Instruction manual
GROW
BASE EC
PRO
15
2.12
Intake fan turnoff night
Set the
minimum fan speed
of the intake
fan for a standard duct fan during the
night period
. If this value is undercut in
the controller’s operation, the intake fan
will be switched off to maintain the
negative pressure inside the grow room.
The minimal possible fan speed at 10%.
Additionally, “OFF” can be selected,
whereby the fresh air fan will always be
disabled during the daytime.
This value is only relevant for standard duct
fans. EC fans always turn off at 10%.
Ensure that the fan is still rotating at the set
minimum fan speed and the airflow is
sufficient for cooling the motor.
2.13
Deviation for reduced rpm
To avoid the fans running on full speed with
only a small exceedance of the desired
temperature, an
allowed deviation
can be
set.
The actual fan speed within this allowed
deviation depends on the minimum and
maximum fan speeds set on the previous
screens.
Some other manufacturers call this function
hysteresis.
2.14
Negative pressure in %
This setting has two different meanings
depending on whether a pressure sensor is
connected:
Without a pressure sensor connected:
With different fan speeds of the intake and
exhaust fans, a vacuum is maintained inside
the grow room, which avoids the escape of
odors from the grow room. With this value,
the amount of negative pressure can be set.
Furthermore, the intake and exhaust fans
can be balanced if different fans are used.
For example, if a value of 10% is set, this
means that the intake fan will always turn
10% less compared to the exhaust fan.
Please find additional information in section
8.
With a pressure sensor connected:
The setting limits the speed of the intake
fan compared to the exhaust fan. For
example, with a value of 0%, the intake fan
will at a maximum go as fast as the exhaust
fan. With this setting, having positive
pressure in case the pressure sensor is
calibrated inappropriately can be avoided.
2.15
Negative pressure in Pa
Set the desired negative pressure in Pa. This
setting is only relevant when a pressure
sensor is connected.
Pa = Pascal
One Pa is equivalent to the pressure
difference of approximately 7cm altitude in
the earth atmosphere.
Set negative
F
pressure
C
5Pa
BC
Set negative
F
pressure
C
10
A
BC
Deviation rpm
F
reduced
C
0.2
A
C
BC
Set intake off
F
night
C
m
30
A
BC
