FloAire Demand Control Ventilation System - Manual (Page 13)

A0023662
May 2014 Rev.5
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6. If the controls include the Self Cleaning or CORE Protection Fire System option, a WASH button
will be displayed on the HMI. Push the button to start the wash cycle. Water will be sprayed in the
plenum and duct of the hood and surfactant will be injected at a predetermined frequency. The
wash cycle will stop when the wash timer expires or when the Stop Wash button is pressed.
Make sure Hood filters remain in place during the wash cycle.
NOTE: The hood self-cleaning function will occur automatically at predetermined intervals after the
system detects a hood use period (heated duct sensors). Refer to paragraph (10) to (13) under
miscellaneous configuration section(h) of this manual for adjustment information.
7. If the Proving Interlock Option is enabled, a calibration step is required at startup. Please refer to
the Fan Proving Interlock section below under Functionality for further details about this function.
To perform the calibration, refer to paragraph (e) under the Configuration section.
Sequence of Operation

Preparation Time mode:
Turn on the cooking appliances and allow
Temperature to rise. The exhaust fans will
automatically be energized in Preparation
Time mode at first (Supply off). The
factory set Prep activation point is 7.5
degrees above kitchen room temperature.
LIGHTS will automatically be turned on as
well. LIGHTS can be turned ON and OFF
manually by pressing the LIGHTS button.
Manual method: The FANS button can be
pressed to energize the exhaust fans in
Preparation Time mode (supply off).

Full Modulation:
As the cooking appliances heat up, the
system will go into modulation mode with
supply fan ON. The factory set activation
point for modulation is 10 degrees above
kitchen room temperature. This function
allows
the system to meet the
requirements of IMC 507.2.1.1, which
require exhaust fans to activate when
cooking is occurring. The fans take a few
seconds to come up to speed; this setting
is programmed into the panel for a soft
motor startup to prolong the fan motors.
The VFDs should all indicate 48Hz. Once
the cooking process begins, the VFDs will
begin to modulate typically between 48 Hz and 60 Hz based on the Duct temperature. This results in
a 20% reduction in airflow when operation is in low speed, which is equivalent to a 48% reduction in
electrical consumption by the fan motors.
For every exhaust fan, there are two possible factory settings for the temperature control: 450

degree rated hoods are programmed for a modulation range of 5 F, while the 600-700 degree rated
hoods are programmed for a modulation range of 45 F. All temperature ranges are adjustable as
needed for the application.
Manual Method: The PREP OFF button can be pressed to go into modulation mode and energize the
supply fan. VFDs for all fans will typically run at 48 Hz to start with and modulate based on
temperature from that point on.