Maintenance and Service
WARNING: Always turn off the electrical power supply, the manual gas control valve,
and the manual water valve when servicing.
The unit should be checked once a year by a certified and trained technician. If repairs are
needed, a certified and trained technician should do the repairs and services.
Regular Maintenance
Do this the first time immediately after installation.
1. Clean the cold water inlet filter (refer to figure below).
2. Be sure that all openings for combustion and ventilation air are not blocked.
3. Check that the vent pipe is not blocked.
4. Check the gas pressure.
5. Keep the area around the water heater clear. Remove any combustible materials,
gasoline or any flammable vapors and liquids.
These systems and parts should be checked at least once a year.
1. Venting system.
2. Burner.
3. Manually test the temperature and pressure relief valve to insure correct operation.
4. Periodically clean of the water filter (refer to figure above).
5. Heat exchanger. Remove the thermistor and check for a mineral coating. A mineral
coating on the thermistor requires flushing the heat exchanger with a de-scaling solution.
Allowing deposit build up will void your warranty and shorten the life of your water heater.
Turn Counter Clockwise to OPEN
and Turn Clockwise to CLOSE.
Summary of Contents for MOBIUS
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