10
the range from 25 % up to 100 %.
SPEED CONTROL
STANDBY
LOW
MED
Setup and external
connection panel
Three-position mode switch
1 2 3 4 5 6 7 8 910
Exhaust fan speed control button
Supply fan speed control button
Mode button switch
Connection terminals for connection of external controls
Power supply indicator
Operation LED indicator
1 2 3 4 5 6 7 8 910
Connection of external controls.
Five external controls may be connected to the terminals 2 and 5. The unit changes to high speed mode once the connected
control unit is activated.
10%
20%
30%
40%
max
OFF
60
50
40
10
20
ON
OFF
1 2 3 4 5 6 7 8 910
+12V
Uout
GND
GND VAC
HIGH
MED
LOW
24V AC
HIGH
24V AC
+12V
com
Thermostat
Thermostat
Thermostat
Thermostat
External controls
External controls
External controls
External controls
Speed controller
Speed controller
Speed controller
Speed controller
0-10 V
0-10 V
0-10 V
0-10 V
Fire alarm panel
Fire alarm panel
Fire alarm panel
Fire alarm panel
1 2 3 4 5 6 7 8 910
External controls compatible with the unit:
1. Remote control panel (thermostat).
Remote control panel (thermostat) functions:
• Turning the unit on/off
• Speed
control
• Displaying room temperature
• Programming scheduled operation
2. CO
2
sensor.
Recommended for use in offi
ce buildings and public premises. When carbon dioxide concentration exceeds the set point, the unit
changes to the High Speed Mode.
3. Humidistat.
The humidistat is used for indoor humidity control. When indoor humidity increases above the set point, the unit switches to the
High Speed Mode and runs with the high speed until the humidity falls down below the set point. The humidity set point is adjustable.
4. Mechanical.
In case of the timer activation the unit changes into the High Speed Mode.
5. Switch.
As the switch is turned ON the unit changes into the High Speed Mode and reverts to the permanent Low Speed Mode when the
switch in turned OFF.
6. Speed controller 0-10 V.
Connect the speed controller to the external terminals 6, 7 and 8. The speed controller enables smooth fan speed control and
speed setting. The fan speed is directly proportional to the control voltage in the range of 20% up to 100%.
The control signal from the speed controller has the priority over all other controls, expect for the fi re control alarm panel.
7. Fire control alarm panel.
Connect the fi re control alarm panel to the external terminals 9 and 10. Once the dry contacts are closed the unit has an emergency
shutdown.
8. External control.
The terminals 35 and 36 for external equipment are located on the control panel. The terminals are connected to the contacts that
are closed during the unit activation and are closed during its deactivation.
This way the enabling signal for activation of the fan coil, the compressor and condensing unit, the electric actuator of the external
