Trane 4TTM3018 Installer's Manual
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Trane 4TTM3018 Installer's Manual

Trane 4TTM3018 Installer's Manual

Condensing units
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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 information
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 in-
stallation. 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 manufac-
turer's split systems are A.H.R.I. rated only with TXV 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

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Installer's Guide
Condensing Units
4TTM3018 through 4TTM3060
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18-AC78D1-6
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Summary of Contents for Trane 4TTM3018

  • Page 1: Table Of Contents

    18-AC78D1-6 Installer’s Guide Condensing Units 4TTM3018 through 4TTM3060 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 information 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 mechanical experience. Any attempt to repair a cen- work with live electrical components.

  • Page 3: Section 2. Unit Location Considerations

    2.1 Unit Dimensions and Weight Unit Dimensions and Weight Models H x D x W Weight* 4TTM3018-036 28-7/8 x 23-1/2 x 25-1/2 4TTM3042-060 28-7/8 x 28-1/2 x 29-1/4 * Weight values are estimated. When mounting the outdoor unit on a roof, be sure the roof will support the unit’s weight.
  • Page 4 2.4 Location Restrictions Avoid Install Ensure the top discharge area is unrestricted for Near Bedrooms at least five (5) feet above the unit. Clearance must be provided in front of the control box (access panels) and any other side Min 5’ Unrestricted requiring service.

  • Page 5: Section 3. Unit Preparation

    Section 3. Unit Preparation 3.1 Prepare The Unit For Installation STEP 1 - Check for damage and report promptly to the carrier any damage found to the unit. The charge port can be used to check to be sure the refrigerant charge has been retained during shipment.

  • 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 Vapor Liquid Vapor Line Liquid Line Model Line Line Connection Connection 4TTM3018A 4TTM3024A 4TTM3030A 4TTM3036A 4TTM3042A 4TTM3048A 4TTM3060A 5.2 Required Refrigerant Line Length Determine required line length.

  • Page 7: Section 6. Refrigerant Line Routing

    5.4 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 refrigerant lines will be used, the following precautions should be taken: • Ensure that the refrigerant lines are the correct size.

  • 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.

  • Page 10: Section 8. Refrigerant Line Leak Check

    STEP 5 - Replace the pressure tap valve cores and caps after the service valves have cooled. Section 8. Refrigerant Line Leak Check 8.1 Check For Leaks STEP 1 - Pressurize the refrigerant lines and evapo- 150 PSIG rator coil to 150 PSIG using dry nitrogen. STEP 2 - Check for leaks by using a soapy solution 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

    Section 11. Electrical - Low Voltage 11.1 Low Voltage Maximum Wire Length Table 11.1 defines the maximum total length of low Table 11.1 voltage wiring from the outdoor unit, to the indoor 24 VOLTS unit, and to the thermostat. WIRE SIZE MAX.
  • Page 13 1 or 2 Stage Gas Furnace Hook-up Diagram Low Voltage connection must be made inside the outdoor unit case. Yellow 1 or 2 Stage Gas Furnace Comfort Control Blue Yellow Yellow Y - Yellow Green Green White White Air Conditioner Black Black W2* Blue...

  • Page 14: 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 trouble- shooting of this product, it may be necessary to work with live electrical components. Failure to fol- low all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

  • Page 15: Section 13. Start Up

    Section 13. Start Up 13.1 System Start Up STEP 1 - Ensure Sections 7, 8, 9, 10, 11, 12, and 13 have been completed. STEP 2 - Set System Thermostat to OFF. DONE CANCEL STEP 3 - Turn on disconnect to apply power to the indoor and outdoor units.

  • Page 16: Section 14. System Charge Adjustment

    Section 14. System Charge Adjustment 14.1 Charge Adjustment For Independent Charge Verification, please see Section 16. This system cannot be appropriately charged by subcooling. This new charging procedure helps prevent over charging. It is important to follow these instructions. You will need to measure the Out- door Ambient temperature, the Suction Line Pressure (PSIG), The Liquid Temperature and the Liquid Pres- sure.
  • Page 17 Example This system cannot be appropriately charged by subcooling. This new charging procedure helps prevent over charging. It is important to follow these instructions. You will need to measure the Outdoor Ambient temperature, the Suction Line Pressure (PSIG), The Liquid Temperature and the Liquid Pressure. You will charge to the MINIMUM Liquid Temperature or Maximum Liquid Line Pressure, whichever is reached first.
  • Page 18 STEP 4 - Measure Outdoor Ambient air temperature entering coil. 6” Outdoor Ambient air temperature = ________°F STEP 5 - Measure Suction Line and Liquid line pres- sures Suction Line Pressure = __________ PSIG Liquid Line Pressure = __________ PSIG Note: If Suction Line Pressure is below 115 PSIG the system may experience fluctuations in pressures and temperatures due to expansion valve hunting.
  • Page 19 STEP 7 - Determine Target (MINIMUM) Liquid Temperature 1. Identify the table that applies to your outdoor unit model number. 2. Find the Measured Outdoor Ambient Temperature from Step 4 along the top of the table. If the Outdoor Ambi- ent is below 60 ºF use the 60 ºF temperature on the table.
  • Page 20 Charging Tables 4TTM3018A1 4TTM3024A1 4TTM3030A1 4TTM3036A1 18-AC78D1-6...
  • Page 21 4TTM3042A1 4TTM3048A1 4TTM3060A1 18-AC78D1-6...
  • Page 22 STEP 8 - Determine Required Refrigerant Adjustment Compare the Measured Liquid Line Temperature from Step 6 against the Target (MINIMUM) Liquid Temperature from Step 7. If the Measured Liquid Line Temperature is above the Target (MINIMUM) Liquid Temperature and the Maximum Allowable Liquid Pressure has not been exceeded, you will add charge to the system.
  • Page 23 STEP 10 - Verify Refrigerant Adjustment Run system for ten (10) minutes. Check new Suction Pressure and Liquid Line Tem- perature. Measured Liquid Line Temperature = _____ ºF 10 MIN. Measured Suction Line Pressure = _____ PSIG Measured Liquid Line Pressure = _____ PSIG If the current Measured Suction Pressure is different than the previous Measured Suction Pressure mea- sured in Step 5, repeat Steps 6-9 and locate the new...

  • Page 24: 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 necessary so tubes do not rub against each other when the unit runs.
  • Page 25 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 26: Section 16. Independent Charge Verification

    Section 16. Independent Charge Verification To perform the Independent Charge Verification test, When the system is charged, follow these steps to verify begin by charging the system to the Minimum Liquid that the Subcooling Difference is within the tolerance Temperature or Maximum Liquid Line Pressure, range.
  • Page 27 STEP 6 - Using the Liquid Line Pressure measured STEP 5 - Locate the Charging Table (pages 20-21 of in Step 3, determine the Liquid Saturation this document) that corresponds to the model being Temperature using a standard Pressure and tested.
  • Page 28 The manufacturer has a policy of continuous product and product data improvement 6200 Troup Highway and it reserves the right to change design and specifications without notice. Tyler, TX 75707 Representative-only illustrations included in this document. www.trane.com www.americanstandardair.com © Trane U.S. Inc. 2012 18-AC78D1-6...

This manual is also suitable for:

4ttm30604ttm3018a4ttm3024a4ttm3030a4ttm3036a4ttm3042a ... Show all

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