→
Fig.
18—Unit
Wiring
Diagram
A97508
LEGEND
AL
S1
AU
XI
LIA
R
Y LI
M
IT
SWI
TCH
, OV
ER
TEM
P.
M
AN
U
AL
R
ES
ET,
S
PST
(N
.C
.)
AL
S2
AU
XI
LIA
R
Y LI
M
IT
SWI
TCH
, OV
ER
TEM
P.
A
U
TO
RES
ET,
S
PS
T (
N
.C
.)
BH
I /
LO
R
BL
O
WER
M
O
TOR
S
PEE
D CH
ANG
E RE
LAY
, SPD
T
BH
T / CLR
BL
O
WER
M
O
TOR
S
PEE
D CH
ANG
E RE
LAY
, SPD
T
BL
W
M
BL
OWER
M
O
TOR
, 4 or 5 -S
PEE
D,
P
ERM
AN
EN
T-
SPLI
T-
C
APAC
IT
OR
BL
W
R
BL
OWER
M
O
TOR
R
ELA
Y,
SP
ST
(N
.O
.)
CA
P
C
AP
AC
IT
OR
CP
U
M
IC
RO
PRO
C
ES
SO
R
AN
D
CI
RC
UI
TRY
D
SS
D
RA
FT
SA
FE
G
U
AR
D SW
IT
CH
(N
.C
.)
EA
C-
1
EL
ECT
RO
NI
C
AIR
C
LEA
NE
R
CO
NNE
CTI
O
N
(1
15
V
AC,
1
A
M
P M
AX.
)
EA
C-
2
EL
ECT
RO
NI
C AIR
C
LEA
NE
R CO
NNE
CTI
O
N (C
OM
MO
N)
FR
S1
FLA
M
E
R
O
LL
OU
T
SW
ITC
H
OV
ER
TEM
P.
M
ANU
AL RE
SET,
SPS
T
(N
.C
.)
FR
S2
FLA
M
E
R
O
LL
OU
T
SW
ITC
H
OV
ER
TEM
P.
M
ANU
AL RE
SET,
SPS
T
(N
.C
.)
FS
E
FL
AME
-P
RO
VI
NG
S
ENS
OR
E
LEC
TRO
D
E
FU
1
FU
SE,
3
AM
P,
AU
TOM
O
TIV
E BLAD
E TYP
E,
FA
CTO
R
Y
IN
ST
ALL
ED
FU
2
FU
SE,
FIE
LD IN
STA
LLED
G
V
G
AS VA
LVE,
RED
U
N
D
AN
T LOW-
HE
AT OP
ER
ATO
R
S,
2-S
TAG
E
H
PS
H
IGH
-H
EAT
P
R
ES
SU
R
E SW
IT
CH
, SP
ST
(N
.O
.)
HP
SR
HI
G
H
-H
EA
T
PRE
SSU
RE
S
W
IT
C
H
REL
AY,
S
PS
T (
N
.C
.)
HS
I
H
O
T-
SU
R
FA
CE I
G
N
ITE
R (1
15
V
AC
)
HS
IR
HO
T-
SU
RFA
C
E I
G
N
ITO
R RE
LA
Y,
SPS
T (N
.O
.)
HU
M
24V
AC
HU
M
ID
IFI
ER
C
O
N
N
EC
TI
ON
(0
.5
A
M
P.
M
AX.
)
ID
M
INDU
CE
D DRA
FT MO
TO
R,
2
-S
PEE
D,
S
H
AD
ED
-P
OL
E
ID
R
INDU
CE
R MO
TO
R REL
AY,
S
PS
T
(N
.O
.)
IH
I /
LO
R
INDU
CE
R
M
O
TO
R
SPE
ED
C
H
AN
GE
R
ELA
Y,
SP
DT
IL
K
BL
O
WER
D
O
O
R
IN
TER
LO
C
K SWI
TCH
, SP
ST (N
.O
.)
JB
JU
N
C
TI
ON
B
O
X
LE
D
LI
G
H
T-
EM
ITT
IN
G DI
OD
E FOR
S
TAT
US CO
DE
S
LG
PS
LO
W
G
AS-
PR
ES
SUR
E SWI
TCH
, SPS
T (N
.O
.)
LP
S
LO
W
-H
EAT
P
R
ES
SUR
E SWI
TCH
, SP
ST (N
.O
.)
LS
LI
M
IT
SWI
TCH
, OV
ERT
EM
PER
ATU
R
E-
AU
TO
R
ES
ET,
S
PST
(N
.C
.)
MG
VR
MA
IN
G
AS VA
LV
E RE
LA
Y,
D
PST
(N
.O
.)
-
1 =
VA
LVE
-
2 =
HU
M
ID
IFI
ER
PL1
12-
CI
RC
UI
T CO
NNE
CTO
R
PL
2
9-
C
IR
CU
IT
CO
NN
EC
TO
R
PL
3
3-C
IR
CU
IT
ID
M
C
O
N
NE
C
TO
R
PL
6
2-C
IR
CU
IT
HS
I CO
NN
EC
TO
R
SW
1
H
IG
H-
HEA
T-
O
NL
Y SW
IT
CH
, SPS
T
(M
ANU
AL)
*
SW
2
LO
W
-H
AT-
O
NL
Y SW
IT
CH
, SPS
T (
M
AN
UAL
)
*
SW
3 & 4
BLO
W
ER
-O
FF DE
LAY SET
TI
NG
SW
IT
CH
ES
,
SP
ST (
M
AN
UA
L)
*
TJ
TW
IN
NI
NG
JUM
PER
, SP
DT FO
R MA
STER
O
R
SLA
VE STA
TUS
(M
ANU
AL CH
ANG
E OV
ER)
TR
AN
TR
ANS
FO
R
M
ER-
115V
AC/
24VA
C
TW
IN
/T
ES
T
1-C
IR
CU
IT
T
W
IN
N
IN
G
B
US
S CO
NN
EC
TO
R
,
AL
SO
S
TAT
U
S
CO
DE
RE
CA
LL
JUN
C
TI
O
N
TE
RM
IN
AL
CO
NT
RO
L T
ERM
IN
AL
FA
CTO
R
Y PO
W
ER
W
IRI
NG
(115VA
C)
FA
CTO
R
Y C
O
NT
RO
L W
IRI
NG
(24V
AC)
FI
ELD
PO
WER
WI
RI
NG
(115VA
C
)
FI
EL
D CO
NT
R
O
L W
IR
IN
G
(2
4V
AC
)
CO
ND
UC
TO
R ON
C
O
NT
RO
L
FI
ELD
W
IRI
NG
SC
RE
W
TE
RM
IN
AL
FI
EL
D GR
OU
ND
EQ
UI
PM
EN
T G
R
O
U
ND
FI
ELD
SP
LI
CE
PLU
G
RE
CEP
TAC
LE
NOT
ES:
32
44
59-
101 RE
V.
A
1.
U
se o
nl
y co
ppe
r w
ire
bet
we
en
th
e d
isco
nn
ect sw
itch
an
d th
e u
ni
t.
2.
If
any
of t
he
or
ig
in
al
wi
re
, as su
pp
lie
d, m
ust
be
repl
ac
ed,
use
the
sam
e or
eq
ui
val
ent t
ype
wi
re
.
3.
In
duce
r (I
DM
) an
d b
low
er
(B
LW
M
) mo
tor
s co
nta
in i
nt
er
na
l aut
o-
re
set
th
er
ma
l ove
rlo
ad
swi
tch
es.
4.
Bl
ow
er
mo
tor
sp
eed
sel
ecti
ons
ar
e f
or
ave
ra
ge
con
di
tio
ns
. Se
e
In
stallatio
n In
str
uctio
ns fo
r de
tails on
op
timu
m
spe
ed
selectio
n.
5.
Re
pl
ac
e on
ly
wi
th
a
3-
AM
P f
us
e.
6.
Au
xi
lia
ry l
im
it sw
itche
s (A
LS1
&
2)
use
d o
n so
me
ho
rizo
nta
l an
d
som
e do
wn
flow
m
od
el
s.
7.
Th
is
w
ire
m
ust
be
con
nect
ed
to f
ur
na
ce sh
eet
me
tal
fo
r
con
tro
l to
pr
ove
fl
am
e.
8.
Fa
ct
or
y con
nect
ed
wh
en
LG
PS n
ot
used
.
RE
D
LS
FR
S2
RED
RED
FR
S1
(W
HEN
U
SED
)
ALS
1
DS
S
ORN
LG
PS
YEL
NO
TE
#8
LPS
NOTE
#8
(W
HEN U
SED)
RED
YEL
ORN
(W
HEN
U
SED
)
NO
TE
#6
ALS
2
ORN
SW
IT
CH
12
HE
AT
SE
T-
UP
SW
IT
CH
NO
RM
HI
H
T
LO
HT
*
ON
OFF
OFF
ON
BLO
W
ER
-
O
FF DELA
Y
(SEC
.)
SW
IT
CH
3
4
90 SEC 135 SEC
*
180 SEC 225 SEC
ON
OFF
OFF
ON
2-
ST
AG
E
FURNACE CONT
ROL
FACTO
RY
SETTI
NG
S
12
34
ON
OFF
3
2
1
BLU
BL
OW
ER
-O
FF
D
ELA
Y
BL
O
W
ER
-O
FF
D
EL
AY
LO
W
-HE
AT
O
N
LY
HIG
H
-H
EA
T O
N
LY
*
RE
D
RE
D
OR
N
W2
C
om 24V
W
/W
1
Y/
Y2
R
G
HUM
LE
D
S
M
TJ
TW
IN
TEST
12
11
10
GRN
GRY
BRN
P1
WHT
BLK
GRY
YE
L
3
2
1
9
8
7
WHT
FSE
BLK
GR
Y
BR
N
HP
S
BR
N
HI
P
BLU
GR
N
M
ID
M
HS
I
GR
N
IL
K
JB
L1
WH
T
PL6
RED
BLK
WHT
BLK
WHT
12
12
3
PL3
WH
T
BLK
RE
D
PL2
PR1
PR2
L1
L2
COM
M
ON
HI
-COOL
HI-GAS HEA
T
EA
C-
2
EA
C-
1
LO-
G
AS
HEA
T
SP
ARE
SE
C1
FU
1
SE
C2
NO
TE
#4
BLW
M
BR
N
BR
N
CA
P
WH
T
BLK
TR
AN
RED
BLU
WHT
BLK
GV
C
GR
N
FU
SE
D DI
SC
ON
NE
C
T
SW
IT
CH
(W
HEN
R
EQ
’D
)
NO
TE
#1
BLK
WH
T
GR
N
L2
GR
N
FU
2
CONNE
CT
ION DIAGRA
M
L1
BLW
R
TO 11
5V
AC
FI
EL
D DI
SC
ONNE
CT S
W
IT
CH
NOTE
#1
EQ
UI
PM
EN
T G
R
O
U
ND
LO
-G
AS-
HEAT
H
I-G
AS
-H
EA
T
SP
ARE
NO
TE
#4
CO
M
M
O
N
HS
IR
EA
C-
1
SCH
EM
ATIC DIA
G
RA
M
(NAT
U
RAL
GAS &
P
R
OPANE
)
EA
C-
2
3
1
HS
I
2
9
PL2
PR
2
115V
AC
PR
1
TR
AN
24VA
C
ID
R
L2
IL
K
ID
M
BLW
M
BH
I /
LO
R
BH
T /
CLR
CA
P
BR
N
BR
N
PL6
IH
I / L
O
R
SE
C1
FU
1
NO
TE
#5
1
2
3
HI
CO
M
HP
SR
1
5
6
2
N/
A
N/
A
HI
-C
O
O
L
PL3
4
7
SE
C2
8
LS
ALS
1
DS
S
ALS
2
FR
S1
(W
H
EN US
ED
)
FR
S2
N/
A
12
2
3
MG
VR
-2
9
6
NO
TE
#8
LPS
(W
HEN
U
SED
)
TW
IN
TE
ST
SLA
VE
M
AST
ER
W/
W1
R
HU
M
TW
IN
NI
NG
JUM
PE
R
TJ
W2
Y/
Y2
G
MG
VR
-1
NO
TE
#8
HP
S
5
4
1
10
7 8
N/
A
N/
A
FS
E
11
HI
M
P
C
NOT
E#7
PL1
COM
PONENT
TE
ST
To
in
iti
ate
the co
mpo
nent
test seq
uen
ce wi
th no
the
rmost
at i
npu
ts an
d wi
th al
l i
nd
ucer
Po
st-P
urg
e and
B
lo
w
er-O
ff Del
ay p
eri
od
s
comp
le
ted,
short
the
"TWIN/T
ES
T"
ter
m
inal
to
the
"
C
OM
" te
rmi
na
l for a
bout
two seco
nds. T
he
contro
l wi
ll
tur
n ON th
e i
ndu
cer m
otor
Low-S
pe
ed, i
nducer
mot
or Hi
gh
-S
peed
, HSI
, bl
ower
moto
r Lo
w-Gas-
He
at S
pee
d, bl
ow
er
mo
tor
Hi
gh
-Ga
s-Heat
Spe
ed,
and b
lower m
otor
High-Coo
l S
peed
for 7
-15
second
s each
. Neithe
r the
gas va
lve no
r the
hum
id
ifier will be
tur
ned ON.
CP
U
LG
PS
LO
SW
1
GV
ORN
SW4
SW3
SW2
C
OM
9.
Sym
bo
ls ar
e
an
el
ectr
ic
al
re
pr
es
en
tat
io
n o
nl
y.
10
.
BL
O
W
ER
-O
N
DE
LAY
: Ga
s he
ati
ng
4
5 se
cond
s,
Co
ol
in
g/
He
at
Pu
mp
2 s
ec
on
ds
.
11
.
C
oo
lin
g/H
ea
t P
um
p B
LOW
ER
-O
FF
D
ELA
Y i
s 9
0
seco
nd
s.
12
.
IGN
IT
IO
N
-L
O
C
KOU
T w
ill o
ccur
a
fter
fo
ur
co
nsecu
tive
un
su
cce
ssfu
l tria
ls-fo
r-ig
ni
tio
n. Co
nt
ro
l will a
uto
ma
tica
lly
re
se
t af
ter
th
re
e h
ou
rs.
13
.
C
on
trol
m
ust b
e g
roun
de
d a
t pi
n 10
of
12-
pi
n con
ne
ctor
.
14
.
N
A -
N
ot
Ap
pl
ic
abl
e
15
.
Sp
ar
e t
er
m
in
al
an
d w
ire
n
ot
avai
la
bl
e o
n so
me
ap
pl
ic
ati
ons. I
nsul
ate co
nn
ecto
r i
f no
t ava
ila
bl
e.
RE
D
LO
RE
D
ME
D
L
O
BLU
CO
M
W
HT BLK
HI
YE
L
M
ED HI
ME
D
CO
M
HI
ME
D
ME
D
L
O
LO
NO
TE
#15
OR
N
SP
ARE
M
ED HI
SP
ARE
BLU
NO
TE
#15
13
