39
Electrical Information
Figure 42
Figure 42.
M4RC & M4RL Wiring Diagram
710915C
04/11
FIELD
WIRING
LEGEND:
LO
W
VO
LT
AG
E
HIGH
VO
LT
AG
E
WIRING DIA
GRAM
For 80+ and 90+
Single Stage Furnaces
Refer to the Installation Instructions
pr
o
vided with the furnace f
or the
pr
oper heating and cooling speeds
for 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 of at least 105 C.
Use copper conductor
s on
ly
.
Diagnostic Descriptio
n
Green LE
DR
ed LE
D
Control Fault (No Power)
Of
fO
ff
L1 / Neutral Polarity Faul
tF
lash
Flas
h
1 Hour Lockou
t
n
O
n
O
n
oit
ar
e
p
O l
a
mr
o
N
Pressure Switch Closed Faul
tO
nF
lash
Pressure Switch Open Faul
tF
lash
On
Open Limit Switch Faul
tF
lash
Of
f
Diagnostic Descriptio
n
Low Flame Sensor Signal
Flame Presen
t
FAULT CONDITIONS
Yellow LE
D
Continuous Flas
h
On
Alternating Flas
h
(Replaces 710915B)
IGNI
TO
R
INDUCER
FLAME SENSOR
C
BLO
WER
LIMIT
DOOR
SWITCH
R
4 SPEED MO
TO
R
WHITE
RED
BLUE
ORANGE
BLAC
K
GAS
VA
LV
E
H
MH
ML
L
C
FLAME
ROLLOUT
SUPP
LY
AIR LIMIT
VENT LIMIT SWITCH
(ON SELECT MODELS)
R C Y G W
LOW
ML
MH
HIGH
EAC
L1
XFMR
HUM
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
COM
GREEN
YELLO
W
RED
3 AMP FUSE
24V
12
34
24
V
120
V
WHITE
BL
AC
K
WHITE
W/ BLK STRIPES
BLK
W/
WHITE STRIPES
1234
123
4
R
C
TX
RX
W
COM
11
22
33
44
55
66
77
88
99
L1A
NEUTRALS
1
2
1
2
1
2
1
2
GREEN
BL
AC
K
WHITE
ORANGE
BLUE
YELLO
W
RED
ORANGE
BL
AC
K
WHITE
BLUE
ORANGE
BL
AC
K
RED
BL
AC
K
BL
AC
K
BL
AC
K
BLUE
BLUE
BLUE
BLUE
BLUE
GREEN
BLUE
BLAC
K
BLO
WER
DECK LIMIT
(ON SELECT
MODELS)
BL
OW
ER
LIMIT
PRESSURE
SWITCH
(ON SELECT
MODELS)
PRESSURE
SWITCH
BLUE
BLUE
SINGLE ST
AG
E
THERMOS
TA
T
TO OUTDOOR UNIT
WHITE (NEUTRAL)
BL
AC
K 120V
GR
OUND
ORANGE
BLAC
K
WHITE
BL
AC
K
WHITE
YELLO
W
Summary of Contents for M4RC-072D-35C
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