Trane SEHJ090-162 Installation, Operation And Maintenance Manual
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Trane SEHJ090-162 Installation, Operation And Maintenance Manual

Commercial single-zone rooftop air conditioners with cv, vav, szvav, or rr controls
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Installation, Operation,
and Maintenance
IntelliPak™ II
Commercial Single-Zone Rooftop Air Conditioners
with CV, VAV, SZVAV, or RR Controls
"F0" and later design sequence
SEHJ090-162
SFHJ090-162
SLHJ090-162
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 2013
SSHJ090-162
SXHJ090-162
SAFETY WARNING
RT-SVX24J-EN

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Summary of Contents for Trane SEHJ090-162

  • Page 1 Installation, Operation, and Maintenance IntelliPak™ II Commercial Single-Zone Rooftop Air Conditioners with CV, VAV, SZVAV, or RR Controls “F0” and later design sequence SEHJ090-162 SSHJ090-162 SFHJ090-162 SXHJ090-162 SLHJ090-162 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: Important Environmental Concerns

    Responsible Refrigerant Practices! These units are equipped with electronic Unit Control Trane believes that responsible refrigerant practices are Modules (UCM). Refer to the “Startup” and “Test Mode” important to the environment, our customers, and the air procedures within this Installation, Operation, and conditioning industry.

  • Page 3: Overview Of Manual

    Warnings, Cautions and Notices Note: The procedures discussed in this manual should only be performed by qualified and experienced HVAC technicians. Overview of Manual This booklet describes proper installation, startup, operation, and maintenance procedures for 90 to 162 ton rooftop air conditioners designed for CV, RR, VAV, or SZ VAV applications.

  • Page 4: Table Of Contents

    Table of Contents Overview of Manual ....3 Requirements for Electric Heat Units ..63 Requirement for Gas Heat ... . .63 Model Number Descriptions .
  • Page 5 Table of Contents unit) (in addition to Two-piece unit rigging Compressor Startup ....159 and placement) ..... 93 Compressor Operational Sounds .

  • Page 6: Model Number Descriptions

    Model Number Descriptions S X H J 4 0 A 1 2 3 4 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 DIGIT 1 —...
  • Page 7 Model Number Descriptions DIGIT 18 — EXHAUST/RETURN DIGIT 22 — DAMPER OPTION DIGIT 28 — EVAPORATOR COIL FAN MOTOR SELECTION AND DRAIN PAN Standard Low Leak Standard Evap Coil w/Galvanized None Ultra Low Leak 7.5 Hp Drain Pan 10 Hp Standard Evap Coil w/ Stainless DIGIT 23—...
  • Page 8 Model Number Descriptions DIGIT 34 — MODULE OPTIONS Tip: EXAMPLE Model number None SXHJ10540AA715MFDE81 0-5 volt Generic Building D1100A1BA1000AA1A1 Automation System (GBAS) describes a unit with the following 0-10 volt GBAS characteristics: 0-5 volt GBAS and 0-10 volt GBAS LonTalk® Communication DX Cooling, No Heat, Extended Interface (LCI) Casing, 105Ton nominal capacity,...

  • Page 9: Unit Inspection

    “Unit Startup, ” p. [ ] Verify that the power supply complies with the unit Trane will not assume any responsibility for equipment nameplate specifications. damage resulting from condensate accumulation on the [ ] Verify that the power supply complies with the unit electrical and/or mechanical components.

  • Page 10: General Information

    HGRH = Hot gas reheat the roof curb installation manual. • HI = Human Interface Trane Commercial Rooftop Units are controlled by a • HVAC = Heating, ventilation and air conditioning microelectronic control system that consists of a network •...
  • Page 11 16130 Auto Module (LCI/BCI - Optional - used on units 19480 Auto Heat with Trane ICS™ or 3rd party Building 27930 Heat Automation Systems) Rooftop Module (RTM - Standard on all units) The LonTalk/BACnet Communication Interface modules expand communications from the unit UCM network to a The rooftop Module (RTM) responds to cooling, heating, TraneTracer Summit™...
  • Page 12 General Information space pressure to within the setpoint control band. Refer Modulating Dehumidification Module MDM Figure 1 for the Humidity vs. Voltage input values. (Optional - used with Dehumidification Control) Figure 1. Humidity vs. current The MDM supports specific control inputs and outputs for Modulating Dehumidification control including modulating Reheat and Cooling valve control as well as the Reheat Pumpout Coil Relay output.The Modulating...

  • Page 13: Constant Volume (Cv) And Variable Air Volume (Vav) Units

    The Generic Building Automation System (GBAS) module necessary to prevent icing. After the last compressor stage allows a non-Trane building control system to has been turned “Off” , the compressors will be allowed to communicate with the rooftop unit and accepts external restart once the evaporator temperature rises 10°F above...
  • Page 14 General Information Leaving Recovery Exhaust Temp Sensor power supply to the motors if the current exceeds the breaker's “must trip” value.The rooftop module (RTM) Analog input device used on CV andVAV applications with will shut all system functions “Off” when an open fan Energy Recovery option installed.
  • Page 15 General Information For evaporative condensing units, head pressure is allowed to operate if the temperature of the outside air monitored with pressure transducers attached to the falls below the lockout setpoint. When the temperature saturated condensing line and converted to a temperature rises 5°F above the lockout setpoint, the compressors are by the MPM.This temperature is used to control the allowed to operate.The factory preset is 50°F .

  • Page 16: Constant Volume (Cv) Units

    General Information Figure 5. Transducer voltage output vs. pressure input for supply, return and building pressure -0.75 to 9.0 Iwc Pressure Transducer Voltage Output vs. Pressure Input 4.50 4.00 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0.00 Pressure (inches w.c.) Supply Air Temperature Low Limit Compressor Circuit Breakers Uses the supply air temperature sensor input to modulate...

  • Page 17: Variable Air Volume (Vav) Units

    General Information Supply Air Tempering will be at full airflow and the VAV boxes in the space will need to be 100% open as signaled by the VAV box/unocc On CV units equipped with staged gas heat, if the supply relay.

  • Page 18: Unit Control Modules

    General Information Figure 7. Unit component layout and “ship with” locations Outside Air Dampers Condenser Fans Return/ Heating Exhaust Supply Fan Section Compressor Section Variable Variable Frquency Frquency Outside Air Drive (VFD) Drive (VFD) Dampers Outside Air Flue Vent Hot Water/Steam Static Kit and Access Hydronic Connection...

  • Page 19: Single Zone Variable Air Volume (Szvav)

    General Information Figure 9. Control module locations Single Zone Variable Air Volume at 0VDC, the fan speed output is 37% (22Hz) from the VFD by default; and at 10VDC the fan speed output is 100% (SZVAV) Only (60Hz).The control scales the 0-10VDC VFD output from the RTM linearly to control between the 37-100% range.
  • Page 20 General Information prevent over/under pressurization.The overall scheme Occupied Heating Operation will remain very similar to VAV units with Space Pressure Occupied heating operation has two separate control Control with the exception of the dynamic Exhaust Enable sequences; staged and modulated. All staged heating Setpoint.

  • Page 21: Unit Clearances

    Unit Clearances Figure 10. Minimum required clearance AH R Cond R Blank Section Fltr Outside Condenser Fltr Option Option As Req. Final Filters Ctrl Box Filter (L&R) Exhaust Heat CBox Outside Condenser Rtn/Exh Rtn/Exh Heat Fltr (L&R Fltr As Req. As Req.
  • Page 22 Unit Clearances Figure 11. Multiple unit placement Minimum distance between units must be 16’! Exhaust Exhaust Exhaust Notes: 1. Stagger units to minimize span deflection which deters sound transmission and to maximize proper diffusion of the exhaust air before it reaches the adjacent unit outside air intake. 2.

  • Page 23: Dimensional Data

    Dimensional Data Figure 12. Unit Top/Front View Detail A 1-1/4 NPT. DRAIN 2X TYP. LEFT & RIGHT SIDES OF UNIT RT-SVX24J-EN...
  • Page 24 Dimensional Data Table 5. Unit dimensions (in.)—one-piece unit air-cooled ONE-PIECE Dimensions without Energy Recovery Wheel (ERW) Lifting Lug Locations Condenser Unit Dimensions Air Handler Side Side Unit Width Blank Tonnage Section None 437 3/16 159 15/16 252 14/16 27 11/16 139 13/16 143 8/16 4 ft...
  • Page 25 Dimensional Data Table 6. Unit dimensions (In.)—two-piece unit air-cooled TWO-PIECE Dimensions without Energy Recovery Wheel (ERW) Lifting Lug Locations Unit Dimensions Air Handler Side Blank Tonnage Section None 454 4/16 159 15/16 330 14/16 121 6/16 252 14/16 4 ft 502 7/16 159 15/16 379 1/16...
  • Page 26 Dimensional Data Table 6. Unit dimensions (In.)—two-piece unit air-cooled (continued) Return Fan Exhaust Fan Blank Tonnage Section None 29 3/16 4 ft 29 3/16 8 ft 29 3/16 None 29 3/16 4 ft 29 3/16 8 ft 29 3/16 120-150 (All Units Except High None...
  • Page 27 Dimensional Data Table 6. Unit dimensions (In.)—two-piece unit air-cooled (continued) Lug Locations Condenser Side Unit Width Unit Height Blank Tonnage Section None 112 7/16 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 4 ft 112 7/16 139 13/16 143 8/16 103 12/16 97 9/16...
  • Page 28 Dimensional Data Table 7. Unit dimensions (in.)—two-piece unit evaporative condenser TWO-PIECE Dimensions without Energy Recovery Wheel (ERW) Lifting Lug Locations Unit Dimensions Air Handler Side Blank Tonnage Section 100-118 None 475 8/16 159 15/16 330 14/16 142 10/16 252 14/16 100-118 4 ft 523 12/16...
  • Page 29 Dimensional Data Table 7. Unit dimensions (in.)—two-piece unit evaporative condenser (continued) Return Fan Exhaust Fan Blank Tonnage Section 100-118 None 29 3/16 100-118 4 ft 29 3/16 100-118 8 ft 29 3/16 128-162 (All Units Except High None 29 3/16 Heat Gas Models) 128-162...
  • Page 30 Dimensional Data Table 7. Unit dimensions (in.)—two-piece unit evaporative condenser (continued) Lug Locations Condenser Side Unit Width Unit Height Blank Tonnage Section 100-118 None 133 11/16 139 13/16 143 8/16 103 12/16 97 9/16 102 12/16 100-118 4 ft 133 11/16 139 13/16 143 8/16 103 12/16...
  • Page 31 Dimensional Data Table 8. Unit dimensions (in.)—three-piece unit air-cooled THREE-PIECE Dimensions without Energy Recovery Wheel (ERW) Lifting Lug Locations Unit Dimensions Air Handler Side Blank Tonnage Section None 473 9/16 179 3/16 350 3/16 144 15/16 205 3/16 121 6/16 11 14/16 4 ft 521 12/16...
  • Page 32 Dimensional Data Table 8. Unit dimensions (in.)—three-piece unit air-cooled (continued) Unit Height Return Fan Exhaust Fan Blank Tonnage Section None 103 12/16 97 9/16 103 7/16 29 3/16 4 ft 103 12/16 97 9/16 103 7/16 29 3/16 8 ft 103 12/16 97 9/16 103 7/16...
  • Page 33 Dimensional Data Table 8. Unit dimensions (in.)—three-piece unit air-cooled (continued) Lug Locations Air Handler Side Condenser Side Unit Width Blank Tonnage Section None 234 13/16 247 13/16 368 7/16 436 2/16 112 7/16 139 13/16 143 8/16 4 ft 234 13/16 247 13/16 368 7/16 484 5/16...
  • Page 34 Dimensional Data Table 9. Unit dimensions (in.)—three-piece unit evaporative condenser THREE-PIECE Dimensions without Energy Recovery Wheel (ERW) Lifting Lug Location Unit Dimensions Air Handler Side Blank Tonnage Section 100/118 None 494 13/16 179 3/16 350 3/16 144 15/16 205 3/16 142 10/16 11 14/16 100/118...
  • Page 35 Dimensional Data Table 9. Unit dimensions (in.)—three-piece unit evaporative condenser (continued) Exhaust Unit Height Return Fan Blank Tonnage Section 100/118 None 103 12/16 97 9/16 102 12/16 29 3/16 100/118 4 ft 103 12/16 97 9/16 102 12/16 29 3/16 100/118 8 ft 103 12/16...
  • Page 36 Dimensional Data Table 9. Unit dimensions (in.)—three-piece unit evaporative condenser (continued) Lifting Lug Locations Air Handler Side Condenser Side Unit Width Blank Tonnage Section 100/118 None 234 13/16 247 13/16 368 7/16 436 2/16 133 11/16 139 13/16 143 8/16 100/118 4 ft 234 13/16...
  • Page 37 Dimensional Data Table 10. Downflow/horizontal airflow configuration dimensions (in.) air cooled (AC) and evap condenser (EC) without energy recovery wheel (ERW) (continued) DOWNFLOW Opening Dimensions Supply Opening (One or (Three- Blank Two-Piece Piece Tonnage Section Heat Models) Models) 90-105/100-118 None None 256 1/16 275 6/16...
  • Page 38 Dimensional Data Table 11. Downflow/horizontal airflow configuration dimensions (in.) air-cooled (AC) and evap condenser (EC) with energy recovery wheel DOWNFLOW Opening Dimensions Return Opening—with or without Exhaust Fan Return Opening—with Return Fan Blank Tonnage Section Heat 90-105/100-118 None None 82 3/16 8 14/16 49 10/16 121 15/16...
  • Page 39 Dimensional Data Table 11. Downflow/horizontal airflow configuration dimensions (in.) air-cooled (AC) and evap condenser (EC) with energy recovery wheel (continued) Supply Opening X4 (One or (Three- Blank Two-Piece Piece Tonnage Section Heat Models) Models) 90-105/100-118 None None 351 3/16 370 7/16 10 10/16 54 12/16 84 15/16...
  • Page 40 Dimensional Data Figure 13. Evaporative condenser water connection locations RIGHT SIDE VIEW RT-SVX24J-EN...
  • Page 41 Dimensional Data Figure 14. Electrical entry details (in.) 60 3 Bottom View 53 11 81 1 51 5 71 1 61 3 Outside edge of base rail External customer Ø1 connection points Ø1 1 Marine lights Ø customer supplied Ø3 power service Unit power entrance...

  • Page 42: Weights

    2. Weights shown represent approximate operating weights and have a + 5% accuracy. To calculate weight for a specific unit configuration, utilize TOPSS or contact the local Trane sales representative. ACTUAL WEIGHTS ARE STAMPED ON THE UNIT NAMEPLATE. Table 13.
  • Page 43 Weights Table 13. Component weights (lbs) (continued) 90/100 105/118 120/128 130/140 150/162 Size Weight Size Weight Size Weight Size Weight Size Weight Exhaust VFD (60-100 hp) Exhaust Fan Motor - 7.5 hp Exhaust Fan Motor - 10 hp Exhaust Fan Motor - 15 hp Exhaust Fan Motor - 20 hp Exhaust Fan Motor - 25 hp Exhaust Fan Motor - 30 hp...
  • Page 44 Weights Table 13. Component weights (lbs) (continued) 90/100 105/118 120/128 130/140 150/162 Size Weight Size Weight Size Weight Size Weight Size Weight Cabinet Cabinet 8097 8315 9473 9473 9473 Cabinet - 4' Blank Section Cabinet - 8' Blank Section 1709 1709 1682 1682...

  • Page 45: Installation

    Figure 15. Solid flow baffle wall installation for non- section. Trane roof curbs Before installing any roof curb, verify; Return Fan 1. That it is the correct curb for the unit, 2.
  • Page 46 Installation Figure 16. Pitch pocket location Roof Curb Pitch Pocket Roof Curb Pitch Pocket Table 15. Pitch pocket dimensions (in.) Two/Three- One-Piece Piece One, Two, or Three-Piece Tonnages 113.8 129.9±1 68.875 73.875 78.875 131.8 147.9±1 68.875 73.875 78.875 120,130,150 140.8 156.9±1 68.875 73.875...

  • Page 47: Field Converting Horizontal Ductwork (Supply Or Return) From Right To The Left Side

    Installation Field Converting Horizontal Ductwork (Supply or Return) from Right to the Left Side To field convert horizontal ductwork from right side to the left, follow this procedure: 1. Remove Panel 2 from end of unit 2. Remove the Door and Door header from the left side. 3.
  • Page 48 Installation Figure 18. Ductwork conversion RT-SVX24J-EN...

  • Page 49: Unit Rigging And Placement

    Installation Unit Rigging and Placement Figure 19. Curb cross section WARNING Heavy Objects! Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit.
  • Page 50 Installation Figure 21. Typical unit rigging—one piece unit with four lifting lugs per side 20 ft min 15 ft min Turnbuckle or Chain Adjustment for each lug Figure 22. Typical unit rigging—two-piece unit with two lifting lugs per side Turnbuckle or Chain Adjustment for each lug RT-SVX24J-EN...
  • Page 51 Installation Figure 23. Typical unit rigging—two-piece unit with three lifting lugs per air handler side 24 ft min Turnbuckle or Chain Adjustment for each lug (a) Turnbuckle or Chain Adjustment required for each lifting point RT-SVX24J-EN...

  • Page 52: Air-Cooled And Evaporative Condensers-Three-Piece Unit Fit Up

    Installation Figure 24. Typical unit rigging—three-piece unit Air-Cooled and Evaporative Condensers— 8. Remove and discard shipping protection panels and top block off from outside air section. Three-Piece Unit Fit Up 9. Rig and set outside air section onto roof curb using the 1.
  • Page 53 Installation 15. Apply gasket to side panels removed earlier. Attach Figure 26. Evaporator section shipping protection side panel to unit split. removal 16. Apply 1.25" butyl tape on top of unit split along the roof seam. 17. Attach roof cap over roof seam and butyl tape with screws Discard shipping protection...
  • Page 54 Installation Figure 28. Evaporator section gasket locations Rail guides Gasket Butyl Tape Figure 29. Outside air section shipping protection removal Discard shipping protection RT-SVX24J-EN...
  • Page 55 Installation Figure 30. Base rail connection Lifting lug Threaded rod Backing Plate Figure 31. Roof rail connection Brackets RT-SVX24J-EN...

  • Page 56: Air-Cooled And Evaporative Condensers-Two-Piece Unit Fit Up

    Installation Figure 32. Roof panel splice plate connection 3. Take off and discard the protection boxes. (Do not remove wire shields). 4. Remove the rail connector splice brackets and install the brackets on the low side unit base rails. 5. Take off the side panels (these are labeled) and the top cover of the high side unit and set aside to be assembled later.
  • Page 57 Installation Figure 35. (3) Side and top filler panel removal/(4) high side installation preparation Filler panel shipping position Filler panel Top cover shipping position shipping position Note: Remove the filler panels and top cover before putting the Indoor and Outdoor sections together and screw to both Indoor and Outdoor panels on each side as shown in fig (6).
  • Page 58 Installation Figure 36. (5) Connected tubes/(6) install panels Connected tubes RT-SVX24J-EN...

  • Page 59: Complete Tubing And Wiring Connections As Follows

    Installation Figure 37. Charge evacuation diagram - evaporative condensers Complete Tubing and Wiring Connections Note: Additional care should be taken when brazing near the wire bundle. as follows: 4. Sweat the copper caps off both the high and low side Air-Cooled Tubing Connection of the suction and liquid lines of both circuits.

  • Page 60: Evaporative Condenser Tubing Connection

    Installation If the rise exceeds this, there is either still moisture in the system or a leak is present. WARNING 10. Charge the system per the unit nameplate field Hazard of Explosion and Deadly Gases! charge.Do not add refrigerant in the suction line at this Never solder, braze or weld on refrigerant lines or any time to prevent excessive refrigerant in the low side unit components that are above atmospheric pressure...

  • Page 61: Electric Heat Wiring Connection

    Installation Figure 38. Wire routing at low side end wall WARNING Proper Field Wiring and Grounding Rain Shield Bracket Required! All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field Armaflex with wiring poses FIRE and ELECTROCUTION hazards. To Wire Ties avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in...

  • Page 62: General Unit Requirements

    Installation Figure 39. Wire routing and connections Electric Heat Power Wires - Routed through the hole Electric Heat at the air handler side end wall. Route wires one by one Terminal Block and connect to the electric heat terminal block. Electric Heat Control Wires - Routed through the hole at the air handler side end wall.

  • Page 63: Rigging The Unit

    Installation Rigging the Unit [ ] Drip leg Installed in the gas piping near the unit. [ ] Gas piping leak checked with a soap solution. If [ ] Set the unit onto the curb; check for levelness. piping connections to the unit are complete, do not [ ] Ensure unit-to-curb seal is tight and without buckles pressurize piping in excess of 0.50 psig or 14 inches or cracks.

  • Page 64: Units With Gas Furnace

    Installation connections. Refer to Detail A in Figure 12, p. 23 for the Removing Supply and Exhaust Fan location of these drain connections. Shipping Channels A condensate trap must be installed due to the drain Each supply fan assembly and exhaust fan assembly is connection being on the “negative pressure”...
  • Page 65 Installation 6. Use screw gun to unscrew the two screws that hold the 9. Remove the bracket and all the removed screws from fan shipping bracket.The bracket should drop down the unit. but still remain engaged with a hook on the bracket. Important: Make sure there are no screws remaining in 7.

  • Page 66: O/A Sensor And Tubing Installation

    Installation O/A Sensor and Tubing Installation 3. Place the sensor mounting slotted bracket to the L mounting bracket with the slot located to the top. An Outside Air Pressure Sensor is shipped with all units 4. Install the sensor vertically to the slotted bracket and designed to operate on variable air volume applications or secure it with provided bolt and nut.

  • Page 67: Evaporative-Cooled Condenser Make-Up

    Installation Figure 45. Space pressure and duct supply pressure tubing schematic Evaporative-Cooled Condenser Make-up line should be flushed prior to connection to the unit, whether or not there is a strainer. Water and Drain Line Installation Note: Backflow preventer is field installed and should Make-up Water and Drain Lines only be installed by qualified personnel .

  • Page 68: Gas Heat Units

    Installation Make Up Water Solenoid Valve 5. Take all branch piping from any main gas line from the top at 90 degrees or at 45 degrees to prevent moisture This valve is controlled by the UCM based on water level from being drawn in with the gas.
  • Page 69 Installation Table 16. Sizing natural gas pipe mains and branches Table 17. Specific gravity multipliers Gas Input (Cubic Feet/Hour)* Specific Gas Supply Gravity Multiplier Pipe Run 1¼" 1½" 2" 2½" 3" 4" (ft) Pipe Pipe Pipe Pipe Pipe Pipe 0.50 1.10 0.55 1.04...
  • Page 70 Installation Figure 47. Modulating (850-2500 Mbh heaters) and two-stage (1800-2500 Mbh heaters) natural gas train Ignition control board Ignition transformer Combustion blower pressure switch Butterfly gas Safety valve control valve Single stage regulating valve Actuator Combustion blower Gas heat inlet sizes Figure 48.
  • Page 71 Installation Figure 49. Gas heat piping penetration locations 2.5M & 1.8M (W=16 1/8in, D=14 11/16in) 1.1M, 0.8M (W=9 15/16in, D=9 12/16in) Hole at the base 20 7 16 Ø3 Unit end plane Top View Horizontal gas pipe inlet Pipe type: Black pipe, sch 40 Condensate drain outlet Pipe type: cpvc Edge of mist eliminator...
  • Page 72 Installation Table 19. Gas heat piping penetration measurements Condensate Drain Gas Connection, Gas Connection, Gas Flue Outlet Horizontal Base Horizontal Distance Energy Mist Elim Unit End Unit End Recovery to Flue C/L to Hole C/L to Hole C/L Wheel Heat Tons (ERW) Pieces...
  • Page 73 Installation a. install an automatic air vent at the top of the return header, using the tapped pipe connection CAUTION Leakage! b. vent the coil from the top of the return header down Properly seal all penetrations in unit casing. Failure to to the return piping.
  • Page 74 Installation 7. Install a “Gate” type valve in the supply branch line as Figure 50. Hot water and steam heat connection location close as possible to the steam main and upstream of any other device. 8. Install a “Gate” type valve in the return branch line as close as possible to the condensate return main and Recommended downstream of any other device.
  • Page 75 Installation Figure 51. Hot water coil piping Figure 52. Steam coil piping RT-SVX24J-EN...

  • Page 76: Disconnect Switch W/External Handle

    Installation Disconnect Switch w/External Handle Note: All field installed wiring must conform to NEC guidelines as well as State and Local codes. Units come equipped with a factory mounted disconnect switch with an externally mounted handle.This allows the WARNING operator to disconnect power from the unit without having Live Electrical Components! to open the control panel door.The handle locations and its three positions are shown below;...

  • Page 77: Main Unit Power Wiring

    Installation Main Unit Power Wiring • the “Maximum Over current Protection” (MOP) device, Figure 56, p. 78 lists the field connection wire ranges for • the “Recommended Dual Element fuse size” (RDE). both the main power terminal block and the optional main 1.
  • Page 78 Installation Figure 55. Typical field power wiring Figure 56.Customer connection wire range Note: Non-fused disconnect switch size is calculated by selecting the size greater than or equal to 1.15 X (sum of unit loads). See unit literature for unit load values. (See following page for circuit breaker sizing) RT-SVX24J-EN...

  • Page 79: Power Wire Sizing And Protection Devices

    Installation Power Wire Sizing and Protection Devices Set 2. Rooftop units with Electric Heat To arrive at the correct MCA, MOP , and RDE values for To correctly size electrical service wiring for a unit, find the these units, two sets of calculations must be performed. appropriate calculations listed below.
  • Page 80 Installation Table 23. Electrical service sizing data—motors Table 25. Electrical service sizing data—control power transformer (heating mode only) Condenser Fan Motors Voltages 460 V 575 V 380 V Nominal Tons No. of Fans Digit 2 Unit Nominal Tons Function 90, 105 16.2 13.2 90-150/100-162...

  • Page 81: Field Installed Control Wiring

    Installation unit and Table 32, p. 81 for AC conductor sizing guidelines, Table 30. Electrical service sizing data—convenience and; outlet transformer a. Use copper conductors unless otherwise specified. Voltage b. Ensure that the AC control wiring between the controls and the unit's termination point does not Nominal Tons FLA (add) FLA (add) exceed three (3) ohms/conductor for the length of...

  • Page 82: Constant Volume System Controls

    Installation c. Must not pass between buildings. 80°F .The warm-up setpoint ranges between 50 and 90°F with a 2 degree deadband.The Unoccupied cooling Constant Volume System Controls setpoint ranges between 45 and 98°F .The heating setpoint ranges between 43 and 96°F . Remote Panel w/o NSB—BAYSENS110* The liquid crystal display (LCD) displays zone temperature, This electronic sensor features four system switch settings...

  • Page 83: Single Zone Variable Air Volume & Rapid

    Installation Remote Minimum Position Potentiometer – Return VFD - Min (if so equipped) (BAYSTAT023*) 2. EMERG_DEPRESSURIZE: The remote minimum position potentiometer is used on – Supply Fan - Off units with an economizer. It allows the operator to – Supply Fan VFD - Closed/Min (if so equipped) remotely set the economizer minimum position (which –...

  • Page 84: Ventilation Override Module (Vom)

    Installation – OA Dampers - Closed; Return Damper - Open fan should be turned on with VFD at 100% speed and exhaust fan should be turned off. – Heat - All heat stages off; Mod Heat output at 0 VDC –...

  • Page 85: Temperature Vs. Resistance Coefficient

    Installation – Heat - All heat stages off; Mod Heat output at 0 VDC Table 34. Temp vs. resistance (continued) – Occupied/Unoccupied/VAV box output - Energized Resistance (in. Resistance (in. Temp (F) 1000 Ohms) Temp (F) 1000 Ohms) – VOM Relay - Energized 46.94 9.30 –...
  • Page 86 Resistance coefficient. Generic Building Automation System The Generic Building Automation System (GBAS) module allows a non-Trane building control system to communicate with the rooftop unit and accepts external setpoints in form of analog inputs for cooling, heating, demand limiting, and supply air pressure parameters.
  • Page 87 Installation Figure 57. Typical field wiring diagram for 90 to 162 ton CV control options RT-SVX24J-EN...
  • Page 88 Installation Figure 58. Typical ventilation override binary output for 90 to 162 ton CV control options RT-SVX24J-EN...
  • Page 89 Installation Figure 59. Typical field wiring diagram for 90 to 162 ton VAV control options RT-SVX24J-EN...
  • Page 90 Installation Figure 60. Typical field wiring diagram notes for 90 to 162 ton VAV and CV control options RT-SVX24J-EN...
  • Page 91 Installation Figure 61. Typical GBAS analog input wiring diagram for 90 to 162 ton CV and VAV control options Note: See Figure 64, p. 99 RT-SVX24J-EN...
  • Page 92 Installation Table 35. GBAS voltage vs. setpoint Setpoint GBAS 0-5 VDC GBAS 0-10 VDC Valid Range Occ Zone Cooling Setpoint(CV only) 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F Unocc Zone Cooling Setpoint 0.5 to 4.5 VDC 0.5 to 9.5 VDC 50 to 90°F Occ Zone Heating Setpoint(CV only)

  • Page 93: Installation Checklist

    Installation Checklist Installation Checklist  General Checklist (applies to all units) Lift the unit and position it over the pedestal   Use the rail splice bracket as an alignment aid to Unit checked for shipping damage and material connect the Low and high side units.The Low and high shortage side unit rails should be butted together with a maximum ...
  • Page 94 Installation Checklist   Using 0.75" x 24" threaded rod pull and secure Install 1/2", 15-degree swing check vacuum breaker(s) evaporator section and outside air section together at the top of each coil section. Vent breaker(s) to the  atmosphere or merge with return main at discharge side of Using .375"...
  • Page 95 Installation Checklist Energy Recovery Wheel  Verify that the wheel turns freely though a full rotation  Confirm that all wheel segments are fully engaged in the wheel frame and that the segment retainers are completely fastened  Confirm the seal adjustment and proper belt tracking on the wheel rim RT-SVX24J-EN...

  • Page 96: Unit Startup

    Unit Startup Sequence of Operation ramp up beyond 37% as determined by the activeTset calculation; the speeds below are only the minimum speeds per cooling stage. Note that when transitioning between active cooling stages, compressors may energize NOTICE: prior to the supply fan reaching the minimum speed for the Compressors Failure! associated step.

  • Page 97: Units With Evaporative Condenser Sequence Of Operation

    Unit Startup Low Ambient Compressor Operation Units with Evaporative Condenser Sequence of Operation Certain applications require compressor operation at lower ambient conditions than standard units. Low Upon a power up without water in the sump, the ambient compressor operation is a factory configured condenser sump drain will be controlled to allow the sump option that allows units to operate down to -10°F by to hold water.The fill relay will be energized if there is a call...
  • Page 98 Unit Startup The drain control can be configured via the Human Evaporative Condenser Drain Valve Setup Interface, and by the drain actuator installation, to hold or The drain valve is shipped to “Drain During Unit Power drain water on power loss; the default is set to drain. Loss Conditions.
  • Page 99 Unit Startup Chemical Water Treatment Tree Figure 63. Actuator shaft adapter removal/assembly TheTrane evaporative condenser comes with a PVC tree to allow easier inputs for third party water treatment.The tee Locking clip labeled A is a ¾ inch NPT threaded input, see Figure Tees B and C are 1/2 inch NPT threaded inputs.The ball valve can be used to stop the water flow through the tree...
  • Page 100 Unit Startup 2. The second setpoint will be the emergency point 14. Press the ENTER key to save the conductivity rating and return to the CALIBRATE menu. – The second setpoint will open the normally closed K2 relay which will interrupt the sump proving 15.

  • Page 101: Modulating Dehumidification (Hot Gas Reheat) Sequence Of Operation

    Unit Startup protection circuit before closing “Stage 1". After the first concentrations. If the CO concentration is greater than functional stage has started, the compressor module the Design Minimum CO Setpoint the OA damper will be monitors the saturated refrigerant temperature and closes opened to the Design Minimum OA Damper Setpoint (w/ the condenser fan output contact, when the saturated oTRAQ) or until the Design Minimum OA Flow Setpoint is...
  • Page 102 Unit Startup control devices as well as a split condenser coil with one – Humidity Sensor Failure placed section in the indoor air stream and the other in the – For VAV units, (in occupied) dehumidification will outdoor coil compartment. be disabled if space temp is less than the Dehumid During active dehumidification the discharge unit Override Low Zone Setpoint or higher than the...

  • Page 103: Energy Recovery Sequence Of Operation

    Unit Startup components will return to the state they were in prior to In cooling mode the exhaust air bypass damper is held entering purge. closed, providing 100% energy recovery capacity during cooling modes of operation. In heating modes, including During dehumidification control an evaporator frost CV heating, VAV Heating, CV Supply AirTempering, VAV control function designed specifically for reheat modes...
  • Page 104 Unit Startup Figure 66. Energy recovery wheel exhaust air setpoint temperatures Figure 67. Energy recovery wheel operation Outside Air Intake Damper (Mist Eliminator not shown) Outside Air Bypass Damper Exhaust Air, Leaving Energy Recovery Wheel, Path to Exhaust Fan Energy Recovery Wheel Conditioned Outside Air Unit Return Airflow...

  • Page 105: Gas Heating Sequence Of Operation Standard

    Unit Startup Figure 68. Energy recovery wheel economizer operation Outside Air Intake Damper (Mist Eliminator not shown) Outside Air Bypass Damper Path to Filters Conditioned & Coil Outside Air Exhaust Air, Path to Exhaust Fan Path to Unit Return Filters Airflow &...

  • Page 106: Modulating Gas Sequence Of Operation

    Unit Startup (1800 & 2500 MBH Two Stage Natural Gas) When there is a call for heat, the heat module energizes the combustion blower which causes the combustion air flow When a heating requirement exists, the Rooftop Module switch to close.The ignition control board will energize (RTM) starts the supply fan and sends a request for heat to providing that the indoor air flow switch, high limit, and the Heat Module.The Heat Module closes contacts and...

  • Page 107: Electric Heat-Cv, Vav Daytime Warm-Up

    Unit Startup sequence of operation. As you review the sequence of there is a call for economizer cooling, the damper may be operations, remember these points: opened further to satisfy the cooling request. 1. The high limit switch will trip if exposed to a If the space CO level is greater than the DCV Minimum temperature greater than the trip point, and will reset...

  • Page 108: Wet Heat Sequence Of Operation

    Unit Startup Temperature Differential Setpoint minus 5°F but not the EvaporatorTemperature Differential Setpoint, an WARNING information only, auto-reset, High Superheat diagnostic is Hazardous Voltage! initiated. If the calculated superheat exceeds the EvaporatorTemperature Differential Setpoint, a manual Disconnect all electric power, including remote disconnects before servicing.

  • Page 109: Voltage Supply And Voltage Imbalance

    Unit Startup internally connected for clockwise rotation with the incoming power supply phased as A, B, C. WARNING Proper electrical supply phasing can be quickly Live Electrical Components! determined and corrected before starting the unit by using During installation, testing, servicing and an instrument such as an Associated Research Model 45 troubleshooting of this product, it may be necessary to Phase Sequence Indicator and following the steps below:...
  • Page 110 Unit Startup RT-SVX24J-EN...
  • Page 111 Unit Startup RT-SVX24J-EN...
  • Page 112 Unit Startup Table 38. Service test guide for component operation — part II of II Component Configuration Component Unocc Sump Pump Sump Heater Econo Exhaust Being Tested Relay Damper Damper Output COMPRESSOR 90 - 105 Ton Closed Closed Default Closed Closed Default Closed...

  • Page 113: Verifying Proper Fan Rotation

    Unit Startup Service Testing—Evaporative Condenser 5. Use Table 37, p. 110 to program the unit Fans for operation by scrolling through the displays. All of the Components Fans (Supply, Exhaust, and Condenser fans) can be programmed to be “On” , if desired. From the Compressor and Condenser Service Menu screens—Head Pressure Control: AUTO or Head Pressure Refer to...

  • Page 114: If All Of The Fans Are Rotating Backwards

    Unit Startup If all of the fans are rotating backwards; Note: Interchanging “Load” side power wires at the fan contactors will only affect the individual fan a. Press the STOP key at the Human Interface Module rotation. Ensure that the voltage phase sequence at in the unit control panel to stop the fan operation.

  • Page 115: System Airflow Measurements

    Unit Startup System Airflow Measurements amperage at the supply fan contactors. If the amperage exceeds the motor nameplate value, the Constant Volume Systems static pressure is less than design and the airflow is too high. If the amperage is below the motor nameplate 1.
  • Page 116 Unit Startup be too high and CFM may be too low.To determine the actual CFM (± 5%); WARNING a. Measure the actual fan RPM Hazardous Voltage! b. Calculate theTheoretical BHP Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ Actual Motor Amps X Motor HP tagout procedures to ensure the power can not be Motor Nameplate Amps...
  • Page 117 Unit Startup key to display the first service screen. Refer to the Motor Nameplate Amps latest edition of the appropriate programming Use appropriate figures beginning with Figure 71, p. 118 manual for applications for the SERVICETEST calculate a new fan drive if the CFM is not at design screens and programming instructions.

  • Page 118: Performance Data

    Unit Startup Performance Data Supply Fan with or without Variable Frequency Drive Figure 70. Supply fan performance LOW CFM — 90/100 tons, 25” supply fan Figure 71. Supply fan performance STANDARD CFM — 90/100 and 105/118 tons, 36” supply fan RT-SVX24J-EN...
  • Page 119 Unit Startup Figure 72. Supply fan performance LOW CFM — 105-162 ton, 32” supply fan Figure 73. Supply fan performance STANDARD CFM — 120-162 tons, 40” supply fan RT-SVX24J-EN...

  • Page 120: Airside Pressure Drop Standard Evaporator Coil

    Unit Startup Airside Pressure Drop Standard Evaporator Coil Figure 74. Wet airside pressure drop at 0.075 lb./cu. ft.—90-162 tons standard evaporator coil Figure 75. Dry airside pressure drop at 0.075 lb./cu. ft.—90-162 tons standard capacity evaporator coil RT-SVX24J-EN...
  • Page 121 Unit Startup Figure 76. Wet airside pressure drop at 0.075 lb./cu. ft.—90-140 tons high capacity evaporator coil Figure 77. Dry airside pressure drop at 0.075 lb./cu. ft.—90-140 tons high capacity evaporator coil RT-SVX24J-EN...

  • Page 122: Exhaust Fan Performance

    Unit Startup Exhaust Fan Performance Figure 78. Exhaust fan performance LOW CFM — 90/100 tons Figure 79. Exhaust fan performance STANDARD CFM — 90/100 tons; LOW CFM — 105-162 tons RT-SVX24J-EN...

  • Page 123: Return Fan Performance

    Unit Startup Figure 80. Exhaust fan performance STANDARD CFM — 105-162 tons Return Fan Performance Figure 81. Return fan performance LOW CFM — 90-162 tons RT-SVX24J-EN...
  • Page 124 Unit Startup Figure 82. Return fan performance STANDARD CFM — 90-118 tons Figure 83. Return fan performance STANDARD CFM — 120-162 tons RT-SVX24J-EN...

  • Page 125: Component Static Pressure Drops

    Unit Startup Component Static Pressure Drops in. H Table 40. Component static pressure drops ( Evaporator Coil Reheat Standard High Capacity Coil (Dampers wide open) Return Econo TRAQ Tons Damper Damper Damper 16000 0.10 0.13 0.17 0.22 0.04 0.06 0.11 0.19 20000 0.15...
  • Page 126 Unit Startup in. H O) (continued) Table 40. Component static pressure drops ( Electric Gas Heating Hydronic Heating Coil Data Heating Low Heat Medium Heat High Heat Hot Water Coil Steam Coil (Horizontal) All kW's Tons High High 16000 0.01 0.01 0.10 0.01...
  • Page 127 Unit Startup in. H O) (continued) Table 40. Component static pressure drops ( Standard Filter Section (Pre Evap) Final Filter Section (Post Evap) 90-95% 90-95% 90-95% 90-95% Std Temp 90-95% Hi Temp 90-95% Temp 90-95% 90-95% 90-95% 90-95% Low PD Temp Std Temp Cartridge...
  • Page 128 Unit Startup in. H O) (continued) Table 40. Component static pressure drops ( Standard Filter Section (Pre Evap) Final Filter Section (Post Evap) 90-95% 90-95% 90-95% 90-95% Std Temp 90-95% Hi Temp 90-95% Temp 90-95% 90-95% 90-95% 90-95% Low PD Temp Std Temp Cartridge...
  • Page 129 Unit Startup Table 41. Energy recovery wheel component static pressure drops Outside Air Bypass Outside Air Bypass Exhaust Air Bypass Exhaust Air Bypass Tons Damper Open Damper Closed Damper Open Damper Closed Low CFM Energy Recovery Wheel 8000 0.07 0.78 0.09 0.66 9000...
  • Page 130 Unit Startup Table 41. Energy recovery wheel component static pressure drops (continued) Outside Air Bypass Outside Air Bypass Exhaust Air Bypass Exhaust Air Bypass Tons Damper Open Damper Closed Damper Open Damper Closed 9000 0.09 0.71 0.10 0.62 12000 0.15 0.97 0.18 0.92...
  • Page 131 Unit Startup Table 41. Energy recovery wheel component static pressure drops (continued) Outside Air Bypass Outside Air Bypass Exhaust Air Bypass Exhaust Air Bypass Tons Damper Open Damper Closed Damper Open Damper Closed 9000 0.08 0.57 0.09 0.47 12000 0.14 0.77 0.16 0.65...
  • Page 132 Unit Startup Table 41. Energy recovery wheel component static pressure drops (continued) Return Damper, Econo Damper, Tons ERW only ERW only 16000 0.14 0.15 20000 0.20 0.24 25000 0.29 0.39 90/100 30000 0.42 0.56 33000 0.51 0.69 36000 0.61 0.82 40000 0.75 1.01...
  • Page 133 Unit Startup Table 42. Energy recovery wheel pLoss P (in. wg), and total effectiveness 90-118 Tons 120/128 Tons 130-162 Tons 90/100 Tons 105/118 Tons 120/128 Tons 130-162 Tons Standard Standard Standard Standard Actual Air Flow CFM P P P P P P P...

  • Page 134: Pressure Curves

    Unit Startup Pressure Curves (60 Hz) Air-Cooled Condensers Figure 84. Operating pressure curve (all comp. and cond. fans per ckt. on)—90 tons std. capacity Figure 85. Operating pressure curve (all comp. and cond. fans per ckt. on)—90 tons high capacity RT-SVX24J-EN...
  • Page 135 Unit Startup Figure 86. Operating pressure curve (all comp. and cond. fans per ckt. on)—105 tons std. capacity Figure 87. Operating pressure curve (all comp. and cond. fans per ckt. on)—105 tons high capacity RT-SVX24J-EN...
  • Page 136 Unit Startup Figure 88. Operating pressure curve (all comp. and cond. fans per ckt. on)—120 tons std. capacity Figure 89. Operating pressure curve (all comp. and cond. fans per ckt. on)—120 tons high capacity RT-SVX24J-EN...
  • Page 137 Unit Startup Figure 90. Operating Pressure Curve (All Comp. and Cond. Fans per ckt. on)—130 Tons Std. Capacity Figure 91. Operating Pressure Curve (All Comp. and Cond. Fans per ckt. on)—130 Tons High Capacity RT-SVX24J-EN...
  • Page 138 Unit Startup Figure 92. Operating pressure curve (all comp. and cond. fans per ckt. on)—150 ton std. capacity Note: Due to the variable speed fans on Evaporative conditions are needed, contact a localTrane sales Condenser units, typical operating pressure curves representative.
  • Page 139 Unit Startup Figure 94. Operating pressure curve (all comp. and cond. fans per ckt. on)—90 tons high capacity Figure 95. Operating pressure curve (all comp. and cond. fans per ckt. on)—105 tons standard capacity RT-SVX24J-EN...
  • Page 140 Unit Startup Figure 96. Operating pressure curve (all comp. and cond. fans per ckt. on)—105 tons high capacity Figure 97. Operating pressure curve (all comp. and cond. fans per ckt. on)—120 tons standard capacity RT-SVX24J-EN...
  • Page 141 Unit Startup Figure 98. Operating pressure curve (all comp. and cond. fans per ckt. on)—120 tons high capacity Figure 99. Operating pressure curve (all comp. and cond. fans per ckt. on)—130 tons standard capacity RT-SVX24J-EN...
  • Page 142 Unit Startup Figure 100. Operating pressure curve (all comp. and cond. fans per ckt. on)—130 tons high capacity Figure 101. Operating pressure curve (all comp. and cond. fans per ckt. on)—150 tons standard capacity Note: Due to the variable speed fans on evaporative condenser units, typical operating pressure curves are not relevant.

  • Page 143: Components

    Unit Startup Components WARNING Standard Unit without Energy Recovery Hazardous Voltage! Wheel Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ Economizer Damper Adjustment tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power Exhaust Air Dampers before servicing could result in death or serious injury.
  • Page 144 Unit Startup measure the return static pressure at the location Figure 102. Outside air and return air damper assembly determined in step 1. 9. Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation. 10.
  • Page 145 Unit Startup Figure 103. Outside air and return air economizer assembly (w/TRAQ™ dampers) TRAQ Damper Linkage TRAQ damper Jackshaft Top view RT-SVX24J-EN...

  • Page 146: Standard Unit With Energy Recovery

    Unit Startup Standard Unit with Energy Recovery Table 43. Standard unit (no ERW) (economizer) outside Wheel air damper travel adjustment/pressure drop (inches w.c.) Economizer Damper Adjustment - ERW units Damper Position Outside & Return Air Damper Operation Economizer Linkage Set-up The outside air and return air damper actuators are Jackshaft rod accessible through from the filter section of the unit.The...
  • Page 147 Unit Startup 6. Once the configuration for the components is 18. Plug the holes drilled in the cabinet after the proper complete, press the NEXT key until the LCD displays airfow has been established. the “Start test in __Sec." screen. Press the + key to To Adjust the Return Damper Actuators: designate the delay before the test is to start.This service test will begin after theTEST START key is...
  • Page 148 Unit Startup RT-SVX24J-EN...
  • Page 149 Unit Startup RT-SVX24J-EN...
  • Page 150 Unit Startup RT-SVX24J-EN...

  • Page 151: Energy Recovery Wheel (Erw)

    Unit Startup Figure 104. IntelliPak II energy wheel section Energy Recovery Wheel (ERW) WARNING The IntelliPak™ II energy wheel section consists of the Confined Space Hazards! energy wheel cassette assembly, return air, outside air, and bypass dampers, and outside air mist eliminators. Do not work in confined spaces where refrigerant or Double opposing large access doors are provided on both other hazardous, toxic or flammable gas may be...
  • Page 152 Unit Startup WARNING WARNING Rotating Components! Rotating Components! During installation, testing, servicing and The following procedure involves working with rotating troubleshooting of this product it may be necessary to components. Disconnect all electric power, including work with live and exposed rotating components. Have remote disconnects before servicing.
  • Page 153 Unit Startup CHM00021 at your localTrane parts center) or in an Segment Removal alkaline detergent and warm water. 2. Soak the segments in the solution until grease, oil, and WARNING tar deposits are loosened. Hazardous Voltage! 3. Before removing the cleaner, rapidly run your fingers Disconnect all electric power, including remote across the surface of segments to separate polymer disconnects before servicing.
  • Page 154 Unit Startup Figure 106. Segment Retainers Figure 107. Segment Removal WARNING WARNING Hazardous Voltage! Rotating Components! Disconnect all electric power, including remote The following procedure involves working with disconnects before servicing. Follow proper lockout/ rotating components. Disconnect all electric power, tagout procedures to ensure the power can not be including remote disconnects before servicing.

  • Page 155: Sharp Edges

    Unit Startup Inner Segment Removal Procedure: Segment Replacement 1. Disconnect all electrical power. WARNING 2. Secure wheel from rotation. Hazardous Voltage! CAUTION Disconnect all electric power, including remote Sharp Edges! disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be The service procedure described in this document inadvertently energized.

  • Page 156: Service And Repair

    Unit Startup Outer or Satellite Segment Replacement Filtration WARNING WARNING Hazardous Voltage! Hazardous Voltage! Disconnect all electric power, including remote Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be tagout procedures to ensure the power can not be inadvertently energized.
  • Page 157 Unit Startup periodic adjustment is required. Inspect the belt annually 9. Manually rotate the wheel counter-clockwise to for proper tracking and tension. A properly tensioned belt position the belt retainer clip close to the center beam will turn the wheel immediately, with no visible slippage, and diameter seals.

  • Page 158: Seal Adjustment

    Unit Startup Figure 111. Retaining clip location Figure 112. Wheel rotation Note: Pile seal brackets are fixed with a single screw to the cassette frame near the ends of the wheel bearing beam. Because the height of the belt link is slightly higher than that of the urethane belt, a rare 4.

  • Page 159: Compressor Startup

    Unit Startup 8. Tighten the set screw to the drive shaft. Figure 115, p. 163 for the various compressor locations. 9. Stretch the belt over the pulley and engage it in the groove. 2. Once the configuration for the components is complete, press the NEXT key until the LCD displays Compressor Startup the “Start test in __Sec.

  • Page 160: Compressor Operational Sounds

    4. Once the configuration for the components is occurred. complete, press the NEXT key until the LCD displays The scroll compressor uses Trane OIL00079 (one quart the “Start test in __Sec. ” screen. Press the + key to container) or OIL00080 (one gallon container) without designate the delay before the test is to start.This...

  • Page 161: Evaporative Condenser Startup

    Unit Startup Evaporative Condenser Startup 6. Use screw gun to unscrew the two screws that hold the fan shipping bracket.The bracket should drop down Important: Water treatment by a qualified water but still remain engaged with a hook on the bracket. treatment expert is required to ensure 7.
  • Page 162 Unit Startup Figure 113. Fan shipping bracket removal Mist Eliminator Fan Shipping Bracket Screws Fan Shipping Bracket Access Doors Actuator Side Inlet Louvers Figure 114. Float bracket setting Fill sump so float shuts off when water is within these slots RT-SVX24J-EN...

  • Page 163: Thermostatic Expansion Valves

    Unit Startup 2. Using a Refrigerant/Temperature chart, convert the Figure 115. Compressor locations and staging sequence pressure reading to a corresponding saturated vapor temperature. 3. Measure the suction line temperature as close to the expansion valve bulb, as possible. Use a thermocouple type probe for an accurate reading.

  • Page 164: Electric, Steam And Hot Water Startup

    Unit Startup RTM Occ/Unocc Output (Unoccupied) Table 47. Minimum ambient Hydronic Heat Actuator (100% Open) Minimum Starting Ambient Open the main steam or hot water valve supplying the Standard Ambient rooftop heater coils. Unit Size with HGBP without HGBP 6. Once the configuration for the appropriate heating 90-162 system is complete, press the NEXT key until the LCD displays the “Start test in __Sec.

  • Page 165: Two Stage Gas Furnace

    Unit Startup monoxide, and a steady flame that minimizes nuisance 4. Once the system has started, check the appearance of shutdowns. the flame through the sight glass provided on the front of the heat exchanger. In appearance, a normal flame has a clearly defined shape, and is primarily (75%) blue WARNING in color with an orange tip.
  • Page 166 Unit Startup for the required manifold pressure during low-fire Note: Do not adjust the combustion air damper while operation. If it needs adjusting, remove the cap the furnace is operating at low-fire. covering the low-fire adjustment screw on the gas 4.

  • Page 167: Full Modulating Gas Furnace

    Unit Startup The 0-10 VDC signal controls the air damper actuator Figure 117. Flue gas carbon dioxide and oxygen which is mounted on the end of the air damper shaft. As measurements the actuator rotates clockwise, more combustion air passes through the combustion air blower. In turn, the gas butterfly valve opens more through a directly connected linkage, resulting in a higher rate of firing.
  • Page 168 Unit Startup Note: The burner capacity is controlled by the movement Note: It is normal for the low fire CO to be lower than the of the air damper.This has been preset at the high fire. factory and normally does not need field 9.

  • Page 169: Final Unit Checkout

    After completing all of the checkout and startup adequately distributed throughout the system, and all procedures outlined in the previous sections (i.e., ductwork has been attached to the unit,Trane will provide operating the unit in each of its Modes through all unit startup.
  • Page 170 Unit Startup startup and proper system subcooling and superheat will Units equipped with hot water heat will be checked to be verified. ensure that the hot water pipes are properly routed, sized and leak free; for the presence of swing joints or flexible The unit fans will be checked to ensure that the condenser connectors next to the hot water coil;...
  • Page 171 Unit Startup Table 49. Trane startup checklist Important: This checklist is not intended as a substitution for the contractor’s installation instruction. This checklist is intended to be a guide for theTrane technician just prior to unit 'startup'. Many of the recommended checks and actions could expose the technician to electrical and mechanical hazards.

  • Page 172: Start Unit

    Unit Startup Table 49. Trane startup checklist (continued) 30. Gas heat condensate line + heat tape installed where applicable Where applicable: HW/Steam Heat 31. Modulating valve and actuator (HW and Steam) installed/wired 32. Steam heat swing check vacuum breakers installed per IOM direction 33.

  • Page 173: Service And Maintenance

    Trane accepts no responsibility for the performance or operation of our equipment in which ultraviolet devices were installed outside of the Trane factory or its approved suppliers. Table 50. Control Settings and Time Delays Control Description Elec.
  • Page 174 Service and Maintenance Table 51. Gas Heat—High Limit 2500 MBH HIGH LIMIT CONTACTS CONTACTS UNIT FAN SIZE TONS (IN) CONFIG. OPEN CLOSE 120-162 DF & HORZ 1800 MBH HIGH LIMIT 32 &40 120-162 32 &40 DF & HZ DF & HZ 90-118 1100 MBH HIGH LIMIT 120-162...
  • Page 175 Service and Maintenance Table 52. Electric Heat—Selection Limits Hz (right) 150F 175F Low (25") High (262.5 kW) Downflow 215F 155F Hz (right) 235F 155F Low (90 kW) Downflow 150F 175F Hz (right) 150F 175F Table 53. Compressor Circuit Breaker Electrical Characteristics 460V 575V 380V...
  • Page 176 Service and Maintenance Table 54. Unit Internal Fuse Replacement Data & VFD Factory Settings Note: **See fuse replacement table onVFD panel forVFD power fuses (F40, F41, F42). RT-SVX24J-EN...
  • Page 177 Service and Maintenance RT-SVX24J-EN...
  • Page 178 Service and Maintenance RT-SVX24J-EN...
  • Page 179 When removing or installing the new belts, do not stretch inadvertently energized. For variable frequency drives them over the sheaves. Loosen the belts using the belt or other energy storing components provided by Trane tension adjustment bolts on the motor mounting base. or others, refer to the appropriate manufacturer’s...
  • Page 180 Service and Maintenance Figure 121.Tension Gauge Figure 122.Belt Tension 2. Set the large O-ring on the belt tension gauge at the deflection value determined in Step 1b. 3. Set the small O-ring at zero on the force scale of the gauge plunger.

  • Page 181: Scroll Compressor Replacement

    181. Anytime a compressor is replaced, the oil for each compressor within the manifolded set must be replaced. The scroll compressor uses Trane OIL00079 (one quart container) or OIL00080 (one gallon container) without Sight glass substitution.The appropriate oil charge for CSHN250 and CSHN315 scroll compressors is 14.2 pints.

  • Page 182: Vfd Programming Parameters

    Follow proper lockout/ inadvertently energized. For variable frequency drives tagout procedures to ensure the power cannot be or other energy storing components provided by Trane inadvertently energized. For variable frequency drives or others, refer to the appropriate manufacturer’s...

  • Page 183: Monthly Maintenance

    Rotating Components! inadvertently energized. For variable frequency drives During installation, testing, servicing and or other energy storing components provided by Trane troubleshooting of this product it may be necessary to or others, refer to the appropriate manufacturer’s work with live and exposed rotating components. Have...
  • Page 184 Note: The bearings are manufactured using a special inadvertently energized. For variable frequency drives synthetic lithium based grease designed for long or other energy storing components provided by Trane life and minimum lube intervals. Over lubrication or others, refer to the appropriate manufacturer’s can be just as harmful as not enough.

  • Page 185: Air-Cooled Coil Cleaning

    For evaporator and reheat coil cleaners, contact the local units for leak testing, always provide a pressure Trane Parts Center for appropriate detergents. regulator on the cylinder to prevent excessively high 1. Remove enough panels from the unit to gain safe unit pressures.

  • Page 186: Evaporative Condenser Coil Cleaning

    Service and Maintenance c. Spray the solution perpendicular (at 90 degrees) to Evaporative Condenser Coil Cleaning the coil face. Sump Water Management d. For evaporator and reheat coils, maintain a minimum clearance of 6" between the sprayer Water Supply nozzle and the coil. For microchannel condenser Overall performance of any water- cooled device can be coils, optimum clearance between the sprayer affected by suspended particulates, mineral...
  • Page 187 Service and Maintenance different times of the year.The sump water clarity should be checked periodically. The evaporative condenser has several design features to reduce the possibility of biological growth in the sump. These features include: • air inlets constructed to eliminate direct sunlight in the sump •...

  • Page 188: Final Process

    Service and Maintenance Table 61. Evaporative Condenser Models—Maintenance and Troubleshooting Maintenance Schedule Component Action Frequency Comments Fan Motor None Required Non-grease bearings Sump Pump Inspect / Clean 1 – 2 times per year Clean inlet openings to pump 1 – 2 times per year depending Sump can be drained and hosed out using hose bib Sump Inspect / Clean...
  • Page 189 Service and Maintenance RT-SVX24J-EN...

  • Page 190: Unit Wiring Diagram Number

    Unit Wiring Diagram Number Note: Wiring diagrams can be accessed via e-Library by entering the diagram number in the literature order number search field or by calling technical support. Table 64. Wiring diagram matrix Water Air Cooled Cooled Tonnnage Description VAV / SZ VAV Power 1-Piece...
  • Page 191 Unit Wiring Diagram Number Table 64. Wiring diagram matrix (continued) Water Air Cooled Cooled Tonnnage Description 2309-3902 All Tonnages + Air Handler Schematic/Connection Sup VFD w/Bypass 2309-3905 All Tonnages + Air Handler Schematic/Connection Exh/Rtn VFD w/o Bypass 2309-3906 All Tonnages + Air Handler Schematic/Connection Exh/Rtn VFD w/Bypass 2313-0818 All Tonnages + Air Handler...
  • Page 192 Unit Wiring Diagram Number Table 64. Wiring diagram matrix (continued) Water Air Cooled Cooled Tonnnage Description 2313-0900 90-150T & AH Connection, Common Control Modules - w/o Return VFD 2313-0901 100-162T Connection, Common Control Modules - w/o Return VFD 2309-3787 90-150T Connection, Raceway Devices - Condenser Zone (Air Cooled) 2313-0816 100-162T...
  • Page 193 Unit Wiring Diagram Number Table 64. Wiring diagram matrix (continued) Water Air Cooled Cooled Tonnnage Description 2313-0809 100-162T Schematic, Controls - MCM 2/3-Pc 2309-3641 All Tonnages Schematic, Controls - HEAT - Elec/ Hydronic Heat 2/3-Pc 2309-3642 All Tonnages Schematic, Controls - HEAT - 2-stg / Modulating Gas Heat 2/3-Pc 2309-3645 All Tonnages + Air Handler Schematic, LHI, ECEM, VCM, MPM w/o Exh or Rtn VFD...
  • Page 194 Unit Wiring Diagram Number Table 64. Wiring diagram matrix (continued) Water Air Cooled Cooled Tonnnage Description 2313-0872 90-150T Connection, Control Box - Standard 2/3-Pc 2313-0880 90-105T Connection, Control Box - Standard w/Low Ambient 2/3-Pc 2313-0888 120-150T Connection, Control Box - Standard w/Low Ambient 2/3-Pc 2313-0892 100-162T Connection, Control Box - Standard 2/3-Pc...
  • Page 195 Unit Wiring Diagram Number Table 64. Wiring diagram matrix (continued) Water Air Cooled Cooled Tonnnage Description 2313-0920 All Tonnages + Air Handler Connection Electric Heat 90kw (SCCR) 2313-0921 All Tonnages + Air Handler Connection Electric Heat 140kw (SCCR) 2313-0922 All Tonnages + Air Handler Connection Electric Heat 265kw (SCCR) 2313-0923 All Tonnages + Air Handler...

  • Page 196: Warranty And Liability Clause

    PRODUCTS COVERED -This warranty* is extended by THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE Trane Inc. and applies only to commercial equipment rated IN LIEU OF ALL OTHER WARRANTIES AND LIABILITIES, 20Tons and larger and related accessories.

  • Page 197: Index

    Index Compressor Module (SCM) detects a Operation 97 problem 15 Evaporative Condenser AC Conductors Compressor Motor Winding Startup 161 See Table 15 81 Thermostats 15 Evaporative-Condenser Cooled— Adjusting the Outside Air Compressor Operational Start-up 161 Damper 143 Sounds 160 Evaporator Temperature Sensor 13 Airflow Measurements 115 Compressor Start-up 159 Exhaust Air Dampers 143...
  • Page 198 Thermostatic Expansion Return Fan Sequence of Valves 163 Make-up Water and Drain Line Operation 107 Installation 67 Trane OIL-42 160 Roof Curb and Ductwork 45 Measuring Subcooling 163 Trane Startup 169 Rooftop Module 11 Measuring Superheat 163 TRAQ™ Sensor 101...
  • Page 199 Index Voltage Imbalance 109 Voltage Supply 109 Voltage Supply and Voltage Imbalance 109 Warranty and Liability Clause 196 Wet Heat 108 Zone Temperature - Cooling 16 Zone Temperature - Heating 16 RT-SVX24J-EN...
  • Page 200 HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. © 2013Trane All rights reserved...

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