Trane ComfortLink II 4TTV8X48A1000A User Manual

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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
1188--BBCC110066DD11--11CC--EENN
TRANE Link or ComfortLink™™ II
Variable Speed Heat Pumps and Air Conditioners
4TWV8X24A1000A
4TWV8X36A1000A
4TWV8X48A1000A
4TWV8X60A1000A
4TTV8X24A1000A
4TTV8X36A1000A
4TTV8X48A1000A
4TTV8X60A1000A
TM
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
® .
NNoottee:: “Graphics in this document are for representation only. Actual
model may differ in appearance.”
NNoottee:: This unit can be used in Comfortlink
™ II (“clii”) mode or Link
mode.
Installer’s Guide

Trane ComfortLink II 4TTV8X48A1000A Specifications

General

Model	4TTV8X48A1000A
Brand	Trane
Series	ComfortLink II
Type	Air Conditioner
SEER Rating	Up to 18
Compressor Type	Two-Stage
Refrigerant	R-410A
Energy Efficiency Ratio (EER)	13
HSPF	Not Applicable
Stages	2
Voltage	208/230V
Phase	1
Frequency	60 Hz
Cooling Capacity	48, 000 BTU/H
Warranty	10 years

Summary

SAFETY SECTION

Hazardous Voltage

Warning about severe personal injury or death from electrical hazards.

Refrigerant Oil Warning

Precautions regarding R-410A refrigerant and PVE oil.

Hot Surface Caution

Warning about potential burns from hot surfaces.

Contains Refrigerant Caution

Safety notice regarding high-pressure refrigerant systems.

Grounding Required Caution

Importance of proper grounding for electrical safety.

Service Valves Warning

Cautionary advice for opening service valves to prevent charge release.

Brazing Requirements Warning

Emphasizes brazing over mechanical connections and leak testing.

High Leakage Current Warning

Risks associated with high leakage current and essential earth connection.

400 Volt Electrical Hazard

Warning about severe personal injury or death from 400V electrical components.

Refrigerant Line Considerations

Refrigerant Line Brazing

Braze the Refrigerant Lines

Refrigerant Line Leak Check

Refrigerant Line and Indoor Coil Evacuation

Electrical – Low Voltage Communicating

Low Voltage Maximum Wire Length

Low Voltage Hook-up Diagrams in Link mode

Wiring diagrams for connecting units in Link mode.

Low Voltage Hook-up Diagrams in clii mode

Specific wiring diagrams for the clii communication mode.

Link Low Voltage Wire Connectors

Electrical – High Voltage

High Voltage Power Supply

Information on matching the high voltage power supply to the equipment nameplate.

High Voltage Disconnect Switch

Requirements for installing a disconnect switch and connection safety.

System Charge Adjustment

Temperature Measurements

Subcooling Charging Corrections

Worksheet and process for determining subcooling corrections.

Subcool Charging Correction Charts

2.0 Ton Subcool Charging Corrections

3.0 Ton Subcool Charging Corrections

4.0 Ton Subcool Charging Corrections

5.0 Ton Subcool Charging Corrections

R-410A Refrigerant Charging Chart

Charging the Unit

Defrost Control (Heat Pump only)

Demand Defrost Operation

Fault Identification and Defrost Enabled

Defrost Initiation and Termination