GB.GOLDSK509.091101
We reserve the right to alter specifications without notice.
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INSTALLATION
FUNCTIONS
*FUNCTIONS*
TEMPERATURE
AIR FLOW/PRESSURE
FILTER
OPERATION
HEATING
COOLING
HUMIDITY
ReCO
2
IQnomic Plus
ALL YEAR COMFORT
CONTROL Optimize
* AIRFLOW/PRESSURE *
SA FAN REGULATION
EA FAN REGULATION
OUTDOOR TEMP COMP.
BOOSTING
SA DOWN REGULATION
SLAVE CONTROL
8.3 Flow/Pressure
Basic functions are set at INSTALLATION LEVEL and
the values are read and set at USER LEVEL.
8.3.1 Fan Regulation
The type of regulation used for the supply air fan and the
extract air fan respectively can be selected individually.
8.3.1.1 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.
8.3.1.2 Pressure Regulation
The airflow automatically varies to provide constant pres-
sure in the ducting. This type of regulation is also called
VAV regulation (Variable Air Volume).
Pressure regulation is used when damper operations
increase the air volume in parts of the ventilation system.
The duct pressure is measured by an external in-duct pres-
sure transducer which is wired to the BUS communication
of the control unit. The setpoint setting required (separate
for low speed and high speed) is entered in Pa.
The function can be limited so that the fan speed will not
exceed the preset max. permissible values.
8.3.1.3 Demand Control
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 30-33.
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.
8.3.1.4 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
selected by mistake, the extract air fan will be forced to
operate in the flow regulation mode.
Settings:
Value Detting
Fan regulation (SA/EA) Flow regulation
Pressure regulation
Demand control
Slave control
* AIRFLOW/PRESSURE *
SA FAN REGULATION
EA FAN REGULATION
OUTDOOR TEMP COMP.
BOOSTING
SA DOWN REGULATION
SLAVE CONTROL
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