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Trane Precedent YSJ072 Installation, Operation And Maintenance Manual

Packaged rooftop air conditioners cooling and gas/ electric
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Installation, Operation, and Maintenance
Packaged Rooftop Air
Conditioners
Precedent™ Cooling and Gas/
Electric
Standard Efficiency
6 to 25 Tons – 60 Hz
Model Numbers: YSJ072* - YSJ300*
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.
August 2023
SAFETY WARNING
RT-SVX071D-EN

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  • Page 1 Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent™ Cooling and Gas/ Electric Standard Efficiency 6 to 25 Tons – 60 Hz Model Numbers: YSJ072* - YSJ300* 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 Smoke Detector Sensor (Optional) ..11 Phase Monitor .

  • Page 5: Table Of Contents

    Table of Contents Main Unit Power ......43 Monthly Maintenance ..... 57 Standard Wiring .
  • Page 6 Model Number Description Digit 1 — Unit Function Digit 18 — Through-the-Base Provisions Digit 12, 13 — Service Sequence Y = DX Cooling, Gas Heat ** = Factory Assigned 0 = No Through-the-Base Provisions A = Through-the-Base Electric B = Through-the-Base Gas Piping Digit 2 —...
  • 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 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 Clogged Filter Switch (Optional) The unit mounted clogged filter switch monitors the The nameplate for the compressors are located on the side pressure differential across the return air filters. It is of the compressor. mounted in the filter section and is connected to the Fresh Air Options Module.
  • Page 10 This sensor features single setpoint capability and timed will not be allowed to restart for a minimum of 3 minutes. override with override cancellation. It is used with a Trane Integrated Comfort™ building management system. If four consecutive open conditions occur during an active...
  • 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 Precautionary Measures WARNING Fiberglass Wool! • Avoid breathing fiberglass dust. Exposure to glass wool fibers without all necessary • Use a NIOSH approved dust/mist respirator. PPE equipment could result in cancer, respiratory, • Avoid contact with the skin or eyes. Wear long-sleeved, skin or eye irritation, which could result in death or loose-fitting clothing, gloves, and eye protection.
  • Page 13 Dimensions and Weights Dimensional Data Figure 2. 6 to 10 tons standard efficiency TOP PANEL CONTROL PANEL ACCESS CONDENSER FAN EVAPORATOR SECTION ACCESS PANEL 50-7/8" [1293] ALTERNATE CONDENSATE CONNECTION 3/4 - 14 NPT DIA. HOLE 27-5/8" [700] 47-7/8" [1217] UNIT CONTROL WIRE 88-1/8"...
  • Page 14 Dimensions and Weights Figure 4. 6 to 10 tons standard efficiency – horizontal airflow supply/return 3-7/4" [97] 9-3/8" [237] 16-3/4" 32-1/4" [426] [820] 19-1/4" [490] 32-1/4" [820] 27-5/8" [700] 3/4 -14 NPT DIA. HOLE CONDENSATE DRAIN 4-1/4" [109] Figure 5. 6 to 10 tons standard efficiency — unit clearance and roof opening CLEARANCE HORIZONTAL FLOW - 18”...
  • Page 15 Dimensions and Weights Figure 6. 6 to 10 tons standard efficiency – roof curb 46 3/8” 18 1/4” 1178 MM 1” 470 MM 34 3/8” 25 MM 6 5/8” 873 MM 168 MM 80 1/2” 18 1/2” 14” 2045 MM 470 MM 355 MM 1”...
  • Page 16 Dimensions and Weights Figure 8. 6 to 10 tons standard efficiency – swing diameter for hinged door(s) option 17” 432 MM 21 3/8” 543 MM Applicable to Y_C models only 34 5/8” 879 MM Figure 9. 6 to 25 tons standard efficiency— gas pipe height Note: Height of gas pipe required from inside unit base to gas shut off assembly (factory provided).
  • Page 17 Dimensions and Weights Figure 10. 12.5 tons standard efficiency INDOOR TOP PANEL CONTROL BOX SECTION ACCESS PANEL OUTDOOR TOP PANEL EVAPORATOR SECTION 50-7/8" ACCESS PANEL [1293] ALTERNATE CONDENSATE DRAIN CONNECTION 3/4 - 14 NPT DIA HOLE 27-5/8" CONDENSER COIL [700] 47-7/8"...
  • Page 18 Dimensions and Weights Figure 12. 12.5 tons standard efficiency – horizontal airflow, supply and return 3 7/8” 98 MM 9 3/8” 238 MM RETURN 32 1/4” 832 MM 16 3/4” 425 MM SUPPLY 19 1/4” 489 MM 32 1/4” 4 3/4” 832 MM 120 MM 27 5/8”...
  • Page 19 Dimensions and Weights Figure 14. 12.5 tons standard efficiency – roof curb 18 1/2” 6 5/8” 470 MM 168 MM 56 3/8” 1” 34 3/8” 1432 MM 25 MM 873 MM 83 7/8” 80 1/2” 18 1/2” 2045 MM 2130 MM 470 MM 1”...
  • Page 20 Dimensions and Weights Figure 16. 6 to 12.5 tons standard efficiency – economizer, manual or motorized fresh air damper ECONOMIZER HOOD BAROMETRIC RELIEF HOOD 7-3/4" [198] 7-1/4" 16-3/4" [185] [424] 12" [303] DIMENSIONS EXTENDS TO 21-5/8" (549MM) WHEN POWERED EXHAUST IS COUPLED WITH LOW LEAK ECONOMIZER RT-SVX071D-EN...
  • Page 21 Dimensions and Weights Figure 17. 6 to 12.5 tons standard efficiency – power exhaust ECONOMIZER HOOD 5-5/8" [144] 20-1/2" [520] RT-SVX071D-EN...
  • Page 22 Dimensions and Weights Figure 18. 15 to 25 tons standard efficiency – power exhaust 22.7 21.4 Figure 19. 15 to 25 tons standard efficiency GAS CONNECTION 3/4 NPT (250, 320, 400 MBh) INDOOR TOP PANEL CONTROL BOX SECTION ACCESS PANEL 2"...
  • Page 23 Dimensions and Weights Figure 20. 15 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 24 Dimensions and Weights Figure 22. 15 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” MM (1829 MM) ROOF 76 1/2” OPENING 1943 MM CLEARANCE 48”...
  • Page 25 Dimensions and Weights Figure 24. 15 to 25 ton standard efficiency – swing diameter for hinged door(s) option 30" 32" 754MM 809MM 36" 907MM RT-SVX071D-EN...
  • Page 26 Dimensions and Weights Clearances capacity, and peak operating efficiency. Providing less than the recommended clearances may result in condenser coil Figure 25, p. 26 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 27 Dimensions and Weights Figure 26. Corner weights Center of Gravity Length Center of Gravity Width Center of Gravity Table 2. Factory installed options (FIOPS)/accessory net weights (lb) YSJ072-120 YSJ150 YSJ180-300 Accessory 6, 7.5, 8.5, 10 Tons 15, 17.5, 20, 25 Tons 12.5 Tons Barometric Relief Economizer...
  • Page 28 Dimensions and Weights Lifting and Rigging Figure 28. Rigging and center of gravity — 15 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 29 Installation Horizontal Units Figure 30. 12.5 tons standard efficiency – horizontal airflow, supply and return If the unit is installed at ground level, elevate it above the snow line. Provide concrete footings at each support 3 7/8” location with a full perimeter support structure or a slab 98 MM foundation for support.
  • Page 30 Installation Roof Curb Figure 32. 6 to 10 tons standard efficiency – downflow airflow supply/return, through-the-base Downflow utilities 3 5/8” 92 MM The roof curbs for these units consists of a full perimeter 17 1/2” 9 7/8” 17 1/2” 444 MM 251 MM 444 MM 4”...
  • Page 31 Installation Figure 35. View for base to roof curb alignment on 1. Confirm unit does not need additional moves by fork lift. C.0 cabinet on a 50-in. x 84-in. oof curb 2. Prepare unit for rigging as follows: • 6 to 12.5 ton units: remove all drill screws fastening wood protection to metal base rail.
  • Page 32 Installation Figure 38. Fork pockets — 12.5 ton standard ☐ Check the unit for shipping damage and material efficiency units shortage. File a freight claim and notify appropriate sales representative. ☐ Verify correct model, options, and voltage from unit nameplate. ☐...
  • Page 33 Installation Figure 40. Discard cover plate Figure 42. Vent hood installation Temperature Limit Switch Usage Units are factory shipped in the downflow discharge configuration but can be field converted to a horizontal discharge configuration. Some, but not all units require a different TCO1 limit switch, attached to the combustion blower motor (6 to 12.5 tons) or to the installed TCO1 limit switch (15 to 25 tons) if a horizontal discharge configuration...
  • Page 34 Installation Table 3. TC01 tripping values – two- stage gas opening (insulation side down). (continued) 3. Using self-drilling screws, (or screws removed from duct cover), screw through dimples to attach DUCT Unit Model TCO1 Tripping Values - Tons Number Downflow/Horizontal COVER to base.
  • Page 35 Installation Figure 45. Supply and return opening Figure 47. DAS tubing detail view (downflow) Vertical slide bracket covers holes in tubing Supply duct cover Insulation side down Return duct Insulation side up cover 6. After completing installation of the duct covers for horizontal discharge, proceed to TCO-1 instructions 1.
  • Page 36 Installation Figure 49. DAS tubing after conversion to horizontal Figure 51. DAS tubing factory installation for downflow Vertical slide bracket - new position 90 degree elbow installation location Pickup tube - new poisition Figure 50. DAS tubing after conversion to horizontal - detail Vertical hole(s) available for horizontal...
  • Page 37 Installation Figure 53. Detail view of DAS tubing after converting If the unit being installed has a different TCO1 value than to horizontal listed in , the limit control TCO1 must be replaced with the extra limit control shipped in the heater compartment. Replace TCO1 following the instructions in steps 1 through 3 below.
  • Page 38 Installation Figure 55. Downflow bracket installation (view from viewed from outside unit facing horizontal supply). horizontal return duct) Figure 57, p. Figure 57. Horizontal bracket installation (view from horizontal return duct) 3. Lift the tube and bracket from the downflow duct opening.
  • Page 39 For variable frequency drives or other energy storing components provided by Dimension A (inch) Model Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods YSJ(072-150)***(0,A) (L, M, H) 4 5/8 for discharge of capacitors. Verify with a CAT III or IV...
  • Page 40 Installation Figure 61. Through-the-base gas pipe assembly for Figure 62. Through-the-base gas pipe assemblies for YSJ(180-300)* YSJ(072-150)* See Detail A Component Description Grommet Grommet Pipe Fitting (3/4-in. x 8 1/2-in.) 90° Elbow Support Plate Pipe Fitting (3/4-in. x 4-in.) 1/2-in. and 3/4-in., Gas Pipe Connection Table 6.
  • Page 41 Installation Requirements of Gas Heat Note: Number of holes will vary. Verify bracket is covering all holes in the vertical tube, regardless The unit gas train and optional through-the-base gas shut- of quantity. off valve are rated at 0.50 PSIG maximum. A pressure 2.
  • Page 42 Installation Figure 65. Condensate trap installation The 6 to 12.5 tons condensate drain pan is convertible. Refer to the ductwork section drawings in the Installation Drain Pan Type Connection chapter. It can be converted to drain condensate from the CABINET STAINLESS front side of the unit or through the base.

  • Page 43: Main Unit Power

    Installation Field Installed Power Wiring WARNING Hazardous Voltage! WARNING Failure to disconnect power before servicing could Proper Field Wiring and Grounding result in death or serious injury. Required! Disconnect all electric power, including remote Failure to follow code could result in death or serious disconnects before servicing.

  • Page 44: Field-Installed Control Wiring

    Installation Field-Installed Control Wiring WARNING Hazardous Voltage! WARNING Failure to disconnect power before servicing could Hazardous Voltage! result in death or serious injury. Failure to disconnect power before servicing could Disconnect all electric power, including remote result in death or serious injury. disconnects before servicing.
  • Page 45 Installation Figure 66. Low voltage wiring — B cabinet Figure 67. Low voltage wiring — C cabinet RT-SVX071D-EN...

  • Page 46: Controls Using Dc Analog Input/Outputs

    Installation Figure 68. Low voltage wiring — D cabinet Figure 69. Main control panel low voltage wiring Controls using DC Analog Input/Outputs Table 9. Recommended wire lengths (Standard Low Voltage Multi conductor Maximum recommended wire Wire) Wire Size length from unit controller to sensor Before installing any connecting wiring between the unit Meters...

  • Page 47: Dc Conductors

    Installation Notes: Table 10. Zone sensor module wiring (continued) – Resistance in excess of 2.5 ohms per Distance from Unit to Control Recommended Wire Size conductor can cause deviations in the 14 gauge 611 - 970 feet accuracy of the controls. –...
  • Page 48 Installation Figure 70. Examples Note: Wiring pin numbers are for reference only. There are Table 11. Temperature vs. resistance (continued) multiple smoke detector systems that could have Temperature differently numbered pins. For correct wiring details, Nominal Resistance refer to the specific smoke detector, ship-with (kOhms) Degrees °F Degrees °C...
  • Page 49 Installation Table 11. Temperature vs. resistance (continued) Table 13. Iron pipe size (SI) millimeters Temperature Iron Pipe Size (SI) Millimeters Nominal Resistance (kOhms) Degrees °F Degrees °C Length of 15 mm 20 mm 25 mm 32 mm 40 mm Pipe Pipe Pipe Pipe...

  • Page 50: Pre-Start

    Pre-Start Use the checklist provided below in conjunction with the Excessive three phase voltage imbalance between General Unit Requirements checklist to confirm the unit is phases will cause motors to overheat and eventually properly installed and ready for operation. fail. The maximum allowable voltage imbalance is 2 percent.

  • Page 51: Compressor Crankcase Heaters

    Pre-Start WARNING switch or circuit protection switch and remove the phase sequence indicator. Hazardous Voltage w/Capacitors! Failure to disconnect power and discharge capacitors Compressor Crankcase Heaters before servicing could result in death or serious injury. • Each compressor can be equipped with a crankcase Disconnect all electric power, including remote heater (Some units include crankcase heater as disconnects and discharge all motor start/run...
  • Page 52 Pre-Start troubleshooting. The user can initiate Service Test Mode determine how long the controller will remain in any given through the controller user interfaces, including the Symbio state once initiated. For detailed information on how each Service and Installation mobile application. Service Test State is interpreted based on the equipment configuration, see ACC-APG002*-EN, Symbio™...

  • Page 53: Unit Start-Up

    Unit Start-Up Sequence of Operation Table 14. Ignition module diagnostics (continued) See ACC-APG002*-EN, Application Guide, Symbio™ 700 System Lockout: Failed to detect or sustain flame. (failure to ignite, no Controller with Precedent™ Packaged Rooftop Air- 2 Flashes spark, low/no gas pressure, etc.) Conditioners.

  • Page 54: Ignition And Operational Failures

    Unit Start-Up a. < 1.5 Vdc (0% ModBus Firing Rate)]: OFF [A A 0 0 1 1 ], the controller enters an inter-purge period of 30 seconds [r r E E t t ] and then will initiate another ignition trial. b.

  • Page 55: Return Air Smoke Detector

    Unit Start-Up Display Code Code Type Description Additional Comments and Notes A A 0 0 3 3 Alert Insufficient Combustion Air Blocked vent with actuator position derated by >20% from FRI setting A A 0 0 4 4 Alert Limited Low Fire (due to Lost Flame Auto-Adaptation) Flame loss at low fire results in an auto-adjustment that limits the burner turn down during the rest of the current call for heat.

  • Page 56: Hot Gas Reheat

    Unit Start-Up 2. After the compressor and condenser fan have started 2. Follow the Test Guide in Figure 72, p. 52 to start the and operated for approximately 30 minutes, observe unit in the heating mode. the operating pressures. Compare the operating 3.

  • Page 57: Maintenance

    Maintenance Condensate Overflow Switch WARNING Hazardous Service Procedures! During maintenance, the switch float (black ring) must be checked to confirm 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 58: Coil Cleaning

    Maintenance Microchannel (MCHE) Coils terminal connections, as well as damaged wire insulation. Make any necessary repairs. NOTICE • Verify the electric heat system operates properly. Coil Damage! Coil Cleaning Failure to follow instructions below could result in coil damage. Regular coil maintenance, including annual cleaning, DO NOT use any detergents with microchannel enhances the unit’s operating efficiency by minimizing the condenser coils.

  • Page 59: Annual Maintenance

    Maintenance Final Process 3. For compressor replacements and/or additional questions, contact Technical Support. For future reference, record the unit data below in the blanks provided. Annual Maintenance Clean and repaint any corroded surface. Table 15. Unit data log Complete Unit Model Number Unit Serial Number Wiring Diagram Numbers (from unit control panel)

  • Page 60: Troubleshooting

    Troubleshooting Refer to the Application Guide Symbio™ 700 Controller with Precedent™ Packaged Rooftop Air-Conditioners (ACC-APG002*-EN). RT-SVX071D-EN...

  • Page 61: 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 17. Wiring diagrams Drawing Schematic Type Voltage Description Controls Number SCHEMATIC; SHEET 1, POWER, DUAL COMPRESSOR, SINGLE Symbio 700 Main Unit 12134333...
  • Page 62 Wiring Diagrams Table 17. Wiring diagrams (continued) Drawing Schematic Type Voltage Description Controls Number Symbio 700 SCHEMATIC; SHEET 8, CONTROLS,STEPPER MOTOR CONTROLLER Main Unit 12134447 Symbio 700 Main Unit 12134448 SCHEMATIC; SHEET 9, CONTROLS, XM30/XM32 EXPANSION MODULES Symbio 700 LABEL; FUSE TABLE Main Unit X39004322 Component Location...
  • Page 63 Wiring Diagrams Table 17. Wiring diagrams (continued) Drawing Schematic Type Voltage Description Controls Number SCHEMATIC; SHEET 2, POWER, SINGLE INDOOR FAN, MOD GAS HEAT, Symbio 700 Power 230V 12134731 230V, HIGH SCCR SCHEMATIC; SHEET 2, POWER, SINGLE INDOOR FAN, MOD GAS HEAT, Symbio 700 Power 460V/575V...

  • Page 64: Piping Diagrams

    Piping Diagrams RT-SVX071D-EN...
  • Page 65 Piping Diagrams RT-SVX071D-EN...
  • Page 66 Piping Diagrams RT-SVX071D-EN...
  • Page 67 Piping Diagrams RT-SVX071D-EN...

  • Page 68: Gas Heat Operation And Maintenance

    Gas Heat Operation and Maintenance Gas Heat Unit General WARNING Information Safety Hazards! Failure to follow instructions below could result in WARNING death or serious injury. Hazard of Explosion or Fire! • Never perform any maintenance procedures until Failure to follow instructions could result in death or the electrical power to the unit is turned off.

  • Page 69: Air Filters

    Gas Heat Operation and Maintenance Note: Single zone VAV is designed to be used with a zone Table 18. Recommended standard filters (continued) sensor. If a unit is configured for Single zone VAV Filter Size Unit Model Tons operation but is connected to a thermostat, the (L x W x D) Number control will revert to multi-speed (2-speed) indoor...

  • Page 70: Heating System Shutdown

    Do not try to light any appliance. or other energy storing components provided by • Do not touch any electrical switch. Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods • Do not use any phone in your building.

  • Page 71: Turning Off Gas To Unit

    Hazard of Explosion or Fire! equipment damage. Failure to follow instructions could result in death or Drain and vent coils when not in use. Trane serious injury and equipment or property damage. recommends glycol protection in all possible freezing Do not store or use gasoline or other flammable applications.

  • Page 72: Condensate Overflow Sensor

    Gas Heat Operation and Maintenance Condensate Overflow Sensor (Optional) If installed, the condensate overflow switch will shut down the unit before a drain pan overflow occurs. RT-SVX071D-EN...

  • Page 73: Limited Warranty

    This warranty is extended by Trane to the original be defective. purchaser and to any succeeding owner of the real...
  • Page 74 Notes RT-SVX071D-EN...
  • Page 75 Notes RT-SVX071D-EN...
  • Page 76 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.

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Precedent ysj300

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