Bradford White PDX-75S-70FB-3X - Manual (Page 30)

PDX SERVICE PROCEDURE VII
Flammable Vapors Sensor Testing
Page 30
PDX Series
Flammable Vapor
Sensor
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.
Flammable Vapor Device Testing
Flammable Vapor Sensor
Electronic
“pin type”
Meter Probes
Multi-meter set to
ohms setting
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.
(The following chart is for models with serial numbers starting with “J” or earlier.)
Flammable Vapor Sensor
Electronic
“pin type”
Meter Probes
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.
Multi-meter set to
ohms setting
(The following chart is for models with serial numbers starting with “K” or later.)
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