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

...

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

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.

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

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

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

RT-SVX36K-EN 5

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

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

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

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

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

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.

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.

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

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

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

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.

16 RT-SVX36K-EN

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

RT-SVX36K-EN 17

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.

18 RT-SVX36K-EN

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.

RT-SVX36K-EN 19

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

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

RT-SVX36K-EN 21

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.

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

RT-SVX36K-EN 23

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

Figure 12. eFlex variable speed compressor, IntelliPak controller sequences

General Information

RT-SVX36K-EN 25

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

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

RT-SVX36K-EN 27

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

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

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

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