Owners Manual

5
Specifications subject to change without notice.
440 02 4501 00
2. Close the external manual gas valve.
Figure 9 Close Valve
C
L
O
S
E
A06188
3. Turn OFF electrical supply to the furnace.
Figure 10 Turn off Electrical Supply
A92185
4. Remove the outer door by turning knobs, then pull door
forward.
Figure 11 Remove Furnace Door (upflow shown)
A11302
5. Turn the control switch on the gas control to the OFF
position and wait 5 minutes. See Figure 12. Then smell
for gas, including near the floor. If you smell gas, STOP!
Follow “B” on furnace label and follow the safety
information on the cover of this manual. If you don’t smell
gas, go to next step.
Figure 12 Control Switch to OFF
A11292
NAT.
GAS
CONSULT
MANUAL
BEFORE
ADJUSTING
GAS
PRESSURE
OFF
ON
GAS CONTROL SWITCH
SHOWN IN “OFF” POSITION
GAS CONTROL SWITCH
SHOWN IN “OFF” POSITION
TWO-STAGE GAS CONTROL
SINGLE-STAGE GAS CONTROL
MODULATING GAS CONTROL
6. Turn the control switch to ON.
Figure 13 Control Switch to ON
A11291
NAT.
GAS
CONSULT
MANUAL
BEFORE
ADJUSTING
GAS
PRESSURE
OFF
ON
GAS CONTROL SWITCH
SHOWN IN “ON” POSITION
TWO-STAGE GAS CONTROL
SINGLE-STAGE GAS CONTROL
GAS CONTROL SWITCH
SHOWN IN “ON” POSITION
MODULATING GAS CONTROL
7. Replace the outer door by placing flange inside casing,
push door firmly against casing and turn knobs to tighten.
Figure 14 Furnace Door Replaced
A11301