EVCO c-pro nano CHIL - Manual (Page 99)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 99
6.4 Operating Mode Control
The operating mode can take on the following values:
“MOdE” parameter Operating mode Description
0=CooL Chiller Summer operation
1=hEAt Heat pump (*) Winter operation
(*) Heat pump operation is only possible if the machine has been configured as chiller
+ heat pump (parameter PG00=2,4,6,8,10).
If the machine has only been configured as chiller (parameter PG00=1,3,5,7,9), the MOdE
parameter is no longer modifiable, thus the operating mode is fixed at 0 (i.e. CooL).
There are several procedures which enable configuration of the machine’s operating mode:
1) Via the MOdE parameter, accessible from the User menu.
Setting – Go to the parameter, then, pressing the ENTER key, modify the value using the UP
and DOWN keys. Confirm by pressing ENTER once more: the corresponding icon will
confirm that modification has been successful.
2) Via the command Summer/winter from digital input (this function is enabled by
parameters PH08 and Hd05, to determine the position of the associated digital input).
Setting – With open contact, the unit is set for winter operation, whereas with closed contact
it is set for summer operation. Commutation of the digital input switches the unit OFF,
changes its operating mode, and then switches the unit back ON.
3) Using a supervisory protocol (this function is enabled via parameter PH10).
Setting – Send from protocol the operating-mode change command: the corresponding
operating mode icon will confirm that modification has been successful.
4) Via the automatic Change-over function (this function is enabled via parameter PH06).
Setting – When the external temperature value exceeds the Summer Commutation Set Point
PC61, the unit commutates to summer operating mode. Conversely, when the external
temperature value falls below the Winter Commutation Set Point PC62, the unit commutates
to winter operating mode.
In order to enable this function, the external temperature probe (PH24) must also be
enabled.
Cooling Mode
Heating Mode
PC61 PC62
OFF
OFF
ON
ON
Ext. T.