5. Turn gas supply manual shutoff valve to ON position.
6. Turn furnace gas valve control knob or electric switch to ON position.
7. Jumper R and W2 thermostat connections on control center. (See Fig. 16.) This keeps furnace locked in high-heat operation.
8. When main burners ignite, confirm inlet gas pressure is between 4.5- and 13.6-in. wc.
9. Remove jumper across R and W2 thermostat connections to terminate call for heat.
10. Turn furnace gas valve control knob or electric switch to OFF position.
Fig. 13—Removing Combustion Air Intake Box
A95443
COMBUSTION AIR
INTAKE BOX SCREWS
COMBUSTION
AIR INTAKE BOX
Fig. 14—Removing Diverter Plate
A96274
DIVERTER
PLATE
Fig. 15—Ignitor Position
A93260
BURNER
IGNITOR
13 32
"
11 32
"
7 8
"
C
L
C
L
IGNITOR
ASSEMBLY
IGNITOR
ASSEMBLY
CELL
PANEL
BURNER
BURNER BOX
Fig. 16—Condensing Furnace Control Center
A94299
P1
P3
W2 COM
24V
W/W1 Y/Y2 R
G
HUM
P4
ON
12345678
FLT (FAULT CODE RECALL)
LOW HEAT ONLY
BPH (BYPASS HUMIDIFIER)
EMERGENCY HEAT
MZ (MULTI ZONE)
COMPONENT TEST
HEATING BLOWER
OFF TIME DELAY
—23—
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