Table of Contents
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Installer's Guide
TRANE Link or ComfortLink™ ™ II
Variable Speed Heat Pumps and Air Conditioners
4TWV8X24A1000A
4TWV8X36A1000A
4TWV8X48A1000A
4TWV8X60A1000A
The Diagnostics Mobile App is available by scanning a QR
code located inside this unit or by searching for the Link
Diagnostics App in your App Store ® .
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 precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment.
September 2021
4TTV8X24A1000A
4TTV8X36A1000A
4TTV8X48A1000A
4TTV8X60A1000A
S S A A F F E E T T Y Y W W A A R R N N I I N N G G
1 1 8 8 - - B B C C 1 1 0 0 6 6 D D 1 1 - - 1 1 C C - - E E N N
N N o o t t e e : : "Graphics in this document are for representation only. Actual
model may differ in appearance."
N N o o t t e e : : This unit can be used in Comfortlink ™ II ("clii") mode or Link
mode.
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Table of Contents
Related Manuals for Trane ComfortLink II 4TWV8X36A1000A
Summarization of Contents
Installer's Guide
TRANE Link or ComfortLink™ II Variable Speed Heat Pumps and Air Conditioners
Introduces the product line covered in the installer's guide.
Link™ Diagnostics Mobile App
Provides information on using the mobile diagnostic application.
General Safety Warning
A critical safety warning for installers concerning hazards.
Safety Section
Hazardous Voltage, Refrigerant, and Hot Surface Warnings
Critical safety warnings for electrical hazards, refrigerant handling, and hot surfaces.
Grounding, Service Valve, Brazing, and Leakage Current Safety
Safety measures for grounding, service valves, brazing, and electrical leakage.
Safety Section (continued)
400 Volts Electrical Hazard Warning
Specific warning about high voltage electrical hazards.
Approved Unit Combinations and Operating Range
Lists compatible units and defines operational temperature ranges.
Unit Location Considerations
Unit Dimensions, Weight, and Refrigerant Line Connection Sizes
Technical specifications for units and refrigerant line sizes.
Unit Location Considerations (continued)
Alternate Refrigerant Line Sizes and Installation Location Guidelines
Details alternate line sizes and general placement rules.
Unit Location Considerations (continued)
Cold Climate and Coastal Installation Precautions
Specific considerations for installing units in challenging environments.
Unit Preparation
Setting Up the Unit and Pad Installation
Instructions for preparing the unit and installing it on a support pad.
Refrigerant Line Considerations
Factory Charge and Required Refrigerant Line Length
Information on initial refrigerant charge and calculating line length.
Refrigerant Line Insulation Requirements
Guidelines for insulating refrigerant lines.
Refrigerant Line Considerations (continued)
Reuse of Existing Lines and Routing Precautions
Steps for reusing lines and general routing safety.
Isolation from Joist/Rafter
Specific method for isolating lines from structural elements.
Refrigerant Line Considerations (continued)
Isolation in Wall Spaces and Through Walls
Methods for isolating refrigerant lines within walls.
Refrigerant Line Brazing
Braze the Refrigerant Lines Procedure
Step-by-step instructions for brazing refrigerant lines.
Refrigerant Line Brazing (continued)
Brazing Procedure and Heat Damage Precautions
Continues brazing steps and emphasizes heat damage precautions.
Refrigerant Line Leak Check and Evacuation
Checking for Leaks and Evacuating the System
Procedures for leak testing and system evacuation.
Service Valves
Opening Gas and Liquid Service Valves
Detailed instructions for operating service valves.
Electrical – Low Voltage Communicating
Low Voltage Maximum Wire Length and Link Mode Hook-up Diagrams
Specifies wire length limits and wiring for Link mode.
Electrical – Low Voltage Communicating (continued)
clii Mode Low Voltage Hook-up Diagrams
Wiring diagrams for the clii communication mode.
Electrical – Low Voltage Communicating (continued)
Link Low Voltage Wire Connectors
Details on using specific connectors for Link mode wiring.
Electrical – High Voltage
High Voltage Power Supply and Disconnect Switch Requirements
Essential information on high voltage power connections and disconnects.
Integrated Variable Speed Control Board LED Indicators
LED Status in clii and Link Modes
Explains the meaning of LED indicators on the control board.
Start Up
System Startup and Test Mode Procedure
Guides the user through the initial startup and testing process.
System Charge Adjustment
Temperature Measurements and Subcooling Correction Worksheet
Instructions for measuring temperatures and calculating charge corrections.
Subcool Charging Correction Charts
Subcooling Correction Charts by Ton
Graphical representations for adjusting subcooling based on line length and lift.
Subcool Charging Correction Charts (continued)
R-410A Refrigerant Charging Chart
Table detailing refrigerant charge based on liquid temperature and design subcooling.
Charging the Unit
Proper Gage Pressure, Stabilization, and Performance Verification
Steps to ensure correct refrigerant charge and system performance.
System Information Recording
Fields for recording system operating parameters after charging.
Subcooling Charging Below 55° F Outdoor Temp. (In Heating Only)
Weigh-In Method for Heating Mode Charging
Procedure for charging in heating mode at low outdoor temperatures.
Communicating Display Assembly (CANda)
Navigation and Technician Menu Operations
Guide to operating the CANda display interface and its menus.
Defrost Control (Heat Pump only)
Demand Defrost Operation and Forced Defrost Procedure
Explains demand defrost and how to perform a forced defrost test.
Checkout Procedures
Installation Checklist and Final Unit Verification
A comprehensive list of checks for installation completion.
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