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6. Provide the appliance with proper overload
protection in the branch circuit. It is suggested
that the electrician size the branch circuit at
125 percent of the heater ampere rating and
further increase wire size as necessary to
compensate for voltage drop in long runs.
Branch circuit voltage drop should not exceed
3% at the heater.
7. Voltage applied to the heater should not vary
more than +5% to -10% of the model and
rating plate marking for satisfactory operation.
8. A wiring diagram is provided with the water
heater for the electrician's use.
LOW WATER CUTOFF
This water heater is equipped with an electronic
low water cut-off installed at the factory. This low
water cut-off device uses a water level sensing
probe located above the heating element installed
in the highest point in the storage tank. If the
internal water level drops below this point, the
low water cut-off will shut down operation of the
heating elements. The electronic low water cut-off
has an LED located on its casing. This LED will
be illuminated and the control circuit will be
completed between the common and normally
open contacts on the relay unit when the sensing
probe is below the water level in the storage tank.
The operation of a low water cutoff should be
inspected every six months. For details refer to
electrical control circuit drawing attached to this
manuel.
STANDARD EQUIPMENT
Your commercial electric water heater is
equipped with the following as standard
equipment.
Low watt density immersion heating
elements with an stainless steel sheath.
Each heating element has 18 KW power
and two elements are grouped so the group
power is 36 KW. There are 4 groups of
elements making the total input power
144 KW.
Internal fusing of all elements in a
maximum of 48 amp increments provides
additional safety.
Electrostatic paint coated galvanized steel
outer jacket and electrical control panel are
provided.
Electrical control panel is provided with a
hinged door and key lock.
An AISI 304L stainless steel tank
constructed to ASME specifications and
provided with magnesium anode(s).
ASME rated temperature and pressure
relief valve provided by factory to ensure
safe heater operation.
Terminal block connections are installed
by the factory for safe easy wiring
connection.
Manual reset high water temperature limit
control.
Surface mounted mechanical thermostats
for each heater group. Max temperature
setting 162°F (72 °C)
3
year
limited
protection against failure of tanks due to
defects in material and workmanship in
commercial application.
Four groups of heating elements are
controlled by four regulating thermostats
as one thermostat for each group.
Time relays are provided to turn on the
heater groups in sequence with a user
defined time delay between each group.
Manual on-off switches for each heater
group with pilot lights.
warranty
provides
Page: 4 / 8
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