INS
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14
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Residential 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-
tions or use compression fittings which
don’t require soldering. Compression
fittings are easier to install than solder
-
ing pipe. Check with local plumbing
officials to determine what types of
pipe materials are suitable for your
location. Do not use lead-based solder.
NOTICE!
Do not solder pipes while
they are attached to the water heater.
The water heater’s inlet and outlet
connections 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. Attach
the threaded adapters to the water
heater’s connections (using Tef
-
lon® tape or pipe joint compound).
Connect the home’s water pipes by
soldering, keeping the connections 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 connection (J-tube) that
has an orientation mark that must line
up with arrow (in a 12 o’clock position).
3
Connect the hot water supply
using 3/4 inch NPT to the hot
water outlet. Follow the same
connection guidelines as for the cold
water supply.
4
Install insulation on the water
pipes. Insulating the hot water
pipes can increase energy
efficiency.
5
Double check to make sure
the hot and cold water pipes
are connected to the correct
hot and cold water fittings on the
water heater.
6
If needed, install a Pressure
Reducing Valve and a Thermal
Expansion Tank.
Figure 18 - A Pressure Reducing Valve is
required if your home’s water pressure is
above 80 psi.
Figure 19 -
The Thermal Expansion Tank
should be pressurized with air, to match the
home’s incoming water pressure.
Step 10:
Verify connections and
completely fill tank
To remove air from the tank and allow
the tank to fill 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-flow ball valve
Figure 20 -
Fully open the cold water supply
valve.
INSTALLATION
