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5
SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION
GENERAL DESCRIPTION
This manual describes a packaged electric water heater system designed to meet the requirements of ANSI
Z358.1-1998 for tepid water delivery to an emergency drench system. The complete assembly consists of the
storage tank, immersion electric heating element(s), thermostat(s), safety relief valve, safety high temperature
cut out, mixing valve, 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 standard storage tank is constructed of steel and internally lined with specially formulated Hydrastone
cement to a ½-inch minimum thickness. The tank is designed for a maximum allowable working pressure of 150
psi (300 psi TP).
TANK CONNECTIONS
The heater is supplied with separate cold water and tepid water connections. A 1-½ inch FNPT connection is
supplied for the cold water inlet. The cold water is deflected by means of a baffle within the tank. A 1-¼ inch
FNPT union connection is supplied at the mixing valve for tepid water. A ¾ inch FNPT connection is located on
the side of the heater 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. A ¾ inch GHT connection is supplied for
draining. See drawing for locations.
HEATING ELEMENT
The water heater is supplied with an
electric immersion heating element
assembly(s), composed of a copper
sheathed element(s) 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.
CONTROL THERMOSTAT
The water heater is supplied with an immersion thermostat factory
preset at 170°. The immersion thermostat can be adjusted through a
range of 100° - 180° F and is adjustable with a flat tip screwdriver.