Installation / Operation Instruction Manual

6
Water Connections
NOTE: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE
MAIN WATER SUPPLY VALVE.
After shutting the main w ater supply valve, open a faucet to relieve the
water line pressure to prevent any w ater from leaking out of the pipes
while making the w ater connections to the water heater. After the
pressure has been relieved, close the faucet. The cold water inlet line
connects to the inlet nipple at the base of the water heater. The hot
water outlet line connects to the nipple on top of the w ater heater. The
fittings at the cold water inlet and hot water outlet are dielectric
waterw ay fittings w ith tapered male threads. Make the proper plumbing
connections betw een the w ater heater and the plumbing system in the
structure. Install a shut-off valve in the cold water supply line.
If this w ater heater is installed in a closed w ater supply system, such as
one having a back-flow preventer in the cold w ater supply, provisions
shall be made to control thermal expansion. DO NOT operate this water
heater in a closed system without provisions for controlling thermal
expansion. Your water supplier or local plumbing inspector should be
contacted on how to control this situation.
After installation of the water lines, open the main w ater supply valve
and fill the water heater. While the water heater is filling, open several
hot w ater faucets to allow air to escape from the water system. After a
steady stream of water flows from the faucets, close them and check all
water connections for possible leaks. NEVER OPERATE THE WATER
HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER.
CAUTION
If sweat fittings are to be used, DO NOT apply heat to the nipples on
top of the water heater. Sweat the tubing to the adapter bef ore
fitting the adapter to the water connections. It is imperative that heat
is not applied to the nipples containing a plastic liner.