Lennox LRP14GE36 - User Manual

Page 1
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.

Summary

Specifications - LRP14 HP

Specifications - LRP14 AC

Specifications - LRP14 GE; LRP14 GX

Specifications - LRP14 GN

Specifications - LRP16 GE; LRP16 GX

Specifications - LRP16 HP

ELECTRIC HEAT DATA - LRP14 HP Only

ELECTRIC HEAT DATA - LRP14 AC Only

ELECTRICAL DATA - LRP14 GE Only

ELECTRICAL DATA - LRP14 GN

ELECTRICAL DATA - LRP16 GE Only

ELECTRIC HEAT DATA - LRP16 HP Only

Unit Applications

LRP14 HP

Details for LRP14HP models, single phase packaged heat pump units.

LRP14 AC

Details for LRP14AC models, single phase packaged air conditioning units.

LRP14 GE

Details for LRP14GE models, single phase packaged air conditioning units with gas heat.

LRP14 GN

Details for LRP14GN models, single phase packaged air conditioning units with gas heat.

LRP16 HP

Details for LRP16HP models, single phase packaged heat pump units with 2-stage compressor.

LRP16 GE

Details for LRP16GE models, single phase packaged AC units with 2-stage compressor and gas heat.

UNIT COMPONENTS; OPERATION

Electronic Ignition

Operation and diagnostics of the electronic ignition system in gas-heat units.

Ignition Control (A3)

Details on ignition control board and diagnostic LED codes for gas-heat units.

Blower Control Board (A54) - ECM Motor - LRP16 GE; LRP16 HP

DEFROST CONTROL CMC1

Defrost Interval Timing Pins

Test Pins

Compressor Delay Pins

Diagnostic LEDs

Defrost Thermostat (S6)

Pressure Switch Signals

ELECTRIC HEAT

Matchups and Ratings

Electric Heat Components

Sequencer Relays 1 and 2

Circuit Breaker CB1 and CB2 (option) PHK-15, -20

Gas Valve (GV1) LRP16 GE Units

Control System Diagnostics

Fault Codes

MAINTENANCE

Inspect component wiring

Check fan and blade condition

Inspect drain pan

Inspect refrigerant piping

POST START-UP CHECKLIST (GAS)

Check for gas leaks

Check the supply gas pressure

Check for correct manifold gas pressures

Adjust temperature rise

Check and Adjust Manifold Pressure

Wiring Diagrams and Sequence of Operation

Heat Pump Wiring Diagram (Constant Torque)

Wiring diagram for heat pump units with constant torque blowers.

Defrost Control Diagnostic Codes

LRP14 AC Unit Wiring Diagram

LRP14 GE Unit Wiring Diagram

LRP16 HP Wiring Diagram

SEQUENCE OF OPERATION - SINGLE-STAGE COMPRESSOR

Cooling

Sequence of operation for cooling mode with single-stage compressor.

First Stage Heat Pump

Sequence of operation for first stage heat pump heating.

Second Stage Auxiliary Heat

Emergency Heat

Defrost Mode

Operation sequence for the defrost mode.

Gas Heat

Sequence of operation for gas heat mode.

SEQUENCE OF OPERATION TWO-STAGE COMPRESSOR

First Stage Cooling (Low Capacity)

Operation sequence for first stage cooling, low capacity.

Second Stage Cooling (High Capacity)

Operation sequence for second stage cooling, high capacity.

LRP14 GN - Heating Components and Operation

Gas Valve

Gas Manifold

Operating Signal Pressure and Manifold Pressure Measurement

Manifold Pressure

Post-Start Checklist (GAS)

Checks to perform after the heating section is operating.

Wiring Diagram - Single Phase CT

Lennox LRP14GE36 Specifications

General

Brand	Lennox
Model	LRP14GE36
Category	Furnace
Language	English