Table of Contents
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ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT - This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser's purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture's split
systems are A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and
outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation .................................................................... 4
Section 4. Setting the Unit ..................................................................... 4
Section 5. Refrigerant Line Considerations ......................................... 4
Section 6. Refrigerant Line Routing ..................................................... 5
Section 7. Refrigerant Line Brazing ...................................................... 7
Section 8. Refrigerant Line Leak Check ............................................... 7
Section 9. Evacuation ............................................................................ 8
Section 10. Service Valves .................................................................... 8
Section 11. Electrical - Low Voltage ..................................................... 9
Section 12. Electrical - High Voltage .................................................. 10
Section 13. Start Up .............................................................................. 10
Section 14. System Charge Adjustment ............................................. 10
Section 15. Checkout Procedures ...................................................... 14
Section 16. Defrost Control ................................................................. 15
Section 17. Troubleshooting ............................................................... 20
Section 18. Wiring Diagrams ............................................................... 22
Section 19. Pressure Curves ............................................................... 25
Section 20. Refrigerant Circuit (only for reference) .......................... 28
Installation and Operation Manual
Heat Pumps
4TWR6
18-AC104D1-1G-EN
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Summary of Contents for Trane 4TWR6 Series
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Page 1: Table Of Contents
18-AC104D1-1G-EN Installation and Operation Manual Heat Pumps 4TWR6 ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES IMPORTANT – This Document is customer property and is to remain with this unit. Please return to service informa- tion pack upon completion of work. -
Page 2: Section 1. Safety
Section 1. Safety WARNING WARNING LIVE ELECTRICAL COMPONENTS! This information is intended for use by individuals During installation, testing, servicing, and trouble- possessing adequate backgrounds of electrical and shooting of this product, it may be necessary to work mechanical experience. Any attempt to repair a central with live electrical components. -
Page 3: Section 2. Unit Location Considerations
Section 2. Unit Location Considerations 2.1 Unit Dimensions and Weight Table 2.1 Unit Dimensions and Weight Models H x D x W (in) Weight* (lb) 4TWR6024N 41 x 34 x 37 4TWR6036N 45 x 34 x 37 4TWR6048N 45 x 34 x 37 4TWR6060N 45 x 34 x 37 * Weight values are estimated. -
Page 4: Section 3. Unit Preparation
2.4 Cold Climate Considerations NOTE: It is recommended that these precautions be taken for units being installed in areas where snow accumula- tion and prolonged below freezing temperatures occur. • Units should be elevated 3-12 inches above the pad or roof top, depending on local weather. This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. -
Page 5: Section 6. Refrigerant Line Routing
5.2 Factory Charge The outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify proper system charge via subcooling (TXV/EEV) or superheat (fixed orifice) per the unit nameplate. 5.3 Required Refrigerant Line Length Determine required line length and lift. - Page 6 8 Feet Maximum Joist/Rafter Isolator Side View 8 Feet Maximum Line Set Secure Vapor line from joists using isolators every 8 ft. Secure Liquid Line directly to Vapor line using tape, wire, or other appro- priate method every 8 ft. Isolation From Joist/Rafter 8 Feet Maximum Wall...
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Page 7: Section 7. Refrigerant Line Brazing
Section 7. Refrigerant Line Brazing 7.1 Braze The Refrigerant Lines STEP 1 - Remove caps or plugs. Use a deburing tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth. STEP 2 - Remove the pressure tap cap and valve cores from both service valves. STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen. -
Page 8: Section 9. Evacuation
Section 9. Evacuation 9.1 Evacuate the Refrigerant Lines and Indoor Coil Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation are complete. STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump. -
Page 9: Section 11. Electrical - Low Voltage
Section 11. Electrical - Low Voltage 11.1 Low Voltage Maximum Wire Length Table 11.1 Table 11.1 defines the maximum total length of low voltage wiring from the outdoor unit, to the 24 VOLTS indoor unit, and to the thermostat. WIRE SIZE MAX. -
Page 10: Section 12. Electrical - High Voltage
Section 12. Electrical - High Voltage 12.1 High Voltage Power Supply WARNING LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshooting of this product, it may be nec- essary to work with live electrical components. Failure to follow all electrical safety precau- tions when exposed to live electrical compo- nents could result in death or serious injury. - Page 11 14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.) STEP 1 - Use the refrigerant line total length and lift measurements from Section 5.3. Total Line Length = __________ Ft. LIFT Vertical Change (Lift) = __________ Ft. STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 024N Models 036N Models SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
- Page 12 Table 14.2 R-410A REFRIGERANT CHARGING CHART FINAL SUBCOOLING ( ° LIQUID TEMP ° LIQUID GAGE PRESSURE (PSI) 179 182 185 188 191 195 198 195 198 201 204 208 211 215 211 215 218 222 225 229 232 107 °F 229 232 236 240 243 247 251 247 251 255 259 263 267 271 267 271 275 279 283 287 291...
- Page 13 STEP 9 - Record System Information for refer- ence. Record system pressures and temperatures after charging is complete. Measured Suction Line Temp = __________ º F Outdoor model number = _________________ Liquid Gage Pressure = __________ PSIG Measured Outdoor Ambient = __________ º F Measured Indoor Ambient = __________ º...
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Page 14: Section 15. Checkout Procedures
STEP 2 - Stabilize the system by operating for a minimum of 20 minutes. At startup, or whenever charge is removed or added, the system must be operated for a minimum of 20 minutes to stabilize before accurate measurements can be made. STEP 3 - Check the liquid line temperature and liquid gage pressure to obtain a minimum of 10º... -
Page 15: Section 16. Defrost Control
Section 16. Defrost Control Pin Identification The demand defrost control measures heat pump out- door ambient temperature with a sensor located outside 1. TEST_COMMON (Shorting any of the other pins to the outdoor coil. A second sensor located on the outdoor this pin causes the function of the other pin to be coil is used to measure the coil temperature. - Page 16 EEV CONTROL BOARD TEST POINTS To Coil on Test Pins OPEN CLOSE TEST OPEN STATUS LED CLOSE (Green) Fault LED (Red) See Table 2 Suction Line Pressure Transducer Input See Table 1 Suction Line See Table 3 DC V TEST Temperature Control Input Sensor Input...
- Page 17 TABLE 1 TABLE 2 Suction Line Temperature Sensor - J10 Suction Line Pressure Transducer - J7 THERMISTOR Volts DC at Plug J10 Voltage to pressure reference Chart Temp °F Temp °C RESISTANCE (pin to pin) (OHMS) Pressure Volts DC at plug J7 -17.8 83247 3.87...
- Page 18 ELECTRONIC EXPANSION VALVE (EEV) CONTROL BOARD Status LED (Green) On - Control has power OPEN STATUS LED Flashing Fast - Control is driving valve (5 seconds max drive (Green) CLOSE time) Fault LED Flashing Pattern - See Table 6. (Red) TABLE 3 Control Input and Status LED - J6 EEV control...
- Page 19 TROUBLESHOOTING THE EEV The Electronic Expansion Valve (EEV) installed in this heat pump is designed to control superheat entering the compressor when the system is running in mechanical heating mode. During cooling mode, refrigerant flow reverses through the outdoor EEV and superheat is controlled by the expansion device in the indoor unit.
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Page 20: Section 17. Troubleshooting
Section 17. Troubleshooting Compressor fails to start Contactor check Is contactor Go To: Compressor won’t run energized? (contacts closed) Check for 24 volts AC across contactor coil Is voltage present at Replace contactor contactor coil? Check control transformer and control fuse Jumper R to Y low Is the control Does the... - Page 21 Compressor won’t run Contactor is closed Check for high voltage to contactor Check for open IOL Is high voltage present (Internal Overload) at T1 and T2 ? Check resistance of C to S and C to R Does the Check power resistance check Allow compressor supply from...
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Page 22: Section 18. Wiring Diagrams
Section 18. Wiring Diagrams 18-AC104D1-1G-EN... - Page 23 18-AC104D1-1G-EN...
- Page 24 18-AC104D1-1G-EN...
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Page 25: Section 19. Pressure Curves
Section 19. Pressure Curves COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F. TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABILIZE. MEASURE INDOOR WET BULB TEMPERATURE, OUTDOOR TEMPERATURE, DISCHARGE AND SUCTION PRESSURES. ON THE PLOTS LOCATE OUTDOOR TEMPERATURE (1); LOCATE INDOOR WET BULB (2);... - Page 26 PRESSURE CURVES FOR 4TWR6036N1 TAM7A0C36H31 TAM7A0C36H31 Cooling with Expansion Valve Cooling with Expansion Valve Heating with Expansion Valve Heating with Expansion Valve INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
- Page 27 PRESSURE CURVES FOR 4TWR6060N1 TAM7B0C60H51 TAM7B0C60H51 Cooling with Expansion Valve Heating with Expansion Valve INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. 80, 70, AND 60 DEG F. 2ND STAGE 1ST STAGE 2ND STAGE...
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Page 28: Section 20. Refrigerant Circuit (Only For Reference)
Trane has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.
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Do you have a question about the 4TWR6 Series and is the answer not in the manual?
Questions and answers
My installer has copper tubing not connected to anything in the outside of unit it runs across the concrete. I would like a photo of a completed unit and what it should look like. Also the furnace units ( I have 2) both have wires hanging outside the unit! The new units installed are XR 4TWR6048N100AA. This is not what a completely installed unit should look like. I do not think wires should be hanging outside the metal coverings of the unit.
A properly installed Trane 4TWR6 Series unit should meet the following conditions:
1. Unit Position and Support:
- The unit must be level and securely fastened.
- If mounted on a roof, the roof must support the unit’s weight.
- Vibration isolation is recommended to reduce noise transfer.
2. Copper Tubing (Refrigerant Lines):
- Maximum total line length: 150 feet.
- Maximum vertical rise: 50 feet.
- Service valve sizes must match those specified in the manual.
- For lines over 50 feet, follow guidelines from the Refrigerant Piping Application Guide.
3. Electrical Wiring:
- Power supply must match the nameplate rating.
- Follow all national, state, and local electrical codes.
- A separate high-voltage disconnect switch must be installed at the outdoor unit.
- Flexible electrical conduit is recommended to prevent noise from vibration.
- Grounding must be done per code requirements.
4. Live Components and Safety:
- Disconnect power and discharge capacitors before servicing.
- Follow the wiring diagram inside the control box cover.
The system should be matched with an approved indoor unit for best performance, efficiency, and reliability.
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My unit short cycles on and off several times at start up during the heating mode is that because the system is low on refrigerant charge?
Yes, based on the context, a Trane 4TWR6 Series unit may short cycle on and off during startup in heating mode if the system is very low on refrigerant charge. This is suggested under the troubleshooting section where low refrigerant charge is identified as a possible issue affecting performance.
This answer is automatically generated