Two- Stage Multi Position Furnace
Service Manual
57
440 08 2002 02
ALWAYS CHECK CURRENT TECHENICAL SUPPORT MANUAL
Wiring Diagram (1 HP DC Blower Motor) *9MPV075, 100 & 125(A2)
12
30 SEC.
12
12
12
12
2 STAGE
4
3
12
SINGLE STAGE
4
3
L
IMIT
M
AI
N
12
1
*
2-STAGE
4
2
ST
AGE
P
2
INTERN
AL CIRCUIT BOAR
D W
IRING
LO
W VOLTAGE F
IELD
LO
W VOLTAGE FACTORY
LINE VOLTAGE F
IELD
LINE VOLTAGE FACTOR
Y
COLOR
CODE
8
2
N
HUM
N
EAC
24V
N
HUM
ON
3 4
4
3
SETTING
FACTORY
4
60 SEC.
3
3
100 SEC.
4
H
OT
1
15V
-6
0H
Z
N
E
U
TR
A
L
DANGER:
ELECTRI
CAL
SHOCK HAZARD
DISCON
NECT BEFORE
S
E
RVICING
GND.
SW
IT
C
H
INTE
R
LO
C
K
CON
NEC
TION DI
A
GRAM
S
W
ITC
H
IN
TE
RLO
C
K
BOX
CONNEC
TION
FIELD
COOL OFF DELAY: 60 SEC
COOL ON DELAY: 5 SEC
1013375-
B
SEE M
ANUALS
FOR ADJ
USTING
SWITCH
ES FOR
PROPER
HEATING
, COOLIN
G & CIRC
ULATING SPEEDS
.
S1
L1
EAC
C
A
PACI
TOR
(S
O
M
E
M
O
D
E
LS
)
N
LADDER DIA
GRAM
60
H
Z
11
5V
3
3 4
4
G
Y
G
R
W
1
W
2
G
Y
C
R
R
S
W
IT
C
H
PR
E
S
SU
RE
L
OW
3
2
3
8
7
+
VALVE
GAS
-
2
6
2
3
4
1
5
1
O
N
R
Y
4
BK
9
BK
HO
T
8
5
W
6
51
GN
D
6
2
2
BL
7
3
NE
U
TRA
L
84
3
1
Y
TH
E
R
M
O
STAT
S
IN
G
LE
STA
GE
R
R
Y
BL
BK
Y
W
W
BL
BK
IND LOW
HEAT LOW
5A FU
SE
W
2
W
1
G
BL
R
BR
Y
BK
C
G
G
Y
W1
R
W2
24V
S
E
C
O
N
D
A
RY
115V
P
RI
M
A
R
Y
FAN CONTROL MODULE
12
140 SEC.
60 SEC.
180 SEC.
4
3
12
1
8
FURNA
CE CONT
ROL
R
SW
ITCH
PR
ESSUR
E
H
IG
H
R
GAS
VA
LVE
R
S
W
IT
C
H
PR
ESSUR
E
LO
W
M
A
IN
L
IM
IT
BL
3
6
4
7
THE
R
M
O
STAT
2-
STA
G
E
2
VALVE
GAS
5
R
N
BL
BL
N
SE
N
S
O
R
1
2
3
4
L1
IGNIT
E
R
BK
W
+
2
ST
AGE
BK
P
BL
(LP MOD
ELS ONL
Y)
SWIT
CH
LP PRE
SSURE
4
2
4
L1
H
E
A
T H
I
IND HI
C
O
O
L
E
A
C
H
U
M
C
O
N
T
IND IN
R
W
W
O
W
W
P1
W
MOTO
R
INDU
CER
M2
M1
W
L1
XFMR
O
L1
BK
BK
1
4
4
P1
2
1
5
3
7
4
6
5
3
6
9
1
W
1
Y
W2
G
TR
ANSFORM
ER
Y
W
LINE
120 VAC
XFMR DC MTR
P1
CO
M
3
NEUT
RAL
2
1
VAC
24
4
7
P
2
Y
2
C
R
(OPTION
AL)
HUMIDIS
TAT
W
G
1
2
3
4
Y
Y
W1
G
TRANS
FOR
MER
HIGH
INDH
M
OTOR
IN
DU
CE
R
LO
INDIN
INDL
1
2
3
4
3 1
115V
R
R
C
OM
BR
24
V
A
C
BR
5 A FU
SE
24VA
C
IG
N
IT
E
R
SENSOR
2
STAGE
- +
-
S
H
IE
LD
B
EA
D
G
BL
IF ANY OF T
HE ORIGINAL W
IRE AS SUPPLIED W
ITH THE AP
PLIANCE
M
UST
BE
RE
PLAC
ED, IT MUST BE
RE
PLACED WITH TYPE AW
M-105º
C W
IRE OR EQUIV.
S
H
IE
LD
B
E
A
D
11
5V
H
O
T
JU
M
P
E
R
, S
U
R
G
E
JU
M
P
E
R
, S
U
R
G
E
11
5V
N
E
U
TR
A
L
JU
M
P
E
R
, 1
15
V
JU
M
P
E
R
, 1
15
V
DC MOT
OR
CONTR
OL
*AIRFLOW
DIP SWITCHES
THERMOSTAT TYPE
HEAT ON DELAY
HEAT OFF DELAY
R
O
LL
O
U
T S
W
IT
C
H
1
T
O
3
IN
S
E
R
IE
S
D
EP
E
N
D
IN
G
O
N
M
O
D
E
L
H
IG
H
P
R
E
S
S
U
R
E
S
W
IT
C
H
R
O
LL
O
U
T S
W
IT
C
H
1
TO
3
IN
S
E
R
IE
S
D
E
P
E
N
D
IN
G
O
N
M
O
D
EL
C
A
PA
C
IT
O
R
(S
O
M
E M
O
D
ELS
)
(HI VOLT
FIELD)
COPPER CONDUC
TORS
ONLY
CIRCUIT
BOARD
1 4
23 5
6
G
BL
Y
R
G
BL
Y
R
DC
BL
O
W
ER
MOTO
R
5 4 3 2 1
10 9 8 7 6
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5 6 7 8
MOTOR
BLOWER
DC
*AIRFLOW
DIP SWITCHES
DC MOT
OR
CONTR
OL
JU
M
P
E
R
, 1
15
V
JU
M
P
E
R
, 1
15
V
11
5V
N
E
U
TR
A
L
JU
M
P
E
R
, S
U
R
G
E
JU
M
P
E
R
, S
U
R
G
E
11
5V
H
O
T
5 4 3 2 1
10 9 8 7 6
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5 6 7 8
5 4 3 2 1
10 9 8 7 6
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5 6 7 8
MOTOR
BLOWER
DC
*AIRFLOW
DIP SWITCHES
DC MOT
OR
CONTR
OL
JU
M
P
E
R
, 1
15
V
JU
M
P
E
R
, 1
15
V
11
5V
N
E
U
TR
A
L
JU
M
P
E
R
, S
U
R
G
E
JU
M
P
E
R
, S
U
R
G
E
11
5V
H
O
T
LP
P
R
E
S
S
U
R
E
S
W
IT
C
H
(LP
M
O
D
E
LS
O
N
LY
)
W
2
BLACK BLUE BROWN GREEN ORANGE RED WHITE YELLOW PURPLE
BK BL BR G O R W Y P
EAC + HUM: 0.8 A MAX. COMBINED
THERMO
STAT
1
2
NOTE: M
OST VOL
T METER
S WILL R
EAD 13-1
6 VOLTS TO
CHASSIS
ON BOT
H SIDES
OF AN O
PEN LIMI
T OR PR
ESSURE
SWITCH
IN THE R
ECTIFIE
D AC VO
LTAGE CIRCUIT
RE
CTIFIED AC VOLTAGE FA
CTORY