A.O. Smith 500, Instruction Manual

Page: 62 / 76

62
MAINTENANCE SCHEDULE
TABLE 19
COMPONENT OPERATION INTERVAL REQUIRED
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Burn hazard.
Hot water discharge.
Keep hands clear of drain
valve discharge.
To drain the water heater storage tank:
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MAINTENANCE
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PRECAUTIONS
Do not operate the water heater if it has
been exposed to or exhibits the following:
Exposed to flooding or water damage.
•
External damage.
•
Firing without water.
•
Sooting.
•
Do not operate the water heater until all corrective steps
have been made by a qualified service technician.
CAUTION
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Explosion Hazard
Overheated water can cause
water tank explosion.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided.
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