Lennox International Inc. GHR32 - Manual (Page 5)

Page 5
Inspect furnace return air duct connection to ensure duct is
sealed to the furnace and terminates outside the space
containing the furnace.
Inspect the physical support of the furnace to guarantee
that it is sound without sagging, cracks or gaps around
base and it maintains seal between base and support.
Inspect and clean the condensate traps and drain.
Blower
Check and clean blower wheel for any debris. Blower moĆ
tor is pre-lubricated for extended bearing life. No further luĆ
brication is needed.
Burner Flame
Set thermostat to call for heat. Allow unit to operate for a
few minutes to establish normal burning conditions. Check
burner flame. Flame should be predominantly blue and
strong in appearance.
CAUTION
Periodically look through the flame sight glass to
check the burner flame.
Contact your Lennox dealer for a periodic unit inspection
by a qualified service technician.
Service Reminder
Call your Lennox service technician if unit is inoperative.
Before calling, always check the following to be sure serĆ
vice is required:
1 - Check that electrical disconnect switches are ON.
2 - Check room thermostat for proper setting.
3 - Replace any blown fuses or reset circuit breakers.
4 - Gas valve should be ON.
5 - Air filter should not be plugged limiting air flow.
6 - Is gas turned on at meter?
7 - Is manual main shut-off valve open?
Safety Precautions
If you discover any of the following, shut down your
unit, and contact an independent Lennox dealer for an
inspection by a qualified technician.
D
If you repeatedly hear any new or unfamiliar sounds
while your unit is operating, there may be a problem. For
example, poorly performing burners can produce unfaĆ
miliar noises.
D
If you smell any unusual odors, your unit may be operatĆ
ing improperly. For example, units can give off unfamilĆ
iar odors if components are required to operate in abĆ
normal conditions.
D
Look for visible signs of a malfunctioning unit. Examples
include unusual amounts of condensate on windows inĆ
side your house, visibly burnt components, or unusual
accumulation of rust in the unit.
D
If you experience headache, nausea, fatigue, or dizziĆ
ness, the cause could be exposure to carbon monoxide
gas. This is often misdiagnosed as the flu because
symptoms are similar. If you suffer from flu-like sympĆ
toms that are exaggerated at home, but seem to subĆ
side while you are away from the house, exposure to
carbon monoxide could be the cause.
Your vigilance may pay off in early detection of a problem
before either personal injury or property damage occurs.
Do not hesitate to contact a qualified service technician as
an investment in your well being.
Planned Service
You should expect a service technician to check the followĆ
ing items during an annual inspection. Power to the unit
must be shut off for the service technician's safety.
Burners- Must be inspected for rust, dirt, or signs of water.
Vent pipe - Must be inspected for dirt, damaged or sagging
unsupported pipe, or disconnected joints.
Unit appearance - Must be inspected for rust, dirt, signs
of water, and burnt or damaged wires components.
Blower access door - Must be properly in place and proĆ
vide a seal between the return air and the room where the
furnace is installed.
Return air duct - Must be properly attached and provide
an airtight seal to unit.
Operating performance - Unit must be observed during
operation to monitor proper performance of the unit and the
vent system.
Combustion gases - Flue products must be analyzed and
compared to the unit specifications.
Problems detected during the inspection may make it necĆ
essary to temporarily shut down the furnace until the items
can be repaired or replaced.
Pay attention to your furnace. Situations can arise beĆ
tween annual furnace inspections that may result in unsafe
operation. For instance, items innocently stored next to the
air inlet may obstruct the combustion air supply. This could
cause incomplete combustion and the production of carĆ
bon monoxide gas.