Bradford-white D-4-504S6FSX User Manual download pdf (Page 27)

Page 27

Gas Control Assembly to the Thermal Well (cont’d)

Step 8. To resume operation, follow the instructions located on the water heater

lighting instruction label. Or, use the lighting instructions located in the water heater

installation and operating manual.

Flammable Vapor Sensor Testing

Step 1. Move the gas control power switch to the “OFF”

position.

Step 2. Disconnect the flammable vapor sensor harness from

the gas control.

Step 3. Using a multi-meter set to the ohms setting, measure

the resistance of the flammable vapor sensor and resettable

thermal switch. The resistance must be between 3,000 and 48,000

ohms. If the resistance is out of this range, verify that the

resettable thermal switch has not been tripped. If it hasn’t, replace

the thermal switch.

120 VAC Circuit Trace

Step 1. Verify 120VAC and proper polarity are at the wall outlet.

Step 2. With the water heater plugged in and the gas control power switch in the

“ON” position verify LED status.

Flammable Vapor Sensor Testing

CAUTION

Do not use standard multi-meter probes for this testing. Doing so will damage the con-

nector. Use special pin type electronic probes or small diameter wire pins inserted into

connector.

Gas control power

switch

Flammable vapor

sensor harness

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Bradford-white D-4-504S6FSX User Manual Page 27