46
An automatic gas shut-off device (ECO) is incorporated in the sensor and control board which will shut off all gas supply
to the burner if the water heater temperature exceeds 200°F (93°C). Should the ECO function (open), the water
temperature should be reduced to approximately 120°F (49°C) and call a qualified service agent to place the water
heater in operation. The water heater must have the problem corrected by a qualified service person before putting the
water heater back in operation. It is recommended that all service work be performed by a qualified service agency.
If the water heater is to remain idle for 30 days or more or is subjected to freezing temperatures while shut off, the water
heater and piping should be fully drained (See “To Drain the Water Heater”) and the drain valve should be left fully
open.
WARNING
Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a long period of time
(generally two weeks or more). Hydrogen gas is extremely flammable. To prevent the possibility of injury under these conditions,
we recommend the hot water faucet to be open for several minutes at the kitchen sink before you use any electrical appliance
which is connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping through the
pipes as hot water begins to flow. Do not smoke or have open flame near the faucet at the time it is open.
DANGER
DO NOT ATTEMPT TO REPAIR GAS VALVE.
DO NOT ATTEMPT TO REPAIR CONTROL BOARD.
DO NOT ATTEMPT TO REPAIR VENTURI.
DO NOT ATTEMPT TO REPAIR TRANSFORMER.
DO NOT ATTEMPT TO REPAIR PRESSURE SWITCH.
GENERAL
KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE AND OTHER
FLAMMABLE VAPORS AND LIQUIDS.
Water heater maintenance includes periodic tank flushing and cleaning, and removal of lime scale. The unit should be inspected
and adjusted to maintain proper combustion. Refer to Table 5, “Suggested Maintenance Schedule”. A periodic inspection of the
venting system should be made.
BURNER FLAME CHECK
At the time of installation and at monthly intervals, a visual check of the burner flames should be made to determine if they are
burning properly. The main burner may be seen through the sight glass window on the front of the combustion insert mounting
bracket (Figure 27). The burner flames should be a blue flame near the burner surface in a uniform flame pattern. Occasional
yellow or white streaks are normal.