52
NR111 (-SV,-OD,-DV) / NC250 (-SV,-DV) / N-0931M (-OD,-DV)
BK
W
W
WW
W
W
W
W
W
W
WW
W
W
W
W
W
W
W
W
W
ANTI-FROST HEATER
W
W
W
W
(OPTIONAL)
PUMP
CIRCULATION
(OPTIONAL)
are being used
SC-101-6M-B system controllers
Only necessary if SC-101-3M-B or
CCP VALVE
RR
BL
BL
G
BK
W
BK
BL
G
W
BL
BL
(BK)G
(W)R
(R)W
(G)BK
BL
BR
BK
BR
GY
GY
BK
UNIT
GAS VALVE
Y
(Pulse)
BL
R
(Vcc)
(GND)
W
W
BL
Y
R
W
V
V
Y
R
BL
R
Y
Increase Button
Set Button
Minimum Manifold Pressure
Decrease Button
Manifold Gas Pressure
Manifold Gas Pressure
Y
<CN63>
WWWBK
W
Y
<CN102>
WRO
BL
W
BL
BL
W (R)
BK (G)
R (W)
G (BK)
BL
V
R
BL
BK
W
G
BL
W
W
BK
W
GY
W
BK
GY
BL
R
O
R
BL
O
BRBR
BL BL
R
<CN70>
W
BOARD
CIRCUIT
MAIN
GY
O
BK
BK W
BL
BR
W
WWG
WBK
<CN1>
<CN10>
W
BK
R
<CN184>
BL
BL
G
<CN75>
Set Button
Maximum Manifold Pressure
FLOW SENSOR
HEAT EXCHANGER
Quick Connect Cord(Optional)
Other Unit in Quick Connect Multi System
BOARD
MAIN CIRCUIT
FAN SPEED CORRECTOR
<N-0931M, N-0931M-DV Model Only>
(For Quick Connect Multi System Only)
<CN184>
FROST SENSING SWITCH
BL
BL
R
2
2
1
2
3
1
2
3
1
2
1
2
1
2
1
2
1
2
1
2
1
4
3
6
5
8
7
2
1
1
1
4
3
2
1
2
1
2
1
2
1
2
1
2
1
2
1
1
2
3
4
4
321
4
1
1324
5768
2
3
4
5
6
321 4321 45321
32
2
1
1
1
3
6
5
8
7
11
4
3
1
2
1
Y
<CN38>
R
BL
BL
BL
<CN89>
BK
W
W
W
W
W
W
W
W
W
W
Y
BK
W
W
BK
BK
R
SWITCH
ADJUSTMENT
TEMPERATURE
THERMISTOR
AIR INLET
THERMISTOR
WATER OUTLET
THERMISTOR
WATER INLET
WIRING DIAGRAM
180 F (83 C)
140 F (60 C)
130 F (55 C)
O
BK
BK
Y
Y
G
BL
G
V
R
R
O
BL
BK
V
WW
BK
W
BK
BKBK
VV
<CN78>
BL
BL
G
BL
Y
O
R
W
G
R
O
Y
BL
BK
BLBL
G
O
Y
R
W
BK
V
G
O
Y
R
BL
V
WW
BL
BK
CONTROLLER
FOR SYSTEM
DISCONNECT
BURNING LED
(GND)
(VCC)
(GND)
(VCC)
(VCC)
VALVE
CONTROL
FLOW
BYPASS
VALVE
CONTROL
FLOW
EXCHANGER
HEAT
(VCC)
BK
W
(Fully open)
(Fully open)
THERMISTOR
EXCHANGER
HEAT
WW
W
BK
ANTI-FROST HEATER
SECONDARY
PRIMARY
10A(FUSE)
NEUTRAL
O
O
ARRESTER
DC90V
DC140V
EARTH
SWITCH
HIGH LIMIT
VARISTOR
C
B
A
B
OUTPUT
FAN CONTROL
SPEED INPUT
FAN ROTATION
VALUE INPUT
FAN CURRENT
A
CIRCUIT
CONTROL
PULSE
FAN
THERMISTOR
WATER INLET
D
THERMISTOR
HEAT EXCHANGER
THERMISTOR
WATER OUTLET
UNIT
CONTROL
SUB
Sub-CPU
COMBUTION FAN
FAN
AC100V
VARISTOR
RELAY 8
RELAY 7
AC120V
HOT
W
BL
RELAY 4
RELAY 5
SV3
SV2
RELAY 3
RELAY 1
SV1
SV0
IG
SV4
RELAY 2
BK
DC90V
DC140V
W
<CN101>
RELAY 10
RELAY 9
<CN102>
BLBLBL
G
BK
BK
R
R
BOARD
CIRCUIT
POWER
WOWY
<CN104>
<CN92>
BL
<CN89A>
SECONDARY
PRIMARY
C
DC12V
GND
DC15V
BYPASS FLOW CONTROL VALVE
15V POWER CIRCUIT
HEAT EXCHANGER FLOW SENSOR
FLOW CONTROL VALVE
RELAY 10
RELAY 7
RELAY 5
CIRCUIT
DRIVING
RELAY
RELAY 1
RELAY 2
DU
THERMAL FUSE
EARTH
(GFCI)
SAFETY DEVICE
CURRENT LEAKAGE
CONTROLLER
POWER
UNIT
PROCESSING
CENTRAL
CPU
VALVE Q2
SOLENOID
VALVE Q3
SOLENOID
VALVE 0
SOLENOID
VALVE Q1
SOLENOID
IGNITER
CIRCULATION PUMP
VALVE Q4
SOLENOID
GND
THERMISTOR
AIR INLET
5V POWER CIRCUIT
EARTH
DFR
FLAME DETECTING CIRCUIT
POWER CONTROL CIRCUIT
GAS PROPORTION VALVE
FLAME ROD
G
GROUND
(BK W)(BL W)
BL
WW
BK
RBR Y BL
BR
BL
R
Y
R
BR
Y
BL
BL
BL
BL
BL
BL
BL
BL
BL
BL BL
BL
RC TERMINAL
W
BK
BL(GND)
R(Vcc)
Y(FG)
BR(Vs)
THERMAL FUSE
FLAME ROD
FAN MOTOR
EARTH
RC-7650M
RC-7649M
ELECTRODE
(OPTIONAL)
REMOTE CONTROLLER
IGNITER
W
W
R
BK
TRANSFORMER
W
W
SWITCH
HIGH-LIMIT
(OPTIONAL)
SC-201-6M
SYSTEM CONTROLLER
COLOR CODING
BK : Black
O : Orange
BL : Blue
V : Violet
R : Red
W : White
SC-101-6M-B
SC-101-3M-B
SYSTEM CONTROLLER
W
BL
WW
BKBK
<AC120V>
Y : Yellow
GY : Gray
BR : Brown
G : Green
BL
<CN27>
LS
LS
SM
SM
P
QS
IG
B5
1
1
1
2
3
1
1
4
5
2
3
6
4
5
2
3
6
1
5
4
2
3
6
1
123456123456 789
5
4
2
3
6
7
11
10
8
9
12
14
13
15
10
12 11
14 13
16 15
18 17
20 19
22 21
24 23
26 25
28 27
30 29
32 31
1
5
4
2
3
6
7
8
1
5
4
2
3
1
2
3
6
184
FM
2
1
5
6
4
3
2
1
5
6
4
3
13
12
11
10
Q4
14
SV
Q3
SV
Q2
SV
0
SV
DU
Q1
SV
2
1
2
1
2
1
2
1
2
1
12
34
56
78
9
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