Trane WSC036A Installation Operation & Maintenance
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Trane WSC036A Installation Operation & Maintenance

Packaged heat pump 3 through 10 ton
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Operation
Packaged Heat Pump
3 Through 10 Ton
Model Numbers
WSC036A - WSC120A
WSC036E - WSC060E
February 2009

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Summary of Contents for Trane WSC036A

  • Page 1 Installation Operation Maintenance Packaged Heat Pump 3 Through 10 Ton Model Numbers WSC036A - WSC120A WSC036E - WSC060E RT-SVX23D-EN February 2009...
  • Page 2 CFCs such as HCFCs and HFCs. Responsible Refrigerant Practices! Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified. The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures.

  • Page 3: Unit Nameplate

    R-22 refrigerant. Use ONLY R-410A rated service equipment or components with this unit. For specific handling concerns with R-410A, please contact your local Trane representative. Failure to use R-410A rated service equipment or components could result in equipment exploding under R-410A high pressures which could result in death, serious injury, or equipment damage.
  • Page 4 Table of Contents Warnings, Cautions and Notices ......... 2 Overview of Manual .
  • Page 5 Economizer, Dry Bulb 0-100% DIGIT 21 - Communications without Barometric Relief Options Economizer, Dry Bulb 0-100% withBarometric Relief No Communications Interface Economizer, Reference Enthalpy Trane Communications Interface 0-100% without Barometric Relief LonTalk® Communications Economizer, Reference Enthalpy Interface 0-100% with Barometric Relief RT-SVX23D-EN...

  • Page 6: General Information

    It is capable of delivering up to 25 inch pounds of torque and is powered by 24 VAC. RTCI -- ReliaTel™ Trane Communication Interface (Optional) This module is used when the application calls for an ICSTM building management type control system.
  • Page 7 General Information RTOM – ReliaTel™ Options Module (Optional) The RTOM monitors the supply fan proving, clogged filter, supply air temperature, exhaust fan setpoint, supply air tempering, Frostat™ and smoke detector. Refer to system input devices and functions for operation. System Input Devices & Functions The RTRM must have a zone sensor or thermostat input in order to operate the rooftop unit.
  • Page 8 General Information restart tyhe compressor. On dual compressor units only the affected compressor circuit is locked out. High Pressure Control (Optional — Standard on R-410A models) The high pressure controls are wired in series between the compressor outputs on the RTRM and the compressor contactor coils.
  • Page 9 Remote Zone Sensor (BAYSENS074*) This electronic sensor features single setpoint capability and timed override with override cancellation. It is used with a Trane Integrated ComfortTM building management system. Remote Zone Sensor (BAYSENS016A) This bullet type temperature sensor can be used for; outside air (ambient) sensing, return air temperature sensing, supply air temperature sensing, remote temperature sensing (uncovered.

  • Page 10: Table.

    General Information Note: Important! Periodic checks and maintenance procedures must be performed on the smoke detector to insure that it will function properly. For detailed instructions concerning these checks and procedures, refer to the appropriate section(s) of the smoke detector Installation and Maintenance Instructions provided with the literature package for this unit.
  • Page 11 Pre-Installation Unit Inspection As soon as the unit arrives at the job site • Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data). • Verify that the power supply complies with the unit nameplate specifications. •...
  • Page 12 Pre-Installation • the unit is set on the roof curb, and temporary heat is provided in the building. Isolate all side panel service entrances and base pan openings (e.g., conduit holes, S/A and R/A openings, and flue openings) from the ambient air until the unit is ready for start-up. Note: Do not use the unit’s heater for temporary heat without first completing the start-up procedure detailed under “Starting the Unit”...
  • Page 13 Unit Clearances Figure 1. Typical Installation Clearances for Single & Multiple Unit Applications 072A THROUGH 120A UNITS 072A THROUGH 120A UNITS 033A THROUGH 063A UNITS 033A THROUGH 063A UNITS TSC072E THROUGH TSC120E UNITS TSC072E THROUGH TSC120E UNITS 036A THROUGH 060A UNITS 036A THROUGH 060A UNITS THC048E AND THC060E UNITS THC048E AND THC060E UNITS...
  • Page 14 Unit Clearances Figure 2. Unit Dimensional Data WSC036A, WSC048A, WSC060A Figure 3. Unit Dimensional Data WSC036E, WSC048E RT-SVX23D-EN...
  • Page 15 Unit Clearances Figure 4. Unit Dimensional Data WSC072A, WSC090A, WSC060E Figure 5. Unit Dimensional Data WSC120A RT-SVX23D-EN...
  • Page 16 Table 1. Typical Unit Weights & Point Loading Data Center of Corner Wt. (lbs) Gravity (In.) Weight Unit Model (lbs) Length Width WSC036A(1,3,4,W)* WSC036E(1,3,4,W)* WSC048A1* WSC048A(3,4,W)* WSC048E(1,3,4,W)* WSC060A(1,3,4,W)* WSC060E(1,3,4,W)* WSC060(A,B)(D,T)* WSC072A(3,4,W)* WSC072(A,B)(D,T)*...

  • Page 17: 2. Net Weight Should Be Added To Unit Weight When Ordering Factory

    Unit Clearances Table 2. Typical Unit Weights & Point Loading Data Net Weight Accessory 3-5 Tons 6-10 Tons Economizer Barometric Relief Powered Exhaust Motorized Outside Air Damper Manual Outside Air Damper Roof Curb Oversized Motor Belt Drive Motor Smoke Detector, Return Smoke Detector, Supply Coil Guards Hinged Doors...
  • Page 18 When attaching the ductwork to the unit, provide a water- tight flexible connector at the unit to prevent operating sounds from transmitting through the ductwork. All outdoor ductwork between the unit and the structure should be weather proofed after installation is completed. Figure 8. WSC036A-WSC060A, WSC036E, WSC048E Horizontal Unit Supply & Return Air Openings RT-SVX23D-EN...
  • Page 19 Installation Figure 9. WSC036A-WSC060A, WSC036E, WSC048E Downflow Unit Supply & Return Air Openings Figure 10. WSC072A-WSC120A, WSC060E Horizontal Unit Supply & Return Air Openings RT-SVX23D-EN...
  • Page 20 Installation Figure 11. WSC072A-WSC120A, WSC060E Horizontal Unit Supply & Return Air Openings Roof Curb DownflowThe roof curbs for these units consists of a “full perimeter” enclosure to support the unit. Before installing any roof curb, verify; 1. That it is the correct curb for the unit, 2.
  • Page 21 Installation Recommendations for installing the Supply Air and Return Air ductwork joining the roof curb are included in the curb instruction booklet. Curb ductwork must be fabricated and installed by the installing contractor before the unit is set into place. Note: For sound consideration, cut only the holes in the roof deck for the ductwork penetrations.

  • Page 22: General Unit Requirements

    Installation 6. Lift the unit enough to allow the removal of two Fork Lift brackets and hardware. Remove the two Fork Lift brackets, two metal runners and three wooden boards as shown in the following Figure. Figure 12. Fork lift pockets 7.
  • Page 23 Installation Horizontal Discharge Conversion WSC036A-WSC060A, WSC036E, WSC048E • Supplies Needed by Installer for Conversion: 3 oz. tube of High Temperature RTV sealant. (500°F/260°C: Similar to Dow Corning 736) Note: Failure to use recommended sealant could result in unit performance loss.
  • Page 24 Installation Figure 15. Supply duct cover with RTV installed 5. Slide RETURN DUCT COVER (insulation side up) into supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange. Secure out-ward edge of the duct cover with two screws.
  • Page 25 Installation 4. On original RETURN DUCT COVER, apply ¼” (6mm.) continuous bead of 500°F RTV sealant around flange (opposite insulation side), as shown. Figure 17. RTV Sealant 5. Slide RETURN DUCT COVER (insulation side up) into supply opening until inward edge of duct cover engages with the 2 retaining clips on the duct flange.
  • Page 26 Installation Table 3. Unit Electric Heater Model Number Model Number WSC072A4, 090A4 BAYHTRS427A, 436A WSC072AW, 090AW BAYHTRSW27, W36 WSC120A4 BAYHTRT454A WSC120AW BAYHTRTW54A 1. Remove the heater section access panel and open the electric heater dead front panel. 2. TCO-A is the limit control located in the central part of the heater mounting plate and that is located on the bottom of the two heater element assemblies.
  • Page 27 Installation 3. Lift the tube and bracket from the downflow duct opening. Rotate the tube and bracket assembly 180° degrees ensuring that the holes on the copper sensing tube face away from the unit and face the return air ductwork. Refer to Horizontal View. Note: Check to insure that the flexible tubing lies flat on the base pan surface.
  • Page 28 Installation • Connect properly sized control wiring to the proper termination points between the zone thermostat and the unit control panel. Condensate Drain Configuration An evaporator condensate drain connection is provided on each unit. Refer to Figure 4 for the appropriate drain location.
  • Page 29 Installation Figure 21. Condensate Trap Installation Filter Installation Each unit ships with filters installed. The quantity of filters is determined by unit size. Access to the filters is obtained by removing the indoor fan access panel. To modify the 3, 4 or 5 ton unit’s filter rack to accept two inch filters, remove the L-shaped angle attachment screws and rotate the angles 90 degrees.
  • Page 30 Installation 2. Provide proper grounding for the unit in accordance with local and national codes. Main Unit Power Optional TBUE Wiring (Through the Base Electrical Option) 1. Location of the applicable electrical service is illustrated below. Refer to the customer connection diagram that is shipped with the unit for specific termination points.
  • Page 31 Installation Control Power Transformer WARNING Hazardous Voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. The 24 volt control power transformers are to be used only with the accessories called out in this manual.
  • Page 32 Installation 2. Ensure that the wiring between controls and the unit’s termination point does not exceed two and a half (2.5) ohms/conductor for the length of the run. 3. Do not run the electrical wires transporting DC signals in or around conduit housing high voltage wires.
  • Page 33 Installation Figure 24. ReliaTel refrigeration module Figure 25. Customer control low voltage routing RT-SVX23D-EN...
  • Page 34 Installation Smoke Detector - (ReliaTel™ only) Customer Low Voltage Wiring- When interlocking System Sensor smoke detectors together, all of the detectors must be powered from the same power supply. If multiple smoke detectors are required, all detectors must be disconnected from the HVAC unit power supply and connected together from another single source supply.
  • Page 35 Pre-Start Space Temperature Averaging (ReliaTel™ only) Space temperature averaging is accomplished by wiring a number of remote sensors in a series/ parallel circuit. Using the BAYSENS016* or BAYSENS077*, at least four sensors are required to accomplish space temperature averaging. Example #1 illustrates two series circuits with two sensors in each circuit wired in parallel.
  • Page 36 Pre-Start Figure 28. Typical field wiring diagrams for optional controls BAYSENS077* ASYSTAT111* BAYSENS107* BAYSENS119* ASYSTAT777* Zone Sensor BAYSENS077* ASYSTAT111* BAYSENS073* Zone Sensor BAYSENS109* BAYSENS119* ASYSTAT777* BAYSENS074* Zone Sensor BAYSENS109* RT-SVX23D-EN...
  • Page 37 Pre-Start Table 6. Temperature versus resistance (temperature vs. resistance is negative) Temperature Nominal Degrees F° Degrees C° Resistance -20° -28.9° 170.1 K - Ohms -15° -26.1° 143.5 K - Ohms -10° -23.3° 121.4 K - Ohms -5° -20.6° 103.0 K - Ohms 0°...
  • Page 38 Pre-Start • Verify that the correct size and number of filters are in place. • Inspect the interior of the unit for tools and debris and install all panels in preparation for starting the unit. Voltage Imbalance Three phase electrical power to the unit must meet stringent requirements for the unit to operate properly.
  • Page 39 Pre-Start Yellow (phase C) toL3 • Close the field supplied main power disconnect switch or circuit protector switch that provides the supply power to the unit. WARNING Live Electrical Components! During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components.
  • Page 40 Pre-Start Upon power initialization, the RTRM performs self-diagnostic checks to insure that all internal controls are functional. It also checks the configuration parameters against the components connected to the system. The Liteport LED located on the RTRM module is turned “On” within one second of power-up if internal operation is okay.

  • Page 41: Oversized Motor 5

    Start-Up Table 7. Service test guide for component operation Econ (Note Test Step Mode Comp1 Comp 2 Heat 1 Heat 2 Ohms Minimum Position 2.2K Setpoint 0% Minimum Selectable Ventilation Economizer Test Open 3.3K Open Minimum Cool Stage 1 On (Note 1) Off 4.7K Position Minimum...
  • Page 42 Start-Up 3. Add the total accessory static pressure drop (step 2) to the duct external static pressure (step 1). The sum of these two values represents the total system external static pressure. 4. Measure the amperage at the supply fan contactor and compare it with the full load amp (FLA) rating stamped on the motor nameplate.
  • Page 43 Start-Up 2. Measure the amperage at the supply fan contactor and compare it with the full load amp (FLA) rating stamped on the motor nameplate. a. a. Calculate the theoretical BHP Actual Motor Amps X Motor HP Motor Nameplate Amps b.
  • Page 44 Start-Up 3. Add the total accessory static pressure drop (step 2) to the duct external static pressure (step 1). The sum of these two values represents the total system external static pressure. Using the Fan Performance Tables in the Service Facts, look up the selected speed tap setting and match the measured ESP to determine the approximate CFM.
  • Page 45 Start-Up Momentarily jump across the Test 1 & Test 2 terminals on LTB1 one additional time if continuing from previous component start-up or until the desired start-up component Test is started. 4. Verify that the dampers stroked to the full open position. 5.

  • Page 46: Unit Mounted Disconnect 5

    Start-Up Final System Setup After completing all of the pre-start and start-up procedures outlined in the previous sections (i.e., operating the unit in each of its Modes through all available stages of cooling & heating), perform these final checks before leaving the unit: •...

  • Page 47: Rt-Svx23D-En

    Start-Up 5. Remove the belt tension gauge. The small O-ring now indicates a number other than zero on the plunger’s force scale. This number represents the force (in pounds) required to give the needed deflection. 6. Compare the “force” scale reading (Step 5) with the appropriate “force” value listed in Table If the “force”...
  • Page 48 Maintenance Monthly Maintenance Before completing the following checks, turn the unit OFF and lock the main power disconnect switch open. WARNING Rotating Components! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.
  • Page 49 Maintenance Record this data on an “operator’s maintenance log” like the one shown in Table 9. If the operating pressures indicate a refrigerant shortage, measure the system superheat. For guidelines, refer to the “Compressor Start-Up” section. Note: Do Not release refrigerant to the atmosphere! If adding or removing refrigerant is required, the service technician must comply with all federal, state and local laws.
  • Page 50 Maintenance WARNING Hazardous Chemicals! Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety refer to the cleaning agent manufacturer’s Materials Safety Data Sheet and follow all recommended safe handling practices.
  • Page 51 Maintenance Final Process For future reference, you may find it helpful to record the unit data requested below in the blanks provided. Complete Model Number _________________________________________________________________________ Unit Serial Number _________________________________________________________________________ Wiring Diagram Numbers (from unit control panel) _________________________________________________________________________ Schematics _________________________________________________________________________ Connections _________________________________________________________________________ Table 9.

  • Page 52: Trouble Shooting

    Trouble Shooting The RTRM has the ability to provide the service personnel with some unit diagnostics and system status information. Before turning the main power disconnect switch “Off” , follow the steps below to check the ReliaTel Refrigeration Module (RTRM). All diagnostics & system status information stored in the RTRM will be lost when the main power is turned “Off”...
  • Page 53 Trouble Shooting Method 1 If the Zone Sensor Module (ZSM) is equipped with a remote panel with LED status indication, you can check the unit within the space. If the ZSM does not have LED’s, use Method 2. BAYSENS110*, BAYSENS109*, BAYSENS119*, & BAYSENS023A all have the remote panel indication feature. The LED descriptions are listed below.
  • Page 54 Trouble Shooting Simultaneous Heat and Cool Failure 1. Emergency Stop is activated. Method 2 The second method for determining system status is done by checking voltage readings at the RTRM (J6). The system indication descriptions and the approximate voltages are listed below. System Failure Measure the voltage between terminals J6-9 &...
  • Page 55 Trouble Shooting Method 2 To reset the system at the unit, cycle the unit power by turning the disconnect switch “Off” and then “On” . Lockouts can be cleared through the building management system. Refer to the building management system instructions for more information. Zone Temperature Sensor (ZTS) Service Indicator The ZSM SERVICE LED is a generic indicator, that will signal the closing of a Normally Open switch at any time, providing the Indoor Motor (IDM) is operating.
  • Page 56 Trouble Shooting Cool SP = Terminals 2 and 3 Range = 100 to 900 Ohms approximate Heat SP = Terminals 2 and 5 Range = 100 to 900 Ohms approximate Test 3 System Mode and Fan Selection The combined resistance of the Mode selection switch and the Fan selection switch can be measured between terminals 2 and 4 on the Zone Sensor.
  • Page 57 Trouble Shooting Unit Operation without a Zone Sensor This procedure is for temporary operation only. The economizer and condenser fan cycling functions are disabled. 1. Open and Lock the unit disconnect switch. 2. Remove the Outside Air Sensor (OAS) from the condenser section of unit. 3.

  • Page 58: Wiring Diagrams

    Wiring Diagrams Note: For easier access, published unit wiring diagrams (individual, separate diagrams for unitary product lines) will become available via e-Library instead of through wiring manuals after 2007 . For diagrams prior to 2008 please refer to wiring diagram book W_C-SVE001B-EN for heat pump units.

  • Page 59: Limited Warranty

    Models Less Than 20 Tons for Residential Use* This limited warranty is extended by Trane Inc., to the original purchaser and to any succeeding owner of thereal property to which the Heat Pump is originally affixed, and applies to products purchased and retained for use within the U.S.A.
  • Page 60 Models Less Than 20 Tons for Commercial Use* This warranty is extended by Trane Inc., to the original purchaser and to any succeeding owner of the real property to which the Heat Pump is originally affixed, and applies to products purchased and retained for use within the U.S.A.
  • Page 64 Literature Order Number RT-SVX23D-EN Date February 2009 Supersedes RT-SVX23D-EN (December 2008) The manufacturer has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

This manual is also suitable for:

Wsc120aWsc036eWsc060e

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