Lennox G27M User Manual

PRODUCT LITERATURE

1999 Lennox Industries Inc.

Dallas, Texas



503,589M
7/99
Supersedes 9/98

G27M

SERIES

GAS FURNACE

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.

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 perĆ
formed by a qualified installer, serĆ
vice agency or the gas supplier.

Litho USA

WARNING

WHAT TO DO IF YOU SMELL GAS:

Do not try to light any appliance.
Extinguish any open flames.
Do not touch any electrical switch; do not

use any phone in your building.
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.

Page 1

G27M PARTS IDENTIFICATION

1

2

3

4

5

6

7

UPFLOW POSITION

1 - COMBUSTION AIR

BLOWER
2 - PRESSURE SWITCHES
3 - GAS VALVE
4 - ROLLOUT SWITCH

(One on each side)
5 - BURNERS
6 - TWO-STAGE CONTROL

BOARD
7 - IGNITION CONTROL BOARD
8 - BLOWER

8

WARNING

Product contains fiberglass wool.Disturbing the
insulation in this product during installation,
maintenance, or repair will expose you to fiberĆ
glass wool. Breathing this may cause lung canĆ
cer. (Fiberglass wool is known to the State of
California to cause cancer.)Fiberglass wool may
also cause respiratory, skin, and eye irritation.To
reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or con tact
your supervisor.

Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379-9900

8

7

6

1

2

3

4

5

DOWNFLOW POSITION

WARNING

Do not use this furnace if any part has been underĆ
water. Immediately call a qualified service techniĆ
cian to inspect the furnace and to replace any part
of the control system and any gas control which
has been under water.

CAUTION

Before attempting to perform any service or mainteĆ
nance, turn the electrical power to unit OFF at disconĆ
nect switch.

IMPORTANT

WARNING

If overheating occurs or if gas supply fails to shut
off, shut off the manual gas valve to the appliance
before shutting off electrical supply.

Any additions, changes, or conversions required in
order for the appliance to satisfactorily meet the apĆ
plication needs must be made by a Lennox service
technician using factory specified and approved
parts.

Page 2