Bradford White UPV Series Service Manual page 26

UPV Service Procedure VII – Gas Control Testing and Replacement
ECO (Energy Cut Out) Testing
The Resideo gas control is designed with an ECO
device that will reset.
To reset the gas control after a status code (4), turn the gas control knob to the "OFF" position and
wait a minimum of (5) minutes before relighting following the instructions located on the lighting
instruction label or the lighting instructions located in the installation and operation manual.
Determine Water Temperature Inside Tank
Stored water may be HOT when performing the following steps in this
procedure. Take necessary precaution to prevent personal injury.
Step 1. Position gas control power switch to "OFF" position.
Step 2. Draw approximately 4 gallons of water from drain valve into a container and discard. Draw
an additional gallon and immediately measure water temperature using an accurate
thermometer (It may be necessary to open a hot water faucet to allow heater to drain).
Step 3. Compare the measured water temperature with the setting on the gas control. In most
instances, they should not differ by more than approx. 10°F.
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115 volt potential exposure.
Use caution to avoid personal injury.
WARNING
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WARNING