Rinnai B20 Service Manual download pdf (Page 34)

REU-2532W Series 34 Rinnai

19. Diagnostic Points

Flow Chart is on page #28

Wiring Diagram is on page #35

Component

Measurement Point

Normal Value Notes

Comp. No. Wire Color

Surge Protector F

7

Blue - Brown AC 108 - 132 V

Water Flow Control Device B

2

Red-Blue DC 11 - 13 V Power Supplied to Unit

Gray-Orange DC 11 - 13 V Power Supplied to Unit

Gray-Yellow

Below DC 1 V (Limiter On)

Full Open Position

DC 4 - 6 V (Limiter Off)

Gray-Brown

Below DC 1 V (Limiter On)

Full Close Position

DC 4 - 6 V (Limiter Off)

By-pass Flow Control Device G

1

Brown-White

Orange-White

Ye l l o w-Wh i t e

Red-White Gnd

DC 2 - 6 V Unit In Operating Mode

15 - 35 kΩ

Remote Control D

1

Black-Black DC 11 - 13 V

Water Flow Sensor B

4

Red - Black DC 11 - 13 V

On 0.82 gal/min (30 Hz)

Over 1800 pulse/min

Off 0.6 gal/min (20 Hz)

Below 1200 pulse/min

Yellow - Black Gnd DC 4 - 7 V (Pulse 17-460 Hz)

Combustion Fan A

1

Red-Black DC 6 - 45 V

Yellow-Black DC 11 - 13 V

White-Black Gnd DC 6 - 45 V (33-400 Hz)

Flame Rod C

1

Yellow-Gnd AC 5 - 150 V After Ignition

Yellow-Flame Rod Over DC 1 µA Flame Condition

Modulating Valve C

2

Pink-Pink

DC 2 - 15 V

67 - 81 Ω

Outgoing Thermistor

Heat Exchanger

Outgoing Thermister

B

5

B

6

White-White

59°F 11.4 - 14.O KΩ

86°F 6.4 - 7.8 KΩ

113°F 3.6 - 4.5 KΩ

140°F 2.2 - 2.7 KΩ

221°F 0.6 - 0.8 KΩ

Air Thermistor B

1

White-White

Thermal Fuse

B

3

C

3

Red-Red Below 1Ω

Ignitor F

8

Gray-Gray AC 90 - 110 V

Main Solenoid Valve E

1

Pink - Black

DC 80 - 100 V

1.7 - 2.1 KΩ

Solenoid Valve 1 E

2

Yellow - Black

DC 80 - 100 V

1.7 - 2.1 KΩ

Solenoid Valve 2 E

3

Blue-Black

DC 80 - 100 V

1.7 - 2.1 KΩ

Solenoid Valve 3 E

4

Brown - Black

DC 80 - 100 V

1.7 - 2.0 KΩ

TRANSFORMER VOLTAGES AND RESISTANCES

Primary Windings F

7

Blue-Brown 51 - 63 Ω

Secondary Windings F

9

White-Black AC 90 - 110 V

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 71 72

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