28
RT
S
MOT
MOT
-t°
-t°
-t°
-t°
A1
VCC
120 ON
K3
K2
K1
GND
VCC
GND FA
N
V1
A2
H2
V2
A3
V3
IGN_VCC
IO_GND
IO
GND
HALL
PWM
VCC
H1
P
owe
r
Gas V
alv
es
12 V
olt DC
Wi
re
Bridge
AECO
WECO
Gas
ON / OFF
Saf
ety
Gas V
alv
es
Digital
Contr
o
l
Unit / P
a
nel
120V
AC_E_PCB
Fr
ost Contr
o
l
Heating Unit
(Option)
Contr
ol_PCB
Flame
detection
Igniter
CA
T
S
Cir
culation Air
FA
N
WTSS
WTS
A
TSS
AT
S
Combustion
Air F
A
N
Blue
Blue
Blue
Blue
_
_
Blue
Gra
y
Gra
y
Gra
y
White
White
Black
Red
Red
Red
Tr
ansparent
Yello
w
Yello
w
Green
If
an
y o
f t
h
e o
ri
g
in
al
w
ir
e
as
s
u
p
p
lie
d
w
it
h
t
h
e f
u
rn
ac
e m
u
st
b
e
r
e
p
lac
ed
,
it
m
u
st
b
e
r
e
p
la
c
e
d
, w
it
h
w
ir
e
A
W
G
#
18 (
**
A
W
G
#
12)
- 105 °
C
- U
L
1015,
o
r it
s e
q
u
iv
a
le
n
t.
**
**
Diagnostic
Tool
Connection diagram 12 volt (Control_PCB)
Fig. 40