Table of Contents
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Installation, Operation,
and Maintenance
Packaged Rooftop Air Conditioners
Precedent™- Electric/Electric
3 – 10 Tons – 60 Hz
Model Numbers
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.
July 2012
TSC036E - TSC060E
TSC072F - TSC120F
SAFETY WARNING
THC036E - THC060E
THC092E - THC120E
THC048F - THC092F
RT-SVX22J-EN
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Table of Contents
Troubleshooting
Related Manuals for Trane Precedent TSCSeries
Summary of Contents for Trane Precedent TSCSeries
- Page 1 Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent™- Electric/Electric 3 – 10 Tons – 60 Hz TSC036E - TSC060E THC036E - THC060E Model Numbers TSC072F - TSC120F THC092E - THC120E THC048F - THC092F 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 Carbon (HCFCs). Not all refrigerants containing these Revision Summary compounds have the same potential impact to the RT-SVX22J-EN (18 July 2012) environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs • MERV 8 filter with filter removal tool such as HCFCs and HFCs.
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Page 3: Table Of Contents
Table of Contents Model Number Description Ton Units) ......25 ....5 Model Number Notes . - Page 4 Table of Contents mechanical Control ....44 Set Point (HSP) ..... .55 ReliaTel units with Direct Drive Indoor Fan Test 3 - System Mode and Fan Selection .55 (7.5 - 10 Ton High Efficiency, 10 Ton Standard...
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Page 5: Model Number Description
Economizer, Dry Bulb 0-100% Convertible with Barometric Relief No Communications Interface Digit 4,5,6 - Nominal Gross Economizer, Reference Enthalpy Trane Communications Interface 0-100% without Barometric Relief LonTalk® Communications Interface Cooling Capacity (MBh) Economizer, Reference Enthalpy Novar 2024 Controls 3 Ton... -
Page 6: Model Number Notes
Model Number Description Switch without Barometric Relief for 20. Available for 3, 4, 5, 6, 7½, 8½ ton Clogged Filter Switch , Fan Failure horizontal configuration. standard/high efficiency models Switch and Condensate Drain Pan Barometric Relief for horizontal only. Overflow Switch configured units must be ordered Clogged Filter Switch , Discharge... -
Page 7: General Information
General Information Unit Inspection Compressor Nameplate As soon as the unit arrives at the job site The nameplate for the compressors are located on the side of the compressor. • Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data). -
Page 8: System Input Devices & Functions
FFS (Fan Failure Switch) If air flow through the unit is not is powered by 24 VAC. proven by the differential pressure switch connected to the RTCI - ReliaTel™ Trane Communication RTOM (factory set point 0.07 “w.c.) within 40 seconds Interface (Optional) -
Page 9: Low Pressure Control
General Information Compressor Disable (CPR1/2) Power Exhaust Control (Optional) This input incorporates the low pressure control (LPC) of ReliaTel Control each refrigeration circuit and can be activated by opening The power exhaust fan is started whenever the position of a field supplied contact installed on the LTB. the economizer dampers meets or exceed the power If this circuit is open before the compressor is started, the exhaust setpoint when the indoor fan is on. -
Page 10: Evaporator Frost Control
This electronic sensor features single setpoint capability and timed override with override cancellation. It is used ReliaTel™ Option with a Trane Integrated Comfort™ building management system. This input incorporates the Frostat™ control (FOS) mounted in the indoor coil circuit and can be activated by... -
Page 11: Discharge Line Temp Switch (Dlts)
General Information closing a field supplied contact installed in parallel with Maintenance Instructions provided with the literature the FOS. package for this unit. If this circuit is open before the compressor is started, the In order for the supply air smoke detector or return air compressor will not be allowed to operate. -
Page 12: Unit Dimensions
Unit Dimensions Unit Clearances installation. These clearances are the minimum distances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency. Figure 1, p. 12 illustrates the minimum operating and service clearances for either a single or multiple unit Figure 1. - Page 13 Unit Dimensions Figure 2. 3-5 ton standard efficiency, 3 ton high efficiency Note: All dimensions are in inches/millimeters. Figure 3. 3-5 ton standard efficiency, 3 ton high efficiency - roof curb Note: All dimensions are in inches/millimeters. 44 MM 44 MM 1038 1038 MM 1053...
- Page 14 Unit Dimensions Figure 4. 3-5 ton standard efficiency, 3 ton high efficiency - unit clearance and roof opening Note: All dimensions are in inches/millimeters. CLEARANCE 36” (914 MM) Figure 5. 6, 7½ (single) ton standard efficiency, 4 - 5 ton high efficiency Note: All dimensions are in inches/millimeters.
- Page 15 Unit Dimensions Figure 6. 6, 7½ (single) ton standard efficiency, 4 - 5 ton high efficiency - roof curb Note: All dimensions are in inches/millimeters. (356 MM) (2130 MM) Figure 7. 6, 7½ (single) ton standard efficiency, 4 - 5 ton high efficiency - unit clearance and roof opening Note: All dimensions are in inches/millimeters.
- Page 16 Unit Dimensions Figure 8. 7½ ton (dual) - 10 ton standard efficiency, 6 & 7½ (microchannel) ton high efficiency Note: All dimensions are in inches/millimeters. Figure 9. 7½ ton (dual) - 10 ton standard efficiency, 6 & 7½ (microchannel) ton high efficiency - roof curb Note: All dimensions are in inches/millimeters.
- Page 17 Unit Dimensions Figure 10. 7½ ton (dual) - 10 ton standard efficiency, 6 & 7½ (microchannel) ton high efficiency - unit clearance and roof opening Note: All dimensions are in inches/millimeters. Figure 11. 7½ (dehumidification) - 10 ton high efficiency Note: All dimensions are in inches/millimeters.
- Page 18 Unit Dimensions Figure 12. 7½ (dehumidification) - 10 ton high efficiency - roof curb Note: All dimensions are in inches/millimeters. 18 1/2” (470 MM) 6 5/8” 83 7/8” (168 MM) 1” (2130 MM) (25 MM) 34 3/8” 56 3/8” (873 MM) (1432 MM) 18 1/2”...
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Page 19: Installation
Installation Pre-Installation If an element has detached from its ceramic insulator, carefully put it back into place. Replace the heater elements if they present symptoms WARNING noted in item 2 or 3 above. Fiberglass Wool! Procedure Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance or repair will expose you to airborne WARNING... - Page 20 Installation Table 1. Maximum unit & corner weights (lbs) and center of gravity dimensions (in.) - cooling models Maximum Model Center of Gravity Weights Corner Weights (in.) Unit Model No. Shipping Length Width TSC036E/THC036E TSC048E TSC060E TSC072F 7½ TSC090F 7½ TSC092F 8½...
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Page 21: Foundation
Installation (a),(b) Table 2. Factory installed options (fiops)/accessory net weights (lbs) (continued) Economizer Electric Heaters Hinged Doors Manual Outside Air Damper Motorized Outside Air Damper Novar Control Oversized Motor — — Powered Convenience Outlet Powered Exhaust Reheat Coil — — Roof Curb Smoke Detector, Supply Smoke Detector, Return... - Page 22 Installation Figure 17. 4-6/ 7½ (Microchannel) ton high efficiency Figure 20. 4-6/ 7½ (Microchannel) ton high efficiency units and 6-10 ton standard efficiency units - units and 6-10 ton standard efficiency units - Horizontal supply & return air openings downflow supply & return air openings w/ through the base utilities Figure 21.
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Page 23: Roofcurb
Installation Step-by-step curb assembly and installation instructions Table 3. Clearance required from duct to combustible ship with each accessory roof curb kit. Follow the surfaces instructions carefully to assure proper fit-up when the unit is set into place. Note: To assure proper condensate flow during Clearance required from duct to operation, the unit (and curb) must be level. -
Page 24: Rigging
Installation 4. Install a lifting bar, as shown in Figure 15, p. 20, to Figure 23. View for base to roof curb alignment protect the unit and to facilitate a uniform lift. The THC092-120E on 60" x 84" roof curb minimum distance between the lifting hook and the top of the unit should be 7 feet. -
Page 25: General Unit Requirements
Installation General Unit Requirements Note: Failure to use recommended sealant could result in unit performance loss. The checklist listed below is a summary of the steps If a unit is to be converted to a Horizontal discharge, the required to successfully install a commercial unit. This following conversion must be performed: checklist is intended to acquaint the installing personnel 1. -
Page 26: Tco-A Instructions
Installation Note: Certain unit/electric heater combinations require a Figure 27. Supply duct cover limit switch change out for horizontal airflow Supply Duct Cover applications. Refer to the following instructions to determine if this process is required for the unit undergoing installation. Figure 30. -
Page 27: Return Air Smoke Detector
Installation Table 4. TCO-A replaced for horizontal duct Figure 32. Downflow view configuration Unit Model Electric Heater Number Model Number TCO-A location BAYHTRA418, 427, TSC120F4, THC092F Right 436, 454 BAYHTRAW18A, 36A, TSC120FW Right THC072F4 BAYHTRU427, 436 Center TSC090F4 BAYHTRW427, 436 Center TSC090FW BAYHTRWW27, W36... -
Page 28: Main Electrical Power Requirements
Installation Figure 34. Horizontal view 2 WARNING Proper Field Wiring and Grounding Required! All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. -
Page 29: Filter Installation
Installation 2. Remove the support panel that the condensate drain Figure 35. Condensate trap installation pan exits through. 3. Slide the condensate drain pan out of the unit and rotate 180°. 4. Slide the condensate drain pan back into the unit, align the drain with the grommeted opening in the rear support panel and push until the coupling is seated in the grommet. -
Page 30: Main Unit Power
Installation switch or circuit breaker, a field supplied box. Apply Black Gasket around conduit plate on all disconnect switch must be installed at or 4 sides after installation to prevent air leakage from near the unit in accordance with the the building entering the electrical enclosures. -
Page 31: Control Power Transformer
Installation Control Power Transformer Table 6. Electromechanical thermostat 24V AC conductors with Electromechanical unit The 24 volt control power transformers are to be used only Distance from Unit to with the accessories called out in this manual. Control Recommended Wire Size Transformers rated greater than 50 VA are equipped with 0 - 30 feet 22 gauge... - Page 32 Installation Figure 38. ReliaTel conventional thermostat field wiring Figure 41. ReliaTel relative humidity sensor diagrams (dehumidification option) RTRM Figure 42. ReliaTel humidistat (dehumidification option) Figure 39. Typical field wiring diagrams for Electro Mechanical Thermostat 100 P (Red) 173 C (Brn) 101MM (Blu) 175 D (Blk) 174 B (Brn)
- Page 33 Installation Figure 43. Electro mechanical control customer low voltage routing (all units except 8½ - 10 ton high efficiency, and 7½ ton high efficiency with hot gas reheat dehumidification.) Figure 44. ReliaTel control customer low voltage routing (all units except 7½ (dehumidification) - 10 ton high efficiency) RT-SVX22J-EN...
- Page 34 Installation Figure 45. ReliaTel (without TBUE) control customer wire routing (7½ (dehumidification) - 10 ton high efficiency) Figure 46. ReliaTel (with TBUE) control customer wire routing (7½ (dehumidification) -10 ton high efficiency) RT-SVX22J-EN...
- Page 35 Installation Figure 47. Electromechanical (without TBUE) control customer wire routing (7½ (dehumidification) - 10 ton high efficiency) Figure 48. Electromechanical (with TBUE) control customer wire routing (7½ (dehumidification) - 10 ton high efficiency) RT-SVX22J-EN...
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Page 36: Smoke Detector Customer Low Voltage Wiring
Installation Smoke Detector Customer Low Figure 50. Up to 10 HVAC units If you have more than 5 HVAC units, you can Voltage Wiring connect all the supplies together on one power supply (up to 10 HVAC units), and all the returns When interlocking System Sensor smoke detectors together (up to 10 HVAC units) on another power together, all of the detectors must be powered from the... - Page 37 Installation Figure 51. Examples RT-SVX22J-EN...
- Page 38 Installation Figure 52. Typical field wiring diagrams for optional controls (ReliaTel only) BA YSENS075* BA YSENS075* BA YSENS108* BA YSENS106* BA YSENS110* BA YSENS119* BAYSENS073* BAYSENS074* BAYSENS075* ASYSTAT669A OPTIONAL REMOTE SENSOR RT-SVX22J-EN...
- Page 39 Installation Table 8. Temperature vs. resistance Temperature Nominal Degrees F° Degrees C° Resistance -20° -28.9° 170.1 K - Ohms -15° -26.1° 143.5 K - Ohms -10° -23.3° 121.4 K - Ohms -5° -20.6° 103.0 K - Ohms 0° -17.8° 87.56 K - Ohms 5°...
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Page 40: Pre-Start
Pre-Start Use the checklist provided below in conjunction with the Volt 1 + Volt 2 + Volt 3 “General Unit Requirements” checklist to ensure that the AV (Average Voltage)= unit is properly installed and ready for operation. V1, V2, V3 = Line Voltage Readings WARNING VD = Line Voltage reading that deviates the farthest from Hazardous Voltage w/Capacitors! -
Page 41: Compressor Crankcase Heaters (Optional)
Pre-Start “Line” side of the optional factory mounted disconnect Before starting the unit in the “Cooling” mode, set the switch to the “Off” position. system switch to the “Off” position and turn the main power disconnect to the “On” position and allow the •... -
Page 42: Test Modes
Pre-Start Table 9. Service test guide for component operation Multi-Speed Fan Test Step Mode Econ Comp 1 Comp 2 Heat 1 Heat 2 Resistance Output Output Minimum Position Setpoint 0% Ω 2.2K Minimum Selectable Ventilation Economizer Ω Open 3.3K Test Open Cool Minimum Ω... -
Page 43: Start-Up
Start-Up Verifying Proper Air Flow 1. Measure the supply and return duct static pressure and sum the resulting absolute values, 2. Use the accessory pressure drop table in the Service WARNING Facts, to calculate the total static pressure drop for all of the accessories installed on the unit;... -
Page 44: Units With Direct Drive Indoor Fan - Electro
Start-Up Once the supply fan has started, check for proper rotation. installed, before starting the SERVICE TEST disable the The direction of rotation is indicated by an arrow on the fan Economizer by disconnecting the 4 pin power connector housing. located at the base of the Economizer Control (ECA). -
Page 45: Units With Constant Cfm Direct Drive Indoor
Start-Up Units with Constant CFM Direct Drive Electro Mechanical Control: Using the Service Test Guide perform the proper test mode connections. Indoor Fan Once the supply fan has started, determine the total Much of the systems performance and reliability is closely system airflow (CFM) by (ReliaTel/Electromechanical): associated with, and dependent upon having the proper airflow supplied both to the space that is being... -
Page 46: Economizer Start-Up
Start-Up There are certain models however, if operated at low damper position to ensure proper ventilation based airflow, will not develop an airflow velocity that falls within upon the low fan speed minimum damper position set the required 500 to 4000 feet per minute range. For these Step models, the design airflow shall be greater than or equal 9. -
Page 47: Compressor Start-Up
Start-Up 3. Verify that the dampers stroked to the full open 5. To stop the SERVICE TEST, turn the main power position. disconnect switch to the “Off” position or proceed to the next component start-up procedure. Remove 4. To stop the SERVICE TEST, turn the main power electro mechanical test mode connections (if disconnect switch to the “Off”... -
Page 48: Final System Setup
Start-Up Electro Mechanical Control. Using the Service Test Guide (Table 9, p. 42) perform the proper test mode connections; 4. Verify that the heater stage is operating properly 5. To stop the SERVICE TEST, turn the main power disconnect switch to the “Off” position or proceed to the next component start-up procedure. -
Page 49: Maintenance
Maintenance Fan Belt Adjustment - Belt Drive Note: Actual belt deflection “force” must not exceed the maximum “force” value shown in Figure 53, p. Units 7. Recheck the belt tension at least twice during the first 2 to 3 days of operation. Belt tension may decrease until the new belts are “run in”... -
Page 50: Return Air Smoke Detector Maintenance
Maintenance Return Air Smoke Detector Maintenance system superheat. For guidelines, refer to the “Compressor Start-Up” section. Airflow through the unit is affected by the amount of dirt Important: Do not release refrigerant to the and debris accumulated on the indoor coil and filters. To atmosphere! If adding or removing insure that airflow through the unit is adequate for proper refrigerant is required, the service... -
Page 51: Annual Maintenance
Maintenance Microchannel (MCHE) Coils solution BUT DO NOT EXCEED 150ºF maximum to improve its cleansing capability. NOTICE: WARNING Coil Damage! Hazardous Pressures! DO NOT use any detergents with microchannel Coils contain refrigerant under pressure. When cleaning condenser coils. Use pressurized water or air ONLY, coils, maintain coil cleaning solution temperature under with pressure no greater than 600psi. -
Page 52: Final Process
Maintenance Final Process For future reference, you may find it helpful to record the unit data requested in the blanks provided. Complete Model Number: Unit Serial Number: Wiring Diagram Numbers (from unit control panel): Connections: Schematics: Table 13. Sample maintenance log Refrigerant Circuit #1 Refrigerant Circuit #2 Suct. -
Page 53: Troubleshooting
Troubleshooting ReliaTel™ Control operations for each mode, to assist in verifying proper operation. Make the necessary repairs and proceed to Step 7 Step The RTRM has the ability to provide the service personnel with some unit diagnostics and system status information. 7. -
Page 54: Cooling Failure
Troubleshooting Cooling Failure Cool Operating = approximately 32 VDC Cool Off = less than 1 VDC, approximately 0.75 VDC • Cooling and heating set point (slide pot) on the zone sensor has failed. Refer to the “Zone Sensor Test Cooling Failure = voltage alternates between 32 VDC & Procedure”... -
Page 55: Clogged Filter Switch
Troubleshooting The RTRM will ignore the closing of this Normally Open Table 14. Cooling setpoint and heating setpoint switch for 2 (±1) minutes. This helps prevent nuisance Nominal ZTEMP SERVICE LED indications. The exception is the LED will Zone Temperature Resistance flash 40 seconds after the fan is turned “On”... -
Page 56: Programmable & Digital Zone Sensor Test
Troubleshooting % RH WARNING Hazardous Voltage! 10.4 Disconnect all electric power, including remote 12.0 disconnects before servicing. Follow proper lockout/ 13.6 tagout procedures to ensure the power can not be 15.2 inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. 16.8 1. -
Page 57: Electro Mechanical Control
Troubleshooting Electro Mechanical Control 1. Using the “Test Mode” described in the “System Start- Up” section, put the unit into the economizer mode and verify that the economizer actuator (ECA) drives WARNING fully open (approximately 90 seconds). Live Electrical Components! 2. - Page 58 Troubleshooting Please follow steps sequentially unless directed differently in solution. Table 15. Troubleshooting for direct drive plenum fan Step Symptom or Test Probable Cause and Solution If obstruction is present, remove Obstruction blocking power from unit and remove operation of evaporator obstruction.
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Page 59: Unit Wiring Diagrams Numbers
Unit Wiring Diagrams Numbers Note: Wiring diagrams can be accessed using e-Library by entering the diagram number in the literature order number search field or by contacting technical support. Table 16. Unit wiring diagram numbers Schematic Type Drawing Number Description 4366-7216 THC(037-067) 4366-4568... - Page 60 Unit Wiring Diagrams Numbers Table 16. Unit wiring diagram numbers (continued) Schematic Type Drawing Number Description 4366-7336 THC(037) (230V) 4366-7338 THC(047-067) (230V) 4366-4559 T(S,H)C(036-060)E,F (1-Phase), ReliaTel Controls 4366-5182 THC(036-060)E,F (3-Phase), ReliaTel Controls, X13 IDM T(S,H)C(036-060)E,F (3-Phase), ReliaTel Controls, Belt-Drive 230V 4366-1509 4366-1541 T(S,H)C(072,090)F, ReliaTel Controls...
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Page 61: Limited Warranty
Tons for Residential Use* exclusion or limitation of incidental or consequential This limited warranty is extended by Trane to the original damages, so the above limitation or exclusion may not purchaser and to any succeeding owner of the real apply to you. -
Page 62: Electric Air Conditioner
Attention: Manager, Product Service Than 20 Tons for Commercial Use* GW-606-4800 This warranty is extended by Trane to the original * This warranty is for commercial usage of said equipment purchaser and to any succeeding owner of the real and not applicable when the equipment is used for a property to which the Combination Electric/ Electric Air residential application. - Page 64 The manufacturer has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. © 2012 Trane All rights reserved We are committed to using environmentally RT-SVX22J-EN 18 Jul 2012 conscious print practices that reduce waste.