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Lennox TPA Series Heat Pump Service Information

This service literature provides essential technical information for Lennox TPA Series heat pump units, specifically the TPA090S4S and TPA120S4S models. Designed for light commercial applications, these units utilize HFC-410A refrigerant and are equipped with scroll compressors.

Key Information Covered:

Detailed specifications and electrical data for TPA090S4S and TPA120S4S models.
Component identification and parts arrangement diagrams.
Comprehensive guide to the refrigerant system and charging procedures.
Step-by-step instructions for unit start-up and maintenance.
Important safety precautions, including Electrostatic Discharge (ESD) procedures.
Wiring diagrams and sequence of operation for cooling, heating, and defrost modes.

This manual is intended for qualified service technicians, offering guidance on installation, operation, and maintenance to ensure optimal performance and safety.

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