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6
SECTION I - GENERAL INFORMATION
GENERAL DESCRIPTION
This book describes a packaged electric water heater that is a stationary, self-contained unit. The
complete assembly consists of the storage tank, immersion electric heating element(s), thermostat,
safety relief valve, safety high temperature cut out, 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, painted, wired, tested, and
ready for electrical and plumbing service connections.
CONSTRUCTION
TANK
The one-gallon storage tank is constructed of stainless steel and is designed for a maximum allowable
working pressure of 150 psi (300 psi TP).
TANK CONNECTIONS
The heater is supplied with separate ¼” MNPT cold water and hot water connections. 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.
See drawing for locations and sizes.
HEATING ELEMENT
The water heater is supplied with either a 1000 watt or a 450-watt electric immersion heating element
assembly, rated for 120 volts, and composed of a copper sheathed element that is brazed into a 1” NPT
brass plug.
TEMPERATURE HIGH LIMIT SWITCH
As a safety device, a surface mounted high temperature cut-off switch with manual reset, factory set at
190° F, is provided. In the event of an over-temperature condition, the thermostat will disengage the
power from the system. If this switch operates, do not attempt to reset. A dangerous situation is
indicated and a qualified service person should be called to find the source before the unit is operated
again.
Manual Reset