Navien NHB-055, Service Manual

Page: 63 / 147

NHB Service Manual 63 Version 1.0
4.8 Electrical Diagnostic Point & Wiring Diagram
Color C
ode
B O R W Y BK BR GY
: Blue : Or
ange
: R
ed
: W
hit
e
: Y
ello
w
: Black : Br
own
: Gr
een/Y
ello
w
If an
y of the or
ig
inal wir
es as
supplied the boiler must be replac
ed
, they must be r
eplac
ed
their equiv
alen
t.
FM
Fan M
ot
or
Y
BK
R
O
W
CN8
CN17
IG
Spar
k
Elec
tr
ode
Flame r
od
BR
B
BK
BK
Neutr
al(
W
)
Hot(BK
)
Gr
ound (
GY
)
GY
Po
w
er C
ode
W
Fuse (10A
)
GY
Gr
ound
CON1
BK
BK
Fr
on
t P
anel
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
CN13
B B
Exhaust
1 T
her
mist
or
B B
B B
Retur
n T
her
mist
or
B B
B B
Supply T
her
mist
or
B B
BK BK
H
igh Limit S/W
CN1
CN26
CN19
GY
M
CN15
D
ual V
en
tur
i
BR
W
B
MGV
M
ain
G
as V
alv
e
W
Y
R
CN16
CN10
CN12
CN24
CN25
P
: P
ur
ple
LW
CO
CN11
B
O
ut
door T
her
mosta
t
B
CN22
W
at
er P
ressur
e
R GY BK
Sensor
WPS
CN6
APS
R
W BK
A
ir P
ressur
e S
ensor
A B
D
E
F
G
H
I
J
K
CN18
CN28
AC24V O
utput
Sys
te
m
Supply Temp
.
Sys
te
m
Retur
n
Temp
.
Sys
te
m
Pump
Boiler Pump
DHW Pump
CN29
CN30
CN27 CN23
T/T CH
T/T
DHW
DHW
A/H
(max 2A
)
(max 2A
)
(max 2A
)