate rated firing MBH for most areas in the country.

Electric Heat Sequence of Operation

The control system for the rooftop units are wired to

ensure that the heating and cooling do not occur simultaneously. Refer to the electric heat wiring diagrams that shipped with the unit while reviewing the following sequence of operation. As you review the sequence of operations, remember these points:

Whenever there is a call for heat, 1U50-K1 energizes.This

energizes HEAT 1 contactors 4K34 and 4K35 which, in turn, energize two of the six 4HR3 heating elements.

Note: Electric heater 4HR3 will only energize if both of the

heat section’s high limit safety controls—4S27 and 4S33—are closed.

• High limit Switch 4S27 will trip if exposed to a temperature of 133 + 5°F, and reset automatically once the temperature falls to 110 + 5°F. It is mounted on the control-box-side of the electric heat element assembly.

• Linear high limit 4S33 is encased in a capillary that extends across the unit’s supply air opening, and is anchored near the bottom of the heat section control box. It is designed to trip if the temperature across any 6" span of the capillary exceeds 185 + 10°F. Refer to

Table 67, p. 163 The HEAT 2 (4K36, 4K37) and HEAT 3

(4K38, 4K39) contactors are not energized unless the 1st stage bank of heating elements already operating are not satisfying the heating load.

Wet Heat Sequence of Operation

Electrical circuitry for units with steam or hot water heat is limited to the connections associated with the modulating valve actuator (4U15) and the freezestat (4S12).

Like the furnaces described earlier, SL/SH control systems are wired to ensure that simultaneous heating and cooling do not occur.The supply fan will cycle “On” and “Off” with each call for heat during both an occupied and unoccupied period.

Whenever there is a call for heat, 1U50-K3 energizes.This

allows a modulated voltage signal to be sent to the “Wet” heat actuator 4U15. Depending on the value of this signal, 4U15 regulates the flow of steam or hot water through the coil by positioning the valve stem at some point between fully closed 2 VDC and fully open (10 VDC).

Freeze Protection

A freezestat (4S12) is mounted inside the heat section of

SLH_ and SSH_ units to prevent the “wet” heat coil from freezing during the “Off” cycle.

If the temperature of the air leaving the heating coils falls to 40°F, the freezestat's normally-open contacts close, completing the heat fail circuit on the UCM. When this occurs:

a. The supply fan is turned “Off”.

b. “Wet” heat actuator 4U15 fully opens to allow hot

water or steam to pass through the heating coil and prevent freeze-up.

c. A “Heat Fail” diagnostic is displayed on the Human

Interface LCD screen.

For heating control settings and time delay specifications, refer to Table 67, p. 163.

Use the checklist provided below in conjunction with the

“General Unit Requirement” checklist to ensure that the

unit is properly installed and ready for operation. Be sure to complete all of the procedures described in this section before starting the unit for the first time.

• Turn the field supplied disconnect switch, located upstream of the rooftop unit, to the “Off” position.

WARNING

Hazardous Voltage!

• Turn the 115 volt control circuit switch 1S1 to the “Off” position. It is located in the secondary of the 1T1 transformer.

• Turn the 24 volt control circuit switch 1S70 to the “Off” position. It is located in the secondary of the 1T2 & 1T3 transformers.

RT-SVX36K-EN 93

Page 94

Unit Start Up

• Turn the “System” selection switch (at the Remote Panel) to the “Off” position and the “Fan” selection switch (if Applicable) to the “Auto” or “Off” position.

• Check all electrical connections for tightness and

“point of termination” accuracy.

• Verify that the condenser airflow will be unobstructed.

• Check the compressor crankcase oil level. Oil should be visible in the compressor oil sight glass.The oil level should be 1/2 to 3/4 high in the sight glass with the compressor “Off”.

• Verify that the compressor discharge service valve and the liquid line service valve is back seated on each circuit.

NOTICE:

Compressor Damage!

Do not allow liquid refrigerant to enter the suction line. Excessive liquid accumulation in the liquid lines may result in compressor damage. Compressor service valves must be fully opened before start-up (suction, discharge, liquid line, and oil line).

Do not start the unit in the cooling mode if the ambient temperature is below the following minimum recommended operating temperatures:

Standard unit with or without HGBP -

+55 F for 20 & 40Ton

+50 F for 25 & 30Ton

+45 F for 70 thru 130Ton

+35 F for 50 & 55Ton

+30 F for 60Ton

Units with Low Ambient option without HGBP - 0°F

Units with Low Ambient option with HGBP - +10°F

Note: To prevent compressor damage due to no

refrigerant flow, do not pump the system down with the compressor(s) below 25 PSIG under any circumstance.

• Check the supply fan belts for proper tension and the fan bearings for sufficient lubrication. If the belts require adjustment, or if the bearings need lubricating, refer to the Service/Maintenance section of this manual for instructions.

• Inspect the interior of the unit for tools and debris. Install all panels in preparation for starting the unit.

Electrical Phasing

Unlike traditional reciprocating compressors, scroll compressors are phase sensitive. Proper phasing of the electrical supply to the unit is critical for proper operation and reliability. Color paint dots on the terminal block should match that of the associated wire attached to the lug.

The compressor motor is internally connected for

clockwise rotation with the incoming power supply phased as A, B, C.

Proper electrical supply phasing can be quickly determined and corrected before starting the unit by using an instrument such as an Associated Research Model 45 Phase Sequence Indicator and following the steps below:

WARNING

Hazardous Voltage!

• Turn the field supplied disconnect switch that provides power to terminal block 1TB1 or to the unit mounted disconnect switch 1S14 to the “Off” position.

• Connect the phase sequence indicator leads to the terminal block or unit mounted disconnect switch as follows;

Table 41.

Phase sequence leads Unit power terminal

Black (Phase A) L1

Red (Phase B) L2

Yellow (Phase C) L3

WARNING

Live Electrical Components!

• Close the disconnect switch or circuit protector switch that provides the supply power to the unit's terminal block 1TB1 or the unit mounted disconnect switch 1S14.

HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1S14.

• Observe the ABC and CBA phase indicator lights on the face of the sequencer.TheABC indicator light will glow if the phase is ABC. If the CBA indicator light glows, open the disconnect switch or circuit protection switch and reverse any two power wires.

• Restore the main electrical power and recheck the phasing. If the phasing is correct, open the disconnect switch or circuit protection switch and remove the phase sequence indicator.

94 RT-SVX36K-EN

Page 95

Voltage Supply and Voltage Imbalance

Voltage Supply

Electrical power to the unit must meet stringent requirements for the unit to operate properly. Measure each leg (phase-to-phase) of the power supply. Each reading must fall within the utilization range stamped on the unit nameplate. If any of the readings do not fall within the proper tolerances, notify the power company to correct this situation before operating the unit.

Voltage Imbalance

Excessive three phase voltage imbalance between phases will cause motors to overheat and eventually fail.The maximum allowable voltage imbalance is 2%. Measure and record the voltage between phases 1, 2, and 3 and calculate the amount of imbalance as follows:

% Voltage Imbalance =

100 X AV - VD where;

Unit Start Up

AV (Average V oltage) =

Volt 1 + Volt 2 + Volt 3

V1, V2, V3 = Line Voltage Readings

VD = Line Voltage reading that deviates the farthest from

the average voltage.

Example: If the voltage readings of the supply power measured 221, 230, and 227, the average volts would be:

221 + 230 + 227

= 226 Avg.

VD (reading farthest from average) = 221

The percentage of Imbalance equals:

100 X 226 - 221

226

= 2.2%

The 2.2% imbalance in this example exceeds the

maximum allowable imbalance of 2.0%. This much imbalance between phases can equal as much as a 20% current imbalance with a resulting increase in motor winding temperatures that will decrease motor life. If the voltage imbalance is over 2%, notify the proper agencies to correct the voltage problem before operating this equipment.

RT-SVX36K-EN 95

Page 96

Unit Start Up

Heat Stages Compressor Stage

1231234

COMPONENT CONFIGURATION

20 Ton - Air Cooled

CONDENSER FANS

Fans

Condenser

40 Ton - Air Cooled

25 - 30 Ton - Air Cooled

2A-Off/2B-Off

Fan

Exhaust

Fan

Return

Fan

Supply

50 Ton - Air Cooled

2A-On/2B-Off

2A-Off/2B-On

2A-Off/2B-Off

2A-On/2B-Off

60 - 75 Ton - Air Cooled

2A-Off/2B-On

2A-Off/2B-Off

90 Ton - Air Cooled

2A-On/2B-Off

2A-Off/2B-On

2A-Off/2B-Off

105 & 115 Ton - Air Cooled

2A-On/2B-Off

2A-Off/2B-On

2A-Off/2B-Off

2A-On/2B-Off

A-2B1 OFF OFF OFF A-On/B-Off OFF OFF OFF OFF OFF OFF OFF

Component

SUPPLY FAN ON ON OFF ALL OFF OFF OFF OFF OFF OFF OFF OFF

Being Tested

B-2B2 OFF OFF OFF A-Off/B-On OFF OFF OFF OFF OFF OFF OFF

B-2B2/2B3 OFF OFF OFF A-Off/B-On OFF OFF OFF OFF OFF OFF OFF

1A-2B1 OFF OFF OFF 1A-On/1B-Off OFF OFF OFF OFF OFF OFF OFF

1B-2B2 OFF OFF OFF 1A-Off/1B-On OFF OFF OFF OFF OFF OFF OFF

Table 42. Service test guide for component operation — Part I of II

96 RT-SVX36K-EN

2A-2B4 OFF OFF OFF 1A-Of/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B-2B5 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

1A-2B1 OFF OFF OFF 1A-On/1B-Off OFF OFF OFF OFF OFF OFF OFF

1B-2B2/2B3 OFF OFF OFF 1A-Off/1B-On OFF OFF OFF OFF OFF OFF OFF

2A-2B4 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B-2B5/2B6 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

1A-2B1 OFF OFF OFF 1A-On/1B-Off OFF OFF OFF OFF OFF OFF OFF

1B-2B2/2B3 OFF OFF OFF 1A-Off/1B-On OFF OFF OFF OFF OFF OFF OFF

2A-2B4 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B-2B5/2B6 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

1A-2B3/2B14 OFF OFF OFF 1A-On/1B-Off OFF OFF OFF OFF OFF OFF OFF

1B-2B1/2B2 OFF OFF OFF 1A-Off/1B-On OFF OFF OFF OFF OFF OFF OFF

2A-2B6/2B13 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B-2B4/2B5 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

1A-2B3/2B14 OFF OFF OFF 1A-On/1B-Off OFF OFF OFF OFF OFF OFF OFF

1B-2B1/2B2/2B19 OFF OFF OFF 1A-Off/1B-On OFF OFF OFF OFF OFF OFF OFF

2A-2B6/2B13 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B-2B4/2B5/2B15 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

Page 97

Unit Start Up

Heat Stages Compressor Stage

1231234

COMPONENT CONFIGURATION

130 Ton - Air Cooled

20 - 30 Ton

COMPRESSOR

Fans

Condenser

Fan

Exhaust

Fan

Return

Fan

Supply

Component

Being Tested

Table 42. Service test guide for component operation — Part I of II (continued)

2A-Off/2B-On

2A-Off/2B-Off

1A-2B3/2B14 OFF OFF OFF 1A-On/1B-Off OFF OFF OFF OFF OFF OFF OFF

2A-On/2B-Off

2A-Off/2B-Off

OFF OFF OFF 1A-Off/1B-On OFF OFF OFF OFF OFF OFF OFF

2B20

1B-2B1/2B2/2B19/

2A-Off/2B-On

OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B21

2A-2B6/2B13 OFF OFF OFF 1A-Off/1B-Off OFF OFF OFF OFF OFF OFF OFF

2B-2B4/2B5/2B15/

24, 29, 36, 48, 59, 73, 80, 89 Ton - Evaporative Condensing

ON ON OFF ALL OFF ON ON N/A OFF OFF OFF OFF

1A OFF OFF OFF 1A On 100% OFF OFF OFF OFF OFF OFF OFF

RETURN FAN ON ON N/A ALL OFF OFF OFF OFF OFF OFF OFF OFF

EXHAUST FAN OFF N/A ON ALL OFF OFF OFF OFF OFF OFF OFF OFF

ON ON OFF ALL OFF ON OFF N/A OFF OFF OFF OFF

STAGE 1

GAS HEAT

(Full Capacity)

STAGE 2 ON ON OFF ALL OFF OFF ON N/A OFF OFF OFF OFF

(High Fire

Adjustment)

FULL MODULATING ON ON OFF ALL OFF 5% Select OFF OFF OFF OFF

(Low Fire

LIMITED

Adjustment)

ON ON OFF ALL OFF 90% Select OFF OFF OFF OFF

ON ON OFF ALL OFF 33% Select OFF OFF OFF OFF

LIMITED

(High Fire

Adjustment)

MODULATING

Stage 1 ON ON OFF ALL OFF ON OFF OFF OFF OFF OFF OFF

(Low Fire

Adjustment)

ELECTRIC HEAT ON ON OFF ALL OFF ON ON ON OFF OFF OFF OFF

Stage 2 ON ON OFF ALL OFF OFF ON OFF OFF OFF OFF OFF

Stage 3 ON ON OFF ALL OFF OFF OFF ON OFF OFF OFF OFF

HYDRONIC HEAT OFF OFF OFF ALL OFF 100% Select OFF OFF OFF OFF

PRE-HEATER OFF OFF OFF ALL OFF ON N/A N/A OFF OFF OFF OFF

OFF OFF OFF ALL OFF 100% Select OFF OFF OFF OFF

REHEAT

EXHAUST

DAMPERS

OUTSIDE AIR

Cooling Valve OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

Reheat Valve OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

EVAP COND

Pumpout Solenoid OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

Sump Pump OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

A ON OFF OFF A-Off/B-On OFF OFF OFF K10-On K11-Off N/A N/A

Sump Heater OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

RT-SVX36K-EN 97

B ON OFF OFF A-On/B-Off OFF OFF OFF K10-Off K11-On N/A N/A

Page 98

Unit Start Up

Heat Stages Compressor Stage

1231234

OFF OFF OFF K11-On K3-Off K12-Off K4-Off

OFF OFF OFF K11-On K3-Off K12-On K4-Off

OFF OFF OFF K11-Off K3-On K12-Off K4-Off

OFF OFF OFF K11-Off K3-On K12-Off K4-On

OFF OFF OFF K11-On K3-Off K12-Off K4-Off

OFF OFF OFF K11-On K3-Off K12-On K4-Off

40 - 60 Ton

COMPONENT CONFIGURATION

70 - 90Ton

Fans

Condenser

1A-Off/1B-On

1A-On/1B-Off

2A-Off/2B-On

2A-On/2B-Off

1A-Off/1B-On

2A-Off/2B-Off

1A-Off/1B-Off

2A-Off/2B-Off

1A-On/1B-Off

2A-Off/2B-Off

Fan

Exhaust

Fan

Return

Fan

Supply

OFF OFF OFF K11-Off K3-On K12-Off K4-Off

2A-Off/2B-On

1A-Off/1B-Off

OFF OFF OFF K11-Off K3-On K12-Off K4-On

105 - 130 Ton

2A-On/2B-Off

1A-Off/1B-On

1A-Off/1B-Off

OFF OFF OFF K11-Off K3-On K12-Off K4-Off

OFF OFF OFF K11-Off K3-On K12-Off K4-On

1A-On/1B-Off

2A-Off/2B-Off

OFF OFF OFF K11-On K3-Off K12-Off K4-Off

2A-Off/2B-On

1A-Off/1B-Off

OFF OFF OFF K11-On K3-Off K12-On K4-Off

2A-On/2B-Off

1A-Off/1B-Off

damage may occur.

1A ON OFF OFF

Component

Being Tested

1B ON OFF OFF

2A ON OFF OFF

2B ON OFF OFF

1A ON OFF OFF

Table 42. Service test guide for component operation — Part I of II (continued)

98 RT-SVX36K-EN

1B ON OFF OFF

2A ON OFF OFF

2B ON OFF OFF

1A ON OFF OFF

1B ON OFF OFF

2A ON OFF OFF

2B ON OFF OFF

1. Compressors for the 20 thru 30 Ton units can operate individually or together and in any order while in the SERVICE TEST mode.

2. Compressors 1A &1B and compressors 2A & 2B operate simultaneously within their respective circuits on the 40 thru 75 Ton units. There is no 1B compressor for variable speed.

3. Condenser fan outputs can operate individually or together and in any order while in the SERVICE TEST mode.

4. Once the unit has started, refer to the Status Menu in the Human Interface for the OA CFM.

Notes:

5. RTM OCC/UNOCC output in the Service Test Mode must be in the unoccupied mode to open the system VAV boxes or to drive the VFD to 100%.

IMPORTANT: Do not operate the compressors without the supply and condenser fans; low suction or high head pressure will develop and compressor

Page 99

Unit Start Up

Table 43. Service test guide for component operation — Part II of II

Component

Being Tested

A Closed Closed 0% Default OFF OFF OFF OFF B Closed Closed 0% Default OFF OFF OFF OFF

1A Closed Closed 0% Default OFF OFF OFF OFF 1B Closed Closed 0% Default OFF OFF OFF OFF 2A Closed Closed 0% Default OFF OFF OFF OFF 2B Closed Closed 0% Default OFF OFF OFF OFF

1A Closed Closed 0% Default OFF OFF OFF OFF 1B Closed Closed 0% Default OFF OFF OFF OFF

2A Closed Closed 0% Default OFF OFF OFF OFF 2B Closed Closed 0% Default OFF OFF OFF OFF

1A & 1B Closed Closed 0% Default OFF OFF OFF OFF 2A & 2B Closed Closed 0% Default OFF OFF OFF OFF

A-2B1 Closed Closed 0% Default OFF OFF OFF OFF B-2B2 Closed Closed 0% Default OFF OFF OFF OFF

A-2B1 Closed Closed 0% Default OFF OFF OFF OFF

B-2B2/2B3 Closed Closed 0% Default OFF OFF OFF OFF

1A-2B1 Closed Closed 0% Default OFF OFF OFF OFF 1B-2B2 Closed Closed 0% Default OFF OFF OFF OFF 2A-2B4 Closed Closed 0% Default OFF OFF OFF OFF 2B-2B5 Closed Closed 0% Default OFF OFF OFF OFF

1A-2B1 Closed Closed 0% Default OFF OFF OFF OFF

1B-2B2/2B3 Closed Closed 0% Default OFF OFF OFF OFF

2A-2B4 Closed Closed 0% Default OFF OFF OFF OFF

2B-2B5/2B6 Closed Closed 0% Default OFF OFF OFF OFF

1A-2B1 Closed Closed 0% Default OFF OFF OFF OFF

1B-2B2/2B3 Closed Closed 0% Default OFF OFF OFF OFF

2A-2B4 Closed Closed 0% Default OFF OFF OFF OFF

2B-2B5/2B6 Closed Closed 0% Default OFF OFF OFF OFF

1A-2B3/2B14 Closed Closed 0% Default OFF OFF OFF OFF

1B-2B1/2B2 Closed Closed 0% Default OFF OFF OFF OFF

2A-2B6/2B13 Closed Closed 0% Default OFF OFF OFF OFF

2B-2B4/2B5 Closed Closed 0% Default OFF OFF OFF OFF

1A-2B3/2B14 Closed Closed 0% Default OFF OFF OFF OFF

1B-2B1/2B2/2B19 Closed Closed 0% Default OFF OFF OFF OFF

2A-2B6/2B13 Closed Closed 0% Default OFF OFF OFF OFF

2B-2B4/2B5/2B15 Closed Closed 0% Default OFF OFF OFF OFF

1A-2B3/2B14 Closed Closed 0% Default OFF OFF OFF OFF

1B-2B1/2B2/2B19/2B20 Closed Closed 0% Default OFF OFF OFF OFF

2A-2B6/2B13 Closed Closed 0% Default OFF OFF OFF OFF

2B-2B4/2B5/2B15/2B21 Closed Closed 0% Default OFF OFF OFF OFF

1A Closed Closed 100% Default OFF OFF OFF OFF

Component Configuration Occ

Econo

Damper

Exhaust Damper

VFD

Output

COMPRESSOR

20 - 30 Ton

40 - 60 Ton

70 - 105 Ton

115 - 130 Ton

CONDENSER FANS

20 Ton

25 - 30 Ton

40 Ton

50 Ton

60 - 75 Ton

90 Ton

105 & 115 Ton

130 Ton

24, 29, 36, 48, 59, 73, 80, 89 Ton

Unocc

Relay

Reheat

Sump Pump

Sump

Heater

Dolphin

SUPPLY FAN Closed Closed 100% Unocc OFF OFF OFF OFF

RETURN FAN Closed Closed 100% Unocc OFF OFF OFF OFF

EXHAUST FAN Closed Closed 100% Default OFF OFF OFF OFF

GAS HEAT

(Full Capacity)

STAGE 1

STAGE 2

(High Fire Adjustment)

Closed Closed 100% Unocc OFF OFF OFF OFF

RT-SVX36K-EN 99

Page 100

Unit Start Up

Table 43. Service test guide for component operation — Part II of II (continued)

Component

Being Tested

FULL MODULATING Closed Closed 100% Unocc OFF OFF OFF OFF

(Low Fire Adjustment)

LIMITED MODULATING Closed Closed 100% Unocc OFF OFF OFF OFF

(High Fire Adjustment)

LIMITED MODULATING Closed Closed 100% Unocc OFF OFF OFF OFF

(Low Fire Adjustment)

ELECTRIC HEAT Closed Closed 100% Unocc OFF OFF OFF OFF

Stage 1

Stage 2

Stage 3

HYDRONIC HEAT Closed Closed 0% Default OFF OFF OFF OFF

PRE-HEATER Closed Closed 0% Default OFF OFF OFF OFF

OUTSIDE AIR DAMPERS

EXHAUST DAMPERS 100% 100% 0% Default OFF OFF OFF OFF

REHEAT

Cooling Valve Closed Closed 0% Default 100-0 OFF OFF OFF Reheat Valve Closed Closed 0% Default 0-100 OFF OFF OFF

Pumpout Solenoid Closed Closed 0% Default ON OFF OFF OFF

EVAP COND

Sump Pump Closed Closed 0% Default OFF ON OFF ON

Sump Heater Closed Closed 100% Default OFF OFF ON OFF

Component Configuration Occ

Econo

Damper

Closed Closed 100% Unocc OFF OFF OFF OFF

100% Closed 0% Default OFF OFF OFF OFF

Open

Exhaust Damper

Open

VFD

Output

Unocc

Relay

Reheat

Sump Pump

Sump

Heater

Dolphin

Note: See Service test guide notes, p. 98.

Important: Do not operate the compressors for extended periods of time without the condenser fans; high head

pressure will develop.

Table 44. Service test guide component operation—evaporative condenser

Component Being Tested Requirements (ON) Requirements (OFF)

Compressors Sump minimum level switch must be closed for a minimum of five minutes No Requirements Sump Pump Sump minimum level switch must be closed for a minimum of five minutes No Requirements Condenser Fans No Requirements No Requirements Fill Valve Relay No Requirements No Requirements Drain Valve Actuator No Requirements No Requirements Sump Heater No Requirements No Requirements

Notes:

1. Sump freeze protection is active during AUTO but is inactive in service test modes (head pressure control set to MANUAL).

2. Water treatment drain request will be ignored in service test.

100 RT-SVX36K-EN

Trane SAHL40, SAHL50, SAHL55, SAHL60, SAHL70 Installation, Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual