Heat Transfer Phoenix, Installation & Operation Manual

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10
PREPARATION
tion of such listed safety device. The pressure rating of the valve must not exceed the listed work-
ing pressure of this appliance, and must be rated to the proper BTU/hr capacity of the water heater.
Do not, under any circumstances, thread a cap or plug into the relief valve! Explosion, serious injury
or death may result! Relief valve piping must be directed to the floor or to an open drain, but not
connected directly. There must be a 6" space between the outlet of relief valve piping and drain or
floor. Do not hook up to drain system directly without an air space. The relief valve must be period-
ically checked for proper operation.
J. POTABLE EXPANSION TANK
A potable hot water expansion tank is required to offset the water expansion as the water is heated.
In most city plumbing systems, the water meter has a no return or back flow device built into the
system to prevent back flowing of water back into city mains. Some local codes require back flow
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.
K. WATER PIPING
The domestic water connections must be installed in accordance to all local and national plumbing
codes, or any applicable standard which prevails. The inlet and outlet ports of the Phoenix are 1" on
55 gallon models. On the 80 and 119 gallon models, the inlet and outlet ports are 1 ½". On the cold
inlet, (bottom left), install a 1" brass tee on 55 gallon models, or a 1 ½" tee on 80 and 119 gallon mod-
els. On the run of the 1" brass tee, install with pipe sealant compound, a 1" brass drain cock or equiv-
alent. Into the branch of the 1" or a 1 ½" brass tee, install a copper male adapter to match your cop-
per plumbing system. For convenience, you may install a sweat shut off valve and a union in the cold
inlet piping to ease servicing in the future. If there is a back flow preventer, or any type of a no return
valve in the system, then you must install an additional tee here for a suitable potable hot water
expansion tank. In the hot outlet, (top left), 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.
L. AUXILIARY CONNECTIONS
The auxiliary connections are additional connections for an 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. The auxiliary connections are 1" on all
Phoenix Models. Never use dielectric unions or galvanized steel fittings. Use only copper or brass
fittings. Teflon Sealant must be used on all connections. The top port is the supply outlet and the
bottom port is the return inlet.
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CAUTION
The expansion tank must be suitable for hot potable water.
PART 3: PREPARE WATER HEATER LOCATION
(CONTINUED)
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CAUTION
NEVER USE DIELECTRIC UNIONS OR GALVANIZED STEEL FITTINGS ON ANY
DOMESTIC WATER CONNECTIONS OR AUXILIARY CONNECTIONS. USE ONLY
COPPER OR BRASS FITTINGS. TEFLON THREAD SEALANT MUST BE USED ON ALL
CONNECTIONS.