General description, Construction, Tank – Hubbell Electric Heater Company A User Manual
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SECTION I -
GENERAL DESCRIPTION AND CONSTRUCTION
GENERAL DESCRIPTION
This book describes a packaged electric booster heater that is typically used to provide 180
°F sanitizing
rinse water. The complete assembly consists of the storage tank, immersion electric heating element(s),
thermostat, safety relief valve, safety high temperature cut out, magnetic contactor(s), and any other
required electrical operating control. Optional equipment may be supplied with your unit. Please
consult the product drawing for details specific to your assembly. The unit is factory assembled,
insulated, jacketed, wired, tested, and ready for electrical and plumbing service connections.
CONSTRUCTION
TANK
The storage tank is constructed of type 316L stainless steel for maximum tank longevity. The tank is
formed by all welded construction and is designed for a maximum allowable working pressure of 150
psi (300 psi TP).
TANK CONNECTIONS
The heater is supplied with separate connections for the cold/warm inlet and the hot water outlet. Water
entering the cold water inlet is deflected by means of a baffle within the tank. A ¾-inch FNPT
connection is provided for mounting a combination safety temperature and pressure relief valve. An
overflow line should be utilized from the relief valve outlet to a floor drain. See drawing for locations
and sizes.
HEATING ELEMENT
The water heater is supplied with an electric immersion heating element assembly(s), composed of
incoloy or copper sheathed elements that are brazed into a brass flange. Each assembly is fastened to a
corresponding tank flange using a gasket and four (4) 3/8-16 x 1-inch long hex head steel bolts and
nuts. See drawing for voltage and power ratings.