INSTALLATION
14 • Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
IF YOU HAVE COPPER PIPES:
If your home has copper water pipes,
you can solder the water pipe connec-
ons or use compression fi ngs which
don’t require soldering. Compression
fi ngs are easier to install than solder-
ing pipe. Check with local plumbing of-
fi cials to determine what types of pipe
materials are suitable for your loca on.
Do not use lead-based solder.
NOTICE: Do not solder pipes while they
are a ached to the water heater. The
water heater’s inlet and outlet connec-
ons contain non-metallic parts which
could be damaged. The proper way to
connect the water heater to copper
water pipes is as follows:
• Solder a short length of pipe (about
a foot or so) to a threaded adapter
using only lead-free solder. A ach
the threaded adapters to the water
heater’s connec ons (using Tef-
lon® tape or pipe joint compound).
Connect the home’s water pipes by
soldering, keeping the connec ons at
the water heater cool with wet rags.
NOTE: Do not over apply joint com-
pound.
NOTICE: This water heater model con-
tains an outlet connec on (J-tube) that
has an orienta on mark that must line
up with arrow (in a 12 o’clock posi on).
3
Connect the hot water supply
using 3/4in NPT to the hot
water outlet. Follow the same
connec on guidelines as for the cold
water supply.
4
Install insula on on the water
pipes . Insula ng the hot water
pipes can increase energy
effi ciency.
5
Double check to make sure
the hot and cold water pipes
are connected to the correct
hot and cold water fi ngs on the
water heater.
6
If needed, install Pressure
Reducing Valve and install a
Thermal Expansion Tank.
Figure 18 - A Pressure Reducing Valve is
required if your home’s water pressure is
above 80 psi/550kPa.
Figure 19 - The Thermal Expansion Tank
should be pressurized with air, to match the
home’s incoming water pressure.
Step 10:
Verify connec ons and
completely fi ll tank
To remove air from the tank and allow
the tank to fi ll completely with water,
follow these steps:
1
Remove the aerator at the
nearest hot water faucet. This
allows any debris in the tank
or plumbing system to be washed out.
2
Turn the cold water supply
back on.
Full-fl ow ball valve
Figure 20 - Fully open the cold water supply
valve.
INSTALLATION
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