Service manual
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.
26
WIRING DIAGRAMS
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
T
O
+
V
D
C
T
O
M
I
C
R
O
T
O
R
G
N
D
(
4
)
+
V
DC
(
1
)
R
X
(
2
)
T
X
(
3
)
C
I
R
C
U
L
A
T
O
R
I
N
D
O
O
R
A
I
R
B
LW
R
RD
G
Y
B
L
B
K
H
U
M
I
D
I
F
I
E
R
G
N
D
P
R
O
T
E
C
T
I
O
N
D
E
V
I
C
E
HEAT OFF
DELAY
B
U
R
N
E
R C
O
M
P
A
R
TM
E
N
T
2
4
V
3
A
B
L
G
P
O
W
E
R
S
U
P
P
L
Y
W
I
T
H
L
I
N
E
RD
12
TO
C
2
B
K
R
D
UNUSED
4
I
G
N
I
T
E
R
FLAME SENSOR
INTEGRATED CONTROL MODULE
BR
YL
T
E
R
M
I
N
A
L
H
I
BL
O
R
OR
A
N
G
E
MVH (14)
PM
E
C
M
M
T
R
H
A
R
N
E
S
S
NO
24 VAC
H
I
V
O
L
T
A
G
E
F
I
E
LD
115kBT U MO DELS
DIP SWITCHES
PS1 (2)
3
Y
L
Y
E
L
L
O
W
CIRCULATOR
B
K
B
R
B
R
O
WN
4
B
K
O
V
E
R
C
U
R
R
E
N
T
24V HUM.
0
1
4
0
F
0
0
6
0
6
R
E
V
.
A
IGNITER
1
1
5
V
A
C
/
1
B
L
O
W
E
R C
O
M
P
A
R
T
M
E
N
T
BK
PM
1
WH WHITE
BK
FUSE
15
EAC
C
2
BL BLUE
6
115 VAC
INDUCTOR COIL
WH
YL
GND
5. TO RECALL THE LAST 6 FAULTS, MOST RECENT TO LEAST
RECENT, DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE
IN STANDBY (NO THERMOSTAT INPUTS)
Ø /60 HZ POWER SUPPLY WITH
A
DJUST
TO 115VAC/ 1
BK BLACK
D
E
H
U
M
5
HEAT
LINE
INTEGRATED CONTROL MODULE
GND
24V HUM.
2
WH
BK
MVC (8)
2
NEUTRAL
RD
WH
DOOR
LOW FIRE PRESS.
SWITCH
4
3
2
CHASSIS GROUND
WH
LOW VOLTAGE (24V)
HUM
DEHUM
2
HI VOLTAGE (115
V)
PSO (7)
WH
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE
USED WHEN SERVICING.
ONLY
C
A
IR CLEANER
HIGH FIRE
PRESS. SWTICH
INDOOR
HUMIDIFIER
PK PINK
WH
9
IND LO
14
Y2
40 VA
3
HUM
YL
JUNCTION
BLWR
PU PURPLE
1
CIRCULATOR
BLOWER
R
1
JUNCTION BOX
SWITCH (TEMP.)
NEUTRAL
115kBTU MODELS
BLOWER
COMPARTMENT
DOOR SWITCH
(OPEN WHEN
DOOR OPEN)
C
LINE
YL
NEUTRAL
4
NEUTRAL
11
C
FS
2
PLUG CONNECTION
EAC
DISCONNECT
PU
3. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE
FURNACE MUST BE REPLACED, IT MUST BE REPLACED WITH
WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT
LEAST 105°C. USE COPPER CONDUCTORS ONLY.
RD
INTEGRAT
ED CO
NTROL
PROT. DEVICE
8
WH
ONLY
2
4
V
T
H
E
R
M
O
S
T
AT
C
O
N
N
E
C
T
I
O
N
S
W1
W1
INTERN
AL
TO
70kBTU,90kBTU,
NO
EQUIPMENT GND
MVL (13)
O
2ND STG DLY
WH
RD
YL
R
BL
2
5
GND (5)
BK
IND HI
IGN
PK
HLO (10)
70kBTU,90kBTU,
NOTES:
PU
A
IR
Y1
Y1
GY GRAY
ELECTRONIC
RD RED
Y2
RD
NEUTRAL
1
HLI (1)
WH
SWITCH
NO
WH
TRANSFORMER
13
1
OR
3
OVERCURRENT PROTE
CTI
ON DEV
ICE
T- STAT
5
BR
BK
GN
3
LOW VOLTAGE FIE LD
W2
DELAY
7
FIELD G
ND
FIELD SPLICE
SWITCH (PRESS
.)
1
C
W2
WH
NEUTRAL
BLWR
JUNCTION BOX
3
GND
F
S
1
4
BK
GAS
VALVE
24V T HERMOSTAT CONNECTIONS
PU
INDUCTO
R COI
L
TH (4)
C
HI
1
24V HUM.
G
YL
C
TR (11)
YL
GR
GN GREEN
HOT SURFACE
P
S
2
(
1
2
)
1
INTEGRATED CONTROL MODULE
COLOR CODES:
4. UNIT MUST BE PERMANENTLY GROUNDED AND CONFOR
M T
O
N.E.C. AND LOCAL CODES.
YL
DIAGNOSTIC
LED'S
RD
O
3
DEHUM
10
OR
N
O
NEUTRAL
SEE
NOTE 5
WH
COOL
ID
TO
MICRO
PU
AUTO RESET
AUXILIARY
LIMIT CONTROL
YL
1. SET HEAT ANTICIPATOR ON RO
OM THERMO
STAT AT 0.7 AMPS.
FUSE 3 A
2
*MVC8***AA Models