20 CSNX-XHE2
12.2-44.4
M07X40A16-00
7.15 Ambient pressure control
The ambient pressure control device compares the return pressure with the external pressure and compensates any variations by acting on
the outdoor air damper.
This way, the unit maintains the relevant ambient pressure desired by the user, who can choose between the overpressure, depression or
equal-pressure.
Room pressure calibration
1. check the doors and windows of the serviced room are closed
2. calibration must be carried out with unit all in recirculation
3. on display view the state: S28 Supply differential pressure
4. wait for the pressure value to stabilise and take note of the value
5. to maintain the room in neutral pressure, memorise the detected value in P071 SetPAmb
6. to maintain the room in overpressure, memorise a higher value respect to that detected
7. to maintain the room in depression, memorise a lower value
7.16 Fire alarm: configuration
The unit is able to manage the signal coming from a fire detection system or file control unit installed built-in, activating one of the logics
illustrated,which can be set by parameter.
Par 151 TypeFireMode
In the presence of alarm signal, the compressors are Always switched off; moreover, the remote on-off is disabled together with the switch
on/off control from keypad.
The unit cannot be used as smoke extractor.
Any fire detection devices built-in the unit must be considered as an auxiliary safety system, and, accordingly, must not be a replacement for
any fire detection devices in the room.