FläktGroup eQ PRIME 005, Commissioning, Page: 37 / 64

37 FläktGroup DC_9355GB 20180119_R0 We reserve the right to make changes without prior notice
Air handling unit
Air quality control
Air quality control is available with normal or inverted
function. With Normal Function, the fan setpoints are
increased proportionally when the carbon dioxide level
exceeds the set Setpoint. In this case, the carbon dioxide
sensor should be installed in the room or in the extract air.
Inverted function is used when a carbon monoxide sensor
has been installed in the outdoor air.
The fan setpoints are decreased proportionally if the
carbon monoxide level exceeds the set Setpoint. The
proportional adjustment of the setpoints is equal for both
fans.
MAIN INDEX
Ú
UNIT
Ú
AIR QUALITY CONTROL
This menu includes settings for Setpoint, choice of
Function and Controller. Note that the gain must be
negative (measured values higher than the setpoint value
must be negatively pressurised).
Air quality control
Controller
Function
Setpoint
0 %
Normal
800 ppm
Active mixing
Active mixing is a flow controlled recirculation.
The function is initialized with minimization of the dif-
ferential pressure over the mixing damper. This is done
with the extract air damper (optimal) and the outdoor
damper, depending on the pressure setup of the in-
stallation. After that, the mixing damper and the out-
door damper are controlled in parallel for mixing the air.
The exhaust fan is controlled to keep the flow balance in
the unit.
If full recirculation is allowed the exhaust air fan will
stopped and the mixing damper will be fully open.
0-calibration
For correct function of the active mixing, the unit must
make a 0-calibration when commissioning the unit.
To execute a 0-calibration set the Manual operation to Auto
and go to:
MAIN INDEX
Ú
UNIT
Ú
TEMP CONTROL
Ú
HREC DAMPER
Ú
SETTINGS
Ú
START
The air handling unit will first run in stable condition in max
speed and then in fan setpoint Step 1.
Hrec damper
Controller
Output signal
Recovery value
Crec damper
Controller
Output signal
Recovery value cooling
FreshAir
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Limit/settings
Min fresh air
Min flow fresh air
Controller, Q-min
Output signal
Q-min Out ,signal
Settings
0 %
100 %
100 %
0 %
100 %
100 %
0 %
4 %
14 1/s
0 %
0 %
0 %
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