TriangleTube SMART Series, Инструкция по установке и обслуживанию

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23
CHAPTER
5
CHAPTER 5 - WATER HEATER MAINTENANCE
5.1. Maintenance Schedule
5.1.1 Annual service by qualified service tech-
nician should include the following:
¨
Any procedure required by local codes.
¨
Check air vent operation.
¨ 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.
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 or seri-
ous injury.
¨
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 contin-
ues to release water, close cold water inlet to water
heater immediately. Follow draining instructions, to
relieve pressure from the tank and replace T&P relief
valve. If T&P relief valve weeps periodically, it may
be due to thermal expansion see
“Thermal Expan-
sion” on page 4.
Do not plug T&P relief valve or
discharge piping.
Plugging T&P relief valve or discharge piping
can cause excessive pressure in water heater,
resulting in substantial property damage, se-
rious 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.
WARNING
DANGER
5.1.2 Homeowner monthly maintenance to in-
clude:
¨
Check for air.
• Manual air vent-open and close briefly to re-
lease any air.
¨
Check for leaks.
• Visually check valves, pipes and fittings for leaks.
Call qualified service technician to repair any
leaks.
5.2. Filling Water Heater
See
“Filling the Inner (Domestic Water) Tank” on page
21 and “Filling the Outer (Boiler Water) Tank” on page
21 .
5.3. 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.
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.
• If boiler water does not contain sufficient antifreeze,
then the boiler water and domestic water must be
drained.
If antifreeze is used in boiler water, check concentration.
Boiler water (including additives) must be practically
non-toxic, having toxicity rating or class of 1, as list-
ed in
Clinical Toxicology of Commercial Products.
A
maximum 50/50 mixture of inhibited propylene glycol
is recommended. Follow antifreeze manufacturer’s in-
struction.
Do not use automotive, ethylene glycol or pe-
troleum-based antifreeze. Do not use any un-
diluted antifreeze. This can cause substantial
property damage, serious injury, or death.
CAUTION
WARNING