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NOTICE: Most water heater models
contain energy saving heat traps in the
inlet and outlet connections to avoid
the circulation of hot water within the
pipes. Do not remove the heat traps.
Connect the hot water supply
3
using 3/4 inch (19mm) NPT to
the hot water outlet. Follow
the same connection guidelines as for
the cold water supply.
Install insulation (or heat
4
tape) on the water pipes
especially if the indoor
installation area is subject to freezing
temperatures. Insulating the hot water
pipes can increase energy efficiency.
Double check to make sure
5
the hot and cold water pipes
are connected to the correct
hot and cold water fittings on the
water heater.
If needed, install (or adjust) a
6
Pressure Reducing Valve to
50-60 psi (345-414 kPa) and
install a Thermal Expansion Tank.
Figure 15 -
A Pressure Reducing Valve is
required if the plumbing system's water pressure
is above 80 psi (552 kPa).
Figure 16 -
The Thermal Expansion Tank should
be pressurized with air to match the incoming
water pressure.
Step 8:
Verify connections and
completely fill tank
To remove air from the tank and allow
the tank to fill completely with water,
follow these steps:
Remove the aerator at the
1
nearest hot water faucet. This
allows any debris in the tank
or plumbing system to be washed out.
Commercial Electric Water Heater Use and Care Guide • 17
Turn the cold water supply
2
back on.
Full-flow ball valve
Figure 17 -
Fully open the cold water supply
valve.
Open a hot water faucet and
3
allow the water to run until it
flows with a full stream.
Let the water run full stream
4
for three full minutes.
Close the hot water faucet
5
and replace the aerator.
Check inlet and outlet
6
connections and water pipes
for leaks. Dry all pipes so that
any drips or leaks will be apparent.
Repair any leaks. Almost all leaks occur
at connections and are not a tank leak.
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