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The following items are available as extra cost
options.
• Electronic low water cut-off prevents
energizing of the heater when it is not filled
with water.
• Pilot lights – Monitor on-off cycle of
contactors.
• Manual limiting switches with indicating
lights to permit heater kW input to be
manually limited as desired.
• Temperature and pressure gauges are
available installed flush with the jacket to
monitor heater performance.
• Electronic step controller modulates power
in-put and balances load to demand.
• Safety door interlock prevents opening of
access door while heater is energized.
• Shunt trip disconnect provides power
disconnect upon a control sensed
malfunction.
• Alarm bell provides an audible alarm to
warn of various control failures.
• Time clock to control off-on cycles of the
heater as programmed by the owner or
electric utility requirements.
• Low water pressure switch.
• High water pressure switch.
A main power terminal block is provided for field
connection of the branch power supply to the
electric water heater. All internal power circuits
to the immersion heating elements are connected
to the load side of the main terminal block. The
line side of the terminal block has individual lug
type connections properly sized for the
recommended copper field wire size.
11
OPTIONAL EQUIPMENT
COMPONENTS AND CONTROLS
POWER CIRCUIT FUSE BLOCK
IMMERSION
THERMOSTAT
CONTACTOR
(IF EQUIPPED)
LOW WATER
CUTOFF
(IF EQUIPPED)
CONTROL
CIRCUIT
FUSE BLOCK
CONTROL
CIRCUIT
FUSE BLOCK
TRANSFORMER
TERMINAL BLOCK
GROUND LUG
FIG. 12 Electrical Panel Component Location
Drawing
TERMINAL BLOCK
LOAD
LINE
FIG. 13 Main Power Terminal Block