Lennox GCS16-240

Turning Off Gas to Furnace
-
2-
If using an electromechanical thermostat, set to the
lowest setting.
Before performing any service, turn off all electrical
power to the furnace.
&CAUTION
3- Open or remove the heat section access panel.
4- Turn the knob on the gas valve clockwise _1_ to
"OFF". Depress 36C knob slightly. Do not force.
5- Replace heat section access panel.
The combustion air pressure switch checks the
combustion air inducer operation before allowing power
to the ignition controller. Ignition controller will not
operate if blower is obstructed.
Under normal operating conditions, the combustion air
blower wheel should be inspected prior to heating
season. With power supply disconnected, the condition
of the blower wheel can be determined by removing the
vent cap assembly and looking through the exhaust
vent. Remove any deposits of debris from vent cap
assembly before reinstalling it on unit. If cleaning
combustion air inducer is necessary, contact a qualified
service technician. See figure 4 and 5.
&WARNING
&WARNING
The primary air is permanently set for normal operation.
The flame will be basically blue with some clear yellow
streaking in the end of the flame. Inspect burner flame
periodically during heating season using inspection port
provided on the burner access panel.
To maintain efficiency and longevity, your equipment
must be serviced yearly by a qualified service technician.
Failure to provide proof of service can void warranty.
GAS HEAT SECTION - 072,090
._OMBUSTION _--
_,IRINDUCER
MANUALKNOB
GAS VALVE --_
O
BURNERS /
COMBUSTION
AIR LOUVERS
VENT
CAP
FIGURE 4
GAS HEAT SECTION - 120, 150, 180, 240
;OMBUSTION .
_IRINDUCER
MANUALKNOB
GAS VALVE --_
O
BURNERS _
COMBUSTION
AIR LOUVERS
I
VENT
CAP
FIGURE 5
A-Servicing Filter
GCS16 units are equipped with pleated 2"
throwaway-type filters, Filters should be checked
monthly and replaced when necessary with filters of like
kind and size. Take note of air flow direction marking on
filter frame when reinstalling filters. See figure 6,
NOTE--Filters must be U.L,C, approved or equivalent
for use in Canada,
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