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Commercial Self-Contained Modular Series
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Trane Commercial Self-Contained Modular Series Catalogue

Product Catalog
Commercial Self-Contained Modular Series
20-35Ton Water-Cooled Air Conditioners 20-32Ton Air-Cooled Air Conditioners Remote Air Cooled Condensers
June 2014
PKG-PRC003U-EN

Introduction

Figure 1. Affordable self-contained value from Trane
Copyright
• Modular design allows the fan/coil section to “split-apart”
from the compressor section
• 35” wide base that fits through standard door openings
• Trane 3-D® Scroll compressors give reliable, efficient,
and quiet operation
• Unit mounted microprocessor control with human
interface panel
• Hinged and removable control panel door for easy access
• Waterside or airside economizer for “free cooling”
• Two-bolt connection on cleanable condenser for quick,
easy maintenance
• Waterside valve package option to enhance system
efficiency
• Sight glasses with ports for viewing unit while running
• 2-inch flat filter box inside unit casing
• Energy saving with variable frequency drive (VFD)
• Sloped drain pan for indoor air quality
This document and the information in it are the property ofTrane, and may not be used or
reproduced in whole or in part without written permission.Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.
Trademarks
Trane and theTrane logo are trademarks of Trane in the United States and other countries. All
trademarks referenced in this document are the trademarks of their respective owners.
Revision History
PKG-PRC003U-EN (09 Jun 2014)
Updated to correct460V, 7.5HP, ODPFan motor FLAvalue, and input line current for 575V, 15HP, with bypass.
PKG-PRC003-EN (04 Apr 2013)
Add wireless comm interface (WCI).
PKG-PRC003-EN (15 Oct 2012)
Corrected fan motor information. Updated fan FLA and LRA values in Electrical Data tables

Table of Contents

Introduction ......................................................2
Features and Benefits ..............................................5
Why consider Modular Series self-contained floor-by-floor systems? .... 6
Integrated Self-Contained Systems ................................. 9
Trane R-410A 3-D™ Scroll Compressor ............................ 11
Application Considerations .........................................12
Free Cooling Opportunities and Alternatives ........................ 14
Isolation Recommendations ...................................... 14
Condenser Water Piping ......................................... 15
Selection Procedure ...............................................17
Modular Series Self-Contained ................................... 19
Model Number Descriptions ........................................19
Self-Contained Ship-With Accessory Model Number ................. 21
Remote Air-Cooled Condenser ................................... 21
General Data .....................................................22
Performance Data ................................................25
Airside Pressure Drop ........................................... 25
Waterside Pressure Drop ........................................ 28
Water-Cooled Unit Performance .................................. 30
Air-Cooled Unit Performance ..................................... 38
Heating Performance ........................................... 41
Controls ........................................................42
Heat Module Option ............................................ 42
Generic BAS Option (GBAS) ..................................... 42
LonTalk™ Building Automation System ............................ 43
BACnet™ Building Automation System ............................ 43
Standard Control Features on IntelliPak™ Units ..................... 44
Airside Options ................................................ 49
IntelliPak™ Units - Zone Temp Control (Sequence Of Operation) ....... 49
IntelliPak™ Units - Supply Air Temp Control (Sequence Of Operation) . . 51
Zone Sensor Options ........................................... 53
Electrical Data ....................................................56
Selection Procedures ........................................... 56
Determination of Minimum Circuit Ampacity (MCA) .................. 56
PKG-PRC003U-EN 3
Table of Contents
Dimensions and Weights ..........................................59
Variable Frequency Drive Without ByPass .......................... 69
Variable Frequency Drive With ByPass ............................. 74
Service Clearances ............................................. 78
Mechanical Specifications ..........................................79
Modular Series Self-Contained ................................... 79
IntelliPak™ Control Options ...................................... 81
Remote Air-Cooled Condenser CCRC/CIRC .......................... 86

Features and Benefits

The industry leader in self-contained systems since 1988 is now even better!Trane’s modular series
unit is easy to install, flexible, and now has the latest control technology. New modular DDC controls with human interface (HI) panel make self-contained units easier to operate.
The modular series design fits the needs of the retrofit/renovation market.The unit easily “splits”
apart to fit into freight elevators. In addition, we can ship the compressor section separate from the fan/coil section for field installation. Filter, economizer, and heating coil sections are all removable for added flexibility.Also, the modular series is smallenough tofit through a standard 35-inch door opening.
The IntelliPak™ unit’s DDC controls areTrane-designed to work withTrane equipment for optimum
efficiency. The factory installs and commissions each control component to ensure simple and reliable operation. Also, the IntelliPak® self-contained unit has a unit mounted human interface panel as standard and a remote option that will monitor up to four units.
Easy to install
• Passes through standard 35-inch door opening
• Removable fan/coil section from compressor section for those applications that requirethe unit to be “split apart”
• Ship separate fan/coil section for field installation
• Removable filter, economizer and heating coil sections for added flexibility
Flexible
• Left or right hand condenser connections for field piping\Condenser piping factory manifolded and extended to the unit exterior for a single inlet and outlet
• Economizer factory piped for either right or left hand connections and extended to the unit exterior for a single inlet and outlet
• Free cooling with either waterside or airside economizer options
• Hot water, steam, and electric heating coil options
• Control system choices include:
• Thermostat interface for simple constant volume applications
• Direct digital controls (DDC) available on the IntelliPak self-contained, offers the most
advanced unit control for constant volume or variable air volume applications — available with aTracer™ LCI-I, BCI-I, or generic building automation system interface.
Easy to operate
The Intellipak self-contained unit’s control design allows greater application flexibility.You can
order exactly what the job requires as options, instead of one large control package. Unit features are distributed among multiple field replaceable printed circuit boards.
All set-up parameters are preset from the factory, requiring less startup time during installation.
In addition, IntelliPak self-contained unitshave a humaninterface panel thatdisplays unit operating parameters and conditions in English, Spanish, or French language, making it easy to adjust setpoints or service. It also requires less time for building maintenance personnel to learn to interact with the unit. Human interface panel displays all of the self-contained unit’s control parameters, such as system on/off; demand limiting type; night setback setpoints. All setpoint adjustments are done through human interface key-pad.You can also monitor diagnostic points, suchas sensor failures; supply airflow loss; and inoperative refrigerant circuit.Diagnostics are held in memory, even during power loss.This allows operator/servicer to diagnose failure root cause.
PKG-PRC003U-EN 5
Features and Benefits

Why consider Modular Series self-contained floor-by-floor systems?

Improved Cash Management
• Factory-installed and tested options reduce field labor and installation risk, while improving system reliability
• Requires less sophisticated maintenance than built-up systems
Tenant Satisfaction
• Complete HVAC system on each floor minimizes tenant inconvenience during routine maintenance
• Tenants can control system after hours to increase productivity and minimize expense
Low First Cost
• Reduce field labor, installation time, and cost with factory packaged controls and piping
• Reduce installed tonnage up to 20% by taking advantage of building diversity and VAV flexibility
• Flexible air discharge arrangement matches most building configurations
Lower Installed Cost
• Single-point power connection
• Single-point water connection
• Factory commissioned and tested controls
• Factory installed options
• Internally trapped drain connection
Economical Operation
• Free cooling year-round with waterside or airside economizer
• Energy savings with floor-by-floor system since only units on floors requiring cooling need to operate
• Significant annual energy consumption reduction compared to a central chilled water system due to partial occupancy after-hours
• Simple heating alternatives include perimeter radiation and fan-powered VAV
• Energy savings from the integrated water valve control using pump unloading
Assured Acoustical Performance
• Flexible, horizontal discharge plenum provides smooth airflow, reducing static pressure losses for optimum acoustical performance
• Multiple compressor design reduces acoustical levels. Scroll compressor design smooths gas flow for quieter operation
Indoor Air Quality (IAQ) Features
• Sloped drain pan
• Stainless steel sloped drain pan option
• Internally trapped drain connection
• Double wall construction option
• Matt-faced fiberglass insulation
• High efficiency throwaway filter option
Features and Benefits
• Easily cleanable evaporator, condensers, and waterside economizers
• Filter access door allows easy removal to encourage frequent filter changing
• Airside economizer option with Traq™ damper allows direct measurement and control of outdoor air
Enhanced Serviceability
• Self-supporting removable panels
• Quick access service panel fasteners
• Refrigerant line sight glasses in view during operation
• Easy to adjust setpoints and operating parameters using the human interface panel on IntelliPak units.
Standard Features
• 20 through 35 ton industrial and commercial water-cooled self-contained units
• 20 through 32 ton industrial/commercial remote air-cooled self-contained units
• IntelliPak™ DDC controls or thermostat interface
• ImprovedTrane 3-D™ scroll compressor
• Constant volume (CV) or variable air volume (VAV) operation
• Low ambient compressor lockout adjustable control input
• EISA efficiency supply fan open drip proof (ODP) or totally enclosed fan cooled (TEFC) motor options
• Emergency stop input
• Refrigeration circuits are completely factory piped and tested on water-cooled units
• Water-cooled condensers are factory piped and tested, mechanically cleanable
• Two-bolt removable condenser waterboxes for quick and easy cleaning
• Sloped drain pans to ensure complete condensate removal for IAQ
• Internally trapped drain connection with cleanout
• Internally isolated centrifugal supply fan
• Sturdy galvanized steel framework with easily removable painted exterior galvanized steel panels
• UL listing on standard options
• Fan belts and grease lines are easily accessible
• Access panels and clearance provided to clean evaporator and waterside economizer coil fins
• Condensing pressure control on all variable water flow systems with valves
• Complete factory run–in test with power and water
Standard Control Features
• Unit mounted human interface panel with a two line x 40 character language (English, Spanish, or French) display and a 16-function keypad that includes custom, diagnostics, and service test mode menu keys
• Compressor lead/lag
• FROSTAT™ coil frost protection on all units
• Daytime warmup (occupied mode) and morning warmup operation
• Supply air static over pressurization protection on units with variable frequency drives (VFDs)
• Supply airflow proving
PKG-PRC003U-EN 7
Features and Benefits
• Supply air tempering control with heating option
• Supply air heating control on VAV with hydronic heating option
• Mappable sensors and setpoint sources
• Occupied/unoccupied switching
• Timed override activation
• Programmable water purge during unoccupied mode
• High entering air temperature limit
• Low entering air temperature limit with waterside economizer or hydronic heat
Optional Features
• Trane LCI-I communication interface module: ICS interface control module
• BACnet Communications Interface Module
• Generic BAS interface
• Comparative enthalpy control
• Ventilation override with up to five external inputs
• Remote human interface controls up to four units
• Waterside modulating condensing temperature control valves include factory installed piping
• Removable cast iron headers on cleanable waterside economizer
• Refrigerant suction discharge line service (shut-off) valves
• Protective coating on unit and/or evaporator coils
• Double wall construction
• Stainless steel sloped drain pan
• Medium efficiency throwaway filters
• Through-the-door non-fused disconnect switch
• High duct temperature thermostat
• Dual electrical power connection
• CO2 reset input
• Trane’s air qualityTraq™ damper in mixing box
and control wiring
Factory Installed or Ship Separate Options
• Waterside economizer with factory installed piping and controls
• Flexible horizontal discharge plenum with or without factory cut holes, double wall perf
• Heating options include hot water, steam, and electric (field installed only)
Field Installed Accessories
• Airside economizer control with or without mixing box
• Wireless comm interface (WCI)
• Programmable sensors with or without night set back - CV and VAV
• ICS zone sensors used withTracer™ system for zone control
• Field installed module kits available to upgrade controls
• Ultra low leak dampers for 0-100% & modulating fresh air economizer
• Fully integrated variable frequency drive (VFD) control with or without optional integrated bypass

Integrated Self-Contained Systems

Integrated Comfort™ System (ICS)
Figure 2. You can control, monitor, and service your facility using Trane’s ICS and your PC
Features and Benefits
Trane’s Integrated Comfort™ system (ICS)
increases job control by combining IntelliPak™ Modular Series self-contained units and aTracer building management system.This integrated system provides total building comfort and control. Building owners and managers not only save energy when using ICS — they have the ability to automate their facilities and the convenience of a control system interface.
Simplifying The Comfort System
Trane’s designers combined new technology and
innovation to bring you more system capabilities and flexibility. Our Integrated Comfort™ system (ICS) with HVAC equipment is easy to use, install, commission, and service.
Everything you need to know about your self-contained VAV system is available usingTracer building automation products.Tracer is a software package that minimizes custom programming requirements and allows easy system setup and control using your personal computer. Operating data from all system components is readily available for evaluation.You can control, monitor, and service your facility — all from your personal computer.
The IntelliPak self-contained unit, as part ofTrane ICS, provides powerful maintenance monitoring,
control, and reporting capabilities.Tracer places the self-contained unit in the appropriate operating mode for: system on/off, night setback, demand limiting, setpoint adjustment based on outside parameters and much more.You can monitor unit diagnostic conditions throughTracer such as: sensor failures, loss of supply airflow, and an inoperative refrigerant circuit.
IntelliPak Modular Series Self-Contained Monitoring Points Available Using
Tracer
• Compressor on/off status
• Ventilation status
• Condenser water flow status
• Heat status
• Supply air pressure
• Supply air temperature
• Suction temperature of each circuit
• Entering economizer water temperature
• Zone temperature
• Entering condenser water temperature
• Supply air temperature reset signal
• Morning warmup sensor temperature
• Entering air temperature
PKG-PRC003U-EN 9
Features and Benefits
Tracer Control Points for IntelliPak Modular Series Self-Contained Units
• Cooling and heating setpoints
• VAV discharge air temperature setpoints
• Supply air pressure setpoint
• Cooling and heating enable/disable
• Air economizer enable/disable
• Air-side economizer minimum position
• Unit priority shutdown
Interoperability with BACnet
TheTraneTracer SC BACnet Control Interface (BCI) for IntelliPak self-contained offers a building
automation control systemwith outstanding interoperabilitybenefits. BACnet, whichis an industry standard, is an open, secure and reliable network communication protocol for controls, created by
American Society of Heating, refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE)
Interoperability allows application or project engineers to specify the best products of a given type, rather than one individual supplier's entire system. It reduces product training and installation costs by standardizing communications across products. Interoperable systems allow building managers to monitor and control IntelliPak equipment withTracer SC controls or a 3rd party building automation system. It enables integration with many different building controls such as access/intrusion monitoring, lighting, fire and smoke devices, energy management, and a wide variety of sensors (temperature, pressure, humidity, occupancy, CO2 and air velocity).
Commissioning, control, efficiency, and information…it simply all adds up to one reliable source…Trane.
Trane Wireless Comm Interface (WCI)
TheTrane®Wireless Comm Interface (WCI) is the perfect alternative toTrane’s BACnet™ wired
communication links (for example, Comm links between aTracer™ SC and aTracer™ UC400). Minimizing communication wire used between terminal products, zone sensors, and system controllers has substantial benefits. Installation time and associated risks are reduced. Projects are completed with fewer disruptions. Future re-configurations, expansions, and upgrades are easier and more cost effective.

Trane R-410A 3-D™ Scroll Compressor

The R-410ATrane 3-D™ Scroll provides
important reliability and efficiency benefits inherent in its design.The 3-D™ Scroll allows the orbiting scrolls to touch in all three dimensions, forming a completely enclosed compression chamberwhich leads toincreased efficiency. In addition, the orbiting scrolls only touch with enough force to create a seal, eliminating wear between the scroll involutes.
The fixed and orbiting scrolls are made of high
strength cast iron which results in less thermal distortion and minimal leakage. In addition, improved part isolation provides reduced compressor sound levelscompared to previous designs.
Features listed below optimize the compressor design and performance:
• Optimized scroll profile
• Heat shield protection to reduce heat transfer between discharge and suction gas
• Improved sealing between high side and low side
Additional features are incorporated in the compressor design for greater reliability:
• Patented design motor cap for improved motor cooling
• Improved bearing alignment
• Improved resistance to dry start-up
• Oil sight glass for evaluating proper oil levels
Features and Benefits
LowTorque Variation
The 3-D™ Scroll has a very smooth compression cycle, imposing very little stresson the motor and
resulting in greater reliability. Low torque variation reduces noise and vibration.
Suction Gas Cooled Motor
Compessor motor efficiency and reliability is further optimized with the latest scroll design.The patented motor cap directs suction gas over the motor, resulting in cooler motor temperatures for longer life and better efficiency.
Proven Design through Testing and Research
The new R-410A 3-D™ Scroll compressor is the next generation of reliable Trane 3-D™ Scroll
compressors provided byTrane, the leader in scroll compressor technology
.
Figure 3. One of two matched scroll plates - the distiguishing feature of the scroll compressor
PKG-PRC003U-EN 11

Application Considerations

Self-Contained Acoustical Recommendations
Successful acoustical results are dependent on manysystem design factors. Following are general acoustical recommendations. For more information, or if there is concern about a particular installation, contact a professional acoustical consultant.
Location and Orientation of the Mechanical Equipment Room
Locate the equipment room adjacent to stairwells, utility rooms, electrical closets, and rest rooms if possible. See Figure 4, p. 12.This minimizes the acoustic effects and risk of workmanship or installation errors. Place the discharge and return air ductwork over these less acoustically sensitive areas, using vertical orhorizontal fresh air shafts. Consult code requirements for fresh air and smoke purge constraints.
Figure 4. Equipment room location and orientation
Return Air Ductwork
Duct the return air into the mechanical equipment room. Connect ductwork to the unit if local code dictates.The return air ductwork must have an elbow inside the equipment room. Extend the ductwork from the elbow far enough to block the “line of sight” to the exterior of the equipment room. Use aminimum ductwork lengthof 15 feetto the equipmentroom exterior. Line theduct with two-inch, three-pound density insulation. Use multiple, small return ducts for better acoustical performance to the occupied space.
Supply Air Ductwork
Insulate the supplyair duct with two-inch, three-pound densityinsulation. Extend thislining at least 15 feet out from the equipment room wall, keeping the duct aspect ratio as small as possible. Minimize large flat panels since they transmit sound. In addition, small aspect ratios will minimize potential “oil canning” of the duct due to flow turbulence.
Application Considerations
The flexible horizontal discharge plenum option helps avoid complicated ductwork transitions.
Ductwork turning vanes typically improve pressure drop but degrade acoustical performance.
Recommended Maximum Air Velocities
The maximum recommended velocity for the discharge air duct is 2,000 fpm. The maximum
recommended velocity for the return air duct is 1,000 fpm. Limit air velocities below these operating points to minimize the risk of flow turbulence that causes regenerated noise. Using round supply duct and static regain allows maximum discharge air velocities up to 3,000 fpm. Lining round supply duct also substantially lowers frequency noise attenuation. However, flow regenerated noise potential increases dramatically at air velocities over 3000 fpm.
Equipment Room Construction Options
The preferred equipment room wall construction is concrete block. If this is not feasible then a
double stud offset wall is suggested. See Figure 5, p. 13.This removes physical contact that would transmit sound through the equipment room wall to the occupied space. Interweave fiberglass insulation between the wall studs. Use two layers of sheetrock on each side of the wall.
Workmanship details are critical to acoustical performance. Seal all wall and floor penetrations by
the ductwork, water piping, and equipment room access doors with a flexible material such as caulk and/or gasketing to stop noise and air leaks.
Locate the equipment room door away from acoustically sensitive areas like conference rooms.
The door should swing out of the equipment room, if possible, so that the low pressure in the
equipment room pulls the door in to help maintain a tight seal.
Figure 5. Double stud offset wall with interwoven insulation
PKG-PRC003U-EN 13
Application Considerations
Equipment Options
The flexible horizontal discharge plenum allows multiple tested outlet options.This minimizes the
risk of acoustic and/or pressure drop problems by avoiding complex transitions close to the fan discharge.
Static PressureVersus Acoustics
Design the system to minimize the total static pressure required from the self-contained unit fan.
Typically a change in static pressure of only 0.5 inches can reduce NC level by approximately 2 or
3 in the occupied space.

Free Cooling Opportunities and Alternatives

Free cooling is available with either airside or waterside economizers.The advantages and disadvantages of each type are listed as follows:
Waterside Economizer
The waterside economizer substantially reduces the compressor energy requirements because it
uses the cooling water before it enters the condensers. Additional equipment room space is not required since the coils are contained within the overall unit dimensions.
Disadvantages include higher airside pressure drop and a higher head on condenser water pumps.
The coils may be mechanically cleanable (optional) for ease in maintenance versus expensive and
difficult chemical cleaning methods.
Airside Economizer
The airside economizer substantially reduces compressor, cooling tower, and condenser water
pump energy requirements using outside air for free cooling. It also reduces tower make up water needs and related water treatment.
Disadvantages include building requirements that locate the mechanical room and self-contained unit toward an exterior wall to minimize ductwork, building barometric control, or additional air shafts. Also, airside economizers require additional mechanical room space.

Isolation Recommendations

Unit
The Modular Series unit is internally isolated so that external isolation is not required. Consult a
vibration specialist before using external isolation.TheTrane Company does not recommend double isolation. If isolation external to the unit is preferred, remove internal isolators.
Ductwork
Design duct connections to the unit using a flexible material. Consult local codes for approved flexible duct material to prevent fire hazard potential.
Piping Connections
Rubber isolator connectors are recommended for condenser piping to prevent vibration transmission to or from thebuilding plumbing.The Modular Seriesself-contained unit is internally isolated and does not require additional isolation. However, do not forget to design proper system vibration isolation to prevent vibration transmission from the building plumbing to the unit. Also be sure that the drain line is properly isolated.

Condenser Water Piping

Piping Location and Arrangement
Provide at least 24 inches of clearance between the piping and the unit for service. Place the risers away from the side of the unit if possible. Be sure to allow sufficient space for valves and unions between the piping andthe self-contained unit. Layout condenser piping in reverse returns to help balance the system.This is accomplished by equalizing the supply and return pipe length. Multi­story buildings may use a direct return system with balancing valves at each floor. Install all heat exchangers and most cooling tower piping below the sump operating water level to prevent overflow during unit and/or system shut down.
Recommended Pump Location
Pump location is preferred downstream of the cooling tower and upstream of the self-contained unit.This provides smoother and more stable unit operation.
When the tower and pump are both roof mounted, be sure to provide the necessary net positive
suction head pressure to prevent cavitation. Raise the tower or submerge the pump in a sump to provide positive suction.To prevent an on-line pump failure, use a standby pump to avoid a complete system shutdown. Use several partial capacity pumps or variable speed pumps. Review the economics of these alternate pumping options.
Strainers and WaterTreatment
Water strainers are required at the unit inlet to eliminate potential unit damage from dirty water.
Specify a water basket strainer to avoid an incorrect application of a stream strainer. Untreated or poorly treated water may result in equipment damage. Consult a water treatment specialist for treatment recommendations.
Application Considerations
Isolation Valves
Install isolation valves at each unit before the strainer and after the condenser.This allows periodic servicing of the unit or strainer while allowing other units in the system to remain in operation.
Pressure Gauges
Install pressure gauges on the inlet and outlet of the self-contained unit. Select the gauge’s scale so that the unit design operating point is approximately mid-scale.
Thermometers
Install thermometers on the condenser water inlet and outlet linesto each unit for system analysis.
Trane recommends using athermometer temperature range of 40to 140°F, using a2°F temperature
increment.
Drains
The unit condensate drain is internally trapped to offset the pressure differential that exists during
fan operation. Install a trapped drain in the low point of the mechanical equipment room floor to collect water from cleaning operations.
Condensing Pressure Control (Water-Cooled condensers)
Often cold condensing water applications between 54°F and 35°F require a condensing pressure control valve. Any unit with variable-flow waterside valves can modulate water flow to maintain a user defined condensing temperature. However, to utilize this feature, the building water system must be capable of operating at reduced water flow rates through the self-contained units. It is imperative to install variable volume pumps or an external bypass in the water distributionsystem.
PKG-PRC003U-EN 15
Application Considerations
Waterside Economizer Flow Control
Units equipped with waterside economizer control valves can be set up for variable or constant water flow. Use constant water flow setup on water systems that are not capable of unloading water supply to the unit.The economizer and condenser valves will operate in complement to one another to provide continuous water flow.
Use variable water flow setup with water flow systems that can take advantage of pump unloading for energy savings. Since non-cooling operation restricts water flow during part load economizing or condensing temperature control, it is imperative to install variable volume pumpsor an external bypass in the water distribution system.
Airflow Limitations
The minimum recommended airflow for proper VAV system staging and temperature control is
35% of nominal design airflow. However, using VAV boxes at the appropriate minimum settings will prevent the self-contained unit fromoperating in a surge condition at airflows below thispoint. Continuous operation in a surge condition can cause fan failure. See Table 1, p. 22 for minimum airflow conditions.
Modular Series self-contained units use fixed pitch sheaves. Adjust air balancing by obtaining alternate fixed pitch sheave selections from the localTrane sales office.
Waterflow Limitations
Use 3 gpm/ton for optimum unit capacity and efficiency. Use 2.5 or 2 gpm/ton to reduce pump energy, cooling tower and piping costs. However, these reduced waterflows may impact unit capacity and efficiency by one or two percent. Consult the general data section for unit specific waterflow ranges.
Air Cooled Condenser Location
Unobstructed condenser airflow is essential to maintaining capacity and operating efficiency.
When determining unitplacement, give carefulconsideration to assure sufficient airflow across the
condenser coils. Avoid these two detrimental conditions:warm air recirculation and coil starvation.
Both warm air recirculation and coil starvation cause reductions in unit efficiency and capacity because of the higher head pressure associated with them. In more severe cases, nuisance unit shutdowns will result from excessive head pressures.
Clearances
Ensure vertical condenser air discharge is unobstructed. While it is difficult to predict the degree of warm air recirculation, a unit installed with a ceiling or other obstruction above itwill experience a capacity reduction that will reduce the maximum ambient operation. Nuisance high head pressure tripouts may also occur.
The coil inlet must also be unobstructed. A unit installed closer than the minimum recommended
distance to a wall or other vertical riser will experience a combination of coil starvation and warm air recirculation.This may result in capacityand efficiency reductions, as well as possible excessive head pressures. Reference the service clearance section for recommended lateral distances.
Ambient Limitations
Standard ambient control allows operation down to 45°F with cycling of condenser fans. Units with the low ambient option are capable of starting and operating in ambient temperatures down to 0°F. Optional low ambient units use a condenser fan damper arrangement that controls condenser capacity by modulating damper airflow in response to saturated condenser temperature.
Maximum cataloged ambient temperature operation of a standard condenser is 115°F. Operation at design ambient above 115°F can result in excessive head pressures.

Selection Procedure

Following is a sample selection for a standard applied water-cooled self-contained at particular operating conditions. UseTrane Official Product Selection System,TOPSS™, for making all final selections or contact your localTrane sales office.

Unit Capacities

1. Determine entering air temperature dry bulb and wet bulb and entering water temperature.
2. Refer to performance Table 7, p . 30 through Table 19, p. 41 to find gross total and sensible capacity that best meets capacity requirements.
3. Apply the cfm correction factors from the capacity correction factor Table 6, p. 29 to determine gross total and gross sensible capacities at desired cfm.
4. Multiply condenser water deltaT by the total capacity cfm correction factor to determine new condenser water deltaT.
5. Using design cfm, determine static air pressure drops for accessories from the air pressure drop
Figure 6, p. 25 through Figure 11 , p . 27. Add accessory static pressure drops to external
supply and return static air pressure drops. Use the total air pressure drop to determine rpm and brake horsepower requirements from the appropriate fan curve. Note: The fan curves include refrigerant coil and internal cabinet static loses.
6. Calculate supply fan motor heat by using the following equation: Fan motor heat (MBh) = 2.8 x fan motor brake horsepower
7. Determinenet total capacity andnet sensible capacity bysubtracting fan motor heatfrom gross total capacity and gross sensible capacity.
8. Refer to theTrane psychometric chart to determine leaving air temperatures.

Waterside Economizer Capacity

1. After determining that the unit will meet the required mechanical cooling capacity, determine the waterside economizer capacity by referring to the appropriate two-row (low capacity) or four-row (high capacity) waterside economizer capacity tables for the unit size.
2. Determine entering air temperature dry bulb and wet bulb, condenser water flow (gpm), and economizer entering water temperature.
3. Refer to the appropriate waterside economizer table to find gross total and sensible capacity and the leaving water temperature.
4. Apply the cfm correction factor for the waterside economizer from the appropriate table to determine the gross total and sensible capacities at the desired cfm.
5. Multiply the condenser water deltaT by the total capacity cfm correction factor to determine the new deltaT.
6. Calculate supply fan motor heat by using the following equation: Fan motor heat (MBh) = 2.8 x fan motor brake horsepower
7. Determine net total and sensible capacity by subtracting fan motor heat from gross total and sensible capacity.
8. Refer to theTrane psychometric chart to determine leaving air temperatures.

Selection Example

Design Conditions
Total gross capacity required = 368.7 MBh = 31Tons Total sensible capacity required = 259 MBh
Entering air temperature = 80/67°F Entering water temperature = 85 gpm = 105
PKG-PRC003U-EN 17
Selection Procedure
Selection Procedure
Airflow = 14200 cfm at 2.5-inch duct static pressure
Unit to include: Constant Volume
Waterside economizer
Medium velocity throwaway filters
Unit Selection
Tentatively select a 35 ton unit. Refer to Table 13, p. 36 to obtain gross total and sensible unit
capacities, and gpm at the design conditions:
Total capacity = 370 MBh
Sensible capacity = 282 MBh LWT = 95.4°F
Since the design cfm is greater than the nominal cfm, adjust the capacities and condenser water deltaT to reflect the higher cfm:
design cfm/nominal cfm 14,240/14,000 + 3% from nom. Cfm
Refer to Table 6, p. 29 to obtain the capacity correction factors for +3% of nominal cfm:
Cooling capacity multiplier = 1.005 Sensible capacity multiplier = 1.014
Multiply the capacities by the correction factors:
370 MBh x 1.005 = 371.85 MBh 282 MBh x 1.014 = 285.95 MBh
The SCWG 35 meets the total and sensible design requirements.
Multiply the deltaT of 10.4°F, by the cooling capacity correction factor of 1.005 to obtain new delta
T of 10.45 and add this to the entering water temperature to obtain the actual leaving water
temperature, 95.45°F.
Determine static air pressure drops through the accessories at the design cfm by referring to
Figure 6, p. 25 through Figure 11, p. 27.
4-row waterside economizer = 0.55 in.Medium velocity filters = 0.41 in.Add this to the 2.5-inchduct static pressure fora total external staticpressure of 3.46 inches. Refer tothe fan curvewith Constant
Volume, Figure 18, p. 37 to determine approximate brake horsepower and fan rpm:
Fan brake horsepower = 25 bhp Fan rpm = 1850 rpm
Determine net capacities by subtracting fan motor heat from gross capacities:
2.8 x 25 bhp = 70.0 MBh
Net total capacity = 371.85 MBh - 70.0 MBh = 301.85 MBh Net sensible capacity = 285.95 MBh - 70.0 MBh = 215.95 MBh
Determine waterside economizer (full coil) capacity by referring to Table 13, p. 36. Use entering air of 80/67°F and entering water temperature of 55°F at 105 gpm. The table provides a gross total capacity of 263.6 MBh and gross sensible capacity of 263.6 MBh and 60.0°F leaving water temperature at nominal cfm.
Determine gross capacities at design cfm by applying the cfm correction factors from waterside economizer from Table 6, p. 29. Use the following correction factors:
263.6 MBh x 1.005 = 264.92 MBh
263.6 MBh x 1.014 = 267.29 MBh
Apply the cooling correction factor to water deltaT to determine new delta T of 5.03°F.
Determine net capacities by subtracting fan motor heat for net total capacity of 194.92MBh andnet sensible capacities of 197.29 MBh.

Model Number Descriptions

Modular Series Self­Contained
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
Digit4-Development Sequence
G = modular series
Digit 5 - Refrigerant Circuit Configuration
U = independent, R-410A refrigerant
Digits 6, 7 - Unit Nominal Capacity
20 = 20Tons (water or air cooled) 25 = 25Tons (water or air cooled) 30 = 30Tons (water cooled only) 32 = 32Tons (air cooled only) 35 = 35Tons (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
2 = I-Pak &VFD & supply air temp ctrl 3 = I-Pak &VFD w/ bypass & 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
Digits 10, 11 - Design Sequence
** = Factory Assigned
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 = vert. dis. w/ double wall, ship sep. G = horizontal discharge, ship
separate H = horiz. dis. w/ double wall, ship
sep.
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 w/ 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
2 = ODP motor 3 = TEFC motor
Digits 15, 16 - Motor HP
05 = 5 hp 07 = 7.5 hp 10 = 10 hp 15 = 15 hp 20 = 20 hp 25 = 25 hp
Digits 17, 18, 19 - Fan RPM
085 = 850 rpm 090 = 900 rpm 095 = 950 rpm 100 = 1000 rpm 105 = 1050 rpm 110 = 11 0 0 r p m 115 = 1150 rpm 120 = 120 0 rpm 125 = 1250 rpm 130 = 130 0 rpm 135 = 1350 rpm 140 = 1400 rpm 145 = 1450 rpm 150 = 150 0 rpm 155 = 1550 rpm 160 = 160 0 rpm 165 = 1650 rpm 170 = 170 0 rpm 175 = 1750 rpm 180 = 180 0 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
T = hi-cap. hot water coil, LH
U = hi-cap hot water coil, LH, ship sep V = hi-cap hot water coil, RH W = hi-cap hot water coil, RH, ship sep
0 = none
Digit 21 - Unit Isolators
A = isopads
B = spring isolators
0 = none
Digit 22 - Unit Finish
1 = paint - slate gray
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
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 capacity
(4-row)
B = mechanical clean low capacity
(2-row)
C = chemical clean full capacity
(4-row)
D = chemical clean low capacity
(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
PKG-PRC003U-EN 19
Model Number Descriptions
Digit 28 - Ventilation Control
B = airside econ w/Traq™ damper
(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)
F = airside econ w/ std dampers and
comparative enthalpy (top O/A)
H = none/ventilation for 2-position
control interface J = airside economizer interface K = airside economizer interface w/
comparative enthalpy 0 = None
Digit 29 - Water Piping
A = RH condenser connection
B = LH condenser connection C = RH basic piping D = LH basic piping E = RH intermediate piping F = LH intermediate piping J = RH basic w/ flow switch K = LH basic w/ flow switch L = RH intermediate w/ flow switch M = LH 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 (IPCB) 3 = dirty filter switch 4 = 1 and 2 5 = 1 and 3 6 = 2 and 3 7 = 1, 2, and 3 0 = none
Digit 33 - Control Interface Options
A = Generic BAS Module; 0-5VDC
(GBAS)
B = Ventilation Override Module
(VOM) D = Remote Human Interface (RHI) G = GBAS &VOM H = GBAS & RHI J = VOM & RHI M = GBAS & VOM & RHI N = BACnet Communications
Interface (BCI) P = BCI and GBAS Q = BCI and VOM R = BCI and RHI
T = BCI and GBAS andVOM
U = BCI and GBAS and RHI
V = BCI and VOM and RHI W = BCI and GBAS andVOM and RHI
0 = None 1 = LonTalk Comm5 Interface (LCI) 2 = LCI and GBAS 3 = LCI and VOM 4 = LCI and RHI 5 = LCI and GBAS andVOM 6 = LCI and GBAS and RHI 7 = LCI and VOM and RHI 8 = LCI and GBAS andVOM and RHI
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
Model Number Descriptions
Self-Contained Ship-
With Accessory
Model Number
Digit1-Parts/Accessories
P = parts/accessories
Digit 2 - Unit Model
S = self-contained
Digit 3 - Shipment
W = with unit
Digit4-Development Sequence
F = signature series G = modular series
Digit5-Sensors and Other
Accessories
S = sensors
Digit6-Sensors and
Thermostats (Field Installed)
A = BAYSENS077 - zone temp only
(CV and VAV)
B = BAYSENS073- zone temp with
timed override button (CV and VAV)
C = BAYSENS074 - zone temp with
timed override button, setpoint dial (CV and VAV)
E = BAYSENS108 - CV zone sensor
-dual setpoint, man/auto changeover
F = BAYSENS110 - CV zone sensor-
dual setpoint, man/auto changeover w, indicastor lights
G = BAYSENS119 - CV/VAV program-
mable night setback Sensor
H = BAYSENS021 -VAV zone sensor
with indicator lights
K = BAYSTAT150 2H/2C ProgTstat w/
BAYSTAT077 Remote Sensor L = outside air temperature sensor kit M = outside air humidity sensor kit N = BAYSTAT155 3H/2CTstat P = BAYSTAT150 2H/2C
ProgrammableTstat 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
Digit9-Future Option
0 = none
Digits 10, 11 - Design Sequence
** = Factory Assigned

Remote Air-Cooled Condenser

Digit 1 - Unit Model
C = Condenser
Digit 2 - Unit Type
C = Commercial I = Industrial
Digit 3 - Condenser Medium
R = Remote
Digit4-Development Sequence
C=C
Digits 5, 6, 7 - Nominal Capacity
020 = 20Tons 029 = 29Tons 032 = 32Tons
Digit 8 - Unit Voltage
4 = 460 Volt/60 Hz/3 ph 5 = 575 Volt/60 Hz/3 ph 6 = 200 Volt/60 Hz/3 ph
Digit 9 - Control Option
0 = No Low Ambient, I-Pak
A = No Low Ambient, T-stat
B = Low Ambient, I-Pak C = Low Ambient, T-stat
Digits 10, 11 - Design Sequence
** = Factory Assigned
Digit 12 - Unit Finish
1 = Paint - Slate Gray 2 = Protective Coating 3 = Protective Coating with
Finish Coat
4 = Unpainted Unit
Digit 13 - Coil Options
A = Non-Coated Aluminum
C = Protective Coated Aluminum
Digit 14 - Unit Isolators
0 = None
A = Spring Isolators
B = Isopads
Digit 15 - Panels
0 = None 1 = Louvered Panels
Digit 16 - Agency
0 = None
T = UL Listing
PKG-PRC003U-EN 21

General Data

Table 1. SCWG/SIWG/SCRG/SIRG general data
Water-Cooled Units Air-Cooled Units
Unit Size 20 25 30 35 20 25 32
Compressor Data
Quantity 2 2 1/1 2 2 1/1 2 Nominal Ton/Comp 10 10 10/15 15 10 10/15 15 Circuits 2 2 2 2 2 2 2
Evaporator Coil Data
Rows 2 4 4 4 3 4 4 Sq. Ft. 22.5 25.0 25.0 25.0 25.0 25.0 25.0 FPF 144 144 144 144 144 144 144
Condenser Data
Minimum GPM w/o Econ 36 36 46 54 - - ­Minimum GPM w/ Econ 41 41 60 65 - - ­Maximum GPM 80 80 102 119 - - -
Evaporator Fan Data
Quantity 2 2 2 2 2 2 2 Size (Dia. x width - inches) 12 5/8"x8" 12 5/8"x9" 12 5/8"x11" 12 5/8 x11" 12 5/8"x8" 12 5/8"x9" 12 5/8"x11" Minimum HP 5 5 5 5 5 5 5 Maximum HP 20 25 25 25 20 25 25
Minimum Design CFM 6350 7250 7250 7250 7250 7250 7250
Maximum Design CFM 8500 10,625 12,750 14,875 8500 10,625 13600
R-410A Refrigerant Data
EER 14.0 14.3 14.1 14.0 10.0 10.1 10.4 IEER (CV) 14.1 14.8 15.4 15.6 10.8 11.8 11.9 IEER (VFD) 17.1 18.1 18.2 17.7 13.4 13.3 13.8 Refrigerant Charge - lb (kg)
Circuit A 19.0 (8.6) 24.0 (10.9) 24.5 (11.1) 23.0 (10.4) See Note 3 See Note 3 See Note 3
Circuit B 19.0 (8.6) 24.0 (10.4) 23.0 (10.4) 23.0 (10.4) See Note 3 See Note 3 See Note 3
Capacity Steps - % 100/53/0 100/53/0 100/65/42/6 100/53/0
Filter Data
Quantity 4 4 4 4 4 4 4
Size (inches) 16x25x2 16x25x2 16x25x2 16x25x2 16x25x2 16x25x2 16x25x2 Quantity 4 4 4 4 4 4 4
Size (inches) 20x25x2 20x25x2 20x25x2 20x25x2 20x25x2 20x25x2 20x25x2
CCRC/CIRC Condenser Match
Notes:
1. Compressors are Trane 3D™scroll.
2. EER and IEER are rated in accordance to the AHRI Standard 340/360-2010. Based on 80/67°F (26.7/19.4°C) to the evaporator coil, nominal airflow
and 85-95°F (29.4-35°C) condenser water or 95° F (35° C) ambient.
3. All units operate with R-410A. Water Cooled units ship with full operating charge. Air-cooled Units ship with dry nitrogen charge. Field refrigerant system charge required. Refer to Table 3, p. 23 for amounts required.
4. Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.
5. Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.
6. Filter sizes are for units without hot water or steam heating coils
- - - - 20 29 32
General Data
Table 2. SCWG/SIWG/SCRG/SIRG self-contained heating coil
Filter Data for Heating Coil
Quantity 4 Size (inches) 20x18x2 Size (mm) (508x457x51) Quantity 8 Size (inches) 20x20x2
Size (mm) (508x508x51)
Coil Data Type Rows No. - Size (in) No. - Size (mm) fpf
Steam Coil NS 1 2 - 24 x 58 2 - 609.6x1473.2 42 Hot Water Coil, std. cap 5W 1 1 - 48 x 62 1 - 1219 x 1575 80 Hot Water Coil, hi-cap. 5W 2 1 - 48 x 62 1 - 1219 x 1575 108
Notes:
1. Hot water and steam heating coils have Prima-Flo® fins and do not have turbulators.
2. For coil capacities, use TOPSS™ (Trane Official Product Selection Program).
Table 3. SCRG/SIRG self-contained and CCRC/CIRC remote air-cooled condenser, refrigerant data
SCRG/SIRG & CCRC/CIRC Unit Size 20/20 25/29 32/32
No. of Refrigerant Circuits 222 Operating Charge - lbs R-410A 36.5/36.5 48.5/36 46/46 Operating Charge - kg R-410A 16.6/16.6 22/16.3 20.9/20.9 Cond. Storage Cap. - lbs R-410A 37/37 51/37 51/51 Cond. Storage Cap. - kg R-410A 16.8/16.8 23.1/16.8 23.1/23.1
Notes:
1. Refrigerant charges are listed as circuit 1/circuit 2 and provide only an estimate. Final charge requires sound field charging practice.
2. Operating charge estimate includes the air-cooled self-contained, remote air-cooled condenser, and 25 feet of interconnecting refrigerant piping.
3. At conditions of 95°F (35°C), condenser storage capacity is 95% full.
4. To determine the correct amount of refrigerant needed for a particular application, reference the Trane Reciprocating Refrigeration Manual.
Table 4. Waterside economizer coil physical data
Model Unit Size Type Rows FPF height (in) length (in)
SCXG 20, 25, 30 & 35 Chemically Cleanable 2 108 50 72 SCXG 20, 25, 30 & 35 Mechanically Cleanable 2 108 50 72 SCXG 20, 25, 30 & 35 Chemically Cleanable 4 108 50 72 SCXG 20, 25, 30 & 35 Mechanically Cleanable 4 108 50 72
PKG-PRC003U-EN 23
General Data
Table 5. CCRC/CIRC remote air-cooled condenser general data
Unit Size 20 29 32
Condenser Fan Data
Number/Type/Drive 4/Prop/Direct 4/Prop/Direct 4/Prop/Direct
Size (inches) 26 26 26 HP ea. 111 Nominal Cfm 18,800 21,200 32,000
Condenser Coil Data
Circuit 1 Size (in.) 1/46x71 1/46x71 1/64x71
Circuit 2 No./Size (in.) 1/46x71 1/64x71 1/64x71 Face Area (sq. ft.) 45.4 54.2 63.1
Rows/fpf 4/144 4/144 4/144
Ambient Temperature Operating Range
Standard Ambient (°F) 50-115 50-115 50-115 Low Ambient Option (°F) 0-115 0-115 0-115

Performance Data

Airside Pressure Drop

Figure 6. Filter airside pressure drop
Note: In Figure 6, p. 25, lines 1 and 3 are for the SXWG 20 ton only. Lines 2 and 4 are for all air-cooled units and all SXWG
25-35 tons.
Figure 7. Horizontal discharge plenum airside pressure drop
PKG-PRC003U-EN 25
Performance Data
Figure 8. Traq™ damper airside pressure drop
Figure 9. Waterside economizer airside pressure drop
Figure 10. Steam coil airside pressure drop
Performance Data
Figure 11. Airside economizer airside pressure drop
PKG-PRC003U-EN 27
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