Water Is Too Hot; Water Heater Makes Sounds; Water Leakage Is Suspected - A.O. Smith del and del Installation & Operation Manual

6. Look for leaking or open hot water faucets.

WATER IS TOO HOT

1. Refer to TEMPERATURE REGULATION section.

WATER HEATER MAKES SOUNDS

1. See MAINTENANCE

WATER LEAKAGE IS SUSPECTED

1. Check to see if the heater drain valve is tightly closed.
2. The apparent leakage may be condensation which forms on
cool surfaces of the heater and piping.
3. If the outlet of the relief valve is leaking it may represent:
• Excessive water pressure.
• Excessive water temperature.
• Faulty relief valve.
Excessive water pressure is the most common cause of relief
valve leakage. It is often caused by a "closed system". A check
valve in the inlet system will not permit the expanded hot water
volume to equalize pressure with the main. A relief valve must
release this water or the water heater or plumbing system will
be damaged.
When such a condition is encountered, local codes or inspection
agency should be consulted to determine which system is
acceptable in your area. These may consist of:
• Installation of a second relief valve with lower setting
than the primary safety relief valve.
• An expansion tank of suitable pressure and provision
to avoid water logging.
• Removal of the check valve.
IF YOU CANNOT IDENTIFY OR CORRECT
THE SOURCE OF THE MALFUNCTION
1. Place the water heater electrical switch in the OFF position.
2. Close the cold water inlet valve to the heater.
3. Contact your dealer.
NOTES
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