28
Figure 33. Emerson Board Wiring Diagram
10436620
(NEW)
07/22
FIELD WIRING
LE
GEND:
LO
W V
OL
TA
GE
HIGH V
OL
TA
GE
WIRING DIA
GRAM
Gas Dir
ect Igni
Ɵ
on Furnace, Hea
Ɵ
ng & A/C R
eady
.
NO
TE
S:
1. Incoming pow
er mus
t be polariz
ed. Obser
ve c
olor coding. (See furnace da
ta label f
or electric
al in
forma
Ɵ
on.)
2. If an
y of the original wir
es (as supplied with the appliance) mus
t be r
eplaced, use 105
C Thermoplas
Ɵ
c type wir
e or its equiv
alen
t.
3. A wir
e fr
om “
Y” on the thermos
ta
t t
o the furnace is r
equir
ed.
Ref
er to the Installation Instructions
pr
ovided 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 onl
y.
Red
LE
D
Flas
h
Er
ror
/C
ondit
ion
1
Sy
st
em
Loc
kout
(R
et
ries
E
xc
eeded)
2
Pr
es
sur
e
Sw
itc
h
St
uc
k
Clos
ed
3
Pr
es
sur
e
Sw
itc
h
St
uc
k
O
pen
4
O
pen
High
Tem
per
at
ur
e
Lim
it S
wit
ch
5
Flam
e
Sens
ed>
4.
25
Sec
onds
w
ith
G
as
V
alv
e
De-
Ener
giz
ed
6
O
pen
Flam
e
RO
S
wit
ch
8
Ignit
or
R
elay
E
rror
10
O
pen
Fus
e
11
Ignit
or
O
pen
12
Induc
er
R
elay
E
rror
7
Low
F
lam
e
Sens
e
Signal
9
Tw
inning
Fault
Cont
rol
Failur
e
/ N
o
Pow
er
/
Int
er
nal
Fault
/
IR
Q
Los
s
G
as
H
eat
ing
Loc
kout
(G
as
v
alv
e
ener
giz
ed
when
it s
hould
be
de-
ener
giz
ed)
O
r G
as
v
alv
e
De-
ener
giz
ed
when
it s
hould
be
Ener
giz
ed
Rapid
Flas
h
Rev
er
se
Polar
ity
Cont
inuous
O
n
Nor
m
al
O
per
at
ion
Flas
h
codes
s
tor
ed
in
m
em
or
y
(aut
o-
er
as
ed
af
ter
14
day
s)
Flas
h
codes
N
O
T
st
or
ed
in
m
em
or
y
O
ff
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
Po
si
tio
n
O
FF
O
FF
O
FF
O
N
O
FF
O
FF
O
N
O
N
O
FF
O
FF
O
N
O
FF
O
FF
O
FF
O
N
O
FF
O
N
O
N
O
N
O
FF
O
N
O
N
O
N
O
N
M
ot
or
SPEED
C
ool
Y
T1
T2
T3
T4
T1
+T2
T1
T1
T1
C
oo
l M
ot
or
SPEED
D
IPSW
IT
C
H
SETT
IN
G
(S1
-1
, S1
-2
, S1
-3
)
1
2
1
2
1
2
1
2
Po
si
tio
n
O
FF
O
FF
O
N
O
FF
O
N
O
N
O
FF
O
N
M
ot
or
SPEED
Heat
W
T1
T2
T3
T4
He
at
M
ot
or
SPEED
D
IPSW
IT
C
H
SET
TI
NG
(S2
-1
, S2
-2
)
1
2
1
2
1
2
1
2
Po
si
tio
n
O
FF
O
FF
O
N
O
FF
O
FF
O
N
O
N
O
N
M
ot
or
SPEED
Fan
G
T1
T2
T4
T1
+T2
Fa
n
M
ot
or
SPEED
D
IPSW
IT
C
H
SET
TI
NG
(S2
-3
, S2
-4
)
T1
T2
T4
X
COM
T3
4
1
8
5
2
9
12
10
3
6
7
11
LINE-N
XF
MR-N
CIRC-N
120V HUM
-N
EA
C-N
IND
-N
IGN-N
EAC-H
120V HUM-H
CIRC-H
XFRM-H
LINE-H
Y/
Y2
W
R
GC
DHUM
Y
Y1
TRANS- FORMER 115V
24V
N
C
L
R
ON/OFF S
WIT
CH
GR
OUND
SCREW
WIRE NUTS SUPPLIED
BY
INS
TALLER
IGNIT
OR
1 2
1 2
GAS V
AL
VE
PRE
SSURE
SWIT
CH
HI-LIMIT
AUX. LIMIT
L1
NEUTRAL
1
2
3
4
5
N
L
C
G
EC
M
BL
O
WER
MO
TOR
GR
OUND
SCREW
1
2
3
4
5
6
1
2
3
4
5
6
G
W
Y
R
C
COMBUS
TION
FA
N
BLACK
BLACK
1 1
2 2
FLAME SENSOR
FURNA
CE ELE
CTRICAL BO
X
WHITE
*R
ef
er t
o blow
er t
able f
or f
act
ory hea
Ɵ
ng speed.
WHITE
WHITE
WHITE
WHITE
WHITE
BLA
CK
BLA
CK
BLACK
BLA
CK
BLACK
RED
GREEN
YELLO
W
GRA
Y
YELLOW
YELLOW
GREEN
ORANGE
ORANGE
BLUE
BLUE
BLUE
RED
GREEN
GREEN
GREEN
BLACK
YELLOW
WHITE
GRAY
YELLOW
RED
GRAY
BK/WH STRIPE
BK/WH STRIPE
WH/BK STRIPE
Summary of Contents for MG1 Series
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