Table of Contents
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Ultra Low NO
Introduction ................................................................................................................................4
How to Use This Manual..........................................................................................................4
Tools Required for Service .......................................................................................................5
Troubleshooting.........................................................................................................................6
Burner Inspection, Cleaning & Replacement .........................................................................9
Pilot Testing, Cleaning & Replacement ..................................................................................11
Gas Control Testing & Replacement.......................................................................................13
Thermopile Testing ...................................................................................................................16
Igniter, Electrode Testing and Replacement ...........................................................................17
Inner Door Removal and Replacement ...................................................................................18
Diptube Inspection & Replacement.........................................................................................21
Anode Inspection & Replacement ...........................................................................................22
Glossary of Terms .....................................................................................................................23
Parts List .....................................................................................................................................24
2
2
UDV Series
Direct Vent Water Heaters
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UDV SVC Procedure
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Table of Contents
