Fig. 18—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
Fig. 19—Installation of Low Gas Pressure Switch
A99222
OFF
STREET
ELBOW
1
⁄
8
-IN. NPT x 1-
1
⁄
2
-IN.
NIPPLE
INLET PRESSURE TAP
1
⁄
8
-IN. NPT
(PLUGGED FOR
NATURAL GAS)
PRESSURE
SWITCH (LGPS)
ON/OFF
SWITCH
ON
—15—