Trane 4TWR4 Installation And Operation Manual

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Installer's manual (8 pages)

Use and care manual (8 pages)

Use and care manual (6 pages)

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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 AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-

door split systems are maximum efficiency, optimum performance and the best overall system reliability.

Section 1. Safety ..................................................................................... 2

Section 2. Unit Location Considerations ............................................. 4

Section 3. Unit Preparation .................................................................... 5

Section 4. Setting the Unit ..................................................................... 5

Section 5. Refrigerant Line Considerations ......................................... 5

Section 6. Refrigerant Line Routing ..................................................... 6

Section 7. Refrigerant Line Brazing ...................................................... 8

Section 8. Refrigerant Line Leak Check ............................................... 8

Section 9. Evacuation ............................................................................ 9

Section 10. Service Valves .................................................................... 9

Section 11. Electrical - Low Voltage ................................................... 10

Section 12. Electrical - High Voltage .................................................. 11

Section 13. Start Up .............................................................................. 12

Section 14. System Charge Adjustment ............................................. 12

Section 15. Checkout Procedures ...................................................... 16

Section 16. Defrost Control ................................................................. 17

Section 17. Troubleshooting ............................................................... 20

Section 18. Wiring Diagrams ............................................................... 22

Section 19. Pressure Curves ............................................................... 25

Section 20. Refrigerant Circuit ............................................................ 30

Installation and Operation Manual

Heat Pumps

4TWR4

18-BC95D1-5E-EN

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Summary of Contents for Trane 4TWR4

Page 1: Table Of Contents
18-BC95D1-5E-EN Installation and Operation Manual Heat Pumps 4TWR4 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 CAUTION This information is intended for use by individuals If using existing refrigerant lines make certain that all possessing adequate backgrounds of electrical and joints are brazed, not soldered. mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury CAUTION and/or property damage.
Page 3 CAUTION WARNING CONTAINS REFRIGERANT! BRAZING REQUIRED - IF USING MECHANICAL Failure to follow proper procedures can result in CONNECTIONS, ENSURE LEAK TEST IS NEGA- personal illness or injury or severe equipment TIVE! damage. Failure to inspect lines or use proper service tools System contains oil and refrigerant under high pres- may result in equipment damage or personal injury.
Page 4: 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) 4TWR4017N 29 x 26 x 29 4TWR4018N 33 x 30 x 33 4TWR4024N 33 x 30 x 33 4TWR4030N 29 x 30 x 33 4TWR4036N...
Page 5: 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 6: Section 6. Refrigerant Line Routing
5.3 Required Refrigerant Line Length Determine required line length and lift. You will need this later in STEP 2 of Section 14. Total Line Length = __________ Ft. Total Vertical Change (lift) = __________ Ft. Line Length 5.4 Refrigerant Line Insulation Important: The Vapor Line must always be insulated.
Page 7 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...
Page 8: 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 9: 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 10: 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 11: Section 12. Electrical - High Voltage
11.3 Defrost Control - 036 Model ONLY Defrost controls have a selectable termination temperature. As shipped, defrost will terminate at 47°F. For a higher termination temperature, cut Jumper J2 to achieve 70°F when at or below 30°F ambient. See Service Facts shipped in the outdoor unit for more information.
Page 12: Section 13. Start Up
12.2 High Voltage Disconnect Switch Install a separate disconnect switch at the outdoor unit. For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may create a noise problem within the structure. 12.3 High Voltage Ground Ground the outdoor unit per national, state, and local code requirements. Section 13.
Page 13 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. For 017N - 060N Models: 018N Models 017N Models...
Page 14 Special subcooling applications Outdoor Unit Model No. Indoor Unit Model No. Subcooling GAM5A0B18M11 4TWR4017N1 14 Degrees TAM7A0A24H21 4TWR4018N1 4A6H4018N1 TEM6A0C36H31 13 Degrees 4TWX5018N1 4TWR4024N1 4A6H4024N1 TEM6A0C36H31 13 Degrees 4TWX5024N1 4TWR4030N1 TEM6A0B24H21 14 Degrees STEP 3 - 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.
Page 15 STEP 7 - Stabilize the system. 1. Wait 20 minutes for the system condition to stabilize between adjustments. Note: When the Liquid Line Temperature and Gage Pressure approximately match the chart, the system is properly charged. 2. Remove gages. 3. Replace service port caps to prevent leaks. Tighten finger tight plus an additional 1/6 turn. STEP 8 - Verify typical performance.
Page 16: Section 15. Checkout Procedures
Calculating Charge Using the Weigh-In Method for the 3/8” liquid line STEP 1 - Measure in feet the distance between the 1. Total Line length (ft) – 10 ft ______________ outdoor unit and the indoor unit. (Include the entire length of the line from the service valve to the IDU.) 2.
Page 17: Section 16. Defrost Control
Section 16. Defrost Control Defrost Control The demand defrost control measures heat pump out- door ambient temperature with a sensor located outside the outdoor coil. A second sensor located on the outdoor coil is used to measure the coil temperature. The dif- ference between the ambient and the colder coil tem- perature is the difference or delta-T measurement.
Page 18 Table 1. Defrost Control Thermistor Table Table 2. DEMAND DEFROST QUICK SPECS THERMISTOR DEFROST ENABLED: TEMP °F TEMP °C RESISTANCE Volts DC ≤52 °F ≤52 °F Y = ON COIL TEM- (OHMS) PERATURE -15.00 -26.11 135976 2.50 DEFROST PERMIT: Y ≤32 °F ≤32 °F = ON COIL TEMPERA-...
Page 19 Timed Limp Mode. This will be accompanied DEFROST by a 1 flash. The DFC will initiate defrost after FAULT FAULT CONTROL 60 minutes of accumulated heating runtime DESCRIPTION CODES BEHAVIOR and force a defrost, which will terminate on coil temp. The limp mode will clear after the Hard Lock Out (can sensor fault is cleared.
Page 20: Section 17. Troubleshooting
Section 17. Troubleshooting Compressor fails to start Contactor check Is contactor engergized? Go To: Compressor won’t run (contacts closed) Wait 3 minutes and check contactor Check for 24 volts AC coil again across contactor coil Is voltage If applicable, is TDR present at Replace contactor input voltage...
Page 21 Does a resistance check show an open circuit between R and S? 18-BC95D1-5E-EN...
Page 22: Section 18. Wiring Diagrams
Section 18. Wiring Diagrams 18-BC95D1-5E-EN...
Page 23 18-BC95D1-5E-EN...
Page 24 18-BC95D1-5E-EN...
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 4TWR4018N1 TAM9A0B30V31 TAM9A0B30V31 Cooling @ 900 SCFM Heating @ 850 SCFM INDOOR ENTERING INDOOR ENTERING WET BULB CURVES DRY BULB CURVES TOP TO BOTTOM TOP TO BOTTOM 80, 70, 71, 67, 63 AND 59 DEG F. AND 60 DEG F. INDOOR ENTERING INDOOR ENTERING WET BULB CURVES...
Page 27 PRESSURE CURVES FOR 4TWR4030N1 TAM9A0B30V31DAB TAM9A0B30V31DAB Cooling @ 850 SCFM Heating @ 850 SCFM INDOOR ENTERING INDOOR ENTERING WET BULB CURVES DRY BULB CURVES TOP TO BOTTOM TOP TO BOTTOM 80, 70, 71, 67, 63 AND 59 DEG F. AND 60 DEG F. INDOOR ENTERING INDOOR ENTERING WET BULB CURVES...
Page 28 PRESSURE CURVES FOR 4TWR4042N1 TEM6A0C42H41 TEM6A0C42H41 Cooling @ 1250 SCFM Heating @ 1300 SCFM INDOOR ENTERING INDOOR ENTERING WET BULB CURVES DRY BULB CURVES TOP TO BOTTOM TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. 80, 70, AND 60 DEG F. INDOOR ENTERING INDOOR ENTERING WET BULB CURVES...
Page 29 PRESSURE CURVES FOR 4TWR4060N1 TEM6A0D60H51 TEM6A0D60H51 Cooling @ 1450 SCFM Heating @ 1550 SCFM INDOOR ENTERING INDOOR ENTERING WET BULB CURVES DRY BULB CURVES TOP TO BOTTOM TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. 80, 70, AND 60 DEG F. INDOOR ENTERING INDOOR ENTERING WET BULB CURVES...
Page 30: Section 20. Refrigerant Circuit
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.

This manual is also suitable for:

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Trane 4TWR4 Installation And Operation Manual

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