SECTION FOUR – Routine Maintenance and Professional Servicing
2222.... MMMMaaaaiiiinnnn BBBBuuuunnnnddddlllleeee::::
A.Stuff into slot in top plate and down into Control
Box, Control Board ends up.
B. Add bushing to Control Box and Top Plate.
C. Make connections as shown above. Don’t do
Control Board connections yet.
D.Thread Sub-harness (TM, AGS, HL, WP,) down
through bottom of Control Box and out to AGS,
Thermistor, Water Pressure Switch, etc.
E. Thread Yellow TRANS, Yellow GV, and White SF
out through the hole on the back of the control
box and connect as shown.
4-36
Single Voltage Wiring Harness Connection Instructions
S1/
120
L1 L2 S2
24
VAC
I
N
D
F
1
F
2
T
H
V
A
L
G
N
D
FENWAL
FC1
FC2
DIAGNOSTIC INDICATOR
LED MODE
ON CONTROL FAULT
CAUTION: HI VOLTAGE - DISCONNECT WIRING BEFORE SERVICING
Step 2
IGM–1
Yellow w/Red Stripe (VAL)
IGM–2
Yellow w/White Stripe (GND)
Terminal Board–2
Yellow (FUSE)
Water Pressure Switch–2
Purple (WP)
Thermistor–2
Brown (TM)
AGS Switch–2
Red (AGS)
Hi-Limit Switch–2
Orange(HL)
Ground–1
Yellow w/White
Stripe (GND)
Transformer–2
Yellow (TRANS)
Gas Valve–2
Yellow w/White
Stripe (GV)
Stack Flue–2
White (SF)
IGM–1
Yellow (24VAC)
To Control
Board
Airflow
Switch–2
Blue (AF)
F
I
R
E
M
A
N
S
S
W
I
T
C
H
HOT
NEUTRAL
3083 1097
IGM–1
Yellow w/Orange Stripe (IND)
IGM –1
Yellow w/Blue Stripe (TH)