PDX Series
How to Use This Manual
It is intended for this manual to be used by qualified service personal for the primary purpose of troubleshooting and repair of the Bradford White TTW Series water heaters. Understanding the sequence of operation section of this manual will contribute greatly to troubleshooting the water heater.
The Honeywell WV4460E Electronic Gas Control will display error codes in the event of abnormal operation. Error codes are listed in the troubleshooting chart beginning on page 12 of this service manual. The troubleshooting chart will also indicate the probable cause for the error code and direct the service professional to a service procedure to properly diagnose the abnormal operation.
In some difficult to diagnose conditions, it may be necessary to isolate the heater from the vent system to determine the problem.
Contact the Bradford White technical support group immediately if diagnosis can not be made using the methods described in this service manual.
Tools Required for Service | |||
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Manometer: |
| A liquid “U” tube type or a digital | |
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| device is used to measure gas and/or air pressure and vacuum. | |
A digital type is strongly recommended. This device is used to measure | |||
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| electrical values. The meter you select must have the capability to | |
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| measure volts AC, volts DC, Amps, | |
Electronic Probes: | In some cases, standard | ||
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| not be effective to obtain certain voltage and ohm reading. It will be | |
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| necessary to have special electronic “pin” type | |
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| These probes are available at most electronic wholesale outlets. | |
Thermometer: | Used to measure water temperature. An accurate thermometer is | ||
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| recommended. | |
Water Pressure Gage: | Used to measure water supply pressure. Also used to determine tank | ||
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| pressure by adapting to the drain valve of the heater. | |
Gas Control Service Tool: BWC part number | |
| the gas control from gas control thermal well. Available from |
| your Bradford White parts supplier. |
Various Hand Tools: | Pipe wrench, channel locks, open end wrenchs (3/8",7/16",½"), |
| 12" crescent wrench, Allen wrench set, screw drivers (common & |
Phillips), ¼" nut driver, pliers (common & needle nose), socket set, side cutters wire cutters, wire strippers, wire crimpers, torpedo level, small shop vac, step ladder, and flashlight, 5 gallon pail.
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