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OPERATION
The booster heater is designed to deliver 180°F water, up to the gallons per minute and gallons per
hour ratings specified in the table on page 4, depending on the incoming water temperature and
Booster Heater model and its input BTU/Hr.
Provided the necessary power, water, gas, and vent connections are completed, a S
TAND ALONE unit
is started by the activation of the On / Off Switch located on the front (Fig. 9). Provided the necessary
power, water, gas, and vent connections are completed, the D
ISHWASHER ACTIVATED unit will be On when
the dishwasher power switch is On. The Green indicator light is lit and the circulator pump turns on
when power to the booster heater is On. The blower motor will start after about 6 seconds if the
thermostat calls for heat.
Provided that the operating and safety controls including any vent switches are closed and that the
thermostat is calling for heat, the Amber indicator light is lit. ☛ The blower turns on for about 10
seconds, providing clean air in the combustion chamber. Then the gas valve opens and the hot surface
ignitor heats up for four seconds. With ignition, the flame sensor will detect that the burner flame has
been established. If the burner flame is not sensed within a few seconds, the circuit repeats the
process from ☛ for a total of three trial ignitions before the gas valve shuts off and requires reset.
To reset the ignition safety shutoff, momentarily turn the power switch off and then back on. If no power
switch is present, turn the dishwasher off for one minute and then turn the dishwasher back on. When
the water temperature exceeds the setting of the operating temperature control (thermostat board
assembly), the burner will shut off until the next call for heat. The operating temperature control
(thermostat board assembly) is factory set at 185°F.
On S
TAND ALONE units, the circulator pump will stay on as long as the On / Off Switch is on. On
D
ISHWASHER ACTIVATED units, pump will stay on as long as the dishwasher is on. The blower is on when
the thermostat is calling for heat and for 30 seconds after it is satisfied.
Fig. 9
PL-53172
Amber Indicator Light –
Green Indicator Light –
The Booster Heater has power.
On / Off Switch –
Present only on Stand Alone Units.
Flame
Observation
Port
Heat is being demanded.
NOTE:
Dishwasher Activated
units do not have an On/Off Switch
The booster heater starts when the
dishwasher power is on.