Hubbell Electric Heater Company HSE - Manual (Page 6)

6
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 unit, (in the HSE model the thermostat will disengage the operating coils in the
magnetic contactor). The high limit must be manually reset thereafter to restart the heater.
Manual Reset
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.
3-Phase Incoloy Sheathed Element
Single Phase Copper Sheathed Element