Hubbell Electric Heater Company HSE - Manual (Page 5)

5
SECTION I -
GENERAL DESCRIPTION AND CONSTRUCTION
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, 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 hot water connections. Water entering the cold
water inlet is deflected by means of a baffle within the tank. 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 and sizes.
CONTROL THERMOSTAT
The water heater is supplied with an immersion thermostatic switch that
is installed and wired at the factory. The immersion thermostat can be
adjusted through a range of 100° - 190° F and is adjustable with a flat tip
screwdriver. An optional low range (30° - 110° F) thermostat may be
supplied.