Trane IntelliPak Self-Contained Modu User Manual

Installation, Owner, and Diagnostic Manual

IntelliPak

Commercial Self-Contained Modular Series, 20-35 Ton

Models

“BO” and later Design Sequence

SCWG -020, -025, -030, -035 SIWG -020, -025, -030, -035

SCRG -020, -025, -032 SIRG -020, -025, -032

July 2000

SCXG-SVX01B-EN

General Information

About This Manual Literature Change History

Use this manual for commercial selfcontained models SCWG, SIWG, SCRG, and SIRG. This is the original issue of this manual. It provides specific installation, owner maintenance, and diagnostic troubleshooting instructions for “BO” and later design sequences. The “BO” design sequence includes the VFD option change from Square D Altivar 66 to Altivar 58. For information on previous design sequences, contact your local Trane representative.

Warnings and Cautions

Warnings in this manual indicate potential hazardous situations that can result in death or serious injury.

Cautions in this manual indicate potential hazardous situations that may result in minor or moderate injury and/or equipment damage.

Examples:

WARNING

Disconnect electrical power source before servicing unit to prevent injury or death from electrical shock.

ECEM = Exhaust/comparative enthalpy module F/A = Fresh air GBAS = Generic building automation system HGBP = Hot gas bypass HI = Human Interface HVAC = Heating, ventilation and air conditioning IGV = Inlet guide vanes I/O = Inputs/outputs IOD= Installation/owner/diagnostic manual IPC = Interprocessor communications IPCB = Interprocessor communications bridge LH = Left-hand MCM = Multiple compressor module MWU = Morning warmup NSB = Night setback O/A = Outside air psig = Pounds-per-square-inch, gauge pressure R/A = Return air RH = Right-hand RPM = Revolutions-per-minute S/A = Supply air SCM = Single circuit module SZ = Single-zone (unit airflow) TCI = Tracer UCM = Unit control modules VAV = Variable air volume VCM = Ventilation control module VOM = Ventilation override module w.c. = Water column WSM = Waterside module ZSM = Zone sensor module

communications module





CAUTION



Use only copper conductors for electrical unit connections to prevent equipment damage.

Common HVAC Acronyms

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

BAS = Building automation systems CFM = Cubic-feet-per-minute CKT. = Circuit CV = Constant volume CW = Clockwise CCW = Counterclockwise E/A = Exhaust air

©American Standard Inc. 2000 SCXG-SVX01B-EN

Special Note on Refrigeration Emissions

World environmental scientists have concluded that ozone in our upper atmosphere is being reduced due to the release of CFC fully halogenated compounds.

The Trane Company urges all HVAC service personnel to make every effort to prevent any refrigerant emissions while installing, operating, or servicing equipment. Always conserve refrigerants for continued use.

Contents

Cross reference to related publications/information:

IntelliPak® Self-Contained Programming Guide, PKG-SVP01B-EN Remote Air-Cool-Condenser Installation, Owner, and Diagnostic Manual, CXRCSVX01A-EN

Installation

General Information Pre-installation Considerations Dimensions/Weights Mechanical Requirements Electrical Requirements Pre-Startup Requirements

Programming

Startup

Owner

General Information Sequence of Operation Maintenance

Diagnostic Troubleshooting

Troubleshooting Diagnostics

2 2

33 37

39 64

74 77

77 91

98 111 111

112

SCXG-SVX01B-EN 3

General

Modular Series Self-Contained Unit Components

Commercial self contained units are complete HVAC systems used in floor-byfloor applications. Units are easy to install because they feature a single point power connection, factory installed and tested controls, single water point connection, factory installed options, and an internally trapped drain connection. Modular self-contained units can ship as split-apart units for installation ease. Splitapart units ship with a dry nitrogen charge and require field refrigerant charging.

Units consist of multiple compressors, water-cooled condensers (water-cooled units only), an evaporator coil, dual forward curved fans, and control panel. Air-cooled units require a remote aircooled condenser, model CXRC. The hermetically sealed 3-D scroll compressor motors utilize internal motor protection and time delays to prevent excessive cycling. Unit controls are either an electromechanical thermostat or microprocessor controls on the IntelliPak unit. See Figure I-GI-1 for a typical unit.

The hermetically sealed 3-D scroll compressor motors utilize internal motor protection and time delays to prevent excessive cycling.

The water-cooled condensers are shell and tube type with an internal subcooler. Condensers are available as mechani-

Installation

cally or chemically cleanable. The evaporator fan is double width, double inlet and forward curved with a fixed pitch belt drive assembly. Frequency drives or inlet guide vanes are optional. Motor options are standard efficiency open drip proof (ODP) or totally enclosed fan cooled (TEFC); or premium efficiency ODP.

All water-cooled units ship with a full refrigerant and oil charge. Air-cooled units ship with oil and a dry nitrogen holding charge and require field-piping refrigerant connections to the air cooled

Information

condensing unit. Also, air-cooled units have two refrigerant circuits. Watercooled units have four refrigerant circuits; which include a filter drier, pressure relief valve, liquid line service valve, sight glass/ moisture indicator, thermal expansion valve with a sensing bulb and external equalizing line, discharge line shrader valve, a suction line shrader valve, and high and low pressure cutout switches. Water-cooled units also include a liquid line service valve for each circuit.

For more detailed information, see the Owner’s section of this manual.

Figure I-GI-1. IntelliPak® commercial self-contained Modular Series unit.

4 SCXG-SVX01B-EN

General

Installation

Control Options

Units can have either a thermostat control or IntelliPak network.

IntelliPak

Standard controls supplied with the IntelliPak interface (HI) panel with unit control module (UCM), hi/lo inlet air temperature sensor, and frost protection. All setup parameters are preset from the factory.

Human Interface Panel

The HI is unit mounted and accessible without opening the unit’s front panel. It allows easy setpoint adjustment using the HI keypad. In addition, the HI displays all unit operating parameters and conditions in a clear language display, which can be configured for either English, French, or Spanish.

The optional remote human interface (RHI) will control up to four self-contained units, each containing an interprocessor communications bridge (IPCB). It has all the same features as the unit-mounted HI except for the service mode.

For more information on setpoint defaults and ranges and unit programming, see the

ming Guide, PKG-SVP01B-EN

ships with each unit.

Unit Control Module

The UCM provides “smart” unit control with safety features and control relays for pumps, dampers, etc. The Modular Series IntelliPak® self-contained unit is controlled by a microelectronic control system that consists of a network of modules. These modules are referred to

Unit Controls

unit include the human

IntelliPak® Self-Contained Program-

UCM control

. A copy

Information

as unit control modules (UCM). In this manual, the acronym UCM refers to the entire control system network.

These modules perform specific unit functions using proportional/integral control algorithms. They are mounted in the unit control panel and are factory wired to their respective internal components. Each module receives and interprets information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request; i.e., economizing, mechanical cooling, heating, ventilation. See the Owner’s section of this manual for a detailed description of each module’s function.

Optional Controls

Optional controls include a disconnect switch, dirty filter switch, water flow switch (water-cooled only), supply air temperature reset, or external setpoint inputs. Night heat/morning warmup is available with electric, steam, or hot water heat control options.

The static pressure probe, zone night heat/morning warm up, supply air temperature reset sensor options ship separate inside the unit control panel for field installation. For more detailed information on the unit control options, see the Owner’s section of this manual.

Unit Nameplate

The unit nameplate identifies the unit model number, appropriate service literature, and wiring diagram numbers. It is mounted on the left end of the unit control panel.

SCXG-SVX01B-EN 5

General

Installation

Information

Model Number Description

Each self-contained unit has a multiple character model number unique to that unit. To determine a unit’s specific options, reference the model number on the unit nameplate using the model number explanation below.

S C W G N 20 4 2 BO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 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

Digit 1 - Unit Model

S = Self Contained

Digit 2 - Unit Type

C = Commercial I = Industrial

Digit 3 - Condenser Medium

W = Water-Cooled R = Remote Air-Cooled

Digit 4 - Development Sequence

G = Modular Series

Digit 5 - Refrigerant Circuit Configuration

N = Independent

Digit 6, 7 - Unit Nominal Capacity

2 0 = 20 Tons (Water or Air Cooled) 2 5 = 25 Tons (Water or Air Cooled) 30 = 30 Tons (Water Cooled Only) 32 = 32 Tons (Air Cooled Only) 35 = 35 Tons (Water Cooled Only)

Digit 8 - Unit Voltage

6 = 200 Volt/60 Hz/3 ph 4 = 460 Volt/60 Hz/3 ph 5 = 575 Volt/60 Hz/3 ph

Digit 9 - Air Volume/Temp Control

1 = I-Pak & IGV and Supply Air Temp

Ctrl

2 = I-Pak & VFD and Supply Air

Temp Ctrl

3 = I-Pak & VFD w/ Bypass and

Supply Air Temp Ctrl

4 = I-Pak w/o Vol. CTRL, w/ Zone Temp

Cool

5 = I-Pak w/o Vol. CTRL, w/ Zone Temp

Heat/Cool

6 = I-Pak w/o Vol. CTRL, w/ Supply Air

Temp Ctrl 8 = Thermostat Interface 9 = Thermostat Interface w/Anti-Short

Cycle Timer A = Thermostat Interface w/

Compressor Start Delay B = Thermostat Interface w/Anti-Short

Cycle Timer and Comp. Start Delay

Digit 10, 11 - Design Sequence

BO = “B” Design

Digit 12 - Unit Construction

A = Vertical Discharge B = Vertical Discharge with Double Wall

C = Horizontal Discharge D = Horizontal Discharge w/ Double

Wall E = Vertical Discharge, Ship Separate F = Vertical Discharge w/ Double Wall,

Ship Separate G = Horizontal Discharge, Ship Separate H = Horizontal Discharge w/ Double

Wall, Ship Separate

Digit 13 - Plenum Type

B = Std Plenum w/ Factory Cut Holes C = Low Plenum w/ Factory Cut Holes E = Std Plenum w/ Field Cut Holes F = Low Plenum w/ Field Cut Holes H = Std Plenum Double Wall (Perf)

w/ Field Cut Holes J = Low Plenum Double Wall (Perf)

w/ Field Cut Holes L = Std. Plenum w/Factory Cut Holes,

Ship Separate M = Low Plenum with Factory Cut

Holes, Ship Separate P = Std Plenum w/ Field Cut Holes, Ship

Separate R = Low Plenum w/ Field Cut Holes,

Ship Separate U = Std Plenum Double Wall (Perf) w/

Field Cut Holes, Ship Separate V = Low Plenum Double Wall (Perf) w/

Field Cut Holes, Ship Separate 0 = Without Plenum

Digit 14 - Motor Type

1 = Std. Efficiency ODP 2 = Premium Eff. ODP 3 = Std. Efficiency Totally Enclosed

Digit 15, 16 - Motor HP

05 = 5 HP Motor 07 = 7.5 HP Motor 10 = 10 HP Motor 15 = 15 HP Motor 20 = 20 HP Motor 25 = 25 HP Motor

Digit 17, 18, 19 - Fan RPM

085 = 850 rpm 090 = 900 rpm 095 = 950 rpm 100 = 1000 rpm 105 = 1050 rpm 110 = 1100 rpm

115 = 1150 rpm 120 = 1200 rpm 125 = 1250 rpm 130 = 1300 rpm 135 = 1350 rpm 140 = 1400 rpm 145 = 1450 rpm 150 = 1500 rpm 155 = 1550 rpm 160 = 1600 rpm 165 = 1650 rpm 170 = 1700 rpm 175 = 1750 rpm 180 = 1800 rpm 185 = 1850 rpm

Digit 20 - Heating Type

A = Steam Coil, LH B = Hot Water Coil, LH C = Electric Heat, 1 Stage F = Hydronic Heat Ctrl Interface G = Elec. Heat Ctrl Interface, 1 stage K = Steam Coil Ship Separate, LH L = Hot Water Coil Ship Separate, LH M = Steam Coil, RH N = Hot Water Coil, RH P = Steam Coil Ship Separate, RH R = Hot Water Coil Ship Separate, RH 0 = None

Digit 21 - Unit Isolators

A = Isopads B = Spring Isolators 0 = None

Digit 22 - Unit Finish

1 = Paint - Executive Beige 2 = Protective Coating 3 = Protective Coating w/ Finish Coat

Digit 23

0 = None

Digit 24 - Unit Connection

1 = Disconnect Switch 2 = Terminal Block 3 = Dual Point Power

Digit 25 - Industrial Options

A = Protective Coated Evaporator Coil B = Silver Solder C = Stainless Steel Screws D = A and B E = A and C

6 SCXG-SVX01B-EN

General

Installation

F = B and C G = A, B and C 0 = None

Digit 26 - Drain Pan Type

A = Galvanized Sloped B = Stainless Steel Sloped

Digit 27 - Waterside Economizer

A = Mechanical Clean Full Cap. (4-row) B = Mechanical Clean Low Cap. (2-row) C = Chemical Clean Full Cap. (4-row) D = Chemical Clean Low Cap. (2-row) E = Mechanical Clean Full Capacity

(4-row) Ship Separate

F = Mechanical Clean Low Capacity

(2-row) Ship Separate

G = Chemical Clean Full Capacity

(4-row) Ship Separate

H = Chemical Clean Low Capacity

(2-row) Ship Separate

0 = None

Digit 28 - Ventilation Control

B = Airside Econ w/ Traq

(Top O/A Inlet)

C = Airside Econ w/ Standard

Dampers (Top O/A Inlet)

E = Airside Econ w/ Traq™ Damper and

Comparative Enthalpy (Top O/A Inlet)

F = Airside Econ w/ Std Dampers and

Comparative Enthalpy (Top O/A Inlet)

G = Traq Damper Ventilation Interface

™

Damper

Self-Contained Ship-With Accessory Model Number Description

P S W G S A 1 1 0 AO 1 2 3 4 5 6 7 8 9 10 11

Digit 1 - Parts/Accessories

P = Parts/Accessories

Digit 2 - Unit Model

S= Self-Contained

Digit 3 - Shipment

W = With Unit

Digit 4 - Development Sequence

F = Signature Series G = Modular Series

Digit 5 - Sensors and Other Accessories

S = Sensors

Digit 6 - Sensors and Thermostats (field installed)

A = BAYSENS017 - Zone Temp Only (C V and VAV) B = BAYSENS013 - Zone Temp with Timed Override Button (CV and VAV)

H = Ventilation For 2 Pos. Cntrl Interface 0 = None

Digit 29 - Water Piping

A = Right Hand Condenser Connection B = Left Hand Condenser Connection C = Right Hand Basic Piping D = Left Hand Basic Piping E = Right Hand Intermediate Piping F = Left Hand Intermediate Piping J = Right Hand Basic w/ Flow Switch K = Left Hand Basic w/ Flow Switch L = Right Hand Intermediate

w/ Flow Switch

M = Left Hand Intermediate

w/ Flow Switch

0 = None

Digit 30 - Condenser Tube Type

A = Standard Condenser Tubes B = 90/10 CuNi Condenser Tubes 0 = None

Digit 31 - Compressor Service Valves

1 = With Service Valves 0 = None

Digit 32 - Miscellaneous System Control

1 = Timeclock 2 = Interface for Remote HI 3 = Dirty Filter Switch 4 = 1 and 2 5 = 1 and 3 6 = 2 and 3 7 = 1, 2, and 3 0 = None

C = BAYSENS014 - Zone Temp with Timed Override Button, Setpoint Dial (CV and VAV) D = BAYSENS023 - Remote Min. Position Potentiometer Control (OA Damper) E = BAYSENS008 - CV Zone Sensor F = BAYSENS010 - CV Zone Sensor with Indicator Lights G = BAYSENS019 - CV Programmable Night Setback Sensor H = BAYSENS021 - VAV Zone Sensor with Indicator Lights J = BAYSENS020 - VAV Programmable Night Setback Sensor K = Remote Sensor Kit L = Outside Air Temperature Sensor Kit M = Outside Air Humidity Sensor Kit N = BAYSTAT010 - 2 Heat/2 Cool Thermostat

Information

Digit 33 - Control Interface Options

A = Generic BAS Module (GBAS) B = Ventilation Override Module (VOM) C = Tracer Comm. Interface Module (TCI) D= Remote Human Interface (RHI) E= GBAS and TCI F= VOM and TCI G = GBAS and VOM H = GBAS and RHI J = VOM and RHI K = TCI and RHI L = GBAS, VOM, and TCI M = GBAS, VOM, and RHI N = GBAS, TCI, and RHI P = VOM, TCI, and RHI R = GBAS, VOM, TCI, and RHI 0 = None

Digit 34 - Agency

T = UL Agency Listing 0 = None

Digit 35 - Filter Type

1 = 2-inch Construction Throwaway 2 = 2-inch Med Eff. Throwaway

Digit 36 - Miscellaneous Control Option

A = Low Entering Air Temp. Protect

Device (LEATPD) B = High Duct Temp T-Stat C = Plenum High Static Switch D = Kit for Heat Mode Output (w/t’stat) E = A and B F = A and C G = B and C H = A, B, and C 0 = None

P = BAYSTAT037A - 2 Heat/2 Cool Programmable Thermostat 0 = None

Digit 7 - Mixed Air Temperature Protection Kit (field installed)

1 = Mixed Air Temperature Protection Kit 0 = None

Digit 8 - Carbon Dioxide Sensor (field installed)

1 = Carbon Dioxide Sensor Kit 0 = None

Digit 9 - Future Option

0 = None

Digit 10, 11 - Design Sequence

A0 = A Design

SCXG-SVX01B-EN 7

General

Installation

Information

“After-Shipment” Accessory Model Number

S C W F N 20 4 2 AO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 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

Digit 1 - Parts/Accessories

P = Parts/Accessories

Digit 2 - Unit Model

S= Self-Contained

Digit 3 - Shipment

A = After Unit

Digit 4 - Development Sequence

F = Signature Series G = Modular Series

Digit 5 - Condenser Medium

W = Water Cooled R = Remote Air Cooled

Digit 6 - Refrigerant Circuit Configuration

N = Independent (Water-Cooled) M = Manifolded (Air-Cooled)

Digits 7, 8 - Unit Nominal Capacity

20 = 20 Tons (Water or Air) 22 = 22 Tons (Water Only) 25 = 25 Tons (Water or Air) 29 = 29 Tons (Water or Air) 30 = 30 Tons (Air Only) 32 = 32 Tons (Water Only) 35 = 35 Tons (Water or Air) 38 = 38 Tons (Water Only) 40 = 40 Tons (Air Only) 42 = 42 Tons (Water Only) 46 = 46 Tons (Water Only) 50 = 50 Tons (Air Only) 52 = 52 Tons (Water Only) 58 = 58 Tons (Water Only) 60 = 60 Tons (Air Only) 65 = 65 Tons (Water Only) 72 = 72 Tons (Water Only) 80 = 80 Tons (Water Only)

Digit 9 - Unit Voltage

6 = 200 Volt/60 Hz/3 ph 4 = 460 Volt/60 Hz/3 ph 5 = 575 Volt/60 Hz/3 ph 0 = Not Defined

Digits 10, 11 - Design Sequence

A0 = A Design

Digit 12 - Unit Power Connection

1 = Single Point Power 2 = Dual Point Power 0 = Not Defined

Digit 13, 14 - Motor HP

05 = 5 HP Motor 07 = 7.5 HP Motor

8 SCXG-SVX01B-EN

10 = 10 HP Motor 15 = 15 HP Motor 20 = 20 HP Motor 25 = 25 HP Motor 30 = 30 HP Motor 40 = 40 HP Motor 50 = 50 HP Motor (460V & 575V Only) 0 = Not Defined

Digit 15 - Exhaust/Comparative Enthalpy Module (Field Installed)

1 = ECEM Kit 2 = None

Digit 16 - Generic BAS Module

1 = GBAS 0-5 VDC Kit 0 = None

Digit 17 - Heat Module

1 = Electric Heat Module Kit 2 = Hydronic Heat Module Kit 0 = None

Digit 18 - Remote Human Interface and IPCB

1 = Remote Human Interface Panel Kit (RHI Only) 2 = Interprocessor Communications Module Kit (IPCB Only) 3 = RHI and IPCB Kit 0 = None

Digit 19 - Tracer Communications Interface Kit (TCI)

1 = TCI Comm 3 Kit 0 = None

Digit 20 - Ventilation Override Module Kit (VOM)

1 = VOM Kit 0 = None

Digit 21 - Sensors and Thermostats

A = BAYSENS017 - Zone Temp Only (CV and VAV) B = BAYSENS013 - Zone Temp with Timed Override Button (CV and VAV) C = BAYSENS014 - Zone Temp with Timed Override Button, Setpoint Dial (CV and VAV) E = BAYSENS008 - CV Zone Sensor F = BAYSENS010 - CV Zone Sensor with Indicator Lights G = BAYSENS019 - CV Programmable Night Setback Sensor H = BAYSENS021 - VAV Zone Sensor with Indicator Lights

J = BAYSENS020 - VAV Programmable Night Setback Sensor K = Remote Sensor Kit L = Outside Air Temperature Sensor Kit M = Outside Air Humidity Sensor Kit 0 = None

Digit 22 - Low Entering Air Temperature Protection Device

1 = Low Entering Air Temperature Protection Device Kit 0 = None

Digit 23 - High Duct Temperature Thermostat

1 = High Duct Temp. Thermostat Kit 0 = None

Digit 24 - Plenum High Static Switch

1 = Plenum High Static Switch Kit 0 = None

Digits 25 — 45 - Future Use

0 = None

Pre-Installation

Receiving and Handling

Shipping Package

Commercial self-contained units ship assembled on skids with protective coverings over the coil and discharge openings. Figure I-PC-1 illustrates a typical shipping package.

Ship-Separate Accessories

Field-installed sensors ship separately inside the unit’s main control panel. Extra filters, sheaves, and belts ship in the unit’s fan motor section. Condenser plugs, spring isolators, and isopads ship in the unit’s bottom left side.

Receiving Checklist

Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage.

Inspect individual cartons before

accepting. Check for rattles, bent carton corners, or other visible indications of shipping damage.

Installation

o Do not move damaged material from

the receiving location. It is the receiver’s responsibility to provide reasonable evidence that concealed damage did not occur after delivery.

Do not continue unpacking the

shipment if it appears damaged. Retain all internal packing, cartons, and crate. Take photos of damaged material if possible.

Considerations

o Notify the carrier’s terminal of the

damage immediately by phone and mail. Request an immediate joint inspection of the damage by the carrier and consignee.

Notify your Trane representative of

the damage and arrange for repair. Have the carrier inspect the damage before making any repairs to the unit.

If a unit appears damaged, inspect it

immediately before accepting the shipment. Make specific notations concerning the damage on the freight bill. Do not refuse delivery.

Inspect the unit for concealed

damage before it is stored and as soon as possible after delivery. Report concealed damage to the freight line within the allotted time after delivery. Check with the carrier for their allotted time to submit a claim.

Figure I-PC-1. Typical unit mounted on shipping skid.

SCXG-SVX01B-EN 9

Pre-Installation

Installation

Installation Preparation

Before installing the unit, perform the following procedures to ensure proper unit operation.

1. Verify the floor or foundation is level. Shim or repair as necessary. To ensure proper unit operation, install the unit level (zero tolerance) in both horizontal axis. Failure to level the unit properly can result in condensate management problems, such as standing water inside the unit. Standing water and wet surfaces inside units can result in microbial growth (mold) in the drain pan that may cause unpleasant odors and serious health-related indoor air quality problem.

2. Allow minimum recommended clearances for maintenance and routine service. See “Service Access” section on page 11.

3. Position the unit and skid assembly in its final location. If unit shipped splitapart, follow the procedure in the “Split-Apart Unit Assembly” section on page 14 before completing this step. Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location. See Figure I-PC-7 and I-PC-8 on page 13 for typical rigging procedures, including cautions and proper uses of such equipment as fork lifts, spreader bars, and hooks.

Considerations

5. Remove the protective shipping covers from the unit. Refer to the “Unit Protective Covers” section on page 39.

Note: Unit height and connection locations will change if external vibration isolators are used. The unit may be raised an additional 5 isolators.

Note: Unit height and connection locations will change if the unit is constructed to be split-a-part in the field. See unit submittal drawings for connection locations.

6. Electrical supply power must meet specific balance and voltage requirements, as described in the “Electrical Requirements” section on page 37.

7. Water-cooled units only (model SXWG): The installer must furnish and install a condenser main and standby water pump, cooling tower, pressure gauges and all components for the waterside piping. See the “Water Piping” section on page 34 for general waterside recommendations.

8. Air-cooled units only (model SXRG): These units require field-installation of a remote air-cooled condenser and refrigerant piping. See the “Refrigerant Piping” section on page 36 for general piping recommendations.

/8 inches with spring-type

4. Remove the skids from under the unit. See the “Rigging and Handling” section on page 12. Refer to the “Skid Removal” section on page 16. If you find internal damage, file a claim immediately to the delivering carrier.

10 SCXG-SVX01B-EN

Pre-Installation

Installation

Service Access

See Figure I-PC-4 and Table I-PC-1 for recommended service and code clearances. Access to thermostat unit controls is through a hinged access panel door on the front, lower left of the unit’s compressor section.

IntelliPak panel on the middle right of the fan section. The panel is secured with an automatic latch and quick-acting fasteners, which require a screwdriver to open.

Removable front unit panels provide access to compressors, fan, motor, inlet guide-vane actuator, and belts.

Removable left side panels give access to drive side, fan bearing, inlet guide-vanes, condensers, and waterside economizer control valve. The compressor, con-

unit control access is through a

Considerations

denser and fan motor access panels are secured with quick-acting fasteners. Access panels for evaporator coils, expansion and water valves, and left fan bearing are sheet metal screws. Access to other components for service requires removal of panels secured with sheet metal screws. During operation, sight glasses are viewable through portholes on the upper right side panel of the fan section.





WARNING



Disconnect electrical power source before servicing the unit. Failure to do so may result in injury or death from electrical shock or entanglement in moving parts.

Table I-PC-1. SCWG/SIWG/SCRG/SIRG Clearance Requirements

Side Distance Purpose Front 42 in. (1066 mm) NEC code requirement

Left 18 in. Air-cooled units only

Right 36 in. (914 mm) Provides uniform airflow Inlet 18 in. (457 mm) Provides uniform airflow

See Table

36 in. (914 mm) Refrigeration and waterside component service

77 in. Fan shaft removal

Air Inlet

42” (1066.8 mm)

Minimum

18” (457.2 mm)

Minimum

36” (914 mm)

Minimum

Figure I-PC-4. Top view of self-contained unit showing recommended service and code clearances.

SCXG-SVX01B-EN 11

Pre-Installation

Rigging and Unit Handling

Before lifting the unit or modular component, determine the approximate center of gravity for lifting safety. See Figure I-PC-5 for assembled modular units and Figure I -PC-6 for split-apart units. The center of gravity may vary slightly within the gravity block depending on unit options.

WARNING

Ensure lifting equipment capacity exceeds unit weight by an adequate safety factor to prevent injury, death, or unit damage.

Always test-lift the unit to determine the exact unit balance and stability before hoisting it to the installation location. See Figures I-PC-7 and I-PC-8 for typical rigging procedures and proper rigging equipment usage.

Installation

Figure I-PC-5. Assembled unit gravity block location.

Considerations





WARNING



To prevent injury or death and unit damage, always test-lift the unit to determine actual center of gravity.

PC-6.

See Figures I-PC-5 and I-

Table I-PC-2. Gravity Block Dimensions

Model A B C D SXWG 36 14 3 8 12

SXRG 36 16 4 0 12

Fan Section Only

Compressor Section Only

Figure I-PC-6. Split-apart unit gravity block location.

12 SCXG-SVX01B-EN

Pre-Installation

Rigging and Handling

Unit Shipping

1. Position rigging sling under wood shipping skid.

2. Use spreader bars to avoid unit damage.

3. When using a forklift, exercise caution to prevent unit damage.

4. Use the standard fork length to lift one end and drag or pull unit while skidding the opposite end.

5. The unit center of gravity will fall within center of gravity block at various locations depending on unit options.

6. Use hooks to lift fan section only. Do not hook into open channels to lift unit.

7. See unit nameplate for unit weight.

8. Do not stack units.





CAUTION



Do not use hooks to lift unit or hook into open channels to lift unit. This could cause unit damage.

Installation

Figure I-PC-7. Assembled modular unit proper rigging.

Considerations

Fan Section

Figure I-PC-8. Split-apart modular unit proper rigging.

SCXG-SVX01B-EN 13

Pre-Installation

Installation

Split-Apart Unit Assembly

1. Ensure the tagging information on the fan section nameplate matches that on the compressor nameplate.

2. Remove the connector brackets holding the the sheet metal shipping cover on compressor section. Retain brackets and screws.

3. Remove shipping cover from the compressor section and verify the shipwith packge contains:

• suction and discharge line couplings

• insulation

• sheet metal screws

4. Lift fan section onto the compressor section using the rigging method in Figure I-PC-8 on page 13.

5. Remove skid from the fan section, placing the fan section onto the compressor section. Reference Figure IPC-9 on page 15.

6. Install the connection brackets with the sheet metal screws (referenced in step

2) on all sides of the unit. Reference Detail “A” in Figure I-PC-9.

7. Remove the unit panels labeled RU and RL in Figure I-PC-10 on page 15. To remove panels, first remove the four shipping screws located in the corner of each panel. Next, turn the remaining turn fasteners to the unlatch position. The panel is supported by a “lip” channel. So, lift the panel up and off the unit to remove it. See Detail “A”in Figure I-PC-9 on page 15.

8. Connect the drain hose to the drainpan outlet fitting and secure it with the drain hose clamp provided.

9. Circulate nitrogen thoughout refrigerant circuits.

10. Unbraze and remove the caps on the discharge and suction lines in both the compressor and fan sections.

11. Install and braze discharge and suction line couplings.

12. Insulate discharge and suction lines with the insulation provided.

Considerations

13. Remove panel FLR and open the bottom control panel door, FLL. Pull the fan motor leads (coiled in the fan section) through the knockout in the bottom of the fan section to the control panel. Ensure that the bushing is installed in the hole to prevent the wires from chafing. Refer to the unit wiring diagrams to connect the fan motor leads properly and ensure correct phase sequencing.

IntelliPak Units (UCM) Only

14. Remove panels FML, FMM, and FMR.

15. Pull the circular plug connector (CPC) from the compressor section through the knockouts into the fan section. Install the bushings (provided on the wiring harnesses) in the knockouts.

16. Using the CPC wiring diagram, connect the male CPC to the female CPC in the top control panel.

17. If the unit has the mixed air temperature option, route the capillary tube on back of the filter rack.

Units with Thermostat Only

18. Remove panel FMR. See Note 1 on Figure I-PC-10.

19. Pull frost protection wires from the bottom control panel throughknockouts in bottom of fan section. Route wires to the appropriate frost protection switches on the evaporator coil. Reference the unit wiring diagrams to connect frost protection wiring connectors.

Air-Cooled Units Only:

20. Route the refrigerant circuit wires for circuits 1 and 2 from the bottom control panel through the knockouts to the solenoid valves. The solenoid valves are located in the liquid refrigerant lines on the right-hand side of the unit. Refer to the unit wiring diagrams to make splice connections.

14 SCXG-SVX01B-EN

Pre-Installation

Installation

Considerations

Figure I-PC-9 How to assemble the split apart modular unit.

Figure I-PC-10 Modular unit panel description and internal connections.

SCXG-SVX01B-EN 15

Pre-Installation

Installation

Considerations

Skid Removal

The unit ships on skids to provide forklift locations from the front or rear. The skid allows easy maneuverability of the unit during storage and transportation. Remove the skids before placing the unit in its permanent location.

Remove the skids using a forklift or jack. Lift one end of the unit off of the skids. See Figure I-PC-5 and I-PC-6 on page 12 for unit gravity block location. Slide the skids out and lower the unit at the installation location.

Note: External isolation is not necessary since units are internally isolated. Consult a vibration specialist before “doubleisolating” the unit.

External Unit Isolation

If your job requires external vibration isolation, two options are available: isopads or spring-type isolators. Isopads should be placed under the unit at locations indicated on the factoryprovided isolator sheet.

Set the spring-type isolators (Figure I-PC-

9) in position after the unit is removed from skids before making electrical, piping, or duct connections. All units require a minimum of four isolators per unit. But some may require six isolators, depending upon unit options. Note: The Trane Company strongly recommends you consult a vibration specialist before double-isolating the unit. Double isolation is not recommended.

If you decide to externally isolate the unit, use spring-flex, type CP isolators. The spring number is marked on the outer housing. See Figure I-PC-9.

To install external isolators, complete the following procedure.

1. Locate the isolators under unit base at the locations indicated on the factoryprovided isolator placement sheet. Lift one end of the unit at a time to position isolators to the floor, using anchor bolts.

2. Level the unit by adjusting isolator heights. Unit weight may cause the upper housing to rest on the lower housing of the spring isolators. The isolator clearance shown in the side view of Figure I-PC-9, must be inches. To increase the clearance, lift

16 SCXG-SVX01B-EN

/4 - 1/

the unit off the isolator and turn the leveling bolt counterclockwise. Recheck the unit level and the housing clearances. Maximum allowable difference between isolator heights is inch. Shim as required under the isolators.

Note: The compressors and fan assembly are internally isolated on most units. Due to this, the addition of external isolation devices (spring mounting isolators) is at the discretion of the building or HVAC system designer.

Pre-Installation Checklist

Complete the following checklist before beginning unit installation.

Verify the unit size and tagging with the

unit nameplate.

Make certain the floor or foundation is

level, solid, and sufficient to support the unit and accessory weights. See Table I-DW-1 on page 32. Level or repair the floor before positioning the unit if necessary.

Allow minimum recommended

clearances for routine maintenance and service. Refer to unit submittals for dimensions.

o Allow three fan diameters above the

unit for the discharge ductwork. Return air enters the rear of the unit and

Figure I-PC-9. Optional spring isolator dimensional data.

conditioned supply air discharges through the top.

Electrical connection knockouts are on

the top, left side of the unit.

Allow adequate space for piping

access and panel removal. Condenser water piping, refrigerant piping, and condensate drain connections are on the lower left end panel.

Note: Unit height and connection locations will change if using vibration isolators. The unit height may increase up to 5 spring type isolators.

o Electrical supply power must meet

specific balance and voltage requirements as described in the “Electrical Requirements” section on page 37.

Water-cooled units only: The installer

is responsible for providing a condenser main, standby water pump, cooling tower, pressure gauges, strainers, and all components for waterside piping. See the “Water Piping” section on page 34 for general waterside recommendations.

o Air-cooled units only: The installer is

responsible for providing and installing the remote air-cooled condenser and refrigerant piping, including filter driers.

/8” with

Dimensions

SCWG/SIWG Unit — English - (inches)

ON PAGE 21

Installation

ON PAGE 21

and Weights

ON PAGE 20

ON PAGE 21

SCXG-SVX01B-EN 17

Dimensions

SCWG/SIWG Unit — Metric- (mm)

ON PAGE 21

Installation

ON PAGE 21

and Weights

ON PAGE 21

18 SCXG-SVX01B-EN

Dimensions

SCRG/SIRG Unit — English - (inches)

ON PAGE 21

Installation

ON PAGE 21

and Weights

ON PAGE 21

SCXG-SVX01B-EN 19

SCRG/SIRG Unit — Metric - (mm)

Dimensions and WeightsInstallation

ON PAGE 21

20 SCXG-SVX01B-EN

Dimensions and WeightsInstallation

SCRG/SIRG/SCWG/SIWG Detail “A” Electrical Connections — English - (inches)

SCRG/SIRG/SCWG/SIWG Detail “A” Electrical Connections — Metric - (mm)

Detail “B” Discharge Options — English - (inches) and Metric (mm)

Unit Dimensions - English, (inches)

Unit Tons A B C D E F SCWG/SCRG 20 20 10 3/458 1/25 1/813 1/411 1/ SCWG/SCRG 25 19 1/412 1/457 5/85 1/813 1/411 1/ SCWG 30 - 35/SCRG 32 18 14 5/856 1/25 1/813 1/411 1/

Unit Dimensions - Metric (mm)

Unit Tons A B C D E F SCWG/SCRG 20 508 508 1486 130 337 292 SCWG/SCRG 25 489 489 1464 130 337 292 SCWG 30 - 35/SCRG 32 457 457 1435 130 337 292

SCXG-SVX01B-EN 21

Hot Water Coil

Dimensions and WeightsInstallation

Hot Water Coil Dimensions - English - (inches)

Unit Ton A B C D E F G H J 20 - 35 37 1/453 3/416 5/873 1/214 7/816 1/443 1/45 5/873/

Hot Water Coil Dimensions - Metric (mm)

Unit Ton A B C D E F G H J 20 - 35 946 1365 422 1867 378 413 1099 143 187

22 SCXG-SVX01B-EN

Dimensions

Steam Coil

Installation

and Weights

Steam Coil Dimensions - English - (inches)

Unit Ton A B C D E K L M N P Q R 20 - 35 37 1/453 3/416 5/873 1/210 7/822 1/23 3/815 7/81419 3/84

Steam Coil Dimensions - Metric (mm)

Unit Ton A B C D E K L M N P Q R 20 - 35 946 1365 422 1867 276 572 86 403 25 1041 238 111

SCXG-SVX01B-EN 23

Dimensions

Electric Heat Coil

Installation

and Weights

24 SCXG-SVX01B-EN

Dimensions

Waterside Economizer

Installation

and Weights

SCXG-SVX01B-EN 25

Dimensions

Installation

and Weights

Airside Economizer Dimensions - English - (inches)

Unit Size A B C D E F (1) F (2) G (1) G (2) H (1) H (2) J K L M SCWG/SIWG 20, 25 36 65 5/837 74 1/46 1/856 1/249 3/423 1/420 1/25 5/87 20 1/217 1/817 49 3/ SCRG/SIRG 20 SCWG/SIWG 30, 35 36 65 5/837 74 1/46 1/861 3/862 3/428 1/820 1/23 1/47 20 1/217 1/85 1/262 3/ SCRG/SIRG 25, 32

Airside Economizer Dimensions - Metric (mm)

Unit Size A B C D E F (1) F (2) G (1) G (2) H (1) H (2) J K L M SCWG/SIWG 20, 25 914 1667 940 1886 156 1435 1264 591 521 143 178 521 435 305 1264 SCRG/SIRG 20 SCWG/SIWG 30, 35 914 1667 940 1886 156 1559 1594 714 521 83 178 521 435 140 1594 SCRG/SIRG 25, 32

26 SCXG-SVX01B-EN

Detail “A”

Dimensions and Weights

Detail “B”

(Factory provided for field installation)

SCXG-SVX01B-EN 27

Dimensions

Variable Frequency Drive

Installation

and Weights

Variable Frequency Drive Dimensions - English - (inches)

Motor HP Voltage A B C D E F G H J K Weight

7.5 200V 9

7.5 460V 6 7/ 10 200V 9 10 460V 9 15 200V 9 5/ 15 460V 9 20 200V 9 5/ 20 460V 9 25 200V 14 1 12 1 263/824 3/ 25 460V 9 5/

/212 3/

6 1/

/811 1/

/212 3/

8 1/

/4223/821 1/

/212 3/

8 1/

/4223/821 1/

/216 3/

8 1/

/4223/821 1/

/412 1/ /810 1/ /412 1/ /412 1/

/412 1/

/415 7/

/48 1/

/87 1/

/48 1/

/811 1/

/48 1/

/811 1/

/48 1/

/812 1/

/811 1/

/426 lbs.

/415 lbs.

/426 lbs.

/475 lbs.

/426 lbs.

/475 lbs.

/431 lbs.

/8126 lbs.

/475 lbs.

Variable Frequency Drive Dimensions - Metric (mm)

Motor HP Voltage A B C D E F G H J K Weight

7.5 200V 229 13 203 13 324 6 311 6 210 6 12 kg.

7.5 460V 175 10 156 10 286 10 267 10 184 6 7 kg. 10 200V 229 13 203 13 324 6 311 6 210 6 12 kg. 10 460V 229 13 203 13 324 6 311 6 210 6 12 kg.

15 200V 244 19 206 19 559 10 540 10 286 6 34 kg. 15 460V 229 13 203 13 324 6 311 6 210 6 12 kg. 20 200V 244 19 206 19 559 10 540 10 286 6 34 kg. 20 460V 229 13 203 13 416 6 403 6 210 6 14 kg. 25 200V 356 25 305 25 660 10 629 22 308 10 57 kg. 25 460V 244 19 206 19 559 10 540 10 10 286 34 kg.

28 SCXG-SVX01B-EN

Variable Frequency Drive with Bypass

Dimensions and WeightsInstallation

SCXG-SVX01B-EN 29

Dimensions and WeightsInstallation

Variable Frequency Drive With Bypass Dimensions - English - (inches)

Motor HP Voltage A B C D E F G H J K L M Weight

7.5 200V 19 1/217 1/21 7/841 39 3/

7.5 460V 14 1/212 1/41 7/835 33 3/413 1/212 3 1/432 1 10 200V 19 1/217 1/21 7/841 39 3/ 10 460V 19 1/217 1/21 7/841 39 3/ 15 200V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs. 15 460V 19 1/217 1/21 7/841 39 3/ 20 200V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs. 20 460V 19 1/217 1/21 7/841 39 3/ 25 200V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs. 25 460V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs.

Variable Frequency Drive With Bypass Dimensions - Metric (mm)

Motor HP Voltage A B C D E F G H J K L M Weight

7.5 200V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg.

7.5 460V 362 311 48 889 857 343 305 83 813 38 375 60 40 kg. 10 200V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg. 10 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg. 15 200V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg. 15 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg. 20 200V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg. 20 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg. 25 200V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg. 25 460V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg.

13 1/212 3 1/438 1 1/420 1/22 3/8126 lbs.

/414 3/42 3/887 lbs.

30 SCXG-SVX01B-EN

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