Noritz NR50-OD User Manual

57
Circuit Board Checkpoints
Note 1) t Temperature characteristic of inlet / outlet thermistor
Water Flow Sensor
Thermal Fuse
CN59
CN59
CN59
CN59
CN59
CN59
CN59
CN59
CN78
Flame Rod
Inlet Thermistor
Outlet Thermistor
Water Control Valve
High Limit Switch
CN86
Te rminal
CN86
CN78
Primary Gas
Solenoid Valve
Igniter
Fan Motor
Fan Motor
CN27
CN1
CN1 CN1
CN1
CN10
CN10 CN10
CN10
Gas Solenoid
Valve 2
Gas Solenoid
Valve 1
Gas Proportioning
Valve
Flame Rod
Power Supply
Remote Controller
R-BL
BL-R
Y-BL
1
4
5
6
4
6
BL-
Electrode
1
W-W
15
W-W
W-W
13
1
R-BL8
BL-
Burnercase
1
14
3
14
1
Y-BL
W-G
W-V
W-O
W-BK
21
35
37
34
36
–
Y-BL
BR-BL
R-BL
1
4
3
W-BL
BK-W2
4
2
–
2
2
4
6
R-BL
BK-BL1
1
BL-
Burnercase
4
BL-
Electrode
1
6
–
3
–
–
–
GY-BL26
W-BK
12
—
——
—
CN & Pin No.
Circuit Board Checkpoints
Part
No.
Ref
1
2
4
13
3
15
5
6
7
8
9
12
10
11
14
—
—
Normal Value
CN & Pin No.
Harness
Color
Remarks 1
DC14 – 16V
DC0.5 – 15V
more than 1440 pulse/min. (more than 24Hz)
2Ω or less
YI (+) BI (–)
DC80 – 100V
75kHz – 92kHz
DC0.45 μA or less
DC0.6 – 4V
DC0.6 – 4V
DC14 –16V
DC1 –16V
DC1 –16V
DC1 –16V
DC1 –16V
DC1V or less
DC80 – 100V
AC90 – 110V
1.0 – 2.0kΩ
DC11 – 13V
DC0 – 43V
(120Hz – 387Hz)
7200 – 23200pulses/min.
less than 1Ω
When no ame is detected
32°F – 212°F
32°F – 212°F
Measure coil resistance
Measure coil resistance
Measure coil resistance
Measure coil resistance
Measure contact resistance
When valve is fully open.
(ON/OFF switch OFF)
When igniter is sparking
75kHz – 92kHz
50 – 90Ω
DC0.3 – 15V
DC1 μA or more
1.0 – 2.0kΩ
1.0 – 2.0kΩ
DC80 – 100V
At ame detection
Remarks 2
DC13 – 16V
AC90 – 110V
Note 1)
Note 1)
Temperature ( ˚ F)
Temperature (
˚C )
Resistance (kΩ)
7.010.315.523.7
32
020
6850
10
86
30
1.41.9
2.53.54.9
50
122
104
40
140
60
158
70
176
80
<NR50-OD / NR66 (-SV,-OD) / N-0531S (-OD), NR71 (-SV,-OD) / N-0631S (-OD)>
CN92
CN92
CN27

Noritz NR50-OD Specifications

General

Brand	Noritz
Model	NR50-OD
Category	Water Heater
Language	English