Water Piping; Auxiliary Connections; Filling The Heater - Westinghouse WGR050NG076 Installation Instructions Manual

preventers on all incoming water supplies. The hot water expansion tank must be listed for potable water use. The expansion tank
should be located on the cold inlet piping close to the water heater.
EXPANSION TANK AND MAKE-UP WATER
1. Ensure that the expansion tank is sized to correctly handle heater and system water volume and temperature.
Undersized expansion tanks cause system water to be lost from the relief valve, causing make-up water to be added. Eventual heater
failure can result due to excessive make-up water addition. SUCH FAILURE IS NOT COVERED BY WARRANTY.
2. The expansion tank must be located as shown in the Heater Piping Details, or following recognized design methods. See expansion
tank manufacturer's instructions for details.
The expansion tank must be suitable for hot potable water.
F. WATER PIPING
Never use dielectric unions or galvanized steel fittings on any domestic water or auxiliary connections. Use only copper or brass fittings.
Thread sealant must be used on all connections.
Do not apply heat to the water heater connections. If sweat connections are used, sweat tubing to the adapter before fitting adapter to
the water connections on the heater. Any heat applied to the water heater connections will permanently damage the dip tube and/or
heat traps. Damages due to improper installation practices ARE NOT covered by warranty.
The domestic water connections must be installed in accordance to all local and national plumbing codes, or any applicable standard
which prevails. The inlet (cold) and outlet (hot) ports are ¾" on all models.
It is recommended to install a sweat shut off valve and a union in the cold inlet piping and hot outlet to ease future servicing. If there is a
back flow preventer or any type of a no return valve in the system, you must install an additional tee here, suitable for a potable hot
water expansion tank.
In the hot outlet, install a suitable adapter to match the copper tubing of the plumbing system. A thermal trap or heat trap loop may be
installed here to provide additional energy savings and prevent the thermal siphoning of domestic hot water.
G. AUXILIARY CONNECTIONS
The auxiliary connections are additional connections for a recirculation connection, air handlers, plate exchangers, or other devices that
supply hot water. These connections must be installed in accordance with all local and national codes or any applicable standard that
prevails. Auxiliary connections are ¾" on all models. Never use dielectric unions or galvanized steel fittings. Use only copper or brass
fittings. Sealant must be used on all connections.
Never connect auxiliary connections to any system that uses glycol or other solutions formulated for hydronic systems. These auxiliary
connections are to be used only in a potable water system. Failure to follow this warning could result in serious injury or death.
H. FILLING THE HEATER
When filling the water heater, open a hot water tap to release air in the tank and piping. The tank must be full of water before the heater
is turned on. Failure to ensure the water heater is full before turning it on will result in damage to the water heater, and could result in
property damage, serious personal injury, or death. Such damages ARE NOT covered by water heater warranty.
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Make certain that the field installed drain valve is completely closed.
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Open the shut-off valve in the cold water supply line.
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Open the hot water faucets to allow air to vent from the heater and piping.
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Allow sufficient time for the heater to completely fill with water.
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WHL-001 REV. 9.3.14