T-H2-DV/T-H2-OS Service Manual
Ver. 1.01
12
CONFIDENTIAL
6. Wiring diagram
The diagram below refers to both the T-H2-DV and T-H2-OS.
BK: BLACK
R: RED
W: WHITE
G: GREEN
BL: BLUE
O: ORANGE
Y: YELLOW
P: PURPLE
BR:BROWN
LB:LIGHT BLUE
A
A1
A2
B2
B1
C
C2
C1
D2
D1
E1
E3
E2
K1
F
G1
G2
H1
H2
I
J
K2
TM-RE30
Inlet
thermistor
Mixing
thermistor
Output
thermistor
BK
BK
B K
Air-fuel
ratio rod
Ground
Flame rod
MV
SV3
SV1
SV2
B K
B K
B K
O.H.C.F
B L
B L
B L
B L
Y
G
O
B L
LB
O
R
G
Parent
W
W
B K
B K
B L
B L
R
R
1
2
3
4
5
6
O
F
F
7
8
1
2
3
4
5
6
O
F
F
7
8
2
1
W
Y
O
R
Gas
Propor-
tional
Valve
W
R
W
R
B K
R
W
Flow
Sensor
B K
W
R
Hi-limit switch
for exhaust
Exhaust
thermistor
W
W
W
R
YG
W
BK
BR
R
O
Y
G
W
BK
BL
Water
Control
valve
Igniter
rod
I G
P
P
P
P
BK
BK
G
B K
W
Trans-
former
Ground
BR
B R
G
Ground
B K
W
W
B K
B L
B R
Surge
box
W
BK
BL
W
Y
O
R
BL
W
9
1
0
9
1
0
B L
BL
H i - l i m i t
s w i t c h
O.H.C.F
B L
B L
Fan motor for
exhaust
Fan
motor
Heaters
Freeze protection
thermostat
M A X b u t t o n
M I N b u t t o n
I n c r e a s e b u t t o n
E r r o r c a l l b u t t o n
D e c r e a s e b u t t o n
A l a r m
p o r t
P u m p p o r t
B u r n i n g l a m p
7 S e g L E D
N u m b e r d i s p l a y b u t t o n
L e f t b a n k
o f d i p s w i t c h e s
R i g h t b a n k
o f d i p s w i t c h e s
T - H 2- D V
O n ly
T - H 2- D V
o n ly
120
VAC
R e m ot e
c o n tr ol l e r
