INS
TALLA
TION
8
•
Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
BACKGROUND:
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). Back
fl
ow preventers are o en
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 prac -
cal and inexpensive way to help avoid
damage to the water heater, washing
machine, dishwasher, ice maker and
even toilet valves. If your toilet oc-
casionally runs for no apparent reason
(usually brie
fl
y at night), that may be
due to thermal expansion increasing
the water pressure temporarily.
✓
Water pipe and
tank leaks
Leaks from plumbing pipes or from
the water heater itself can damage
property and could cause a
fi
re risk.
• Install an automatic leak detec-
tion and shutoff device (available
at your local plumbing supplier).
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 the water heater
in a drain pan (available at your
local plumbing supplier) (Figure 8)
that is piped to an adequate 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 maximum depth of
1-3/4” ( 45mm).
✓
Water tempera-
ture regula on
Figure 9 -
Thermostatic Mixing Valves can
help prevent scalds.
Install Thermosta c Mixing Valves if it
is necessary (Figure 9) to regulate the
temperature of the water . Consult the
valve manufacturer’s instruc ons or a
quali
fi
ed person.
.
WARNING! Even if the water
heater thermostat is set to a rela vely
low temperature, hot water can scald.
Install Thermosta c Mixing Valves
to reduce the risk of scalding (page
4).
BACKGROUND:
A Thermosta c Mix-
ing Valve mixes hot water from the
water heater with cold water to more
precisely regulate the temperature of
hot water supplied to
fi
xtures. If you
aren’t sure if your plumbing system is
equipped with properly installed and
adjusted Thermosta c Mixing Valves ,
contact a quali
fi
ed person for more
informa on.
Step 2:
Verify that the loca on
is appropriate
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 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.
NOTICE: Water heater must be level!
NOTICE: Water heater must be level!
INSTALLATION