68
COMPACT
COMPACT Control System
Fan Regulation (control)
The type of control can be selected individually for the
supply air fan or the extract air fan.
Flow Regulation (control)
Flow control 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; if air diffusers or
grilles become blocked, etc.
Constant airflow is advantageous, since the airflow is
always exactly as it has been preset from the beginning.
Demand Control
Demand control involves regulating the flow requirement
via external sensors, such as a carbon dioxide sensor that
is wired to the control unit. The setpoint, separate for low
speed mode and high speed mode, is preset as a percent-
age of the input signal.
Applies to COMPACT Unit & Top only
Slave Control
Slave control involves constantly regulating the flow to be
the same from the one fan as from the other fan. If one
fan is pressure-controlled or demand-controlled, the other
one can be controlled as a slave to generate the same air-
flow.
Applies to COMPACT Air & Heat only
Airing
Can be manually activated during a break if there are
many occupants in the room. The air handling unit fans
will then operate at max. speed during the preset period
(Factory Setting: 15 minutes).
Applies to COMPACT Unit & Top only
Pressure Regulation
Pressure control involves automatically varying the airflow
to provide constant pressure in the ducting. This type of
control is therefore also called VAV Regulation (Variable
Air Volume).
Pressure regulation is used, for example, when damper
functions regulate the airflow volume in sections of the
ventilation system.
The duct pressure is measured by an external pressure
sensor in the ductwork. The setpoint required (separate
for low speed and high speed) is adjusted in Pa.
Seasonally Compensated Airflow
Outdoor compensation of the airflow can be activated if
it is desired to reduce the airflow in the wintertime.
Seasonally compensated airflow is an energy-saving func-
tion that reduces the costs for operating the fans, reheat-
er and the ordinary heating system of the building.
This function cannot be combined with flow regulation or
pressure regulation. The function has no effect if the air-
flow is demand-controlled.
0%
-50%
-40%
-30%
-20%
-30 -20 -10 0 +10 +20
-10%
Y = Reduction of the airflow %
X = Outdoor air temperature °C
X1
X2
Y1
Outdoorcompensation according to the factory settings involves the
following:
Outdoor temperature of +10 °C (Breakpoint X2): Compensation
starts and gradually proceeds between 0-30 % down to an outdoor
air temperature of -20 °C.
Outdoor air temperature -20 °C (Breakpoint X1): Constant compensa-
tion takes place with 30 % (max. reduction Y1).
Flow/pressure Regulation to Min. Setpoint
If the heating load increases while the unit is operating
in the ERS regulation or supply air control mode, then
downspeed fan control for reducing the supply airflow
or both the supply air and extract airflow to the min. set
point will be the last step in the control sequence.
An adjustable reduction in temperature allows a lower
supply air temperature setpoint, before downspeed con-
trol is initiated.
Density-corrected Airflow
The density of the air is different at different tempera-
tures. This means that a specific volume of air changes at
various air densities.
The COMPACT automatically corrects this, so that correct
air volume is always obtained.
Zero Calibration
The zero value of the pressure sensor is checked and if
the value is not correct, a new calibration is carried out.
Switches in automatically every time the fans are stopped
for more than three minutes.
Flow/Pressure
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales