Trane SCWM Installation, Operation And Maintenance Manual
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Trane SCWM Installation, Operation And Maintenance Manual

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Installation, Operation, and Maintenance
Modular Self-Contained
40 to 80 Tons
S S C C W W M M – 40 to 80 Tons
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 2021
S S A A F F E E T T Y Y W W A A R R N N I I N N G G
P P K K G G - - S S V V X X 0 0 2 2 7 7 C C - - E E N N

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  • Page 1 Installation, Operation, and Maintenance Modular Self-Contained 40 to 80 Tons S S C C W W M M – 40 to 80 Tons S S A A F F E E T T Y Y W W A A R R N N I I N N G G Only qualified personnel should install and service the equipment.
  • Page 2 A A L L W W A A Y Y S S r r e e f f e e r r t t o o a a p p p p r r o o p p r r i i a a t t e e S S a a f f e e t t y y D D a a t t a a impact to the environment. Trane advocates the...
  • Page 3 Updated SCWM water-cooled self-contained, 40 to 80 tons table in General Data chapter. This document and the information in it are the property of Trane, and may not be used or reproduced • Updated Final Refrigerant Charge section in Startup in whole or in part without written permission.

  • Page 4: Table Of Contents

    Table of Contents Overview ........7 Water Temperature Requirements .
  • Page 5 T T a a b b l l e e o o f f C C o o n n t t e e n n t t s s External Auto/Stop Input ... . . 48 High Duct Temperature Local Auto Stop.
  • Page 6 T T a a b b l l e e o o f f C C o o n n t t e e n n t t s s Inspecting and Cleaning the Drain Recognizing ScaleBreak®'s saturation point ....... . 72 Pan .

  • Page 7: Overview

    Standard Controls Modular Self-Contained Unit Standard controls supplied with the unit include the Components Trane UC600 unit controls and the TD-7 touch screen display. All basic setup parameters are preset from the Modular self-contained units are complete HVAC factory. systems used in floor-by-floor applications.

  • Page 8: Optional Controls

    O O v v e e r r v v i i e e w w System does not talk BACnet, the Generic Building reset, or external setpoint inputs. Morning warm-up Automation System Module can be ordered with the operation is available on all units. unit to pick up some information.

  • Page 9: Model Number Description

    Model Number Description Modular Self-Contained Digit 1 — Unit Model Digit 15 — Condenser Cleanable Digit 26 — Shipping Method Options S = Self-Contained C = Cassette 0 = None C = Clean in Place Fittings (Chemically Cleanable) Digit 2 — Unit Type Digit 27—...

  • Page 10: General Data

    Number of fans/unit No. of fans Note: All performance data is provided in the Performance Selection Program. Contact Trane Sales at 770-988-8338 for more information. Split coils All performance data is provided in the Performance Selection Program. Contact MJC Sales at 770-988-8338 for more information.
  • Page 11 36.7 19.1 72.3 70 Ton 12.9 48.9 90.8 80 Ton 12.9 48.9 90.8 Table 4. SCWM refrigerant circuits, number of compressors by circuit Circuit Tonnage Model No. SCWMN04L 1-10T VS 1-15T FS SCWMN040 1-15T VS 1-15T FS SCWMN05L 1-10T VS...
  • Page 12 G G e e n n e e r r a a l l D D a a t t a a Table 4. SCWM refrigerant circuits, number of compressors by circuit (continued) Circuit Tonnage Model No. SCWMN06L 1-10T VS...

  • Page 13: Pre-Installation

    N N o o t t e e : : Notify your Trane representative of the I I m m p p o o r r t t a a n n t t : : Do not proceed with installation of a damage and arrange for repair.

  • Page 14: Repair

    P P r r e e - - I I n n s s t t a a l l l l a a t t i i o o n n Repair • Request an immediate, joint inspection of the damage with the carrier and consignee.

  • Page 15: Dimensional Data

    Dimensional Data Figure 3. Unit dimensions (in inches) WIDTH DEPTH Condenser pipe Connections Table 7. Unit dimensions (in inches) Height Depth Model Width 40/40L 50/50L 60/60L 70/70L 80/80L Does not include condensate drain connection. Add an additional 1.5 inch to width to account for drain connection. PKG-SVX027C-EN...
  • Page 16 D D i i m m e e n n s s i i o o n n a a l l D D a a t t a a Figure 4. Fan assembly footprint (in mm/inches) TOP VIEW [1384] 54.49 [700] [876]...
  • Page 17 D D i i m m e e n n s s i i o o n n a a l l D D a a t t a a Figure 5. Variable speed compressor assembly footprint (in mm/inches) TOP VIEW [749] 29.50 [870]...
  • Page 18 D D i i m m e e n n s s i i o o n n a a l l D D a a t t a a Figure 6. Starter cassette assembly footprint (in inches) TOP VIEW 34.50 27.56 SIDE VIEW...
  • Page 19 D D i i m m e e n n s s i i o o n n a a l l D D a a t t a a Figure 7. Evaporator cassette assembly footprint (in inches) Table 8. Evaporator cassette dimensions (in inches) Split Coil Height Depth...

  • Page 20: Service Clearances

    D D i i m m e e n n s s i i o o n n a a l l D D a a t t a a Figure 8. Discharge opening for 40-60 ton WIDTH OPENING 1580 62.205 DEPTH OPENING 28.988...

  • Page 21: Weights

    Weights Table 10. Unit weights Base Weight Waterside Economizer Unit Size (lbs) (kg) (lbs) (kg) 40 Ton 3041 1379 50 Ton 3506 1590 60 Ton 3641 1652 70 Ton 4733 2146 80 Ton 4733 2146 Note: All unit weights include refrigerant, water, and controllers. Table 11.
  • Page 22 W W e e i i g g h h t t s s Table 14. Unit shipping weights (evaporator cassette) (continued) Total Weight of Unit Weight Tonnage Overall dimensions Evaporator Cassette Cassette (lbs) (excl. Economizer) 34.5" x 84" x 77" 1032 70 Ton 70"x 84"...

  • Page 23: Installation - Mechanical

    I I m m p p o o r r t t a a n n t t : : Vibration isolation is not necessary for the unit since the factory internally isolates the compressors, thus creating double isolation. Trane strongly recommends that you consult a vibration specialist when considering double isolation. In general, Trane does not recommend double- isolation.

  • Page 24: Typical Unit Layout

    I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Typical Unit Layout •...
  • Page 25 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l 2.
  • Page 26 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l 6.
  • Page 27 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l 8 8 0 0 T T o o n n R R i i g g h h t t H H a a n n d d U U n n i i t t 4.
  • Page 28 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l 7.
  • Page 29 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l 11.
  • Page 30 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l 15.
  • Page 31 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l N N O O T T I I C C E E Figure 14.

  • Page 32: Condensate Drain Connections

    I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l to be installed at this time.

  • Page 33: Interconnecting Piping

    I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Before installing refrigerant piping, verify holding Before installing piping verify compressor oil levels are charge is present.

  • Page 34: Charging

    I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Preliminary Refrigerant Charging N N O O T T I I C C E E C C o o m m p p r r e e s s s s o o r r D D a a m m a a g g e e ! !
  • Page 35 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Figure 18.

  • Page 36: Fan Installation

    I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Figure 22.
  • Page 37 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Figure 25.

  • Page 38: Duct Connections

    Make duct connections to the unit with a flexible material such as heavy canvas. If a fire hazard exists, Trane recommends using Flexweave 1000, type FW30 or equivalent canvas. Use three inches for return duct and three inches for discharge duct. Keep material loose to absorb fan vibration.

  • Page 39: Electrical Installation

    I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Figure 30.
  • Page 40 I I n n s s t t a a l l l l a a t t i i o o n n - - M M e e c c h h a a n n i i c c a a l l Figure 32.

  • Page 41: Installation - Electrical

    Installation - Electrical Unit Wiring Diagrams Voltage Range Voltages must be within ±10% the nameplate voltage. Specific unit wiring diagrams are provided on the Ensure the unit voltage is balanced by measuring at the inside of the control panel door. Use these diagrams compressor terminals.

  • Page 42: Selection Procedures

    I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l Selection Procedures Determination of Max Fuse (MFS) and Max Circuit Breaker (MCB) Sizes...
  • Page 43 I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l Table 19.
  • Page 44 I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l Table 20.

  • Page 45: Units Only)

    I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l Table 22.

  • Page 46: Zone Sensor Option Used For Discharge Air Reset By Space Temperature

    I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l Zone Sensor Installation Figure 34.

  • Page 47: Wiring

    I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l N N o o t t e e s s : : Table 23.

  • Page 48: Operating Principles

    Operating Principles Control Sequences of Operation water regulating valve option only, which maximizes energy saving by unloading the water pumping Occupied/Unoccupied Switching system. There are three ways to switch occupied/unoccupied: Head Pressure Control 1. Field-supplied contact closure (hardwired binary Water-cooled condensers: Units that are ordered with input to field wiring terminal block (2TB3)) —...

  • Page 49: Occupied Fan Operation

    O O p p e e r r a a t t i i n n g g P P r r i i n n c c i i p p l l e e s s Occupied Fan Operation •...

  • Page 50: High Pressure Cutout Switch

    O O p p e e r r a a t t i i n n g g P P r r i i n n c c i i p p l l e e s s High Pressure Cutout Switch (HPC) •...

  • Page 51: Variable Speed Compressor

    O O p p e e r r a a t t i i n n g g P P r r i i n n c c i i p p l l e e s s 6. From the compressor start contactor coil the same can sense when a refrigerant circuit is approaching a 24 Vac signal is routed through the contactor NO high or low pressure limit condition.

  • Page 52: Compressor Staging

    O O p p e e r r a a t t i i n n g g P P r r i i n n c c i i p p l l e e s s Water Purge Figure 37.

  • Page 53: Optional

    O O p p e e r r a a t t i i n n g g P P r r i i n n c c i i p p l l e e s s Water Flow Switch Option Heat Mode A water flow switch is required to be installed in the The BAS Heat option consists of a fin and tube hot-...

  • Page 54: Controls

    Controls Unit Controller N N o o t t e e : : The number after the dot in the name (example: XM30.#) is the IMC bus address, which is set The MSC uses the UC600 control platform for using the rotary switches on the module. monitoring and control.
  • Page 55 Compressor 3 Safety Circuit Status Open = Circuit Open, Closed = Circuit Complete Discharge Air Temperature Local 10K Ohm Resistor Trane Type 2 Entering Air Temperature Local 10K Ohm Resistor Trane Type 2 Open = Normal, Closed = Emergency Stop...
  • Page 56 — AO4/UI4 — — AO1/UI1 Condenser Water Entering Temperature 10K Ohm Resistor Trane Type 2 Condenser Water Leaving Temperature 10K Ohm Resistor Trane Type 2 AO2/UI2 XM30.7 Condenser Screen Pressure Drop High 0.5 Vdc = 0 PSI, 4.5 Vdc = 500 PSI...

  • Page 57: Navigating The Td-7

    C C o o n n t t r r o o l l s s Table 24. Points list (continued) Point Setup Hardware Connection Point Name Dirty Filter Alarm NO Open = Normal, NO Closed = Alarm; NC Not used Refrigeration Circuit Failure Alarm Open = Normal, Closed = Alarm XM32.13...

  • Page 58: Td-7 Reports

    C C o o n n t t r r o o l l s s TD-7 Reports • Alarms are cleared • Compressors that you want to run are made Unit Status Report available or locked out. The Unit Status report provides an overview of how the Local Auto/Stop Value unit is running and includes all available points that were pre-defined for the unit.

  • Page 59: Unit Setpoints

    C C o o n n t t r r o o l l s s Unit Setpoints Table 25. Unit setpoints that can be modified in the TD-7 Setpoint Name Description Factory Default Condenser Purge Time The amount of time (in minutes) that the compressor will open its condenser (on units with condenser valves only) valve during purge mode when the unit is not operating.

  • Page 60: Unit Setup

    C C o o n n t t r r o o l l s s Unit Setup Table 26. Unit setup setpoints that can be modified in the TD-7 Factory Setpoint Name Description Default Percent of the condenser pressure design the unit Condenser Control % of Design will control to and is user adjustable between 50-100%.

  • Page 61: Water Purge

    C C o o n n t t r r o o l l s s Water Purge During the unoccupied mode, water-cooled units will periodically circulate water through the condensers N N O O T T I I C C E E and waterside economizer if the user has enabled the purge function at the HI.

  • Page 62: Pre-Startup

    Pre-Startup Water-Cooled Unit Piping Before starting up units, perform the following procedure to ensure proper unit operation. Verify condensate drain, water piping drain plugs, economizer header, strainer pressure transducers, and Pre-Startup Checklist condenser vent plug are installed. Complete this checklist after installing unit to verify all Units with Hydronic Heat recommended installation procedures are complete before startup.

  • Page 63: Startup

    Startup W W A A R R N N I I N N G G N N O O T T I I C C E E C C o o m m p p r r e e s s s s o o r r D D a a m m a a g g e e ! ! L L i i v v e e E E l l e e c c t t r r i i c c a a l l C C o o m m p p o o n n e e n n t t s s ! ! O O v v e e r r c c h h a a r r g g i i n n g g s s y y s s t t e e m m c c o o u u l l d d r r e e s s u u l l t t i i n n c c o o m m p p r r e e s s s s o o r r F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w a a l l l l e e l l e e c c t t r r i i c c a a l l s s a a f f e e t t y y p p r r e e c c a a u u t t i i o o n n s s...

  • Page 64: Instructions

    S S t t a a r r t t u u p p Flow should be smooth and even, with no bubbles and sensor sources. once the system has stabilized. Operating and Programming Instructions N N o o t t e e : : Sight glass moisture indicator may show caution or wet at startup.

  • Page 65: Maintenance

    Verify that no air bypasses the filters. See Figure 46, p. for proper filter placement. Table 27. SCWM filter data, water-cooled units Unit Size 40 Ton 50 Ton 60 Ton...

  • Page 66: Inspecting And Cleaning The Drain

    M M a a i i n n t t e e n n a a n n c c e e Figure 46. Unit filter sizes instructions regarding product use. 6. Immediately rinse the drain pan thoroughly with fresh water to prevent potential corrosion from the 24 x 20 24 x 20 24 x 20...

  • Page 67: Brazing Procedures

    M M a a i i n n t t e e n n a a n n c c e e W W A A R R N N I I N N G G measuring 0.1 oz/year leak rate. 5.

  • Page 68: System Evacuation Procedures

    M M a a i i n n t t e e n n a a n n c c e e flux will contaminate the refrigerant system. N N O O T T I I C C E E 6.

  • Page 69: Compressors

    M M a a i i n n t t e e n n a a n n c c e e Figure 47. Typical vacuum pump hookup Figure 48. Evacuation time vs. pressure rise 1600 Continously increasing pressure indicates the presence of leaks, 1400 moisture, or both.

  • Page 70: Components

    M M a a i i n n t t e e n n a a n n c c e e Components • Clean refrigerant coils with cold water and detergent, or with one of the commercially Cleaning Coil Fin available chemical coil cleaners.
  • Page 71 M M a a i i n n t t e e n n a a n n c c e e Draining the Waterside Economizer Coil system back into service. 8. Straighten any coil fins that may be damaged with a N N O O T T I I C C E E fin rake.

  • Page 72: Sequence Of Operations

    M M a a i i n n t t e e n n a a n n c c e e Sequence of Operations Circulation Pump Setup Circulation pump can be setup completely external to Recognizing ScaleBreak® ® 's saturation the Modular Self Contained unit eliminating the need point to remove panels for access.

  • Page 73: Cleaning Instruction

    M M a a i i n n t t e e n n a a n n c c e e Cleaning Instruction Figure 50. Typical setup for clean in place I I m m p p o o r r t t a a n n t t : : When descaling the water side of a SWEP brazed plate heat exchanger please visit https://www.goodway.com/resources/ calculators#/heat-exchanger...

  • Page 74: Coil

    M M a a i i n n t t e e n n a a n n c c e e has completed the job, you can begin your flushing along with the quantity of cleaning material, duration process. of cleaning time, and safety precautions necessary for handling the cleaning agent.

  • Page 75: Maintenance Periodic Checklists

    M M a a i i n n t t e e n n a a n n c c e e Maintenance Periodic Checklists Semi-Annual Maintenance W W A A R R N N I I N N G G W W A A R R N N I I N N G G R R o o t t a a t t i i n n g g C C o o m m p p o o n n e e n n t t s s ! ! H H a a z z a a r r d d o o u u s s S S e e r r v v i i c c e e P P r r o o c c e e d d u u r r e e s s ! !

  • Page 76: Diagnostics

    Diagnostics Troubleshooting record suction and discharge pressures. System malfunctions such as low airflow, line restrictions, System Checks incorrect refrigerant charge, malfunctioning of expansion valves, damaged compressors, etc. will W W A A R R N N I I N N G G result in pressure variations which are outside the normal range.
  • Page 77 D D i i a a g g n n o o s s t t i i c c s s Table 28. Potential unit issues and solutions (continued) Problem Possible Cause Remedy Excess dirt in unit Missing filters Filter bypass Replace filters Reduce filter bypass Microbial growth (mold) Standing water in drain pan...
  • Page 78 D D i i a a g g n n o o s s t t i i c c s s Table 29. Compressor alarming (continued) Diagnostic: Compressor (1-4) Suction Pressure Sensor Failure (In Alarm) Typical Causes Reset Required Notification Class Action Reason...
  • Page 79 D D i i a a g g n n o o s s t t i i c c s s Table 29. Compressor alarming (continued) HVAC Critical Alarm. Compressor will be locked The Temperature sensor is Manual Reset required •...
  • Page 80 D D i i a a g g n n o o s s t t i i c c s s Table 29. Compressor alarming (continued) HVAC Critical Alarm. Compressor will be locked The temperature sensor is Manual Reset required •...
  • Page 81 D D i i a a g g n n o o s s t t i i c c s s Table 29. Compressor alarming (continued) Typical Causes Reset Required Notification Class Action Reason HVAC Critical Alarm. Compressor will be locked The Calculated superheat Manual Reset required •...
  • Page 82 D D i i a a g g n n o o s s t t i i c c s s Table 29. Compressor alarming (continued) HVAC Critical Alarm. Compressor will be locked The Compressor Manual Reset required • VFD has an issue.
  • Page 83 D D i i a a g g n n o o s s t t i i c c s s Table 30. Compressor warning (continued) HVAC Warning. No action is taken on the Head Pressure has No Reset required, •...
  • Page 84 D D i i a a g g n n o o s s t t i i c c s s Table 32. General unit alarming External Auto/Stop (In Alarm) Typical Causes Reset Required Notification Class Action Reason HVAC Critical Alarm. Unit will shut down and be The external auto/stop Emergency stop binary...
  • Page 85 D D i i a a g g n n o o s s t t i i c c s s Table 32. General unit alarming (continued) HVAC Critical Alarm. Unit will shut down and be The temperature sensor is Manual Reset Required •...
  • Page 86 D D i i a a g g n n o o s s t t i i c c s s Table 32. General unit alarming (continued) HVAC Critical Alarm. Unit will shut down and be The Pressure sensor is None, alarm clears once •...
  • Page 87 D D i i a a g g n n o o s s t t i i c c s s Table 32. General unit alarming (continued) HVAC Critical Alarm. The Compressors will be The Condenser Water Manual Reset Required •...
  • Page 88 D D i i a a g g n n o o s s t t i i c c s s Table 33. General unit warning (continued) HVAC Service Required. Only affects the Water The Pressure sensor is None, alarm clears once •...
  • Page 89 D D i i a a g g n n o o s s t t i i c c s s Table 33. General unit warning (continued) Typical Causes Reset Required Notification Class Action Reason HVAC Service Required. Affects the alarm for Dirty The Pressure sensor is None, alarm clears once •...
  • Page 90 D D i i a a g g n n o o s s t t i i c c s s Table 33. General unit warning (continued) Typical Causes Reset Required Notification Class Action Reason HVAC Service Required. Output may not function The UC600 Controller has None, alarm clears once •...
  • Page 91 D D i i a a g g n n o o s s t t i i c c s s Table 33. General unit warning (continued) Typical Causes Reset Required Notification Class Action Reason HVAC Service Required. Output may not function The UC600 Controller has None, alarm clears once •...
  • Page 92 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

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