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79
Wiring Diagram (continued)
1,500,000 - 1,300,000 - 2,000,000 Btu/hr Models
50
Hz L
i
mit
Res
i
s
to
r
1.2
K
Oh
m
Y
TO
V
F
D
TE
R
M
I
NAL
NU
M
B
E
R
15
T
O
V
FD
TE
R
M
I
NAL
NUMB
E
R
14
O
P
TIO
NAL
50
H
z
LIM
I
T
R
ESI
S
TO
R
P
O
P
T
I
O
NAL
WARNING:
To avoid possible
shock hazard, disconnect power
before servicing.
O
PTI
O
NA
L
BK
BR
J
3
5
1
4
1
3
1
214321
G
ND
O
H
M
O
U
T
O
H
M
O
H
M
O
H
M
V/
m
a
V/
m
a
1
2
3
1
2
1
2
1
2
1
2
3
4
5
BYPASS
SE
N
S
OR
OUT
LET
SE
NSOR
I
NL
E
T
SE
NS
OR
E
NAB
L
E
SWI
T
CH
OA
SE
NS
OR
2
1
CHA
SSIS
GRO
UND
RUN/STOP SWITCH
2
1
2
1
2
1
2
1
65
789
1
0
11
O
A SEN
SOR
INLET SENSO
R
BYPASS
SE
NSOR
F2
F1
-
+
IGNITION
MODULE
24VAC GAS
VALVE
L
ouver
Pr
o
ving
S
w
AIR
S
WITCH
Lo
w
G
as
High
G
as
FLO
W
S
W
I
TC
H
Blocked
Dr
ain
FC-FC+
S1
L1
L2
S2/ FS
L
I
N
E
N
E
U
T
R
A
L
11
10
9
6
4
3
2
1
N/A
TH
PI
LV1
PS
F
F
M
/
S
F
F
HOT
SURFACE
IGNITER
LBL90002 REV A
GY
BK
W
120VAC GA
S
V
AL
VE
Y
R
R
GAS VA
LVE RELAY
NO
CO
M
NO
COM
NO
NO
N
C
C
NC
NO
C
NO
NC
C
NO
N
C
C
N
O
N
C
C
EXT.
G
AS VALVE
Y
R
LV2
RESET
8
7
5
M
V
5
4
2
1
O
O/
BK
O
O
O
PU
PU
PU
R
R
R
O
BL
GY
M
T
BR
T
W
BK
W
BK
COMM
UNICATIO
N
CABLE #1
R
EAR
C
O
MMUNICATION
CABL
E
C
O
NNECTIO
N
CONTR
OL PANEL
C
O
MMUNICATION
CABLE
C
O
NNEC
TION
C
O
MM
UN
ICATION
C
ABLE #3
BYP
AS
S
VALVE
R
W
BK
GY
GY
GY
GY
NO
COM
LOUVER
RELAY
LOUVER
RELAY
CONTACTS
BLO
WER
ASSEM
BLY
R
O
T
A
T
I
O
N
R
O
T
A
T
I
O
N
STATUS
LED
BK
BK
Y
Y
Y
BK
Y
BR
BL
Y
BL/BK
BL
IGNITION
R
E
SET
BL
AT OPEN
BK
BK
R
OPT
I
ONA
L
VENT VALVE
OPTIO
N
A
L
OP
TIONAL
STD.
3
2
1
4
EXT. GAS
VALVE
U
VERS
LOUVE
R
CO
N
TACTS
CO
MMON
CLO
SE
D INPUT
OPEN INPUT
BK
W
120
VAC
O
UT
INLET
SENSOR
2
1
1
2
3
1
2
3
(2
)
Where poss
i
ble, swit
c
hes and circuitry are sh
ow
n in power
off s
tate
.
NOTES:
(3) When replacing wi
ring,
use
wire
of equal or h
ighe
r tem
pera
ture
and
ga
g
e.
(4
) Schematic shows
e
lec
trica
l connect
i
ons only.
Please
refer
to wiring diagram in
o
w
ner's manua
l fo
r r
o
uting an
d
pin-outs for all connector
blocks
.
(1
)
W
ARNING:
To
a
vo
id possible shock hazard
, di
sc
onnect po
w
er be
for
e se
r
v
icing.
BR
I
NPUT
S
1
1
1
1
1
BK
W
Y
BR
BL
R
NOTE:
DO NOT DI
S
CONN
EC
T
CABLE FROM
B
LO
W
ER.
G
OUTLE
T S
EN
SOR
COMMUNICATION
CABLE #1
1
PU
PU
PU
PU
Y
PU
PU
C
OMMUNICATION
CAB
LE
#2
PU
W
W/
B
K
(5) Pum
p
de
lay
is
standard on water
heaters
.
Y
OR
T
OGG
LE
S
WI
TCH
M
ANUAL
O
VERRI
D
E
C
1
2
Y
4
3
2
BK
W
R
R
B
K
W
BLOCKED
DRAIN
PU
COM
MO
N
T
B
R
BLOCKED
O
PEN
1
2
3
J3
1
2
3
P
U
24 VAC
O
NC
C
O/
BK
PU
BL
Y