Regulation Mode - Swegon GOLD RX Operation And Maintenance Instructions

6.4.1.3 Regulation mode

The regulation moden can be selected individually for the supply
air or the extract air respectively.
Airflow
Flow regulation involves operating the air handling unit to keep
the preset airflow constant. The speed of the fans is automati-
cally regulated to provide correct airflow even if the filters begin
to become clogged, if air diffusers become blocked, etc.
A constant airflow is advantageous, since the airflow is always at
the level preset 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 filters, causes the fans
to run at a higher speed. This causes higher power consumption
and may also cause discomfort to the occupants such as exces-
sive sound.
Duct pressure
The airflow automatically varies to provide constant pressure in
the ducting. This type of regulation is therefore also called VAV
Regulation (Variable Air Volume).
Pressure regulation is used when e.g. damper operations
increase the air volume in sections of the ventilation system.
The duct pressure is measured by an external in-duct pressure
sensor which is connected to the control unit's BUS communi-
cation. The set point required (separate for low speed and high
speed) is preset in Pa.
The function can be limited so that the fan speed will not exceed
the preset max. values.
Demand
The airflow required is regulated in response to 0-10 V input
signals from an external sensor, such as a carbon dioxide sensor,
connected to control unit terminals 18-19. The required set point
is set as a percentage of the input signal or in ppm.
The function can be limited so that the flow will not be higher or
lower than the preset max. and min. values respectively.
Slave
The flow is constantly regulated to the same value as 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
airflow.
The performance of the slave fan can be restricted if its maxi-
mum flow is set to a lower airflow rate.
It is not possible to control both fans as slaves. If you select one
fan to operate as a slave, you lose the option to select the other
fan as a slave.
Settings:
Value
Supply air
Extract air
34 www.swegon.com
Settings
Airflow
Duct pressure
Demand
Slave
Airflow
Duct pressure
Demand
Slave
Regulation mode
We reserve the right to alter specifications without notice.
GB.GOLDSKE.160901