035-17468-001 Rev. A (801)
Unitary Products Group
39
WIRING DIAGRAM - UPFLOW MODELS
NOTE:
The furnace’s control system requires correct polarity of the power supply.
FIGURE 42 :
Upflow Models
BLU/WHT
ELEMENT
AR
Y
D
IAGRAM
ELEMENT
AR
Y
DIAGRAM
NOTES:
LEGEND
--
CAUTION
--
CAUTION
WHT
BLU/WHT
BLK
BLK
BLK
WHT
BLK
WHT
WHT
BLK
CONNECTION
DIAGRAM
CONNECTION
DIAGRAM
WHT
WHT
BLK
WHT
BLK
WHT
BLK
BLK
BLK
WHT
BLK
WHT
OPEN
ALL
DISCONNECTS
BEFORE
SER
VICE
THIS
UNIT
FUSE
1LP
PRESSURE
SW
,
FIRST
ST
AGE
2LP
PRESSURE
SW
,
SECOND
ST
AGE
1T
TRANSFORMER
40V
A
24V
CONNECTION
ROOM
THERMOST
AT
FIELD
CONNECTION
F
ACT
OR
Y
WIRING
AND
DEVICES
FIELD
WIRING
AND
DEVICES
RELA
Y
CONT
ACTS
ON
IGNITION
CONTROL
BOARD
DS
DISCONNECT
SWITCH
GV
GAS
vAL
VE
IGN
HOT
SURF
ACE
IGNIT
OR
P1/S1
-
1
2
PIN
PLUG
&
SOCKET
ON
IGN.
CONTROL
BOARD
P2/S
2
-
5
PIN
PLUG
&
SOCKET
ON
IGN.
CONTROL
BOARD
P3/S
3
-
2
PIN
PLUG
&
SOCKET
A
T
HOT
SURF
ACE
IGNIT
OR
P4/S
4
-
3
PIN
PLUG
&
SOCKET
A
T
INDUCER
MOT
OR
P5/S5
3
PIN
PLUG
&
S
OCKET
ON
V
A
LV
E
P6/S
6
-
6
PIN
PLUG
&
S
OCKET
ON
CFM
TIMER
BOARD
P7/S7
-
1
6
PIN
PLUG
&
SOCKET
FOR
MOT
OR
P8/S8
5
PIN
PLUG
&
SOCKET
ON
ICM
BLOWER
MOT
OR
P9/S9
-
1
6
PIN
PLUG
&
SOCKET
ON
CFM
TIMER
BOARD
Ls1
-
PRIMAR
Y
LIMIT
SWITCH
ROS1
-
ROLL
OUT
SWITCH,
LEFT
SIDE
90%
UPFLOW
TWO-ST
AGE
FURNACE
-
V
ARIABLE
SPEED
ALL
FIELD
WIRING
PER:
(A)
NA
TIONAL
ELECTRICAL
CODE
(NEC)
AND/OR
(B)
CANADIAN
ELECTRICAL
CODE
(CEC)
AND/OR
(C)
LOCAL
OR
CITY
CODES.
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
22.1°F
(105
HA
VING
A
TEMPERA
TURE
RA
TING
OF
A
T
LEAST
221°C).
CONNECTIONS
SUIT
ABLE
FOR
COPPER
CONDUCT
ORS
ONL
Y.
ALL
REPLACEMENT
COMPONENTS
MUST
BE
PROPERL
Y
GROUNDED.
PROVIDE
DISCONNECTS
FOR
ALL
POWER
SUPPLIES.
MOT
ORS
ARE
INHERENTL
Y
PEOTECTED.
TIMER
JUMPER
MUST
BE
IN
OFF
POSITION
WHEN
USING
A
TWO
ST
AGE
THERMOST
AT
.
1.
2.
3.
4.
5.
6.
7.
P8/S8
ICM
BLOWER
MOT
OR
GRN
GND
S7
120V
AC
LINE
GND
GRN
BRN
GRN
GND
VENT
OR
MOT
OR
HOT
SURF
ACE
IGNITER
REDRED
P4/S4
1
3
2
BRN
WHT
RED
P3/S3
120
VA
C
120
VA
C
1
2
BRN
120V
RED
RED
BRN
BRN
RED
NO
C
DOOR
N.O.
SW
24V
SEC
PRI
COM
1
2
BLU
YEL/BLK
BRN
WHT
BRN
BRN
RED
BLK
BLK
COOL
HEA
T
L
O
HEA
T
H
I
LINE
XFMR
CIRC
IN
EAC
HUM
H
O
T
1
2
0
V
A
C
3A
P2/S2
1
2
4
3
5
LINE
XFMR
EAC
HUM
N1
E2 UO T RV AA LC
P1/S1
W1
W2
Y
R
G
B
BLU
RED
BLU
BLU
12
11
10
7
8
9
6
3
2
5
4
1
GRN
RED
LS1
1LP
NO
C
BLU
ROS1
FLAME
SENSOR
PUR
ORG
2LP
NO
C
YEL
M
C
HI
MAIN
2S
T
A
G
E
P
5
/
S
5
GAS
V
A
LV
E
GND
GRN
GRN
EAC
HUM
POWER
SUPPL
Y
120-1-60
SEE
NOTE
1
BLOWER
MOT
OR
EAC
HUMIDIFIER
DS
HIGH
EAC
HUM
LOW
VENT
OR
MOT
OR
IGN
N.O.
SW
DOOR
SWITCH
NO
C
IGNITER
RELA
Y
120V
PRI
COM
1T
(40V
A)
24V
SEC
3A
ON
AUT
O
COOL
OFF
HEA
T
HEA
T/COOL
THERMOST
AT
W
Y
G
R
R
B/C
G
Y
W1
W2
GRN
GV
LS1
ROS1
1LP
1ST
ST
AGE
2ND
ST
AGE
2LP
NO
C
NO
C
GRN
RED
P6
3
6
YEL/BLK
1
4
SEE
NOTES
MINUTESELECT
W2
W1
S6
S9
CFMTIMER
BOARD
ADJ
DELAY
HEAT
COOL
HUMIDISTAT
HEAT
PUMP
HUM
TIMEROFF
Y2
Y1
Y
W1
R
W2
C
G
O
X/L
1
9
ORG
BLK
BRN
RED
YEL
GRN
YEL/BLK
BRN
8
16
P7
BLK
WHT
BLK
RED
WHT
YEL
PUR
BLK
9
1
P9
16
8
ORG
BLK
BLK
BLK
RED
RED
YEL
YEL
PUR
GRN
YEL/BLK
BLK
BRN
WHT
BLU
