Chapter 4 - Water Heater Maintenance; Maintenance Schedule; Annual Service By Qualified Service Technician; Homeowner Monthly Maintenance - TriangleTube PRESTIGE Excellence 110 Installation & Maintenance Manual

CHAPTER 4 - WATER HEATER MAINTENANCE

4.1.

Maintenance Schedule

4.1.1 Annual service by qualified service tech-
nician should include the following:
¨ Any procedure required by local codes.
¨ Verify system pressure. Air venting procedure may
require adding water to bring system up to pres-
sure, typically 12 psig.
¨ Manually operate T&P relief valve at least once a
year. This will release some hot water.
WARNING
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 substantial property damage, serious
injury, or death.
¨ 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 con-
tinues to release water, close cold water inlet to
water heater immediately. Follow draining instruc-
tions, and replace T&P relief valve. If T&P relief valve
weeps periodically, it may be due to thermal ex-
pansion see Section 2.7 on page 5. Do not plug
T&P relief valve or discharge piping.
WARNING
Plugging T&P relief valve or discharge piping
can cause excessive pressure in water heater,
resulting in substantial property damage.,
serious injury, or death.
¨ Follow instructions on circulator to oil it, if required.
¨ Check mixing valve, valves, pipes and fittings for
leaks.
¨ Check function of field-installed controls and valves.
See component manufacturer's instructions.
¨ Review homeowner's maintenance responsibilities
and their frequencies, including any not listed in
the following section.
4.1.2 Homeowner monthly maintenance to in-
clude:
¨ Check for air.
• Manual air vent - open and close briefly to re-
lease any air.
¨ Visually check valves, pipes and fittings for leaks.
Call qualified service technician to repair leaks.
4.2.

Filling Water Heater

See Sections 3.1 and 3.2 on page 9.
4.3.

Draining Water Heater

Drain water heater if it will be shut off and exposed to
freezing temperatures. Freezing water will expand and
damage water heater.
• If boiler water contains sufficient antifreeze, then
only the domestic water needs to be drained.
WARNING
Close boiler water isolation valves and re-
lieve system pressure to below 15 psig in out-
er tank before draining inner tank to prevent
damage to inner tank. Failure to comply with
this instruction can result in substantial prop-
erty damage.
• If boiler water does not contain sufficient antifreeze,
then the boiler water and domestic water must be
drained.
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