andrews WHX42 Installation Manual, Operation And Maintenance Manual page 19

Wiring Diagram (WHX42, WHX56, LWHX42, LWHX56)
AIRFLOW CHANGE
2 2
O
-OVER CONNECTOR O 1 1 O
1
(VACANT CONNECTOR)
2
3
4
5
6
R
7 R
INLET WATER
3
W W
2
THERMISTOR
1
W W
HEAT EXCHANGER W
4
W W
THERMISTOR
3
2
1
W W
OUTLET WATER
W
2
W W
THERMISTOR
W 1 W
OPERATING LED
2
BK BK
W 1 W
BK 8 BK
7
V V
MAIN WATER
SM (VCC) 6
W W
G 5 G
FLOW CONTROL
4
O O
VALVE (VCC) R 3 R
(Fully open) 2
Y Y
LS
(GND) 1
BL BL
BK 8 BK
7
V V
SM (VCC) W 6 W
BYPASS WATER
5
G G
FLOW CONTROL 4 O
O
(VCC) R 3 R
VALVE
(Fully open) 2
Y Y
LS
(GND) BL 1 BL
BL
1 R
BL
THERMAL FUSE
BL 1 BL
REMOTE CONTROLLER
BL 2 BL
BL BL
1
RC TERMINAL
1 R
SYSTEM CONTROLLER
B5
2 BK
(OPTIONAL)
FLAME ROD
W (Vs)
W 6 W
5
BL(GND)
BL 4 BL
FAN MOTOR FM
R (Vcc)
R 3 R
Y (FG) Y 2 Y
O (Vsp) O 1 O
IGNITER
W
ELECTRODE IG
BK
HIGH-LIMIT SWITCH
W BK
2
W 1 W
1 BR
(VACANT CONNECTOR)
2
BR
BR
1 1 GY
(UN-USED)
2 2 BR
CURRENT LEAKAGE
SAFETY DEVICE
(GFCI)
<AC230V>
BR
BR 1 BR
BL
BL 2
W
BL
Y/G Y/G Y/G BL
EARTH EARTH EARTH
FREEZE PROTECTION BL
THERMOSTAT
W
BL
FREEZE PROTECTION
THERMOSTAT
BL
BR
BR
W 1
R
(UN-USED)
2
3
BL
2
(VACANT CONNECTOR) R
1 BL
<CN102>
<CN89>
1 2 3 4
3 BL
2
1 BL
<CN38>
2 1
4 3
6 5
8 7
9
10
12 11
14 13
16 15
18 17
20 19
22 21
24 23 R
26 25 R
28 27
30 29
BL
32 31
1
<CN78> 1 3 5 <CN1>
2 4 6
<CN160>
BL R
<CN102>
3 2 1
4 3 2 1
BK R
G G
EARTH
TRANSFORMER
(VACANT CONNECTOR)
BR BR
1 3
GY
2 GY BL 2 BL
BL
BL
3 W 1 W
BL/W W W W W W W W W W
1 2 2 1 2 1 2 1 2 1
W W W W W W W W W W
FREEZE PREVENTION HEATER
BL
15
<CN63>
14
5 6 1 2 3 4 5 6 7 8 9 13
12
11
MAIN CIRCUIT
10
BOARD
9
8
7
6
5
4
Manifold Gas Pressure
3
2 Increase Button
1 R
Manifold Gas Pressure
<CN75>
Decrease Button
Minimum Manifold Pressure Set Button
Maximum Manifold Pressure Set Button
(For Quick Connect Multi System Only)
BL BL 6 BL
6 6
BL BL 5 BL
5 5
4
G G G(BK)
4 4
W W 3 W(R)
3 3
BK BK 2 BK(G)
2 2
1
R R R(W)
1 1
<CN184>
BL 8 BL
R 7 R
O 6 O
BL 5 BL
4
BR BR
GY 3 GY
1 2 3 4
<CN10> W 2 W
5 6 7 8 BK 1 BK
O Y W
<CN27>
5 4 3 2 1 9 7 6 5 4 3 2 1
7
<CN
<CN104>
6
5
89A>
4
3
2
1
BK
W
2 1
<CN101>
LIVE
<CN92>
1
POWER CIRCUIT
2
BOARD
3
DC90V
DC140V
W 6 W
5
BL 4 BL
R 3 R
Y 2 Y
O 1 O
DC15V(1)
BK BK W
15V POWER CIRCUIT
2 1
MAIN WATER FLOW SENSOR
BYPASS WATER FLOW SENSOR
GND
MAIN WATER FLOW CONTROL VALVE
BYPASS WATER FLOW CONTROL VALVE
THERMAL FUSE
COLOR CODING
W : White
R : Red
BK : Black
V : Violet
GAS PROPORTION VALVE
POWER CONTROL CIRCUIT
O : Orange
BL : Blue FLAME DETECTING CIRCUIT
GY : Gray
FR
G : Green
BR : Brown
Y : Yellow
1
R R
2
BURNER THERMISTOR
W 3 W
Y 3 Y (Pulse)
MAIN WATER
2
R R (VCC)
QS
1 (GND)
BL BL FLOW SENSOR
R
3 (Pulse)
Y Y
BYPASS WATER FLOW
R 2 R (VCC)
QS
1 (GND)
BL BL SENSOR
BL
Other Unit in Quick Connect Multi System
MAIN CIRCUIT
BOARD
BL BL
6 6
BL BL
5 5
G G
4 4
184
3 W W 3
BK BK
2 2
R R
1 1
<CN184>
Quick Connect Cord(Optional)
BL 6
BL 5
4
(G)BK
(W)R 3
(BK)G 2
1
(R)W
BL
DU
GAS VALVE UNIT
R
W
SV
10
0
W
BK
SV
11
Q1 GAS MANIFOLD
BK
GY
SV
12
Q2
GY
O
SV
13
Q3
O
BR
SV
14
Q4
BR
NEUTRAL
VARISTOR
VARISTOR ARRESTER
CURRENT LEAKAGE SAFETY DEVICE
FREEZE PROTECTION FREEZE PREVENTION
THERMOSTAT HEATER
EARTH
AC230V
PRIMARY
SECONDARY
10A(FUSE)
AC100V
RELAY 9 IGNITER
IG
RELAY 3 SOLENOID VALVE 0
SV0
HIGH LIMIT
RELAY 1 SOLENOID VALVE Q1
SV1
SWITCH
RELAY 10
RELAY 4 SOLENOID VALVE Q2
SV2 DC90V
RELAY 5 SOLENOID VALVE Q3
SV3
RELAY 2 SOLENOID VALVE Q4
SV4 DC140V
POWER
FAN FAN MOTOR
CONTROLLER
A
B
DC15V(2)
PRIMARY
FAN CONTROL
FAN
OUTPUT
PULSE
SECONDARY A
CONTROL
CIRCUIT
FAN ROTATION
SPEED INPUT
B
Sub-CPU
SUB
CONTROL
UNIT
CPU C D
CENTRAL
PROCESSING
OUTLET WATER THERMISTOR
RELAY 1
UNIT
INLET WATER THERMISTOR
RELAY 2
HEAT EXCHANGER
THERMISTOR
RELAY
FREEZE PROTECTION
RELAY 5
DRIVING
THERMISTOR
CIRCUIT
RELAY 7
BURNER THERMISTOR
RELAY 9
RELAY 10
DU D
EARTH
FLAME ROD C
5V POWER CIRCUIT
GND
15