SECTION FOUR – Routine Maintenance and Professional Servicing
W
W
W
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All Wire Ends and Terminals are marked. Match the
marks.
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Plug into IGM Board connector. Run L1 and L2 to
Terminal Board and 2 Grey IGN’s out back of
Control Box to Igniter as shown.
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A.Connect Ground outside Control Box under
screwhead.
B. Run HOT, NEU, and GND up to Terminal Board
as shown; fasten under screwheads. Use a bush-
ing in hole in bottom of Control Box.
C. Run other ends of bundle out bottom of Control
Box to Junction-Box; hook behind uprights in
Bottom Enclosure.
D.Fasten Wire Bundle with a wire tie.
E. Trim excess from wire ends in Junction-Box.
4-35
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 1
Ground – 1
Green (GND)
IGM – 4
Grey (IGN)
Black (L1)
White (L2)
Grey (IGN)
Terminal Board – 1
Black (HOT)
Terminal Board – 1
Black (L1)
Ground – 1
Green (GND)
Igniter – 2
Grey (IGN)
To Junction
Box
Terminal Board – 1
White (L2)
Terminal Board – 1
White (NEU)
Terminal Board – 1
Yellow (FUSE)
F
I
R
E
M
A
N
S
S
W
I
T
C
H
HOT
NEUTRAL
3082 1097
Wire into bottom
of Junction-box
in Flexible Conduit
Wiring Harness
to Control Box
120/240V:
Black
to Black (L1)
120V:
White to Red (L2) or
240V:
Red to Red (L2)
Choose correct plug from bag
in Control Box to match
incoming voltage (120 or 240V)
Green (Ground)
to
Green (Ground)
Bonding Wire
Bonding
Wire
Bonding Lug
View From Below
(Exterior)
View From Above
(Interior)
Cutout for
Conduit from
Fireman's Switch
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Hazardous voltage. Can kill, burn, or
shock.
This heater control system uses both 110 volt
AC and 24 volt AC. Take all normal precautions for
the voltages involved.
Disconnect power from heater before attempting to
service, repair, or rewire the electrical system.
Only trained, qualified service technicians should
attempt to service, repair, or rewire the electrical sys-
tem of this heater.