Lennox LRP14HP Series

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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, service agency, or the gas supplier.

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.

WARNING

Electric Shock Hazard. Can cause injury or

death. Unit must be properly grounded in

accordance with national and local codes.

Line voltage is present at all components when

unit is not in operation on units with single-

pole contactors. Disconnect all remote electric

power supplies before opening access panel.

Unit may have multiple power supplies.

LRP14HP/AC/GE/GN

LRP16GE/HP

Table of Contents

Specications – LRP14HP .............................................2

Specications – LRP14AC ............................................3

Specications – LRP14GE / LRP14GX ......................... 4

Specications – LRP14GN ............................................ 5

Specications – LRP16GE / LRP16GX ......................... 6

Specications – LRP16HP ............................................7

Electric Heat Capacities – LRP14HP and AC Models –

LRP16HP .......................................................................8

Gas Heat Capacities – LRP14GE Only ......................... 8

Gas Heat Capacities – LRP16GE Only ......................... 8

Gas Heat Capacities – LRP14GN Only .........................8

Electrical .......................................................................9

Typical Parts Arrangement ..........................................16

Unit Applications ..........................................................18

Blower Data – LRP14HP .............................................23

Blower Data – LRP14AC ............................................. 24

Blower Data – LRP14GE / LRP14GX...........................25

Blower Data – LRP14GN..............................................26

Blower Data – LRP16GE / LRP16GX...........................27

Blower Data – LRP16HP ..............................................28

Wiring Diagrams and Sequence of Operation .............. 35

LRP14GN – Heating Components and Operation........46

Service Literature

UNIT INFORMATION

Corp. 100032

October 7, 2021

LRP14HP/LRP14AC/LRP14GE/LRP14GN/LRP16GE/LRP16HP SERIES UNITS

The LRP14/16 series packaged units are available in siz-

es ranging from 2 through 5 tons (7.0 through 17.6 kW).

The LRP14/16 unit is designed for HFC-410A refrigerant

and for outdoor residential use only. Units can be installed

at ground level or on rooftops. The LRP14 units utilize a

scroll compressor. LRP16GE/GX/HP units utilize a two-

stage compressor. Information contained in this manual is

intended for use by qualied service technicians only. All

specications are subject to change. Procedures outlined

in this manual are presented as a recommendation only

and do not supersede or replace local or state codes.

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Summary

Safety Information and Warnings

General Safety Warnings

Critical safety precautions regarding installation, service, and operation.

Unit Specifications Overview

LRP14 Series Specifications

Performance and physical data for LRP14HP, LRP14AC, LRP14GE, LRP14GN models.

LRP16 Series Specifications

Performance and physical data for LRP16GE, LRP16GX, LRP16HP models.

Electrical Data and Ratings

LRP14 Series Electrical Data

Electrical characteristics, overcurrent protection, and ampacity for LRP14 series.

LRP16 Series Electrical Data

Electrical characteristics, overcurrent protection, and ampacity for LRP16 series.

Unit Applications and Components

Unit Applications Overview

Description of different unit series and their intended uses.

Key Unit Components

Details on major components like contactors, transformers, and capacitors.

Blower System Operation and Data

Blower Control Board and Speed Settings

Information on blower control board operation and speed adjustments.

Blower Performance Data Tables

Tables detailing blower airflow (CFM) at various static pressures for different models.

Wiring Diagrams

LRP14 Series Wiring Diagrams

Electrical connection diagrams for LRP14HP, LRP14AC, LRP14GE, LRP14GN units.

LRP16 Series Wiring Diagrams

Electrical connection diagrams for LRP16GE, LRP16HP units.

Sequence of Operation

Single-Stage Compressor Operation

Step-by-step process for cooling, heat pump, and gas heat modes.

Two-Stage Compressor Operation

How the two-stage compressor modulates capacity for cooling demand.