Aqua Plus Product Manual

Water heater maintenance
Boiler water — read and comply with all requirements
under “Boiler water restrictions,” page 3.
Water from opened drain valves, unions and other
connections may be extremely hot. To avoid severe
personal injury, death or substantial property damage:
• Tighten all drain hose connections.
• Direct hot water away from all persons.
ATTENTION USER!
Have the water heater serviced at least once
annually
by a qualified service technician.
Follow the maintenance procedures below at least
monthly.
Read “Water heater temperature adjustment,”
page 27.
Failure to comply with the above can result in se-
vere personal injury, death or substantial property
damage.
MONTHLY maintenance by user
• At least MONTHLY, visually check valves, pipes and fittings
for leaks.
• Check hot water supply at several outlets. Make sure water
temperature is not too hot.
• Call qualified service technician to repair leaks or address
problems.
MONTHLY maintenance by user
• At least MONTHLY, visually check valves, pipes and fittings for
leaks.
• Check hot water supply at several outlets. Make sure water tem-
perature is not too hot.
• Call qualified service technician to repair leaks or address prob-
lems.
ANNUAL start-up by qualified service
technician
Obtain an Inspection and service kit (see “Replacement
parts,” page 38) before attempting to perform the an-
nual start-up. This kit contains items that will usually
have to be replaced.
Check water supply temperature at several outlets
to ensure the water temperature is acceptable for
intended use and that all temperature control devices
are functioning properly. Read page 3 and verify that
all requirements are met by the installation.
Perform the following procedures:

Perform any procedures required by local codes.

Verify system pressure both on domestic water and boiler water
sides.

Manually operate T&P relief valve at least once a year (see
Figure 28). This will release some hot water. Move operat-
ing 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 instruc-
tions, and replace the T&P relief valve. If T&P relief valve
weeps periodically, it may be due to thermal expansion.
Install an expansion tank if not already installed.

Follow instructions on circulator to oil it, if oil-lubricated.

Check valves, pipes and fittings for leaks.

Check function of all controls and valves (see control
manufacturer’s instructions).

Review homeowner’s maintenance responsibilities and
their frequencies, including any not listed in the follow-
ing paragraphs.
Drain the water heater if necessary
during shutdown periods
1. Drain the water heater if it will be shut off and exposed
to freezing temperatures. Freezing water will expand and
may damage water heater.
a. If boiler water contains sufficient antifreeze, then only
the domestic water needs to be drained.
b. If boiler water does not contain sufficient antifreeze,
then the boiler water and the domestic water must
be drained.
Figure 28 T&P valve operation
Before operating the T&P relief valve,
make sure no one is in front of or around
the T&P relief valve discharge piping. Hot
discharge water can cause severe personal
injury or substantial property damage.
Plugging T&P relief valve or discharge
piping can cause excessive pressure in the
water heater, resulting in severe personal
injury, death or substantial property dam-
age.
Part number 633-600-020/0118
28
AQUA PLUS
®
Series 2 indirect-fired water heaters — Product Manual