EVCO c-pro nano CHIL - Manual (Page 111)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 111
6.8 Fan Management
The program is capable of managing up to 2 fans, i.e. one for each circuit. It is possible to associate
to each fan a safety digital input and an analogue output for ON/OFF switching.
6.8.1 Fan status
Each fan has an associated operating status in the status template of the main menu. A fan can take
on the following statuses:
- Disabled: The fan has not been configured, the status display shows “dIS”.
- On: The status display shows “On”.
- Waiting to switch ON: The fan is waiting for protection timings, before switching ON. The
status display shows “tOn”.
- Off: The status display shows “Off”.
- Waiting to switch OFF: The fan is waiting for protection timings, before switching OFF.
The status display shows “tOFF”.
- Alarm: The fan is in alarm status. The status displays shows “ALAr”.
- Manual: The fan is in manual operating mode. The status display shows “MAnU”.
In the Maintenance Operator menu, via parameters PM41 and PM42, it is possible to read the
number of operating hours of the two fans. To zero these hours when required, it is sufficient to
enter a “0” value, using the ENTER key.
6.8.2 Fan timings
There now follows a list of all timings connected with the management of fans.
Protection Timings
The purpose of these delays is that of protecting fans from the various start-up stresses to which
they are subjected and of avoiding simultaneous start-ups.
PF07 = Minimum time between start-ups of different fans. It determines the minimum time which
must elapse between the start-up of a fan and that of the next one.
PF08 = Minimum time between shutdowns of different fans. It determines the minimum time which
must elapse between the shutdown of a fan and that of the next one.
6.8.3 Thermal Protection Inputs
The program provides for the management of a single fan thermal protection for each of the fans
configured within the application.
In order to enable thermal safety switch alarms, in addition to setting the pertinent parameter, it is
also necessary to configure from the CoSt->HArd menu the positions to which the digital inputs
related to the various selected fans are to be connected. If no alarm is to be set, it is sufficient to set
the parameter to 0.