PLUS LINE
A6 Water heater maintenance
Maintenance schedule – annual service technician
Annual service by qualified service technician to include:
•Any procedures required by local codes.
•Check air vent operation.
•Verify system pressure. Air venting procedure may require adding water to bring system up to pressure, typically 12 psig.
•Manually operate T&P relief valve at least once a year. This will release some hot water.
Before operating T&P relief valve, make sure no one is in front of or around T&P relief valve discharge piping. Hot discharge water can cause severe personal injury or substantial property damage.
Maintenance schedule – monthly homeowner
•Move operating lever to open position for a few seconds and then move it back, allowing it to snap closed. After T&P relief valve is operated, if it continues to release water, close cold water inlet to water heater immediately. Follow draining instructions, and replace T&P relief valve. If T&P relief valve weeps periodically, it may be due to thermal expansion (see “Thermal Expansion”, page 13). Do not plug T&P relief valve or discharge piping.
Plugging T&P relief valve or discharge piping can cause excessive pres- sure in water heater, resulting in severe personal injury, death or substantial property damage.
•Follow instructions on circulator to oil it, if
•Check valves, pipes and fittings for leaks.
•Check function of
•Review homeowner’s maintenance responsibilities and their frequencies, including any not listed in the following paragraphs.
Homeowner monthly maintenance to include:
•Check air vent operation:
•Automatic air vent — remove cap (see Figure 8). Briefly push in valve and release it to clean valve seat. Screw cap on completely, then unscrew one turn. If air vent does not operate, call qualified service technician.
Figure 8 | A | |
B | ||
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Remove air vent cap to check operation
•Visually check valves, pipes and fittings for leaks. Call qualified service technician to repair leaks.
20 | Part Number |
