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WIRING DIAGRAM
180 ° F (83)
140 ° F (60)
130
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EVLAV SAG
TIN
U
AC120V
AC100V
PRIMARY
SECONDARY
NEUTRAL
10A(FUSE)
RELAY 7
RELAY 8
CIRCULATION PUMP
ANTI-FROST HEATER
VARISTOR
ARRESTER
VARISTOR
EARTH
DC90V
DC140V
DC12V
POWER
CONTROLLER
FAN
COMBUTION FAN
DC90V
HIGH LIMIT
SWITCH
DC140V
SOLENOID
VALVE Q3
SOLENOID
VALVE Q2
SOLENOID
VALVE Q1
SOLENOID
VALVE 0
IGNITER
RELAY 9
RELAY 3
RELAY 1
RELAY 4
RELAY 5
IG
SV0
SV1
SV2
SV3
RELAY 10
PRIMARY
SECONDARY
DC15V
15V POWER CIRCUIT
GND
ROSNES WOLF
REGNAHCXE TAEH
EVLA
V LORTNOC WOLF
EVLAV LORTNOC WO
LF SSAPYB
ESUF LA
MREHT
C
CPU
CENTRAL
PROCESSING
UNIT
RELAY
DRIVING
CIRCUIT
RELAY 1
RELAY 3
RELAY 5
RELAY 7
RELAY 10
DU
FR FLAME ROD
EARTH
D
FLAME DETECTING CIRCUIT
GAS PROPORTION VALVE
POWER CONTROL CIRCUIT
A
A
B
C
D
B
FAN
PULSE
CONTROL
CIRCUIT
FAN ROTATION
SPEED INPUT
FAN CURRENT
VALUE INPUT
FAN CONTROL
OUTPUT
Sub-CPU
SUB
CONTROL
UNIT
WATER OUTLET
THERMISTOR
WATER INLET
THERMISTOR
HEAT EXCHANGER
THERMISTOR
AIR INLET
THERMISTOR
5V POWER CIRCUIT
GND
NR98 (-SV,-OD,-DVC) / NC199 (-OD,-DVC) / N-0751M (-OD,-DV,-DVC)
HEAT
EXCHANGER
THERMISTOR
BYPASS FLOW
CONTROL VALVE
REMOTE CONTROLLER
WATER INLET
THERMISTOR
WATER OUTLET
THERMISTOR
AIR INLET
THERMISTOR
TEMPERATURE
ADJUSTMENT
SWITCH
ELECTRODE
FLOW CONTROL
VALVE
THERMAL FUSE
FLAME ROD
FAN MOTOR
<NR98-DVC/NC199-DVC/N-0751M-DVC Model Only>
V : Violet
O : Orange
BL : Blue
BK : Black
COLOR CODING
W : White
R : Red
GY : Gray
G : Green
BR : Brown
Y : Yellow
RC-7649M
RC-7650M
VACANT CONNECTOR
RC TERMINAL
VENT LENGTH ADJUSTMENT
CONNECTOR
FOR FACTORY
USE ONLY
HEAT EXCHANGER
FLOW SENSOR
FAN SPEED CORRECTOR
CIRCULATION
PUMP
(OPTIONAL)
<NR98-DV/NC199-DVC/
N-0751M(-DV,-DVC) Model Only>
ANTI-FROST HEATER
CURRENT
LEAKAGE
SAFETY
DEVICE
(GFCI)
TRANSFORMER
Manifold Gas Pressure
Increase Button
Manifold Gas Pressure
Decrease Button
Minimum Manifold
Pressure Set Button
Maximum Manifold
Pressure Set Button
(For Quick Connect Multi System Only)
Quick Connect Cord (Optional)
MAIN CIRCUIT
BOARD
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