035-17438-001 Rev. A (901)
26
Unitary Products Group
WIRING DIAGRAM
NOTE:
The furnace’s control system depends on correct polarity of the power supply.
X/L
O
C
G
W2
W1
R
Y
Y1
Y2
ADJ
DELAY
HEAT
RED
P6
YEL/BLK
RED
GRN
6
4
3
1
16
8
9
1
16
8
9
1
BLK
BLK
BLK
P7
PRP
YEL
WHT
RED
BLK
WHT
BLK
ORN
BLK
BRN
RED
BRN
YEL
GRN
YEL/BLK
CFM/TIMERBOARD
W1
W2
MINUTESELECT
HUMIDISTAT
HEATPUMP
COOL
HUM
S6
S9
P9
BLU
BLU/WHT
PUR
YEL
WHT
RED
BLK
ORN
BLK
BRN
RED
YEL
GRN
YEL/BLK
BLK
S7
P8/S8
ROS3
FA
N
SWITCH
OFF
AUT
O
COOL
1
COOL
2
HEA
T
2
HEA
T
1
HIGH
LIMIT
HIGH
LIMIT
OFF
COOL
AUT
O
Y2
RC
G
G
RELA
Y
CONT
ACTS
ON
IGNITION
CONTROL
BOARD
C
2LP
NO
6.
MOT
ORS
ARE
INHERENTL
Y
PROTECTED.
5.
PROVIDE
DISCONNECTS
FOR
ALL
POWER
SUPPLIES.
4.
ALL
REPLACEMENT
COMPONENTS
MUST
BE
PROPERL
Y
GROUNDED.
3.
CONNECT
ORS
SUIT
ABLE
FOR
COPPER
CONDUCT
ORS
ONL
Y.
2.
IF
ANY
OF
THE
ORIGINAL
WIRE
AS
SUPPLIED
WITH
THE
FURNACE
MUST
BE
REPLACED,
IT
MUST
BE
REPLACED
WITH
WIRING
MA
TERIAL
HA
VING
A
TEMPERA
TURE
RA
TING
OF
A
T
LEAST
221°F
(105
HA
VING
A
TEMPERA
TURE
RA
TING
OF
A
T
LEAST
221°C).
1.
ALL
FIELD
WIRING
(DENOTED
BY
DASHED
LINES)
PER:
(A)
NA
TIONAL
ELEC.
CODE
(NEC)
AND/OR
(B)
CANADIAN
ELEC.
CODE
(CEC)
AND/OR
(C)
LOCAL
OR
CITY
CODES.
FIELD
CONNECTION
HUM
HUM
EAC
EAC
EAC
HUMIDIFIER
BLOWER MOT
OR
80%
UPFLOW/HORIZONT
AL
DELUXE
FURNACE
-
V
ARIABLE
SPEED
IGNITER
RELA
Y
GV
GRD
N.O.SW
DOOR
SWITCH
ELEMENT
AR
Y
DIAGRAM
ELEMENT
AR
Y
DIAGRAM
POWER
SUPPL
Y
120-1-60
SEE
NOTE
1
GRD
DS
C
NO
COM
120V
24V
SEC
PRI
1T
(40V
A)
R
B
VENT
OR
MOT
OR
IGN
HEA
T
NOTES:
LEGEND
DS
DISCONNECT
SWITCH
GV
GAS
V
AL
VE
IGN
HOT
SURF
ACE
IGNIT
OR
P1/S1
12
PIN
PLUG
&
SOCKET
ON
IGN.
CONTROL
BOARD
P2/S2
5
PIN
PLUG
&
SOCKET
ON
IGN.
CONTROL
BOARD
P3/S3
2
PIN
PLUG
&
SOCKET
A
T
HOT
SURF
ACE
IGNIT
OR
P4/S4
3
PIN
PLUG
&
SOCKET
A
T
INDUCER
MOT
OR
P5/S5
3
PIN
PLUG
&
SOCKET
O
N
VA
LV
E
P6/S6
6
PIN
PLUG
&
SOCKET
ON
CFM/TIMER
BOARD
P7/S7
16
PIN
PLUG
&
SOCKET
FOR
MOT
OR
P8/S8
5
PIN
PLUG
&
SOCKET
ON
ICM
BLOWER
MOT
OR
P9/S9
16
PIN
PLUG
&
SOCKET
ON
CFM/TIMER
BOARD
LS1
PRIMAR
Y
LIMIT
SWITCH
LS2,3
AUXILAR
Y
LIMIT
SWITCH
ON
BLOWER
DECK
ROS1
ROLL
OUT
SWITCH
LEFT
SIDE
ROS2
ROLL
OUT
SWITCH
RIGHT
SIDE
ROS3
ROLL
OUT
SWITCH
T
O
P
MIDDLE
(2-5
CELL)
T
O
P
RIGHT
(5
&
7
CELL)
ROS4
ROLL
OUT
SWITCH
T
O
P
LEFT
(6
&
7
CELL
ONL
Y)
SS1
SPILL
SWITCH
(CHIMNEY
KIT)
-
CAUTION
-
-
CAUTION
-
OPEN
ALL
DISCONNECTS
BEFORE
SER
VICING
THIS
UNIT
FUSE
1LP
PRESSURE
SW
,
FIRST
ST
AGE
2LP
PRESSURE
SW
,
SECOND
ST
AGE
1T
TRANSFORMER,
40V
A
24V
CONNECTION
ROOM
THERMOST
AT
F
ACT
OR
Y
WIRING
AND
DEVICES
-----
FIELD
WIRING
AND
DEVICES
3A
1ST
S
T
AGE
2ND
S
T
AGE
R
C
W1
W2
W1
W2
Y1
Y
LS2
LS3
ROS2
ROS1
ROS4
LS1
HIGH
LOW
GRN
GRD
ICM
WHT
ROS3
P
5
\
S
5
2S
T
A
G
E
GAS
V
A
LV
E
MAIN
120V
AC.
LINE
BLK
BLK
EAC
HUM
2
W
1
B
G
R
Y
W
HUM
EAC
N1
E2
U0
T
RV
AA
LC
H
O
T
1
2
0
V
A
C
C
NO
BLU
BLK
WHT
BLK
ORN
WHT
BLU
WHT
BLK
CIRC
IN
GRD
GRN
GRD
XFMR
NO
C
1LP
CONNECTION
DIAGRAM
RED
P1/S1
HOT
SURF
ACE
IGNITER
WHT
WHT
BLK
WHT
BLK
1
2
1
3
P3/S3
P4/S4
BRN
GRN
GRN
FLAME
SENSOR
BLU
2LP
120
VA
C
120V
COM
24V
SEC
PRI
DOOR
N.O.SW
C
NO
VENT
OR
MOT
OR
GRN
MOT
OR
BLOWER
WHT
BRN
BLK
LINE
1
2
3
4
5
6
7
8
9
10
11
12
PRP
P2/S2
XFMR
LINE
4
3
2
1
HEA
T
H
I
HEA
T
L
O
COOL
5
BLK
2
BRN
RED
BRN
RED
WHT
BLK
RED
WHT
BRN
3A
ROS1
ROS2
LS3
LS2
RED
M
C
HI
ROS4
WHT
120
VA
C
YEL
LS1
RED
YEL
YEL
YEL
BRN
GRD
BRN
BRN
BRN
WHT
RED
BLK
BLK
D
O
T
NO
C
1LP
ICM
YEL/BLK
RED
BLU/WHT
BLU
BLU
ROS3
LS1
WHT
SS1
RED
SEE
NOTE
8
7.
SS1
IN
SERIES
WITH
LS1
AND
ROS3
(FIELD
INST
ALLED).
SS1
SEE NOTE
8
GRN
TIMEROFF
8.
TIMER
JUMPER
MUST
BE
IN
THE
OFF
POSITION
WHEN
USING
A
TWO
ST
AGE
THERMOST
AT
.
SEE
NOTE
9
