Trane 4TWB3030C - User Manual

18-BC85D1-2
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.
Heat Pumps
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.
4TWB3018–060
Installer’s Guide
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 .................................................... 13
Section 12. Electrical - High Voltage ................................................... 16
Section 13. Start Up .............................................................................. 17
Section 14. System Charge Adjustment ............................................. 18
Section 15. Checkout Procedures and Troubleshooting ................... 23

Trane 4TWB3030C Specifications

General

Type	Heat Pump
Cooling Capacity (BTU/h)	30000
Refrigerant	R-410A
Voltage	208/230
Phase	1
Heating Capacity (BTU/h)	30, 000

Summary

Section 1. Safety

Section 2. Unit Location Considerations

2.1 Unit Dimensions and Weight

Details unit dimensions and estimated weights for different models.

2.2 Refrigerant Piping Limits

Specifies maximum refrigerant line length and vertical change.

2.3 Suggested Locations for Best Reliability

Provides guidance on optimal placement for unit performance and noise reduction.

2.4 Cold Climate Considerations

Offers precautions for installations in cold climates with snow.

2.5 Coastal Considerations

Advises on protecting units in coastal areas with salt water exposure.

Section 3. Unit Preparation

3.1 Prepare The Unit For Installation

Instructions for checking unit for damage and removing it from the pallet.

Section 4. Setting the Unit

4.1 Pad Installation

Guidelines for selecting and preparing a suitable support pad for the unit.

Section 5. Refrigerant Line Considerations

5.1 Refrigerant Line and Service Valve Connection Sizes

Details line sizes and service valve connection sizes for various models.

5.2 Factory Charge

Explains the factory charge quantity and when adjustments are needed.

5.3 Required Refrigerant Line Length

Prompts for determining and recording line length and vertical change.

5.4 Refrigerant Line Insulation

Emphasizes the need for vapor line insulation and preventing metal contact.

5.5 Reuse Existing Refrigerant Lines

Precautions for using existing refrigerant lines in retrofit applications.

Section 6. Refrigerant Line Routing

6.1 Precautions

Guidelines for preventing noise and ensuring proper line set installation.

Section 7. Refrigerant Line Brazing

7.1 Braze The Refrigerant Lines

Step-by-step instructions for preparing and brazing refrigerant lines.

Section 8. Refrigerant Line Leak Check

8.1 Check For Leaks

Procedure for pressurizing lines and checking for leaks using soapy solution.

Section 9. Evacuation

9.1 Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system to a specific micron level.

Section 10. Service Valves

10.1 Opening the Gas Service Valve

Instructions for safely opening the gas service valve.

10.2 Opening the Liquid Service Valve

Instructions for safely opening the liquid line service valve.

Section 11. Electrical - Low Voltage

11.1 Low Voltage Maximum Wire Length

Table showing maximum allowed low voltage wire lengths based on wire size.

11.2 Low Voltage Hook-up Diagrams

Diagrams illustrating low voltage wiring connections for different indoor units.

11.3 Defrost Control

Explains defrost control settings, pin identification, and checkout procedures.

Section 12. Electrical - High Voltage

12.1 High Voltage Power Supply

Safety warnings and compliance requirements for high voltage power supply.

12.2 High Voltage Disconnect Switch

Recommendation to install a separate disconnect switch at the outdoor unit.

12.3 High Voltage Ground

Requirement to ground the outdoor unit according to codes.

Section 13. Start Up

13.1 System Start Up

Step-by-step guide for turning on and starting the system.

Section 14. System Charge Adjustment

14.1 Temperature Measurements

Instructions for measuring outdoor and indoor temperatures for charging.

14.2 Subcooling Charging in Cooling (Above 55° F Outdoor Temp.)

Detailed procedure for subcooling charging in cooling mode above 55°F ambient.

14.3 Subcooling Charging Below 55° F Outdoor Temp. (In Heating Only)

Method for charging in heating mode below 55°F outdoor temperature.

Section 15. Checkout Procedures and Troubleshooting

15.1 Operational And Checkout Procedures

Checklist for operational checks and final inspection of the installed system.

15.2 Troubleshooting

A fault guide correlating system faults with potential causes and checks.