Instruction manual 1.0.0 rev1 en
GROW
BASE
18
Set the maximum fan speed of the exhaust
fans during the “CO
₂
period”. This fan
speed will never be exceeded.
Set the desired temperature for CO
₂
mode.
When this temperature is exceeded, the
fan speeds will be increased until this value
is reached.
Set the minimum airflow of the exhaust fan
during the “CO
₂
period”. This fan speed will
never* be undercut.
*during pressure, sensor calibration is in process,
all fans are turned off.
The minimum fan speed is 10%.
Additionally, “OFF” can be selected. This
means that the intake fan will be switched
off as long as the measured temperature is
below the desired temperature.
Ensure that the fan is still rotating at the set
minimum fan speed and the airflow is
sufficient for cooling the motor. This
applies for standard duct fans (AC) only.
Set the maximum fan speed of the intake
fan during the CO
₂
period. The specified
value will never be exceeded.
Ventilation
In this section the minimum and maximum fan speeds and the negative pressure can be set.
Separate values for day and night are available.
The factory settings are a good starting point for many setups. Considerations for the
optimum settings are:
•
Reasonable noise of the ventilation system
•
Required air exchange to reach the desired temperature
•
Recommended operating range of your (carbon) filters
•
The balance between intake and exhaust fans regarding the size/flow. This is relevant
for the negative pressure.
Principle of operation:
The fan speed of the exhaust fans is controlled in order to maintain the desired room
temperature. Optionally one or more intake fans can be used in order to forward additional air
into the room. The fan speed of the intake fans is controlled in order to maintain the desired
negative pressure.
If the intake fans run faster at a certain speed of the exhaust fans, the negative pressure
decreases. If the intake fan runs slower, the negative pressure increases.
Without a pressure sensor
PRES
SENSE
, the speed difference between exhaust and intake fans
is given by the setting “negative pressure %”.
Example: Current exhaust fan speed: 50%
Negative pressure %: 10%
Set exhaust
F
CO2 MAX
C
15
A
BC
Set exhaust
F
CO2 MIN
C
OFF
BC
Set intake
F
CO2 MAX
C
OFF
BC
