Lennox LGA102 User Manual

10/08
*2P1008*
504,875M
*P504875M*
LGA/LGC036, 042, 048, 060, 072
LGA/LGC090, 102, 120, 150,
LGA/LGC156, 180, 210, 240, 300S
LGA/LGC248, 300H, 360
©2006
Litho U.S.A.
504,875M
10/2008
Supersedes 1/2006
WHAT TO DO IF YOU SMELL GAS:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings ex-
actly could result in serious injury
death or property damage.
WARNING
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Installation and service must be per-
formed by a qualified installer, ser-
vice agency or the gas supplier.
D Do not try to light any appliance.
D Do not touch any electrical switch; do not
use any phone in your building.
D Immediately call your gas supplier from a
neighbor’s phone. Follow the gas suppli-
er’s instructions.
D If you cannot reach your gas supplier, call
the fire department.
D Extinguish any open flames.
ROOFTOP
UNITS
READ ALL INSTRUCTIONS IN THIS MANUAL
AND RETAIN FOR FUTURE REFERENCE
LGA240 SHOWN
See unit nameplate for manufacturer
and address.
FBR113270
(3, 3−1/2, 4, 5, and 6 TONS)
(7−1/2, 8-1/2, 10, and 12-1/2 TONS)
(13, 15, 17-1/2, 20, and 25 TONS)
(20, 25, and 30 TONS)
D Leave the building immediately.

Lennox LGA102 Specifications

General

Brand	Lennox
Model	LGA102
Category	Air Conditioner
Language	English

Summary

Parts Arrangement

LGA/LGC036-072 Models Parts Arrangement

Diagram illustrating the parts arrangement for LGA/LGC036, 042, 048, 060, 072 units.

LGA/LGC090-150 Models Parts Arrangement

Diagram illustrating the parts arrangement for LGA/LGC090, 102, 120, 150 units.

LGA/LGC156-300S Models Parts Arrangement

Diagram illustrating the parts arrangement for LGA/LGC156, 180, 210, 240, 300S units.

LGA/LGC248-360 Models Parts Arrangement

Diagram illustrating the parts arrangement for LGA/LGC248, 300H, 360 units.

Safety Information

General Safety Warnings

Covers explosion, fire, electrical shock, and improper servicing hazards.

Unit Operation Safety

Instructions for safe operation and lighting procedures.

Unit Operation and Gas Valve

Placing Unit Into Operation

Step-by-step guide for safely starting the furnace.

Gas Valve Operation Details

Instructions for operating White Rodgers and Honeywell gas valves.

Turning Off Gas to Furnace

Procedure for safely shutting off gas supply to the furnace.

Maintenance and Service

Burner Maintenance

Procedure for cleaning and inspecting furnace burners.

Flue Passage and Vent Inspection

Annual inspection of combustion air louvers, vent cap, and heat exchanger.

General Service Recommendations

Guidance on yearly servicing by qualified technicians.

Component Servicing

Servicing Filter

Instructions for checking and replacing air filters.

Lubrication Requirements

Details on lubricating blower shaft bearings.

Manifold Pressures

Information on manifold pressures for natural gas and propane.

Component Maintenance

Combustion Air Inducer Cleaning

Procedure for cleaning the combustion air inducer.

Flue Passageway and Flue Box Cleaning

Instructions for cleaning the flue box and heat exchanger tubes.

Service Reminder Checklist

Checks to perform before calling a service technician.