Lennox LRP16G

Page 1
INSTALLATION
INSTRUCTIONS
Table of Contents
Unit Dimensions ..........................................................2
Roof Curb Dimensions ................................................4
Adjustable Roof Curb Dimensions...............................6
Installation ...................................................................7
Venting.........................................................................9
Duct System ..............................................................10
Condensate Drain......................................................11
Gas Piping ................................................................. 11
Electrical Wiring .........................................................12
Heating Start-Up .......................................................13
Operation ...................................................................15
Maintenance – LRP16GE ..........................................18
Blower Performance ..................................................20
Wiring Diagram – LRP16GE .....................................21
LRP16HP ...................................................................22
Sequence of Operation..............................................23
Defrost System ..........................................................25
System Performance .................................................27
Maintenance – LRP16HP ..........................................27
Wiring Diagram – LRP16HP ......................................30
LRP16G(E/X) / LRP16HP UNITS
RESIDENTIAL PACKAGED UNITS
Gas/Electric – Heat Pump
508202-01
8/2021
©2021 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, or service agency.
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.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.

Lennox LRP16G Specifications

General

Type	Heat Pump
SEER Rating	16
HSPF Rating	Up to 9.5
Compressor Type	Scroll
Refrigerant	R-410A
Sound Level	74 dB
Sound Level (dB)	74
Operating Temperature Range (Cooling)	Up to 125°F
Stages	Single Stage

Summary

Unit Dimensions and Roof Curb Requirements

Unit Dimensions

Detailed measurements and diagrams for small and large base unit footprints and profiles.

Roof Curb Dimensions

Specifications for standard and adjustable roof curbs, including opening sizes and overall dimensions.

Installation and Site Preparation

Site Preparation and Inspection

Guidance on unit inspection, selecting a suitable outdoor location, and site preparation.

Rigging, Venting, and Ducting

Procedures for rigging, venting combustion products, and installing the duct system.

Utility Connections

Connecting the condensate drain, gas piping, and electrical wiring according to standards.

System Operation and Controls

Heating Start-Up and Burner Operation

Procedures for safely starting the heating system, including burner lighting and gas pressure checks.

Blower Control and Cooling Sequences

Configuring blower control and understanding cooling sequences and system operation.

Heating Sequences and Defrost System

Detailed operational sequences for heating modes and the defrost system.

Maintenance, Performance, and Diagrams

Maintenance Procedures

Routine inspection and cleaning of unit components for optimal operation.

Performance Data and Diagnostics

Blower performance, system checks, and diagnostic codes for troubleshooting.

Wiring Diagrams and HP Model Performance

Electrical schematics for LRP16GE/HP and performance data for HP models.