Navien NCB500-2S/37K, Service Manual

Page: 39 / 118

38 System Details
4.5 Wiring Diagram
2 1
CN1
CN6
OT
R/C
M
LIN
E
N
EU
TR
A
L
P.E
WPS
Flame
Detector
Ignitor
GAS
Valve
BURNER
3WAY-Valve
PUMP
OU
TL
ET
2_
Te
m
p
Outdoor Sensor
8 6 4 2
7 5 3 1
CN5
BLDC FAN
EX
H
A
U
ST
_T
em
p
Low water
pressure S/W
R
ET
U
R
N
_T
em
p
SU
PP
LY
_T
em
p
Dip s/w
(8pin)
Dip s/w
(4pin)
BURNER HTL
M
7
6
5
4
3
2
1
8
MIX V/V
CN10
OU
TL
ET
_T
em
p
5
4
3
6
2
CN12
HTL
IN
LE
T_
Te
m
p
2 3 4
CN8
1
CN2
M
7
6
5
4
3
2
1
8
WAV V/V
CN11
P.E
1
2 3 4 1 6 7 8 5
1
0 1
1 1
2
9
1
4 1
3
Flow
Sensor
1
DHW_INPUT
2 3 4
CN15
1 5
WAV,MIX V/V
applies to
NCB500 Combi
5
6
7
8
9
10
11
4
CN9
1
2
3
PA
N
N
EL
7
6
5
4
3
2
1
8
PIN1
P
C
5 4 4
CN14
6 2 1 3 7
2
1
CN13
C
H
_I
N
P
U
T_
LI
V
E
5
6
7
4
1
2
3
CN4
5
6
4
1
2
3
CN4
CN7
2 3 4 1 6 7 8 5
1
0 1
1 1
2
9