Control Setup - "Exhaust Control Setup" Screen - Frick QUANTUM ACUair Operation Instructions Manual

The Exhaust Setpoints control the two exhaust fans on the
unit. The Exhaust Demand Value, which is displayed in
blue above Stage #1 Start Setpoint, indicates how much
air should be exhausted from the unit. The Exhaust
Demand Value is calculated by scaling the current Outside
Air Damper Position between the Minimum Outside Air
Position and the Cleanup Damper Position. These two
setpoints are found on the Damper Control Setup page.
When the unit is running if the Exhaust Demand Value
moves above the Stage #1 Start Setpoint, Exhaust Fan #1
is turned on. If the Exhaust Demand Value moves above
the Stage #2 Start Setpoint, Exhaust Fan #2 is turned on.
Likewise, when the Exhaust Demand Value drops below
the Stage #2 Start Setpoint, Exhaust Fan #2 is turned off.
And when the Exhaust Demand Value drops below the
Stage #1 Start Setpoint, Exhaust Fan #1 is turned off.
Below is an example of Exhaust Fan Control:
Setpoints -
Minimum Outside Air Damper Position = 25%
Cleanup Damper Position = 90%
FRICK QUANTUM CONTROL PANEL
ACUair OPERATION
CONTROL SETUP -
"EXHAUST CONTROL SETUP" SCREEN
Stage #1 Start
Stage #2 Start
The Exhaust Demand Value is the current Outside Air
Damper Position scaled between 15% (Minimum Outside
Air) and 90% (Cleanup Damper Position). It can be
calculated by using the following equation. Below the
equation are several possible Outside Air Damper
Positions, the corresponding Exhaust Demand Values and
the Exhaust Fans' status based on the above setpoints.
Exhaust Demand Value = 1000 * (Outside Air Damper
Position - Minimum Outside Air) / (Cleanup Damper
Position - Minimum Outside Air)
Outside Air Exhaust
Damper Demand
Position Values
0% 0%
25% 13%
50% 47%
75% 80%
100% 100%
S90-500 O
Page 17
= 35%
= 70%
Stage Stage
#1 #2
Off Off
Off Off
On Off
On On
On On