GB.COMPACTAHSK.210520
Registered design. The company reserves the right to make design changes without prior notice.
www.swegon.com 25
INSTALLATION
FUNCTIONS
*FUNCTIONS*
TEMPERATURE
AIR FLOW/PRESSURE
FILTER
OPERATION
HEATING
COOLING
IN/OUTPUTS
IQnomic Plus
ALL YEAR COMFORT
9.3 Flow/Pressure
Basic functions are set at INSTALLATION LEVEL and
the values are read and set at USER LEVEL.
9.3.1 Fan Regulation
The type of regulation used for the supply air fan and the
extract air fan respectively can be selected individually.
9.3.1.1 Flow Regulation
Flow regulation involves operating the air handling unit
to keep the preset airflow constant. The speed of the fans
is automatically regulated to provide correct airflow even
if the filters begin to become clogged, air devices are
blocked, etc.
Constant airflow is advantageous, since the airflow always
is exactly as it was from the beginning.
It should however be noted that everything that increases
the pressure drop in the ventilation system, such as the
blocking of air devices and dust accumulating in the fil-
ters, causes the fans to run at a higher speed. This causes
higher power consumption and may also cause discomfort
in the form of noise.
9.3.1.2 Demand Regulation (Control)
The flow demand is regulated via a 0-10 V input signal
from an external sensor, such as a carbon dioxide sensor
that is wired to control unit terminals 35(-) and 37(+).
Required setpoint (separate for low speed and high speed)
is set as a percentage of the input signal.
The function can be limited so that the flow will not be
higher or lower than the preset max. and min. permissible
values respectively.
9.3.1.3 Slave Control
The flow is constantly regulated to be the same from the
one fan as from the other fan. If one fan is pressure-con-
trolled or demand-controlled, the other one can be con-
trolled as a slave to generate the same airflow.
The performance of the fan controlled as a slave can be
restricted if its maximum flow is set to a lower airflow rate.
Both fans cannot be controlled as slaves. If both are select-
ed by mistake, the extract air fan will be forced to operate
in the flow regulation mode.
* AIRFLOW/PRESSURE *
SA FAN REGULATION
EA FAN REGULATION
CLEAN AIR CONTROL
OUTDOOR TEMP COMP.
SA DOWN REGULATION
Settings:
Value
Setting
Fan regulation (SA/EA)
Flow regulation
Demand control
Slave control
* AIRFLOW/PRESSURE *
SA FAN REGULATION
EA FAN REGULATION
CLEAN AIR CONTROL
OUTDOOR TEMP COMP.
SA DOWN REGULATION
