Lennox G43UF SERIES

0312009
LENNOX)
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Oall8l, Teus, USA
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G43UF
SERIES
SuplllSlldes 02/2004
GAS FURNACE
f'Jl')jj) Technlcsl
lll.JPu~lioelions
Litho U.S.A.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity
of this or any other ap-
pliance.
Installation and sen/ice must
be
performed by a qualified installer
. '
servIce agency or the gas supplier.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
•
Do not touch any electrical switch; do not
use any phone in your building.
•
leave the building immediately.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
•
If you cannot reach your gas supplier, call
the fire department.
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Lennox G43UF SERIES Specifications

General

Heating Stages	Single-stage
Blower Motor	PSC
Gas Valve	Single-stage
Fuel Type	Natural gas or propane
Cabinet Type	Upflow/Horizontal
Cabinet Width	17.5 inches
Warranty	5-Year Limited Warranty on covered components
Heating Capacity	44, 000 to 132, 000 BTU/h

Summary

Lennox G43 UF Gas Furnace: Safety and Operation

Essential Safety Warnings and Operating Procedures

Covers fire/explosion hazards, homeowner notices, and safe operation guidelines.

Lennox Furnace Maintenance and Service

Filters, Maintenance, and Troubleshooting

Filter specs, seasonal maintenance, service reminders, and troubleshooting common issues.

Lennox Furnace Gas Valve and Brazing

Gas Valve Operation and Brazing Connections

Instructions for operating the gas valve and performing brazing connections.

Lennox 13 ACX Air Conditioner: Specifications and Installation

Unit Details, Dimensions, and Installation Procedures

Covers model info, specs, dimensions, clearances, and installation steps.

13 ACX Refrigerant System Handling

Line Set, Flushing, Brazing, and Leak Testing

Procedures for refrigerant lines, flushing, brazing, and leak detection.

13 ACX System Charging and Maintenance

Refrigerant Charging, Airflow, and Unit Maintenance

Guidance on refrigerant handling, airflow adjustment, and routine maintenance.

13 ACX System Operation and Controls

Sequence of Operations and Safety Controls

Explanation of cooling cycle, high-pressure switch, and unit start-up.

GSW Water Heater: Introduction, Safety, and Installation

Product Overview, Safety, and Installation Guidelines

Covers introduction, warranty, safety warnings, and plumbing/electrical installation.

GSW Water Heater Operation and Maintenance

Temperature Settings, Maintenance, and Troubleshooting

Instructions for operation, maintenance of key components, and issue resolution.

GSW Water Heater Thermal Expansion and Warranty

Managing Pressure and Understanding Warranty

Addressing thermal expansion issues and details of the limited warranty.

Broan Model 670 Fan Specifications

Fan Features, Performance, and Ratings

Details on fan features, AMCA/HVI performance data, and specifications.