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 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.
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 ......................................... 5
Section 6. Refrigerant Line Routing ..................................................... 6
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................... 9
Section 9. Evacuation and Servicing .................................................... 9
Section 10. Service Valves ................................................................... 10
Section 11. Electrical - Low Voltage ................................................... 11
Section 12. Electrical - High Voltage .................................................. 13
Section 13. Start Up .............................................................................. 14
Section 14. System Charge Adjustment ............................................. 14
Section 15. Checkout Procedures ....................................................... 18
Section 16. Defrost Control ................................................................. 19
Section 17. Troubleshooting ................................................................ 22
Section 18. Wiring Diagrams ............................................................... 24
Section 19. Pressure Curves ............................................................... 27
Section 20. Refrigerant Circuit (only for reference)........................... 31
Installation and Operation Manual
Heat Pumps
5TWX5
18-BC119D1-1A-EN
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Summary of Contents for Trane 5TWX5
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Page 1: Table Of Contents
18-BC119D1-1A-EN Installation and Operation Manual Heat Pumps 5TWX5 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 CAUTION CONTAINS REFRIGERANT! NOTE: R454B refrigerant is a blend and should only be added to the system in liquid form. Failure to follow proper procedures can result in personal illness or injury or severe equipment WARNING damage. System contains oil and refrigerant under high HAZARDOUS VOLTAGE! pressure. -
Page 3: Section 2. Unit Location Considerations
Section 2. Unit Location Considerations 2.1 Piping Guidelines Piping material, pipe routing, and installation shall include protection from physical damage in operation and service, and be in compliance with national and local codes and standards. All field joints shall be accessible for inspection prior to being covered or enclosed. -
Page 4: Section 3. Unit Preparation
2.4 Suggested Locations for Best Reliability Ensure the top discharge area is unrestricted for at least Avoid Install Near Bedrooms five (5) feet above the unit. Three (3) feet clearance must be provided in front of the control box (access panels) and any other side requiring service. -
Page 5: Section 5. Refrigerant Line Considerations
Section 5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes Table 5.1 Line Sizes Service Valve Connection Sizes Vapor Liquid Vapor Line Liquid Line Model Line Line Connection Connection 5TWX5018A 5/16 5/16 5TWX5024A 5/16 5/16 5TWX5030A 5/16 5/16 5TWX5036A 5/16... -
Page 6: Section 6. Refrigerant Line Routing
5.5 Reuse Existing Refrigerant Lines CAUTION If using existing refrigerant lines make certain that all joints are brazed, not soldered. For retrofit applications, where the existing indoor evaporator coil and/or refrigerant lines will be used, the following precautions should be taken: •... - Page 7 8 Feet Maximum Wall Isolator Line Set 8 Feet Maximum Side View Secure Vapor Line using isolators every 8 ft. Secure Liquid Line directly to Vapor Line using tape, wire, or other appropriate method every 8 ft. Isolation In Wall Spaces Wall Sealant Ductwork...
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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 8. Refrigerant Line Leak Check
Section 8. Refrigerant Line Leak Check 8.1 Check For Leaks STEP 1 - Pressurize the refrigerant lines and 600 PSIG evaporator coil to 600 PSIG using dry nitrogen. STEP 2 - Check for leaks by using a soapy solution or bubbles at each brazed location. Note: Remove nitrogen pressure and repair any leaks before continuing. -
Page 10: Section 10. Service Valves
Under no circumstances shall potential sources of ignotion be used in the searching for or detection of refrigerant leaks. The following leak detection methods are deemed acceptable for all refrigerant systems: • Electronic leak detectors calibrated for R454B • Bubble method •... -
Page 11: Section 11. Electrical - Low Voltage
1/4 TURN ONLY COUNTERCLOCKWISE FOR FULL OPEN Unit Side POSITION of Service 3/16” Hex Wrench Valve Rolled Edge to VALVE STEM Captivate Stem Hex Headed UNIT SIDE Valve System OF VALVE PRESSURE TAP PORT Service Port GAS LINE CONNECTION Gas Service Valve Mitigation Board Guidelines •... - Page 12 11.3 Defrost Control - All Models except 036 Defrost controls have a selectable termination Defrost Board Detail temperature. As shipped, defrost will terminate at 47°F. For a higher termination temperature, cut Jumper J2 to achieve 70°F. See Service Facts shipped in the outdoor unit for more information. Pin Identification on J5 (See Illustration) 1.
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Page 13: 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 14: Section 13. Start Up
Section 13. Start Up 13.1 System Start Up STEP 1 - Ensure Sections 7 through 12 have been completed. STEP 2 - Set System Thermostat to OFF. STEP 3 - Turn on disconnect(s) to apply power to the indoor and outdoor units. STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater accessory is used and the Outdoor Ambient is below 70ºF. - Page 15 STEP 2 - Determine the final subcooling value using R-454B REFRIGERANT CHARGING CHART total Line Length and Lift measured in STEP 1 and ° DESIGN SUBCOOLING ( the charts below. LIQUID TEMP For 018A - 060A Models: ( ° F) 018N Models LIQUID GAGE PRESSURE (PSI) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
- Page 16 14.3 Charging the Unit STEP 1 - Attain Proper Gage Pressure. Using the Standard R-454B Subcool Charging Chart, adjust refrigerant level to attain proper gage pressure. Note: Use bubble point, per the included chart, for calculating subcooling. Add refrigerant in the Liquid Gage Pressure is lower than the chart value.
- Page 17 14.3 Subcooling Charging Below 55º F Outdoor Temp. (In Heating Only) The Subcooling Charging method in cooling is not recommended below 55º F outdoor temperature. The recommended method of charging at outdoor temperatures below 55º F is weighing in the charge. Return when weather conditions permit charge verification through subcooling.
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Page 18: Section 15. Checkout Procedures
STEP 5 - Complete the ‘Total System Charge’ charge rating label below and label located on the outside of the unit with a permanent marker. Note: Complete the ‘Total System Charge’ chart when fi nal charging is complete. a. Charge added at Factory = ___________ lb/oz b. -
Page 19: 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 20 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 21 Timed Limp Mode. This will be accompanied DEFROST by a 1 flash. The DFC will initiate defrost after FAULT FAULT CONTROL DESCRIPTION 60 minutes of accumulated heating runtime 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.
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Page 22: 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 23 Does a resistance check show an open circuit between R and S? 18-BC119D1-1A-EN...
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Page 24: Section 18. Wiring Diagrams
Section 18. Wiring Diagrams 18-BC119D1-1A-EN... - Page 25 18-BC119D1-1A-EN...
- Page 26 18-BC119D1-1A-EN...
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Page 27: 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 28 PRESSURE CURVES for 5TWX5024A1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) Cooling @SCFM OD Model 5TWX5024A1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) PRESSURE CURVES for 5TWX5030A1 INDOOR ENTERING...
- Page 29 PRESSURE CURVES for 5TWX5036A1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) OD Model Cooling @SCFM 5TWX5036A1 1100 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) PRESSURE CURVES for 5TWX5042A1 INDOOR ENTERING...
- Page 30 PRESSURE CURVES for 5TWX5048A1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) OD Model Cooling @SCFM 5TWX5048A1 1500 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. OUTDOOR TEMPERATURE (Degree F) PRESSURE CURVES for 5TWX5060A1 INDOOR ENTERING...
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Page 31: Section 20. Refrigerant Circuit (Only For Reference)
Section 20. Refrigerant Circuit (only for reference) Heating Refrigeration Cycle Cooling Refrigeration Cycle Printed from D159360 18-BC119D1-1A-EN... - Page 32 The AHRI Certified mark indicates Trane U.S. Inc. participation in the AHRI Certification program. For verification of individual certified products, go to ahridirectory.org. 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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