Wiring diagram

Y
POWER
CIRCUIT
BOARD
<CN102>
G
<CN78>
<CN186>
MAIN
CIRCUIT
BOARD
R
BL
BL
W
BK
G
BL
O
R
G
BL
<CN101>
<CN42>
R
O
V
W
BL
G
Y
BK
Y
R
<CN38>
<CN197>
BK
BL
BL
W
<CN103>
BK
BK
W
<CN92>
O
<CN104>
W
Y
R
<CN27>
BL
BR
Y
HEAT EXCHANGER
FLOW SENSOR
BL BL
R
Y
R
Y
(GND)
(Vcc)
(Pulse)
GY
W
R
BL
BL
Minimum Manifold
Pressure Set Button
Maximum Manifold
Pressure Set Button
BL
W
G
R
BK
BL
Quick Connect Cord 2(Optional)
󲨃󲨍
󲨘󲧩󲨓󲧪
󲨃󲨌󲧩󲨈󲧪
󲨓󲧩󲨘󲧪
󲨈󲧩󲨃󲨌󲧪
󲨃󲨍
󲆀󲨃󲨌󲆁󲨈
󲆀󲨓󲆁󲨘
󲨃󲨍
󲆀󲨘󲆁󲨓
󲆀󲨈󲆁󲨃󲨌
󲨃󲨍
Other Unit in Quick Connect
Multi System
(For Quick Connect Multi System Only)
Decrease Button
Increase Button
Manifold Gas Pressure
Manifold Gas Pressure
BL BL
<CN186>
BL
G
R
BK
W
BL
G
R
BK
W
MAIN CIRCUIT
BOARD
FLAME ROD
BL
R R
R(Vcc)
FAN MOTOR
BL(GND)
BR(Vdc)
Y(FG)
BR
BL
Y
BR
BL
Y
G
GROUND
LIGHTNING
PROTECTION
CIRCULATION PUMP
(OPTIONAL)
FREEZE PREVENTION HEATER
W
W
W
HEAT
EXCHANGER
FLOW CONTROL
VALVE
RR
(VCC)
(Fully open)
(GND)
BL
Y
BL
Y
(VDC)
BK
V
G
O
W
BK
V
G
O
W
BL
BL
BL
BK
W
HIGH-LIMIT
SWITCH
W
W
W
W
THERMAL FUSE
R
BK
RorBL
BKorBL
BL
󲨓
BK
BK
W
W
BL
R
BK(W)
W(BK)
BK
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
GROUND
G
GROUND
<DIP SWITCH>
FLAME DETECTING CIRCUIT
GAS PROPORTION VALVE
POWER CONTROL CIRCUIT
WATER FLOW SENSOR
15V POWER CIRCUIT
HEAT EXCHANGER FLOW CONTROL VALVE
DC15V
GND
DC140V
HOT
HEAT EXCHANGER
THERMISTOR
5V POWER CIRCUIT
AIR INLET
THERMISTOR
FLAME RODFR
DU
EARTH
RELAY 2
D
GND
WATER OUTLET
THERMISTOR
WATER INLET
THERMISTOR
FAN
PULSE
CONTROL
CIRCUIT
RELAY
DRIVING
CIRCUIT
RELAY 1
CPU
CENTRAL
PROCESSING
UNIT
D
FAN CURRENT
VALUE INPUT
POWER
CONTROLLER
DC12V
C
SECONDARY
PRIMARY
COMBUTION FAN
FAN
FAN CONTROL
OUTPUT
FAN ROTATION
SPEED INPUT
DC140V
C
Sub-CPU
SUB
CONTROL
UNIT
A
B
EARTH
ARRESTER
NEUTRAL
VARISTOR
RELAY 2
RELAY 1
FREEZE PREVENTION
HEATER
CIRCULATION PUMP
10A(FUSE)
VARISTOR
SOLENOID
VALVE 0
SV0
SV3
SV2
SV1
SOLENOID
VALVE Q2
SOLENOID
VALVE Q3
SOLENOID
VALVE Q1
HIGH LIMIT
SWITCH
IG
IGNITER
E
E
IG DRIVING CIRCUIT
GAS SOLENOID VALVE
DRIVING CIRCUIT
THERMAL FUSE
W
W
WATER LEVEL
ELECTRODE
W
(GND)R
W
RorV
W
RorG
BL
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
EXHAUST
THERMISTOR
<CN89>
REMOTE CONTROLLER
BL
BL
W
W
W
W
BK(W)
W(BK)
<AC120V>
BR : Brown Y : Yellow
R : Red
O : Orange
BK : Black
GY : Gray G : Green
BL : Blue
V : Violet
W : White
COLOR CODING
WIRING DIAGRAM
B
A
BYPASS FLOW CONTROL VALVE
SV4
SOLENOID
VALVE Q4
BYPASS
FLOW CONTROL
VALVE
R
R
(VCC)
(Fully open)
(GND)
BL
Y
BL
Y
(VDC)
BK
V
G
O
W
BK
V
G
O
W
Y
GO
V
BK
O
BL
BLorG
R
W
W
BK
GROUND
W
W
R
HEAT EXCHANGER
THERMISTOR
WATER OUTLET
THERMISTOR
AIR INLET
THERMISTOR
WATER INLET
THERMISTOR
EXHAUST
THERMISTOR
WATER LEVEL ELECTRODE
DETECTION CIRCUIT
BR
<E(N,P)19 Model Only>
<E(N,P)19 Model Only>
<E(N,P)19 Model Only>
RorBL
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
<E(N,P)18 Model Only>