43
Figure 33. Wiring Diagram for Two-Stage, Fixed Speed Downfl ow Furnaces
FLAME
R
O
LL-OUT
SUPPL
Y
AIR LIMIT
LO
W
PRESSURE
SWITCH
HIGH
PRESSURE
SWITCH
11
22
33
44
55
66
77
88
99
R
C
GND
RX
TX
W
R
C
Y1
TWIN
DEHUM
HP
SPEED
COMMON
PWM
MODE
NONE
NONE
R
C
GND
RX
TX
W
W
FLAME SENSOR
24 V
120 V
WHITE
BLA
CK
WHITE
W/ BLK STRIPES
BLK W/ WHITE
STRIPES
1234
1234
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
TO
R
Q
U
E
MO
T
O
R
BLA
CK
WHITE
BLACK
WHITE
BLO
W
ER
LIMIT
BLO
W
ER
LIMIT
WHITE
ORANGE
YELLO
W
RED
BLA
CK
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
WHITE
ORANGE
YELLOW
RED
BLACK
BLA
CK
WHITE
BLUE
ORANGE
BLUE
YELLO
W
WHITE
RED
BLA
CK
BLACK
BLACK
GAS
VA
LV
E
HI
LO
C
INDUCER
H
L
C
12
3
12
3
COOL
FAN SPEED
HEAT
BL
WR OFF
DELA
Y
RED
RED
RED
PA
R
T
O
F
MO
T
O
R
1
2
3
1
2
3
BLO
W
ER DECK
LIMIT
BLUE
For 80+ and 90+ 2-Sta
g
e
Fix
ed Speed Do
wnflo
w Furnaces
WIRING DIA
GRAM
7109170
FIELD WIRING
LEGEND:
0409
LO
W V
O
LT
A
G
E
HIGH V
O
LT
A
G
E
BLUE
BLUE
BLUE
BLUE
BLA
CK
BLA
CK 120V
WHITE
BLA
CK
BLAC
K
BLACK
BLACK
BLAC
K
BLAC
K
WHITE
WHITE
(NEUTRAL)
BLA
CK
WHITE
WHITE
RED
RED
GREEN
GR
OUND
GREEN
BR
O
W
N
BR
O
W
N
YELLO
W
VIOLET
VIOLET
ORANGE
ORANGE
VENT LIMIT
(ON SELECT
MODELS)
MO
T
OR CHOKE
(ON 3/4 AND 1HP
MODELS ONL
Y
)
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
u
st 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
g
ram 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
or the
furnace
.
G
reen LED
R
ed LED
Co
ntrol
Fau
lt (No
P
o
wer)
Off
O
ff
L1 / Neutr
a
l Polar
ity
Fault
F
las
h
Flas
h
1 Hour
Loc
k
o
ut
Normal O
p
eration
O
n
O
n
Pres
s
u
re Switc
h
Clos
ed Fault
O
n
F
las
h
Pr
es
s
u
re
Switc
h
O
p
en F
ault
F
las
h
O
n
O
pen Limit Switc
h
Fault
F
las
h
O
ff
Low Flame Sens
or
Signal
Flame Pres
ent
Diagnostic Descr
iption
FAULT CONDITIONS
Diagnostic Descr
iption
Yello
w
L
E
D
Continuous
Flas
h
On
Alternating Flas
h
Motor Faul
t
On
Off
¢7109171¤
