Trane Technologies 4TTR7 Installer's Manual
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Trane Technologies 4TTR7 Installer's Manual

Condensing units
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Installer's Guide
Condensing Units
4TTR7
4TTR7048B
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 pre-
cautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
March 2020
Note: "Graphics in this document are for representation only.
SAFETY WARNING
18-AC115D1-1B-EN
Actual model may differ in appearance."

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  • Page 1 Installer’s Guide Condensing Units 4TTR7 4TTR7048B Note: “Graphics in this document are for representation only. Actual model may differ in appearance.” 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: Table Of Contents

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

  • 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) 4TTR7048B 45 x 34 x 37 * Weight values are estimated. When mounting the outdoor unit on a roof, be sure the roof will support the unit’s weight.
  • 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 other side requiring service.

  • 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 supplied 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

    Section 5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes Table 5.1 Line Sizes Service Valve Connection Sizes Max Line & Lift Lengths RATED LINE SIZES Vapor Liquid Vapor Line Liquid Line TOTAL Max Max Lift (ft.) Line Line Connection...
  • Page 7 5.4 Refrigerant Line Insulation Important: The Vapor Line must always be insulated. DO NOT allow the Liquid Line and Vapor Line Vapor Line to come in direct (metal to metal) Liquid Line contact. Insulation 5.5 Reuse Existing Refrigerant Lines CAUTION If using existing refrigerant lines make certain that all joints are brazed, not soldered.

  • Page 8: Section 6. Refrigerant Line Routing

    Section 6. Refrigerant Line Routing 6.1 Precautions Important: Take precautions to prevent noise Comply with National, State, and Local Codes when within the building structure due to vibration isolating line sets from joists, rafters, walls, or other transmission from the refrigerant lines. structural elements.

  • Page 9: Section 7. Refrigerant Line Brazing

    Wall Sealant Ductwork Insulation Vapor Line Isolator Line Set Isolation Through Wall DO NOT hang line sets from ductwork Section 7. Refrigerant Line Brazing 7.1 Braze The Refrigerant Lines STEP 1 - Remove caps or plugs. Use a debur- ing tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth.
  • Page 10 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. Braze the refrigerant lines to the service valves. For units shipped with a field-installed external drier, check liquid line filter drier’s directional flow arrow to confirm correct direction of refrigeration...

  • Page 11: Section 8. Refrigerant Line Leak Check

    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 solution or bubbles at each brazed location. Remove nitrogren pressure and repair any leaks before continuing.

  • Page 12: Section 10. Service Valves

    STEP 2 - Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute. 1 MIN. Once evacuation is complete blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set.

  • Page 13: 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 14 11.2 Low Voltage Hook-up Diagrams With TEM 6 With TAM 7 Outdoor Outdoor Thermostat Air Handler Thermostat Air Handler Unit Unit 24 VAC HOT 24 VAC HOT 24 VAC 24 VAC Common Common Blue Blue COOL/HEAT COOL/HEAT 1st STAGE 1st STAGE COOL/HEAT 1st STAGE HEATING...

  • Page 15: Section 12. Electrical - High Voltage

    With Variable Speed S-Series Furnace Outdoor Thermostat Furnace Unit NOTES: 1) For PWM (BK) enabled thermostats, cut the BK jumper on 24 VAC HOT the IFC and connect wiring. 2) The factory Y1-O jumper must remain in place for proper LED read out in cooling mode.

  • Page 16: Section 13. Start Up

    12.3 High Voltage Ground Ground the outdoor unit per national, state, and local code requirements. 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...

  • Page 17: 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 18 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 4 Ton AC SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 1° Add 4° 1° Add 2° Add 1°...
  • Page 19 STEP 5 - Use the final subcooling value, refriger- Table 14.2 ant temperature and pressure from STEP 4, to R-410A REFRIGERANT CHARGING CHART determine the proper liquid gage pressure using Table 14.2. FINAL SUBCOOLING ( ° LIQUID TEMP ° LIQUID GAGE PRESSURE (PSI) 179 182 185 188 191 195 198 Example: Assume a 12º...
  • Page 20 STEP 7 - Stabilize the system. 1. Wait 20 minutes for the system condi- tion to stabilize between adjustments. 20 MIN. Note: When the Liquid Line Temperature and Gage Pressure approximately match the chart, the system is properly charged. 2. Remove gages. 3.
  • Page 21 14.3 Subcooling Charging Below 55º F Outdoor Temp. 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. STEP 1 - Determine additional charge.

  • Page 22: Section 15. Checkout Procedures And Troubleshooting

    STEP 3 - Check the liquid line temperature and liquid gage pressure to obtain a minimum of 10º subcooling in heating mode. Measured Liquid Line Temp = __________ º F Liquid Gage Pressure = __________ PSIG STEP 4 - Add charge if a minimum of 10º sub- cooling is not obtained with the namplate charge plus additional charge previously added.
  • Page 23 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 24 Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or tranetechnologies.com. 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.

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