Lennox International Inc. G50UH(X) SERIES - Manual (Page 5)

Page 5
4 - White Rodgers 36E/36F Gas Valve - Switch gas
valve lever to OFF.
Honeywell VR8205 Gas Valve - Turn knob on gas
valve clockwise
to OFF. Do not force.
5 - Replace the upper access panel.
Filters
This unit is not equipped with a filter or rack. A field-pro-
vided, high-velocity filter is required to ensure proper unit
operation.
A filter must be in place any time the unit is operating.
Seasonal Inspections
A qualified service technician should inspect the complete
system each season (heating and cooling). The following
maintenance procedures should only be conducted by a
qualified service technician. Do not attempt to service
the unit in any way.
Venting System
WARNING
Asphyxiation Hazard
The exhaust vent for this furnace must be securely
connected to the furnace flue collar at all times.
For your safety and to fulfill the terms of the limited
warranty, a qualified service technician must annual-
ly inspect this furnace and its vent system.
Annually (before heating season) inspect furnace venting
system, vent cap, heat exchanger and burners for corro-
sion, deterioration, or deposits of debris. Remove any ob-
structions.
Inspect thefurnace venting system to make sure it is in
place, physically sound and without holes, corrosion, or
blockage. The vent connector must be correctly posi-
tioned and sloped upward. The vent connector must be
physically sound, without holes or excessive corrosion.
Inspect the furnace return air duct connection. The duct
must be sealed to the furnace and it must terminate outside
the space containing the furnace.
Inspect the physical support of the furnace to guarantee
that it is sound. The support must not sag and must not
have cracks or gaps around the base of the furnace. There
must be a seal between the furnace base and the support.
During a seasonal check, the service technician will in-
spect the indoor blower and the burner flames along with
the venting system.
Blower
Check blower wheel for any debris and clean it, if neces-
sary. The blower motor is pre-lubricated for extended bear-
ing life. No further lubrication is needed.
Burner Flame
CAUTION
To ensure proper operation, a qualified technician
should annually check the burner flame.
Service Reminder
Call your Lennox service technician if the unit will not oper-
ate. Before calling, always check the following to be sure
service 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, which wil limit air flow.
6 - Is gas turned on at meter?
7 - Is manual main shut-off valve open?
Record the model and serial number of the furnace. These
numbers are on the unit nameplate, which is located below
the burners.
Serial Number ________________________________
Model Number ________________________________
Safety Precautions
If you discover any of the following, shut down your
unit and contact a Lennox dealer for an inspection by a
qualified technician.
- 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 unfa-
miliar noises.
- If you smell any unusual odors, your unit may be operat-
ing improperly. For example, units can give off unfamil-
iar odors if components are required to operate in ab-
normal conditions.
- Look for visible signs of a malfunctioning unit. Examples
include unusual amounts of condensate on windows in-
side your house, visibly burnt components or unusual
dirt or rust accumulations on the vent pipe or in the unit.
- If you experience headache, nausea, fatigue, or dizzi-
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 symp-
toms that are exaggerated at home, but seem to sub-
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.