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Simulated resistive device testing – Bradford White TW4-75S-76B-3X User Manual

Page 30

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TTW SERVICE PROCEDURE VII

Simulated Resistive Device Testing

Simulated Resistive
device

Step 1.

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

Step 2.

Disconnect simulated resistive device from
gas control.

Step 3.

Using a multi-meter set to the ohms setting
check resistance of simulated resistive
device. Resistance must be within 25,000
ohms and 45,000 ohms. If outside of this
range replace simulated resistive device.

Simulated Resistive Device Testing

Simulated Resistive
device

Electronic
“pin type”
Meter Probes

Multi-meter set to
ohms setting

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For water heaters with serial numbers
that begin with “J” or sooner.

For water heaters with serial numbers
that begin with “K” or later.

Simulated Resistive
device

Electronic
“pin type”
Meter Probes

Multi-meter set to
ohms setting

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