Control Setup - "Damper Control Setpoint" Screen - Frick QUANTUM ACUair Operation Instructions Manual

S90-500 O
Page 18
The Damper Setpoints control the Outside Air Dampers
and the Economizer function of the unit. The Minimum
Outside Air Damper Position sets the minimum position
that the Outside Air Dampers can be closed to. The
Cleanup Damper Position is the position of the Outside Air
Dampers during Cleanup.
In Process Mode if the Outside Air Temperature drops low
enough to assist with cooling in the room, the Economizer
Setpoints will open the Outside Air Dampers to allow cold
air from the outside to flow into the room. When
Economizer is enabled, the Outside Air Dampers are
controlled by the Damper PID Command, which tries to
move the Return Air Temperature toward the Economizer
Switchover Setpoint. The Economizer Proportional Band,
Dead Band and Integration Time adjust the speed and
precision of this PID control.
FRICK QUANTUM CONTROL PANEL
ACUair OPERATION
CONTROL SETUP -
"DAMPER CONTROL SETPOINT" SCREEN
The Economizer flag, displayed above the Economizer
Setpoints, remains disabled while the Outside Air
Temperature is greater than the Economizer Switchover
Setpoint. When the Outside Air Temperature drops below
the Economizer Switchover Setpoint, the Economizer flag
is enabled and the Damper PID Command begins to
control the Outside Air Dampers. The Damper PID
Command continues to modulate the Outside Air Dampers
until the Outside Air Temperature rises above the
Economizer Switchover Setpoint plus the Economizer
Differential Setpoint. At this point, the Economizer flag is
again disabled.
In Cleanup Mode while the Heating Purge Timer is on, the
Outside Air Dampers remain at the Minimum Outside Air
Damper Position. As soon as the Heating Purge Timer
has timed out, the Outside Air Dampers are moved to the
Cleanup Damper Position where they remain for the
duration of the Cleanup cycle.