44
Figure 34. Wiring Diagram for Two-Stage, Variable Speed Upfl ow Furnaces
FLAME
R
OLL-OUT
SUPPL
Y
AIR LIMIT
PRESSURE
SWITCH
PRESSURE
SWITCH
PRESSURE
SWITCH
PRESSURE
SWITCH
FLAME SENSOR
GAS
VA
L
V
E
HI
LO
C
11
4
1
8
7
10
5
2
9
3
12
6
LINE- N
XMFR-N
LINE
LINE
XMFR
EAC
HUM
LINE- N
14
3
25
R
C
TX
RX
W
COM
IGNITOR
DOOR
SWITCH
R
C
Y/Y2
W2
GW
1
Y1
1
2
1
2
LO
W
HIGH
BLO
WER
LIMIT
BLO
WER
LIMIT
CFM
MOTOR
GND
SEN
DHUM
Y1
H
L2-OUT
L2-IN
L1-IN
L1-OUT
Y1
Y/Y2
W
C
R
HP
SPEED
COMMON
PWM
MODE
OPEN
OPEN
FA
U
L
T
R
C
GND
RX
TX
W
C
DX-
DX+
R
RED
GREEN
24 V
120 V
WHITE
BLA
CK
WHITE
W/ BLK STRIPES
BLK W/ WHITE
STRIPES
1234
1234
INDUCER
H
L
C
12
3
12
3
BLA
C
K
WHITE
BLA
C
K
BLA
C
K
11
22
33
44
55
66
77
88
99
1
2
3
4
5
6
1
2
3
4
5
6
COOL
FAN SPEED
HEAT
BL
WR OFF
DELA
Y
RED
RED
RED
P A
RT
OF
MOT
OR
123
123
BLUE
BLUE
BLUE
BLUE
BLUE
BLA
CK
WHITE
BLAC
K
BLAC
K
BLAC
K
BLAC
K
WHITE
BLA
CK
WHITE
WHITE
RED
RED
GREEN
GREEN
BR
O
W
N
BR
O
W
N
YELLO
W
VIOLET
VIOLET
ORANGE
ORANGE
VENT LIMIT
(ON SELECT
MODELS)
BLA
CK 120V
WHITE (NEUTRAL)
GR
OUND
CONDENSA
TE
(ON SELECT
MODELS)
BLA
CK
VIOLET
For 80+ and 90+ 2-Sta
g
e
V
a
riab
le Speed Upflo
w Furnaces
WIRING DIA
GRAM
7109180
FIELD WIRING
LEGEND:
LO
W V
O
L
T
A
G
E
HIGH V
O
L
T
A
G
E
Ref
er to the Installation Instructions
pr
o
vided with the kit f
or the pr
oper
heating and cooling speeds f
or y
our
application.
If an
y of the origInal wire as supplied with the
furnace m
ust be replaced,
it m
ust be replaced
with wiring material ha
ving a temperature
rating of at least 105° C.
Use copper conductor
s onl
y
.
This wiring dia
gram sho
ws connections and
termination required f
or the b
lo
wer kit onl
y
.
Use in ad
dition to the wiring dia
gram f
o
r the
furnace
.
¢7109187¤
G
reen LED
R
ed LED
Control Fault (No Power)
O
ff
O
ff
L1 / Neutral Polarity
Fault
F
las
h
Flas
h
1 Hour Loc
k
out
Normal Operation
O
n
O
n
Pres
s
u
re Switc
h
Clos
ed Fault
O
n
F
las
h
P
re
s
su
re
S
w
it
ch
Op
e
n
Fa
u
lt
F
la
sh
On
Open Limi
t Swi
tc
h
Faul
t
F
la
s
h
Off
Low Flame Sens
or Signal
Flame Pres
ent
Diagnostic Descr
iption
FAULT CONDITIO
NS
Diagnostic Descr
iption
Yellow LED
Continuous
Flas
h
On
Alternating Flas
h
Motor Fault
On
Off
0409
ORANGE
MO
T
OR CHOKE
(ON 3/4 AND 1HP
MO
T
ORS ONL
Y)
BLUE
BLUE
BLA
C
K
WHITE
BLA
C
K
WHITE
BR
O
W
N
RED
ORANGE
YELLO
W
GREEN
BLUE
BR
O
W
N
RED
ORANGE
YELLO
W
GREEN
BLUE
