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 .................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 6
Section 6. Refrigerant Line Routing ..................................................... 7
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................. 10
Section 9. Evacuation ........................................................................... 11
Section 10. Service Valves ................................................................... 11
Section 11. Electrical - Low Voltage .................................................... 12
Section 12. Electrical - High Voltage ................................................... 17
Section 13. Start Up .............................................................................. 18
Section 14. System Charge Adjustment ............................................. 19
Section 15. Checkout Procedures and Troubleshooting ................... 30
Installer's Guide
Air Conditioner/Heat Pumps
4TTZ0/4TWZ0 with ComfortLink
18-BC53D2-6
II and Charge Assist
TM
TM
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Table of Contents
Troubleshooting
Related Manuals for Trane 4TTZ0
Summary of Contents for Trane 4TTZ0
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Page 1: Table Of Contents
18-BC53D2-6 Installer’s Guide Air Conditioner/Heat Pumps 4TTZ0/4TWZ0 with ComfortLink II and Charge Assist 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) 4TTZ0024A 54 x 34 x 37 4TTZ0036B 54 x 34 x 37 4TTZ0048A/B 54 x 34 x 37 4TTZ0060A 54 x 34 x 37 4TWZ0024A... - Page 4 2.3 Suggested Locations for Best Reliability Ensure the top discharge area is unrestricted for Avoid Install at least five (5) feet above the unit. Near Bedrooms Three (3) feet clearance must be provided in front of the control box (access panels) and any Min 5’...
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Page 5: Section 3. Unit Preparation
2.5 Coastal Considerations If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup- plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time. Section 3. Unit Preparation 3.1 Prepare The Unit For Installation STEP 1 - Check for damage and report prompt- ly to the carrier any damage found to the unit. -
Page 6: Section 5. Refrigerant Line Considerations
4TWZ0060A 5.2 Factory Charge Trane outdoor condensing units are factory charged with the system charge required for the outdoor condens- ing unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. See unit nameplate. If connecting line length exceeds fifteen (15) feet and/or a larger indoor evaporative coil is installed, then final refrigerant charge adjustment is necessary. -
Page 7: 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 8: Section 7. Refrigerant Line Brazing
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... - Page 9 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. STEP 4 - Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitrogen purge.
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Page 10: Section 8. Refrigerant Line Leak Check
STEP 5 - Replace the pressure tap valve cores after the service valves have cooled. Section 8. Refrigerant Line Leak Check 8.1 Check For Leaks STEP 1 - Pressurize the refrigerant lines and 150 PSIG evaporator coil to 150 PSIG using dry nitrogen. STEP 2 - Check for leaks by using a soapy solu- tion or bubbles at each brazed location. -
Page 11: 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. 0350 Microns STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump. -
Page 12: Section 11. Electrical - Low Voltage
10.1 Open the Liquid Service Valve WARNING Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn counterclockwise until the valve stem just touches the rolled edge. No torque is required. Unit Side 3/16” Hex Wrench Failure to follow this warning will result in abrupt of Service release of system charge and may result in Valve... -
Page 13: Field Wiring
11.2 Low Voltage Hook-up Diagrams Communicating Outdoor Unit Fully Communicating System Neatly bundle all low voltage wires behind the service valve cover as shown. TAM8 Communicating Air Handler Communicating Brown Comfort Control Blue Note 1 Brown D - Note 2 Blue B - Blue Notes:... - Page 14 Air Conditioner or Heat Pump - Note 4 TAM7 Air Handler with 24 Volt Control Hook-up Diagram Neatly bundle all low voltage wires behind the service valve cover as shown. Note 5 Black TAM7 Air Handler (X2) 24 Volt Yellow Comfort Control Yellow/Red W3 *...
- Page 15 1. See User Interface setup menu for 24 VAC control mode and cooling CFM options. 2. First stage CFM for 4TTZ0 and 4TWZ0 equals 50%. 3. For furnace+heat pump applications, comfort control must be dual fuel capable or use accessory TAYPLUS103A.
- Page 16 11.3 Defrost Control (Heat Pump only) The demand defrost control measures heat pump outdoor ambient temperature with a sen- sor located outside the outdoor coil. A second OUTDOOR CONTROL sensor located on the outdoor coil is used to BOARD – PIN measure the coil temperature.
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Page 17: 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 18: 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. DONE CANCEL 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 acces- sory is used and the Outdoor Ambient is below... -
Page 19: Section 14. System Charge Adjustment
Section 14. System Charge Adjustment 14.1 Temperature Measurements STEP 1 - Check the outdoor temperatures. 120º F See Section 14.2 for Subcooling (in cooling mode) is the only recom- Outdoor mended method of charging above 55º F ambi- ent outdoor temperature. See Section 14.2. Temperatures 55º... -
Page 20: Control Board
STEP 2 - Using the total Line Length and Lift measured in STEP 1 and the subcool charging table corrections below, determine the Dip Switch position for your model. SUBCOOL CHARGING TABLE CORRECTIONS SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE TABLE A TABLE B 4TEE3_03 Air Handler Downflow &... - Page 21 14.3 Determine the charge adjustment procedure Final refrigerant charge adjustment is necessary. Choose the appropriate method below. • Charge Assist procedure in Section 14.4 • Manual charging procedure in Section 14.5 14.4 Charge Assist Procedure NOTE: Outdoor Temperature (ODT) must be OUTDOOR CONTROL BOARD –...
- Page 22 14.5 Manual Charging Procedure in Cooling between 55°F and 120°F OD Ambient NOTE: Outdoor Temperature (ODT) must be between 55°F and 120°F. See Section 14.1 IMPORTANT: Be sure to set Dip Switches on the Outdoor Control Board for Line Length and Lift.
- Page 23 Use the liquid line temperature and liquid line gage pressure from Step 2, along with the Dip 3 TON AC R410A REFRIGERANT CHARGING CHART Switch setting column, to determine the proper LIQUID GAGE PRESSURE (PSIG) Liquid Gage Pressure. ONLY DIPSWITCH ONLY DIPSWITCH ONLY DIPSWITCH 1 ON...
- Page 24 2 TON AC R410A REFRIGERANT CHARGING CHART 2 TON HP R410A REFRIGERANT CHARGING CHART LIQUID GAGE PRESSURE (PSIG) LIQUID GAGE PRESSURE (PSIG) ONLY DIPSWITCH ONLY DIPSWITCH ONLY DIPSWITCH ONLY DIPSWITCH ONLY DIPSWITCH ONLY DIPSWITCH 1 ON 2 ON 3 ON 1 ON 2 ON 3 ON...
- Page 25 STEP 5 - Adjust refrigerant level to attain proper gage pressure. Add refrigerant if the Liquid Gage Pressure is lower than the chart value. 1. Connect gages to refrigerant bottle and unit as illustrated. 2. Purge all hoses. 3. Open bottle. 4.
- Page 26 STEP 8 - Record System Information for reference. Record system pressures and temperatures after charging is complete. Outdoor model number = _________________ Measured Suction Line Temp = __________ º F Liquid Gage Pressure = __________ PSIG Measured Outdoor Ambient = __________ º F Suction Gage Pressure = __________ PSIG Measured Indoor Ambient = __________ º...
- Page 27 36 °F STEP 3 - Measure the suction line pressure and temperature at the “true” suction line and record the values below. NOTE: the side service panel will need to be removed to gain access to this area. Attach temperature probe and the gage as shown.
- Page 28 Table 13.2 STEP 4 - Use the measured values from Step 3 to determine a target superheat of 15 degrees. 15 degree Superheat Chart Suction Line Suction Gage Temp Pressure Example: Assume a suction pressure of 81 PSIG and a suction temperature of 36º F. When the suction temperature is in line with the suction gage pressure, the target superheat value will be 15 degrees.
- Page 29 STEP 6 - Stabilization and completion. 1. Wait 20 minutes for the system condi- tion to stabilize between adjustments. 20 MIN. NOTE: When the suction temperature is in line with the suction gage pressure, the target super- heat value will be 15 degrees. 2.
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Page 30: Section 15. Checkout Procedures And Troubleshooting
Section 15. Checkout Procedures and Troubleshooting 15.1 Operational And Checkout Procedures Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units must be operated and charge adjustments made. Important: Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust tubing if nec- essary so tubes do not rub against each other when the unit runs. -
Page 31: Troubleshooting
15.2 Troubleshooting SYSTEM FAULTS REFRIGERANT CIRCUIT Head Pressure Too High Head Pressure Too Low Suction Pressure Too High Suction Pressure Too Low Liquid Refrig. Floodback (TXV/EEV) Liquid Refrig. Floodback (Cap. Tube) I.D. Coil Frosting Compressor Runs Inadequate or No Cooling/Htg ELECTRICAL Compressor &... - Page 32 The manufacturer has a policy of continuous product and product data improvement and it reserves the right to change design and specifications without notice. 6200 Troup Highway Representative-only illustrations included in this document. Tyler, TX 75707 www.trane.com © 2011 Trane 09/11 18-BC53D2-6...