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Lennox T-Class TPA120S4S User Manual

Lennox T-Class TPA120S4S
13 pages
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RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs AND HFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
WARNING
This product and/or the indoor unit it is matched with may
contain fiberglass wool.
Disturbing the insulation during installation,
maintenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiberglass
wool is known to the State of California to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and
eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
INSTALLATION
INSTRUCTIONS
T-CLASSt TPA Series
7.5 AND 10 TON
HEAT PUMPS
7.5 TO 10 TONS
506148-01
12/2015
Supersedes 10/2011
Table of Contents
Shipping and Packing List 1......................
Outdoor Unit 1..................................
Unit Dimensions, Corner Weights and Center of
Gravities 2.....................................
Unit Plumbing Parts Arrangement 3...............
Unit Control Box Components Arrangement 4.......
Model Number Identification 4....................
Rigging the Unit for Lifting 4......................
Installation Clearances 5.........................
Line Set 5......................................
Refrigerant Charge and Check 8..................
System Operation 11.............................
Defrost System 11...............................
Defrost Control Board 11..........................
Maintenance 12..................................
Start-up and Performance Checklist 13.............
Shipping and Packing List
Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1 — Assembled outdoor unit
1 — Installation instruction
Outdoor Unit
TPA series heat pumps, which will also be referred to in this
instruction as the outdoor unit, uses HFC-410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the TP
Engineering Handbook.
This outdoor unit is designed for use in thermal expansion
valve (TXV) systems only.
Litho U.S.A.
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Lennox T-Class TPA120S4S Specifications

General IconGeneral
SEER RatingUp to 16
RefrigerantR-410A
Compressor TypeScroll
Voltage208/230V
Phase3
StagesSingle
HSPF Rating9.0

Summary

Outdoor Unit Overview

Unit Plumbing Parts Arrangement

Rigging the Unit for Lifting

Installation Clearances

Line Set Requirements

Electrical Connections Safety

Electrical Wiring and Installation

Circuit Sizing and Disconnect Switch

Guidelines for selecting appropriate circuit breakers and disconnect switches per NEC.

Refrigerant Charge and Check

Normal Operating Pressures Charging

Steps for charging the system based on outdoor temperature and pressures.

Approach Method Charging

Method for verifying charge by comparing liquid line temperature and ambient temperature.

System Operation

Defrost System Operation

Defrost Control Components and Timing

Details the defrost thermostat, control board, timing intervals, compressor delay, and time-off delay.

Pressure Switch Circuits and Lockout

Start-Up and Performance Checklist

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