ADJUSTMENT AND CALIBRATION OF THE SYSTEM
When the controller and related sensors have been
installed and connected to the mains, the system then
needs to be calibrated:
1) Adjusting the minimum and maximum speed for
the fans installed
Minimum operating speed
Set the minimum operating speed of the fans as
follows:
- Turn the system on by turning knob 1 to position
AUTOM. The green indicator light NET 6 turns on.
- Turn knob 2 to the left (anti-clockwise) until it comes
to a stop.
- Turn the knob of trimmer 4 MANUAL to the right
(clockwise) until it comes to a stop. The yellow
indicator light MANUAL 7 turns on.
- Turn the knob of the adjustment trimmer 3 MIN to
set the minimum desired speed for the fans.
Maximum operating speed
Set the maximum operating speed of the fans as
follows:
- Turn adjustment knob 2 to the right (clockwise) until
it comes to a stop.
- Turn the knob of the adjustment trimmer 5 MAX and
set the maximum desired speed for the fans.
- Turn the knob of trimmer 4 MANUAL to the left (anti-
clockwise) until it comes to a stop. The yellow
indicator light MANUAL 7 turns off.
The adjustment of the minimum and maximum speed
of the fans is completed.
Activating the automatic control system
- Turn knob 1 to position AUTOM.
- Turn knob 2 to the setting that corresponds to the
desired temperature difference, between the upper
and lower sensors.
- The initial recommended value is 3°C (third slot from
the left).
The settings enable the fans to operate continuously
between the minimum and maximum speed when the
temperature differential between the sensors exceeds
the set value of 3°C.
2) "Minimum limit" function
The configuration also foresees the possibility of
setting the operating mode that the automatic system
should enable every time the temperature difference
is reached (delta t°) .
• "Minimum limit" OFF
The fans run at the minimum speed set (this function
is useful when it is necessary to maintain the air
circulation).
• "Minimum limit" ON
When the required temperature is reached the fans
switch off.
By default, the system is configured with function
"Minimum limit" OFF (recommended).
Set "Minimum limit" ON as follows:
- Use a set of pliers to move the jumper from position
2-3 (right), as shown in Figure 1, to position 1-2 (left),
as shown in Figure 1.
Default configuration
1
2
3
Minimum limit OFF
1
2
3
Minimum limit ON
3) Adjustment Override
To override the automatic adjustment setting of the
temperature sensors to run the fans at maximum
speed, turn the left knob to CONTINUOUS.
4) Adjusting the fan speed
The controller can also be used to manually adjust the
speed of the fans and disable the temperature sensors.
Manual adjustment
- Turn the adjustment trimmer 4 MANUAL to the right
(clockwise). The yellow indicator light MANUAL 7
turns on.
- Turn the adjustment knob 2 to the desired fan speed
setting.
After
completing
the
transparent lid, ensure that the cover has snapped in
place. If necessary fix it in position using a locking
screw with a diameter 4 x 19 mm.
adjustment,
close
the
11