Lennox LGC150 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 LGC150 Specifications

General

Cooling Capacity	14, 400 - 17, 400 BTU
HSPF	Not Available
Refrigerant	R-410A
Voltage	208/230V
Phase	1
Operating Voltage	208/230V

Summary

Safety

General Safety Precautions

Keep unit area clear of combustibles and ensure unobstructed airflow for combustion.

Hazard Warnings

Covers explosion, fire, electrical shock, improper servicing, water damage, and fiberglass exposure risks.

Unit Operation

Before Lighting Procedures

Instructions for pre-lighting safety checks, gas smell test, and thermostat settings for ignition.

Placing Unit Into Operation

Step-by-step guide for starting the furnace, including gas valve operation for different models.

Turning Off Gas to Furnace

Procedure for safely shutting off gas supply and electrical power to the furnace for service.

Maintenance and Inspection

Burner Flame

Guidance on inspecting burner flame appearance for normal operation and identifying potential issues.

Flue Passage and Vent Inspection

Annual inspection of combustion air louvers, vent cap, heat exchanger, and burners for debris or corrosion.

Service Requirements

Annual servicing by a qualified technician is necessary for efficiency, longevity, and warranty.

Servicing Filters

Filter Replacement

Guidance on checking and replacing filters monthly with correct size and airflow direction.

Burner Cleaning

Procedure for cleaning burners, including removing screws, cleaning, and reassembly.

Component Maintenance

Combustion Air Inducer Cleaning

Steps to clean the combustion air inducer wheel, housing, and flue box cover.

Flue Passageway and Flue Box

Instructions for cleaning the flue box and heat exchanger tubes with a wire brush.

Service Reminder Checklist

Pre-call checklist to ensure unit is operational before contacting a service technician.