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ELECTRICAL CONNECTIONS
WARNING: ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH APPLICABLE
PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER ELECTRICAL CODES.
WARNING: DISCONNECT THE ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE
DISCONNECT SWITCH INDICATING THAT THE CIRCUIT IS BEING WORKED ON.
The electrical power supply requirement for the heater is 120 Volts, 60 Hz, 1 Phase. Minimum
conductor ampacity and maximum protective device should be rated 15 Amperes. The electrical power
for the gas booster water heater must be supplied independent of the dishwasher, whether the booster
is switched on and off with a manual switch (on the Stand Alone unit only) or by the dishwasher control
circuit (on the Dishwasher Activated unit only). Properly sized conduit and 14 AWG wire rated for at
least 90°C must be used for wiring connections.
Polarity must be observed for the heater to operate properly: Connect the hot Black wire to [ L1 ], the
White Neutral wire to [ N ], and the Green wire to the Ground lug. Consult wiring diagram accessed
by removing the left-front panel. Provide a separate fused circuit from the main electrical panel to the
heater. Also, provide a means of disconnecting the electrical supply within sight of the heater. Keep
wires away from vent.
When connecting a Dishwasher Activated gas booster water heater to the control panel on a
commercial dishwasher, use the connection points labeled BSTR1 and BSTR2 on the booster. Only
connect a Dishwasher Activated gas booster water heater (not a Stand Alone) to a dishwasher that has
been provided with a properly labeled connection point. Refer to the instruction manual for the
dishwasher (under Gas Booster Water Heater Option) to determine if this option is available and what
is the proper connection point on the dishwasher.
Model IB57 uses either a 24 Volt or 120 Volt inter-connect circuit for Dishwasher Activated boosters,
depending on the pilot circuit of the dishwasher model it is to be connected with. Models IB140, IB235,
and IB290 use only a 120 Volt inter-connect circuit for Dishwasher Activated boosters. A Dishwasher
Activated gas booster water heater should only be used with a dishwasher that is provided with the
capability of connecting the gas booster water heater as an accessory.
When the gas booster water heater is connected to the vent fan control switch, the vent fan is switched
on when the gas booster water heater is activated and off when the heater is off. Use connections VFC1
and VFC2 on the gas booster water heater if connecting to the vent fan control switch.
When the actual flow in the flue must be sensed to permit operation of the burner only when the vent
system is operating, use connections APS1 and APS2 on the gas booster water heater to connect to
an Air Pressure Switch. When making this connection, it is necessary to remove the jumper from
1TB-APS1 and 1TB-APS2. The air pressure switch is provided by others.