Bradford-White Corp PDX Series Powered Direct Vent Gas Water Heaters, PDX75S70F(B, CX), C)*(N

PDX Series

PDX SERVICE PROCEDURE VII

Flammable Vapors Sensor Testing

Flammable Vapor Device Testing

Step 1. Position power switch on gas control to the “OFF” position.

Step 2. Disconnect flammable vapor sensor from gas control.

Step 3. Using a multi-meter set to the ohms setting check resistance of flammable vapor sensor. (see caution below)

Resistance must be within 3,000 ohms and 48,000 ohms. If outside of this range replace flammable vapor sensor.

Multi-meter set to ohms setting

Electronic “pin type” Meter Probes

Flammable Vapor

Sensor

CAUTION

DO NOT use standard multimeter probes for this test.

Doing so will damage connector. Use special electronic

“pin type” probes or small diameter wire pins inserted

into connector.

Flammable Vapor

Sensor

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