INSTALLATION
8 • Residenal Hybrid Electric Heat Pump Water Heater Use and Care Guide
Water expands when
heated, and the increased volume
of water must have a place to go, or
thermal expansion will cause large
increases in water pressure (despite
the use of a Pressure Reducing Valve
on the home’s main water supply
line). Backow preventers are oen
installed in water meters and may not
be readily visible. As a result, most
all plumbing systems today are now
“closed,” and many homes now need
a Thermal Expansion Tank.
A Thermal Expansion Tank is a
praccal and inexpensive way to help
avoid damage to the water heater,
washing machine, dishwasher, ice
maker and even toilet valves. If your
toilet occasionally runs for no appar-
ent reason (usually briey at night),
that may be due to thermal expansion
increasing the water pressure tempo-
rarily.
✓
Water pipe and
Leaks from plumbing pipes or from
the water heater itself can damage
property and could cause a re risk.
• Install an automatic leak detec-
tion and shutoff device (available
). These devices can detect water
leaks and can shut off the water
heater’s water supply if a leak
occurs.
Figure 8 - A suitable drain pan piped to an
adequate drain can help protect flooring
from leaks and drips.
• If damage could occur as a result of
a leak from the water heater or
plumbing, install a suitable drain
pan (available at your local plumb-
ing supplier) under the water heat-
er (Figure 8) to catch condensation
or leaks in the piping connections
or tank. Install the water heater in a
drain pan that is piped to an ade-
quate drain. The drain pan must be
at least 2”/50mm wider than the
diameter of the water heater.
Install the drain pan so the water
level would be limited to a maxi-
mum depth of 1-3/4”/45mm.
✓
Water tempera-
Figure 9 - Thermostatic Mixing Valves help
prevent scalds.
Install Thermostac Mixing Valves, if it
is necessary, (Figure 9) to regulate the
temperature of the water. Consult the
valve manufacturer’s instrucons or a
qualied person.
A Thermostac Mix-
ing Valve mixes hot water from the
water heater with cold water to more
precisely regulate the temperature of
hot water supplied to xtures. If you
aren’t sure if your plumbing system is
equipped with properly installed and
adjusted Thermostac Mixing Valves,
contact a qualied person for more
informaon.
Before installing your water heater,
ensure that:
1
The water heater will be:
• Installed indoors close to
the center of the plumbing
system.
• In a suitable drain pan (if required)
piped to an adequate floor drain
(Figure 8).
• In an area that will not freeze
• In an area that is suitable for install-
ing the water heater vertically and
on a level surface.
• Installed where a typical home
appliance sound would not cause a
disturbance
• Not used for space heating.
INSTALLATION
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