2.22 WIRING DIAGRAM
W
at
er
Pr
es
su
re
Sw
itc
h
Tu
rb
in
e
Re
tu
rn
Th
er
m
ist
or
Fl
ow
Th
m
r
DH
W
Th
m
r
W
ea
th
er
Co
m
pe
ns
a
�
on
Op
en
Th
er
m
Pr
im
ar
y P
CB
Ap
er
tu
re
Co
nn
ec
to
r
Ch
as
sis
Co
nn
ec
to
r
M
ai
ns
In
N
Ro
om
S
ta
t
/T
im
er
L
Op
�
on
al
Fr
os
t S
ta
t
El
ec
tr
od
e
Sp
ar
k
Ge
ne
ra
to
r
1 2 3
Fa
n
2 3 4
Pu
m
p
1 2 3
3 2 1
2
Ga
s
Va
lv
e
1
Di
ve
rt
er
Va
lv
e
2
3
4
5
1
3
2
1
X7
X1
X2
X3
X4
X5
X6
X8
X9
X1
0
g/
y
br
b
r
bk
r
w
br
g/
y
bk
b
g/
y
g/
y
bk
b
r
r
b
Ch
as
sis
Ea
rt
h
bk
b
b
y
bk
p
r
p
y
bk
p
y
bk
b
bk
r
or
bk
bk
r
bk
p
bk
b
gy
bk
v
bk
y
b
r
bk
v
bk
1
2
3
5
4
DH
W
Fl
ow
Turbine
v
Flame Sensor
o
gy
v
w
v
o w
gy
Key
bk: Black
gy:
Grey
r:
Red
g:
green
b:
blue
br:
brown
g/y:
green
/yellow
o:
orang
e
p:
pink
v:
violet
y:
yellow
w:
white
29
Installation and Servicing
Section 2 - Installation
INST
ALLA
TION