Service Manual

71
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
WIRING DIAGRAMS
* M EC96 - REV AB
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
RD
RD
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
0140F02058-A
BR
PK
GY
OR
GN
BL
YL
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
INTEGRATED CONTROL MODU LE
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
INTEGRATED CONTROL MODU LE
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
T4
T1
T2
OR
BR
BK
WH
WH
WH
WH
PU
GY
YL
OR
BR
PK
RD
WH
BK
PU
GY
BR
OR
RD
BK
OR
BL
RD
WH
WH
T3
COM
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 VOLTAG
E
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
E P L
A
C E M E N T P A R
T
S M
U S T
B
E
U
S E D
W
H E
N S E R
V I C
I N G
.
M
U
S T B E R E P
L A C
E D I T M U S T
B
E R E P L A C E D
W I
T H W I
R
I N G M
A
T E R I A L
H
A V I N G A
T E M P E R
A T
U
R E R
A T I N G O
F
A
T
L E A
S
T 1
0
5
C
.
U S E C
O P P E R
C O N D U
C T O R S
O N L Y .
4 . U N I T
M
U
S T B
E P E R M A N E
N T L
Y
G
R
O
U
N D E D A N D C O N F O R M T O N .
E
. C .
A N
D L O
C
A L C O D E S .
5 . T O R E C
A L
L T H
E
L A
S T
6 F A U
L
T
S
, M O S
T
R
E C E N
T T O
L E A S T R E C E N
T
,
D E P
R E
S S S
W I T C H F O
R M O R E
T
H A N
2 S E C O N
D S W H I
L
E
I N S
T A N
D B Y
( N O
T H
E R M O S T A
T I N
P U T
S )
3
.
I F A N
Y O F
T H
E O R I G I N A
L
W
I R E
A S S U P P L I E D
W
I
T H T H E F
U R
N A C E
S 2
S
3