Residential Standard Gas Water Heater Service Handbook • 3
BASICS
Residential Standard Gas Water Heater Service Handbook • 3
BASICS
Residential Standard Gas Water Heater Service Handbook • 3
Tank Leak ............................................................................................................................................................................... 15
Condensation .................................................................................................................. ........................................ 15
Leaking Plumbing Connections ............................................................................................................................... 15
Drips from the T&P Relief Valve Discharge Pipe ..................................................................................................... 15
Temperature Too High ........................................................................................................................................................... 16
Low Water Pressure .............................................................................................................................................................. 16
Water Odor ........................................................................................................................................................................... 16
Service Procedures ........................................................................................................................................... 17
Removing the Manifold/Burner Assembly ............................................................................................................................ 17
Removing the Burner from the Manifold/Burner Assembly ................................................................................................. 17
Replacing the Pilot/Thermopile Assembly ............................................................................................................................ 17
External Inspection and Cleaning of the Base-Ring Filter ..................................................................................................... 18
Cleaning the Combustion Chamber and Flame Arrestor....................................................................................................... 18
Replacing the Manifold/Burner Assembly ............................................................................................................................ 19
Testing the Igniter System ..................................................................................................................................................... 19
Removing and Replacing the Gas Control Valve/Thermostat ................................................................................................ 20
Removing the Gas Control Valve/Thermostat: ........................................................................................................ 20
Replacing the Gas Control Valve/Thermostat: ........................................................................................................ 20
Draining and Flushing ............................................................................................................................................................ 20
Supplements..................................................................................................................................................... 21
Evaluating Combustion and Ventilation Air Supply ............................................................................................................... 21
Attic Installations .................................................................................................................................................................. 23
Overview ...................................................................................................................... ........................................... 23
Pilot Outage ............................................................................................................................................................ 23
Elevated Air Temperature: ........................................................................................................................ 24
Insufficient Makeup Air ............................................................................................................................ 24
Blocked Air Screen or Flame Arrestor ....................................................................................................... 24
Improper Venting of the Water Heater .................................................................................................... 24
Decompression ........................................................................................................................................ 25
Wind ........................................................................................................................................................ 25
Water Damage ........................................................................................................................................................ 25
Elevated Water Temperature .................................................................................................................................. 25
Field Installation of Draft Hoods ........................................................................................................................................... 26
Tools and Materials ................................................................................................................................................. 26
Types of Draft Hoods Covered in this Section ......................................................................................................... 26
Types of Vent Pipe Covered in this Section ............................................................................................................. 27
Installation Procedure ............................................................................................................................................. 27
Coupling .................................................................................................................................................................. 27
Type B Draft Hood Connectors ................................................................................................................................ 28
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