Lennox LGA072

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 LGA072 Specifications

General

Brand	Lennox
Model	LGA072
Category	Air Conditioner
Language	English

Summary

Users Information Manual - Safety

Fire and Explosion Hazard Warning

Failure to follow safety warnings exactly could result in serious injury, death or property damage.

What to Do If You Smell Gas

Immediate actions and contacting gas supplier or fire department if gas is detected.

Parts Arrangement Diagrams

LGALGC036-072 Parts Arrangement

Diagram showing components of the LGA/LGC036, 042, 048, 060, 072 models.

LGALGC090-150 Parts Arrangement

Diagram showing components of the LGA/LGC090, 102, 120, 150 models.

Parts Arrangement Diagrams (Continued)

LGALGC156-300 S Parts Arrangement

Diagram showing components of the LGA/LGC156, 180, 210, 240, 300S models.

LGALGC248-360 Parts Arrangement

Diagram showing components of the LGA/LGC248, 300H, 360 models.

General Safety Precautions

Operational Safety Warnings

Covers combustible materials, airflow, installation, electrical shock, and fiberglass wool hazards.

Pre-Lighting and Startup Safety

Read before lighting; automatic spark ignition system; safety shutdown procedures.

Unit Operation and Gas Control

Thermostat and Gas Valve Procedures

Instructions for setting thermostat and operating gas valves for various models.

Turning Off Gas to Furnace

Procedure for safely shutting off the gas supply to the furnace for maintenance.

Maintenance and Inspection

Burner Flame and Flue Inspection

Guidance on inspecting burner flame and flue passages for proper operation.

Yearly Service Requirement

Requirement for yearly servicing by a qualified technician to maintain efficiency and warranty.

Component Servicing and Specifications

Filter Servicing and Burner Cleaning

Guidelines for filter replacement, burner cleaning, and ignition setup.

Lubrication and Manifold Pressures

Information on motor lubrication and required manifold pressures for different gas types.

Advanced Maintenance and Service Information

Combustion Air Inducer and Flue Cleaning

Procedures for cleaning the combustion air inducer and flue passageways.

Service Reminders and Parts Ordering

Checklist before calling service and information on ordering repair parts.