OPERATIONAL CONDITIONS
Water Heater Sounds
During the normal operation of the water heater, sounds or noises may be heard. These noises are common and may result from the following:
1.Normal expansion and contraction of metal parts during periods of
2.Sediment buildup in the tank bottom will create varying amounts of noise and may cause premature tank fail- ure. Drain and flush the tank as directed under “Drain- ing and Flushing”.
Safety Shut-Off (Pressure Switch)
This water heater is equipped with a pressure switch that protects the unit by shutting it down in the event that:
•A blockage occurs in the combustion air inlet, the flue gas exhaust outlet, or both the inlet and outlet.
•The condensate line freezes and the condensate “backs up” and fills the exhaust outlet.
•The blower fails to operate, or operates improperly.
•The unit begins to operate at an abnormally low input level.
Energy Cut-Off (ECO)
A high temperature limit switch, or ECO, is used to shut down the water heater if the water temperature exceeds 203°F (95°C). The ECO will automatically reset when the temperature cools sufficiently. If the ECO shuts down the heater repetitively, contact a qualified professional for service.
MAINTENANCE
Draining and Flushing
It is recommended that the tank be drained and flushed every 6 months to remove sediment which may buildup during operation. The water heater should be drained if being shut down during freezing temperatures.
To drain the tank, perform the following steps:
1.Turn off the gas supply at the Manual Gas
2.Open a nearby hot water faucet and run until the water is no longer hot.
3.Close the cold water inlet valve.
4.Open the
5.Open the water heater drain valve and allow all of the water to drain from the tank.
6.Flush tank to remove sediment.
7.Close the drain valve, replace access door, refill the tank, and restart the heater as directed under “Operating Your Water Heater”.
Figure 23: Drain Valve Access
Drain Valve |
Behind |
Access Door |
IMPORTANT: Condensation may occur when refilling the tank and should not be confused with a tank leak.
Temperature and Pressure Relief Valve
Manually operate the temperature and pressure relief valve at least once
a year to make sure it is working properly. To prevent water damage, the valve must be properly connected
to a discharge line which
terminates at an adequate drain. Standing clear of the
outlet (discharged water may be hot), slowly lift and release
the lever handle on the
temperature and pressure relief valve to allow the valve to operate freely and return to its closed position (see figure 24). If the valve fails to completely reset and continues to release water, immediately shut off the manual gas valve and the cold water inlet valve, and call a qualified service technician.
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