Trane Precedent WSJ150A Installation, Operation And Maintenance Manual
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Trane Precedent WSJ150A Installation, Operation And Maintenance Manual

Packaged rooftop air conditioners
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Installation, Operation, and Maintenance
Packaged Rooftop Air
Conditioners
Precedent™ Heat Pump
Standard Efficiency
12.5 to 25 Tons — 60 Hz
Model Numbers: WSJ150A - WSJ300A
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.
December 2022
SAFETY WARNING
PKGP-SVX010A-EN

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Summary of Contents for Trane Precedent WSJ150A

  • Page 1 Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent™ Heat Pump Standard Efficiency 12.5 to 25 Tons — 60 Hz Model Numbers: WSJ150A - WSJ300A SAFETY WARNING 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.
  • Page 2 (HCFCs). Not all refrigerants containing these compounds bump cap, fall protection, electrical PPE and arc have the same potential impact to the environment. Trane flash clothing). ALWAYS refer to appropriate advocates the responsible handling of all refrigerants-...
  • Page 3 Follow EHS Policies! This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in Failure to follow instructions below could result in part without written permission. Trane reserves the right to death or serious injury.
  • Page 4 Table of Contents Model Number Description ....6 Phase Monitor ......11 General Information .

  • Page 5: Table Of Contents

    Table of Contents Sequence of Operation ....34 Coil Cleaning ......37 Coil Cleaning Procedure .
  • Page 6 Model Number Description Digit 1 — Unit Function Digit 18 — Through-the-Base Provisions Digit 12, 13 — Service Sequence W = Packaged Heat Pump ** = Factory Assigned 0 = No Through-the-Base Provisions A = Through-the-Base Electric Digit 2 — Cooling Efficiency Digit 14 —...
  • Page 7 Model Number Description Digit 25— System Monitoring Controls 0 = No Monitoring Control 1 = Clogged Filter Switch 2 = Condensate Overflow Switch 3 = Discharge Air Sensing Tube 4 = Clogged Filter Switch and Condensate Overflow Switch 5 = Clogged Filter Switch and Discharge Air Sensing Tube 6 = Condensate Overflow Switch and Discharge Air Sensing Tube...
  • Page 8 General Information Unit Inspection Note: Do not use the unit’s heater for temporary heat without first completing the start-up. To protect against loss due to damage incurred in transit, The manufacturer will not assume any responsibility for perform inspection immediately upon receipt of the unit. equipment damage resulting from condensate Check carefully for shipping damage.
  • Page 9 General Information Compressor Nameplate of the filter switch. For further details, refer to Installation Instructions ACC-SVN238*-EN. The nameplate for the compressors are located on the side Note: On units equipped with factory installed MERV 13 of the compressor. filters, a clogged filter switch with different pressure settings will be installed.
  • Page 10 This sensor features remote zone sensing and timed LCD display provides heat, cool, auto, on, and off status. override with override cancellation. It is used with a Trane Display includes two temperature setpoints, and a lockable Integrated Comfort™ building management system.
  • Page 11 General Information Touch Screen Programmable Zone Notes: Sensor (BAYSENS800) • The supply air smoke detector samples supply air. The return smoke detectors sample return This sensor uses a BACnet® MS/TP link to communicate air. The smoke detectors are designed to shut zone temperature and setpoints.
  • Page 12 Pre-Installation WARNING • Use a NIOSH approved dust/mist respirator. • Avoid contact with the skin or eyes. Wear long-sleeved, Fiberglass Wool! loose-fitting clothing, gloves, and eye protection. Exposure to glass wool fibers without all necessary • Wash clothes separately from other clothing: rinse PPE equipment could result in cancer, respiratory, washer thoroughly.
  • Page 13 Dimensional Data Figure 2. 12.5 to 25 tons standard efficiency GAS CONNECTION 3/4 NPT (280, 320, 400 MBh) INDOOR TOP PANEL CONTROL BOX SECTION ACCESS PANEL 2" ELECTRICAL CONN SINGLE POINT OUTDOOR TOP PANEL POWER "W" MODELS ONLY EVAPORATOR SECTION ACCESS PANEL CONDENSATE DRAIN 59'' D.0 CAB OR...
  • Page 14 Dimensional Data Figure 3. 12.5 to 25 tons standard efficiency – downflow airflow supply/return, through-the-base utilities 7" 14 3/8" 40" 19 3/8" 177 MM 365 MM 1002MM 488MM 6 5/8'' 167 MM 14 7/16" 365MM 73 5/8" 65" 1868MM 1652MM 8 3/8"...
  • Page 15 Dimensional Data Figure 5. 12.5 to 25 tons standard efficiency – power exhaust 22.7 21.4 Figure 6. 12.5 to 25 tons standard efficiency – unit clearance and roof opening CLEARANCE 36” 914 MM UNIT OUTLINE CLEARANCE 68” 1727 MM CLEARANCE FORM TOP OF UNIT 72”...
  • Page 16 Dimensional Data Figure 7. 12.5 to 25 tons standard efficiency – roof curb 116 7/8” 1” 2969 MM 25 MM 1 13/16” 1” 46 MM 25 MM 1 1/2” (38 MM) PERIMETER 22 1/4” CURB FLANGE 565 MM 23 1/4” 1”...
  • Page 17 Dimensional Data Clearances capacity, and peak operating efficiency. Providing less than the recommended clearances may result in condenser coil Figure 9, p. 17 illustrates the minimum operating and starvation, “short-circuiting” of exhaust and economizer service clearances for either a single or multiple unit airflows, or recirculation of hot condenser air.
  • Page 18 Dimensional Data Figure 10. Corner weights Center of Gravity Length Center of Gravity Width Center of Gravity Table 2. Factory installed options (FIOPS)/accessory net weights (lb) WSJ150-180 WSJ240-300 Accessory 12.5, 15 Tons 20, 25 Tons Barometric Relief Economizer Electric Heaters Hinged Doors Low Leak Economizer - Downflow Low Leak Economizer - Horizontal...
  • Page 19 Dimensional Data Lifting and Rigging Figure 11. Rigging and center of gravity — 12.5 to 25 tons WARNING Heavy Object! Failure to follow instructions below could result in unit dropping which could result in death or serious injury, and equipment or property-only damage. Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted.
  • Page 20 Installation Ductwork WARNING Heavy Object! Supply and return air openings as viewed from the rear of the unit are shown in the following drawings. Failure to follow instructions below could result in unit dropping which could result in death or serious Figure 12.
  • Page 21 Installation Table 3. Clearance required from duct to combustible Note: For sound consideration, cut only the holes in the surfaces roof deck for the ductwork penetrations. Do not cut out the entire roof deck within the curb perimeter. Clearance required from duct to Model Number If a Curb Accessory Kit is not used: combustible surfaces (inches)
  • Page 22 Installation uniform lift. The minimum distance between the lifting • Install and connect a condensate drain line to the hook and the top of the unit should be 7 feet. evaporator drain connection. 5. Test-lift the unit to ensure it is properly rigged and Factory Installed Economizer balanced, make any necessary rigging adjustments.
  • Page 23 For variable frequency drives from horizontal return duct) or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.
  • Page 24 Installation Filter Installation • Connect properly sized and protected power supply wiring to a field-supplied/installed disconnect switch The quantity of filters is determined by unit size. Access to and to the main power terminal block (HTB1) in the unit the filters is obtained by removing the filter access panel. control panel.
  • Page 25 Installation Main Unit Power Notes: • Black gasket is shipped from the factory and is WARNING located in the literature Ship With bag in the Proper Field Wiring and Grounding control box. Apply black gasket around conduit Required! plate on all four sides after installation to prevent air leakage from the building entering Failure to follow code could result in death or serious the electrical enclosures.
  • Page 26 Installation WARNING 1. Use copper conductors unless otherwise specified. 2. Ensure that the AC control wiring between the controls Hazardous Voltage! and the unit’s termination point does not exceed 2.5 Failure to disconnect power before servicing could ohms/conductor for the length of the run result in death or serious injury.
  • Page 27 Installation Figure 20. Low voltage wiring — C cabinet Figure 21. Low voltage wiring — D cabinet PKGP-SVX010A-EN...
  • Page 28 Installation Figure 22. Main control panel low voltage wiring Table 4. Recommended wire lengths Notes: – Resistance in excess of 2.5 ohms per Maximum recommended wire conductor can cause deviations in the Wire Size length from unit controller to accuracy of the controls. sensor –...
  • Page 29 Installation Space Temperature Averaging • Example #2 illustrates three sensors squared in a series/parallel circuit. Using BAYSENS077*, two Space temperature averaging is accomplished by wiring a sensors are required to accomplish space temperature number of remote sensors in a series/parallel circuit. averaging.
  • Page 30 Installation Table 6. Temperature vs. resistance Table 6. Temperature vs. resistance (continued) Temperature Temperature Nominal Resistance Nominal Resistance (kOhms) (kOhms) Degrees °F Degrees °C Degrees °F Degrees °C -28.9 170.1 45° 22.85 -26.1 143.5 50° 10.0 19.96 -23.3 121.4 55° 12.8 17.47 -20.6...
  • Page 31 Pre-Start Use the checklist provided below in conjunction with the Excessive three phase voltage imbalance between phases “General Unit Requirements” checklist to ensure that the will cause motors to overheat and eventually fail. The unit is properly installed and ready for operation. maximum allowable voltage imbalance is 2 percent.
  • Page 32 Pre-Start Compressor Crankcase Heaters WARNING Hazardous Voltage w/Capacitors! Each compressor can be equipped with a crankcase heater (On some units the crankcase heater comes standard). Failure to disconnect power and discharge capacitors The proper operation of the crankcase heater is important before servicing could result in death or serious to maintain an elevated compressor oil temperature during injury.
  • Page 33 Pre-Start appropriate outputs. A user-selected timeout value will configuration, see ACC-APG002*-EN, Symbio 700 for determine how long the controller will remain in any given Precedent Packaged Rooftop Air-Conditioners Application state once initiated. For detailed information on how each Guide. Service Test State is interpreted based on the equipment’s Figure 24.

  • Page 34: Sequence Of Operation

    Unit Start-Up Sequence of Operation Hot Gas Reheat WARNING See ACC-APG002*-EN, Application Guide, Symbio™ 700 Controller with Precedent™ Packaged Rooftop Air- Live Electrical Components! Conditioners. Failure to follow all electrical safety precautions when exposed to live electrical components could result in Return Air Smoke Detector death or serious injury.
  • Page 35 Unit Start-Up WARNING Safety Alert! Failure to follow instructions below could result in death or serious injury. In addition to the following tasks, you MUST: • Follow all instructions in the unit’s Installation, Operation, and Maintenance manual, including warnings, cautions, and notices. •...

  • Page 36: Maintenance

    Maintenance Condensate Overflow Switch WARNING Hazardous Service Procedures! During maintenance, the switch float (black ring) must be checked to ensure free movement up and down. Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or Cooling Season serious injury.

  • Page 37: Coil Cleaning

    Maintenance terminal connections, as well as damaged wire 2. Protect all electrical devices such as motors and insulation. Make any necessary repairs. controllers from any over spray. • Verify that the electric heat system operates properly. 3. Straighten any bent coil fins with a fin comb. 4.

  • Page 38: Annual Maintenance

    Maintenance Hot Gas Reheat Additional Oil 2. When recharging the unit after servicing, replace the amount of oil removed, as measured in step 1. Verify oil NOTICE added is the correct type. Compressor Damage! 3. For compressor replacements and/or additional questions, contact Technical Support.

  • Page 39: Troubleshooting

    Troubleshooting See ACC-APG002*-EN, Application Guide, Symbio™ 700 Controller with Precedent™ Packaged Rooftop Air- Conditioners. PKGP-SVX010A-EN...

  • Page 40: Wiring Diagrams

    Wiring Diagrams Note: Wiring diagrams can be accessed using e-Library by number search field or by contacting technical entering the diagram number in the literature order support. Table 9. Wiring diagrams Drawing Schematic Type Voltage Description Controls Number SCHEMATIC; SHEET 1, POWER, DUAL COMPRESSOR, DUAL Symbio 700 Main Unit 12134334...
  • Page 41 Wiring Diagrams Table 9. Wiring diagrams (continued) Drawing Schematic Type Voltage Description Controls Number Symbio 700 LABEL; FUSE TABLE Main Unit X39004322 Component Location Symbio 700 12134449 DIAGRAM; COMPONENT LOCATION, COOLING/ELECTRIC, B CABINET Component Location Symbio 700 DIAGRAM; COMPONENT LOCATION, GAS, B CABINET 12134450 Component Location Symbio 700...

  • Page 42: Piping Diagrams

    Piping Diagrams PKGP-SVX010A-EN...
  • Page 43 Piping Diagrams PKGP-SVX010A-EN...
  • Page 44 Piping Diagrams PKGP-SVX010A-EN...
  • Page 45 Piping Diagrams PKGP-SVX010A-EN...

  • Page 46: Limited Warranty

    WSJ Precedent Models MERCHANTABILITY AND FITNESS FOR PARTICULAR USE, AND IN NO EVENT SHALL WARRANTOR BE This warranty is extended by Trane to the original LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL purchaser and to any succeeding owner of the real DAMAGES.
  • Page 47 Notes PKGP-SVX010A-EN...
  • Page 48 For more information, please visit trane.com or americanstandardair.com. Trane and American Standard have a policy of continuous product and product data improvement and reserve the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

This manual is also suitable for:

Precedent wsj300aPrecedent wsj150Precedent wsj180Precedent wsj240Precedent wsj300

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