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Atmospheric Gas
SECTION IV: INSTALLATION
WATER CONNECTIONS
CAUTION
This water heater incorporates fittings that contain a nonmetallic lining. DO NOT apply
heat to these fittings when making sweat connections to the heater. Sweat tubing to
an adapter before securing adapter to any fittings on water heaters.
ALL PIPING SHOULD CONFORM TO LOCAL CODES AND ORDINANCES. It is highly
recommended that unions and shut-off valves are installed at the potable water connections
to allow for isolation and/or movement during service. All piping should be adequately
insulated with an approved material to minimize heat loss.
POTABLE WATER CONNECTIONS
THE WATER HEATER MUST BE FILLED WITH WATER BEFORE LIGHTING THE
BURNER.
1) Close the main water supply valve before continuing with the installation. After the main
water supply is shut-off, relieve the water line pressure by opening a faucet. Once the pressure
has been relieved, close the faucet. The “Cold” and “Hot” potable water connections are
labeled on the water heater. Install a union and shut-off valve at both potable water
connections. All piping should be 3/4” diameter new copper or larger. A tempering valve or
anti-scald valve should be installed at the potable water outlet and used according to the
manufacturer’s specifications to prevent scalding.
2) If a backflow preventer is required in the cold water supply, a properly sized expansion tank
must be installed to control thermal expansion. Do not operate the water heater in a closed
system without installing a thermal expansion tank. Follow the expansion tank manufactur-
er’s recommendations when selecting a tank for your system.
3) Following installation of the water lines, open the main water supply valve and fill the
water heater. Open several hot water faucets to relieve air from the system. After water is
flowing through the faucets and the system is void of air, close the faucets and check for water
leaks in the system.
Note:
Do not try to heat hard water as this will drastically reduce heater life. Install a water
softener or other scale reducing water treatment system if the water heater is being installed in
a hard water area (water hardness higher than seven grains).
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