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MAINTENANCE PROCEDURES
BURNER INSPECTION AND CLEANING
1. The burner must ame evenly over the entire surface of the burner head when operating
correctly.
2. The ame should burn with a clear, blue, stable ame.
3. Presence of a yellow ame or of black deposits on the burner head indicates cleaning
and/or burner replacement should occur.
MAINTENANCE BLOWER
1. The fan motor is permanently lubricated and does not require periodic lubrication.
2. If the motor fails, it must be replaced by a qualied technician only.
PURGE THE PRESSURE RELIEF VALVE
If a pressure relief valve discharges periodically, this may be due to thermal expansion occur-
ring in a water supply system in a closed circuit. Contact the water supplier or local plumbing
inspector for the best way to solve this problem. Do not block the pressure relief valve.
LIME SCALE CLEANING PROCEDURE
Materials required:
· Five gallon container
· Four gallons of virgin food grade white vinegar or virgin food grade citric acid
· Small inline recirculation pump capable of circulating 2 - 4 gpm (8 – 16 l/m)
· Set of hoses for connecting recirculation pump to and from the pump and the ve gallon container.
Refer to the diagram on the next page to complete this procedure.
1. Disconnect electrical power to the water heater.
2. Close the shutoff valves V3 and V4 on both the hot water and cold water lines.
3. Connect a hose H1 form the pump outlet to the cold water line V2 into the heater.
4. Connect drain hose H2 from the hot water outlet line V1 and route into ve gallon recircula-
tion container.
5. Pour approx. four (4) gallons of virgin, food grade,white vinegar or citric acid into pail.
6. Place the pump suction hose H2 into the cleaning solution
7. Open valves V1 and V2 into the water heater.
8. Operate the pump. Circulate the cleaning solution through the water heater for at least 45 minutes.
9. Turn off the pump.
10. Rinse the cleaning solution from the water heater by closing valve V2 and opening valve V4,
ow water through the heater and into a container or drain for at least ve minutes.
11. Close Valve V1 and Open Valve V3 this places the house back online.
12. Disconnect all hoses.
13. It is also wise to clean the water inlet screen at this time. Close Valve V3 and V4 to do so.
Clean the water inlet screen and remove any debris.
14. Replace the screen and open valves V3 and V4 once more. Checks for leeks.
15. Return heater to operation by following start up instructions.
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