WIRING DIAGRAMS
TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY,
OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
WARNING
!
74
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
FURNACES WITH PCBBF139 CONTROL BOARD
G
N
G
N
D
C
O
L
O
R
C
O
D
E
S
:
G
N
G
R
E
E
N
R
D
R
E
D
G
Y
G
R
A
Y
P
U
P
U
R
P
L
E
P
K
P
I
N
K
B
K
B
L
A
C
K
B
L
B
L
U
E
W
H
W
H
I
T
E
B
R
B
R
O
W
N
Y
L
Y
E
L
L
O
W
O
R
O
R
A
N
G
E
G
N
D
B
K
R
D
GN
GN
24
VAC
115
VAC
G
N
D
GRD
BK
Y
L
O
Y
W
1
W
2
R
G
C
T
W
I
N
N
.
E
.
C
.
C
L
A
S
S
2
W
I
R
E
0
1
4
0
F
0
2
3
4
7
-
A
B
R
P
K
G
Y
O
R
GN
BL
Y
L
S
1
BK
HUM
X-FMR
L1
CIRC-H
EAC-H
5
2
1
4
3
2
4
V
3
A
F
U
S
E
N
E
U
T
R
A
L
D
I
A
G
N
O
S
T
I
C
L
E
D
'
S
5 CIRCUIT CONNECTOR
1
0
6
3
4
5
2
7
1
1
1
1
2
8
9
F
R
O
N
T
C
O
V
E
R
P
R
E
S
S
U
R
E
S
W
I
T
C
H
N
O
C
F
U
S
E
3
A
M
I
C
R
O
T
O
P
S
2
(
2
)
T
R
(
9
)
G
H
I
C
T
H
(
5
)
24V THERMOSTAT CONNECTIONS N.E.C.CLASS 2 WIRE
V
A
L
V
E
G
A
S
W
2
T
R
A
N
S
F
O
R
M
E
R
H
L
I
(
6
)
Y
2
Y
1
H
L
O
(
1
1
)
G
N
D
(
4
)
O
M
V
L
(
7
)
N
O
W
1
C
R
C
O
N
T
R
O
L
S
A
U
T
O
R
E
S
E
T
A
U
X
I
L
I
A
R
Y
L
I
M
I
T
L
I
M
I
T
C
O
N
T
R
O
L
S
M
A
N
U
A
L
R
E
S
E
T
R
O
L
L
O
U
T
P
R
E
S
S
.
S
W
T
I
C
H
H
I
G
H
F
I
R
E
C
S
W
I
T
C
H
L
O
W
F
I
R
E
P
R
E
S
S
M
V
H
(
1
)
D
E
H
U
M
G
N
D
P
S
1
(
1
2
)
L
I
M
I
T
C
O
N
T
R
O
L
A
U
T
O
R
E
S
E
T
P
R
I
M
A
R
Y
2
4
V
A
C
N
O
P
M
M
V
C
(
8
)
I
N
T
E
G
R
A
T
E
D
C
O
N
T
R
O
L
M
O
D
U
L
E
C
B
L
W
R
A
I
R
I
N
D
O
O
R
C
I
R
C
U
L
A
T
O
R
R
T
O
M
I
C
R
O
T
O
T
O
+
V
D
C
E
A
C
H
U
M
I
D
I
F
I
E
R
I
D
N
E
U
T
R
A
L
W
I
R
I
N
G
T
O
U
N
I
T
L
INTEGRATEDCONTROL MODULE
H
O
T
S
U
R
F
A
C
E
G
N
D
B
L
W
R
N
E
U
T
R
A
L
W
A
R
N
I
N
G
:
G
R
O
U
N
D
E
D
.
O
V
E
R
C
U
R
R
E
N
T
P
R
O
T
E
C
T
I
O
N
D
E
V
I
C
E
M
U
S
T
B
E
P
R
O
P
E
R
L
Y
S
W
I
T
C
H
N
E
U
T
R
A
L
E
L
E
C
T
R
O
N
I
C
A
I
R
I
G
N
I
N
D
H
I
D
I
S
C
O
N
N
E
C
T
F
S
P
O
L
A
R
I
Z
E
D
A
N
D
N
E
U
T
R
A
L
L
I
N
E
N
E
U
T
R
A
L
J
U
N
C
T
I
O
N
B
O
X
B
L
W
R
I
N
D
L
O
N
I
N
D
O
O
R
A
I
R
C
L
E
A
N
E
R
H
U
M
D
O
O
R
N
E
U
T
R
A
L
INTEGRATEDCONTROL MODULE
T
O
1
1
5
V
A
C
/
1
Ø
/
6
0
H
Z
P
O
W
E
R
S
U
P
P
L
Y
W
I
T
H
1
1
5
V
A
C
H
U
M
-
O
U
T
I
G
N
I
T
E
R
C
I
R
C
U
L
A
T
O
R
B
E
F
O
R
E
S
E
R
V
I
C
I
N
G
.
F
L
A
M
E
S
E
N
S
O
R
D
I
S
C
O
N
N
E
C
T
P
O
W
E
R
L
I
N
E
G
N
D
T1
T2
OR
BR
BK
WH
WH
WH
WH
PU
GY
YL
OR
BR
PK
RD
WH
BK
P
U
GY
B
R
OR
RD
OR
BL
RD
WH
WH
L
I
N
E
N
O
L
I
M
I
T
C
O
N
T
R
O
L
A
U
X
I
L
I
A
R
Y
A
U
T
O
R
E
S
E
T
PK
WARNING:DISCONNECT
TRANSFORMER
40 VA
PU
G
Y
N
N
O
3
1
S
W
I
T
C
H
P
R
E
S
S
U
R
E
L
O
W
F
I
R
E
S
E
N
S
O
R
F
L
A
M
E
P
R
E
S
S
U
R
E
S
W
I
T
C
H
F
R
O
N
T
C
O
V
E
R
C
TO UNIT MUST BE
BL
RD
AND GROUNDED.
1
JUNCTION BOX
WH
SWITCH (PRESS.)
FIELD SPLICE
FIELD GND
3
GN
BL
B
R
WH
N
O
L
I
M
I
T
C
O
N
T
R
O
L
A
U
T
O
R
E
S
E
T
P
R
I
M
A
R
Y
WH
1
OR
3
0
k
B
T
U
A
N
D
4
0
k
B
T
U
)
C
O
N
T
R
O
L
S
(
S
I
N
G
L
E
C
O
N
T
R
O
L
O
N
M
A
N
U
A
L
R
E
S
E
T
R
O
L
L
O
U
T
L
I
M
I
T
W
H
L
PU
GY
BK
S
W
I
T
C
H
A
S
S
E
M
B
L
Y
I
D
B
L
O
W
E
R
T
W
O
-
S
T
A
G
E
P
R
E
S
S
U
R
E
OR
WH
SERVICING. WIRING
EQUIPMENT GND
INTERNAL TO
S
W
I
T
C
H
P
R
E
S
S
U
R
E
H
I
G
H
F
I
R
E
PROT. DEVICE
INTEGRATED CONTROL
PK
PU
PLUG CONNECTION
2
4
B
K
C
D
O
O
R
O
P
E
N
)
(
O
P
E
N
W
H
E
N
D
O
O
R
S
W
I
T
C
H
C
O
M
P
A
R
T
M
E
N
T
B
L
O
W
E
R
SWITCH (TEMP.)
G
N
D
1
BLOWER
CIRCULATOR
JUNCTION
OR
4
0
V
A
Ø
/
6
0
H
Z
D
I
S
C
O
N
N
E
C
T
(
W
H
I
T
E
R
O
D
G
E
R
S
)
G
A
S
V
A
L
V
E
T
W
O
S
T
A
G
E
O
V
E
R
C
U
R
R
E
N
T
C
O
N
N
E
C
T
O
R
2
C
I
R
C
U
I
T
LOW VOLTAGE (24V)
YL
G
N
D
WH
CHASSIS GROUND
2
3
I
G
N
I
T
E
R
S
U
R
F
A
C
E
H
O
T
2
YL
PU
C
2
C
B
L
O
W
E
R
D
R
A
F
T
I
N
D
U
C
E
D
BK
PM
BK
B
L
O
W
E
R
C
O
M
P
A
R
T
M
E
N
T
1
1
5
V
A
C
/
1
OVERCURRENT
BK
HARNESS
ECM MTR
HI
TERMINAL
OR
POWER BEFORE
IGNITER
R
D
BK
T
O
RD
P
O
W
E
R
S
U
P
P
L
Y
W
I
T
H
B
U
R
N
E
R
C
O
M
P
A
R
T
M
E
N
T
P
R
O
T
E
C
T
I
O
N
D
E
V
I
C
E
PROPERLY POLARIZED
R
D
B
K
O
R
B
L
LOW VOLTAGE FIELD
HI VOLTAGE (115V)
HI VOLTAGE FIELD
R
A
P
I
D
=
T
W
I
N
N
I
N
G
E
R
R
O
R
S
T
E
A
D
Y
O
N
=
I
N
T
E
R
N
A
L
G
V
E
R
R
O
R
,
M
I
C
R
O
A
N
D
F
R
E
Q
U
E
N
C
Y
C
H
E
C
K
1
F
L
A
S
H
=
F
L
A
M
E
S
E
N
S
E
D
W
H
E
N
N
O
F
L
A
M
E
S
H
O
U
L
D
B
E
P
R
E
S
E
N
T
4
F
L
A
S
H
E
S
=
O
P
E
N
L
I
M
I
T
S
W
I
T
C
H
0
4
3
2
1
R
E
D
L
E
D
F
L
A
S
H
C
O
D
E
2
F
L
A
S
H
E
S
=
P
R
E
S
S
U
R
E
S
W
I
T
C
H
S
T
U
C
K
C
L
O
S
E
D
/
I
N
D
U
C
E
R
E
R
R
O
R
3
F
L
A
S
H
E
S
=
1
S
T
S
T
A
G
E
P
R
E
S
S
U
R
E
S
W
I
T
C
H
S
T
U
C
K
O
P
E
N
/
I
N
D
U
C
E
R
E
R
R
O
R
5
F
L
A
S
H
E
S
=
O
P
E
N
R
O
L
L
O
U
T
/
O
P
E
N
F
U
S
E
D
E
T
E
C
T
E
D
6
F
L
A
S
H
E
S
=
P
R
E
S
S
U
R
E
S
W
I
T
C
H
C
Y
C
L
E
L
O
C
K
O
U
T
7
F
L
A
S
H
E
S
=
E
X
T
E
R
N
A
L
L
O
C
K
O
U
T
(
R
E
T
R
I
E
S
)
9
6
5
7
8
8
F
L
A
S
H
E
S
=
E
X
T
E
R
N
A
L
L
O
C
K
O
U
T
(
R
E
C
Y
C
L
E
S
)
9
F
L
A
S
H
E
S
+
G
R
O
U
N
D
I
N
G
O
R
R
E
V
E
R
S
E
D
P
O
L
A
R
I
T
Y
1
0
F
L
A
S
H
E
S
=
G
A
S
F
L
O
W
W
I
T
H
N
O
C
A
L
L
F
O
R
H
E
A
T
1
1
F
L
A
S
H
E
S
=
L
I
M
I
T
S
W
I
T
C
H
O
P
E
N
-
B
L
O
W
E
R
F
A
I
L
U
R
E
1
2
F
L
A
S
H
E
S
=
I
G
N
I
T
O
R
R
E
L
A
Y
F
A
I
L
U
R
E
1
1
1
0
1
2
3
D
O
U
B
L
E
F
L
A
S
H
E
S
=
2
N
D
S
T
A
G
E
P
R
E
S
S
U
R
E
S
W
I
T
C
H
S
T
U
C
K
O
P
E
N
/
I
N
D
U
C
E
R
E
R
R
O
R
3
F
L
A
S
H
E
S
=
W
2
P
R
E
S
E
N
T
W
I
T
H
N
O
W
1
2
F
L
A
S
H
E
S
=
N
O
R
M
A
L
O
P
E
R
A
T
I
O
N
W
I
T
H
C
A
L
L
F
O
R
2
N
D
S
T
A
G
E
H
E
A
T
1
F
L
A
S
H
=
N
O
R
M
A
L
O
P
E
R
A
T
I
O
N
W
I
T
H
C
A
L
L
F
O
R
1
S
T
S
T
A
G
E
H
E
A
T
(
W
1
)
2
4
3
1
4
F
L
A
S
H
E
S
=
Y
P
R
E
S
E
N
T
W
I
T
H
N
O
G
C
A
L
L
,
Y
L
O
P
R
E
S
E
N
T
W
I
T
H
N
O
G
C
A
L
L
A
M
B
E
R
L
E
D
F
L
A
S
H
C
O
D
E
R
A
P
I
D
=
L
O
W
F
L
A
M
E
S
E
N
S
E
C
U
R
R
E
N
T
R
A
P
I
D
=
N
O
R
M
A
L
O
P
E
R
A
T
I
O
N
W
I
T
H
C
A
L
L
F
O
R
F
A
N
(
G
)
S
T
E
A
D
Y
O
N
=
S
T
A
N
D
B
Y
1
F
L
A
S
H
=
N
O
R
M
A
L
O
P
E
R
A
T
I
O
N
W
I
T
H
C
A
L
L
F
O
R
L
O
W
S
T
A
G
E
C
O
O
L
(
Y
L
O
+
G
)
0
2
1
G
R
E
E
N
L
E
D
F
L
A
S
H
C
O
D
E
2
F
L
A
S
H
E
S
=
N
O
R
M
A
L
O
P
E
R
A
T
I
O
N
W
I
T
H
C
A
L
L
F
O
R
H
I
G
H
S
T
A
G
E
C
O
O
L
/
O
R
S
I
N
G
L
E
S
T
A
G
E
C
O
O
L
I
N
G
(
Y
+
G
)
0
1
.
S
E
T
H
E
A
T
A
N
T
I
C
I
P
A
T
O
R
O
N
R
O
O
M
T
H
E
R
M
O
S
T
A
T
A
T
0
.
7
A
M
P
S
.
N
O
T
E
S
:
2
.
M
A
N
U
F
A
C
T
U
R
E
R
'
S
S
P
E
C
I
F
I
E
D
R
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