EVCO c-pro CLIMA sistema Installer manual - Manual (Page 39)

C-PRO CLIMA SISTEMA INSTALLER MANUAL
Page 39
supervisor or switch-off is requested from key, the power plant goes into the relative OFF state. The
alarms that cause this state are:
- Delivery 1 probe alarm
- Delivery 2 probe alarm
The machine works normally again when the alarm has been reset.
5.11 Summer/winter functioning mode
The operational mode can assume the following values:
E/I keyboard parameter Description
S= SUMMER Summer functioning mode
W= WINTER Winter functioning mode
There are procedures that allow to set the c-pro CLIMA system functioning mode:
1) Via the parameter regarding S/W keyboard in the maintenance menu
Setting - Be positioned on the S/W keyboard parameter and, pressing the ENTER key,
modify the value using the UP and DOWN keys. Confirm by pressing ENTER again.
2) Via supervision protocol (function enabled by parameter S/W BMS)
Setting - Send the operational mode change control via relative state from protocol.
This control has priority with respect to the S/W control from keyboard
3) Using the Estate/Inverno da ingresso digitale (Summer/winter from digital input) control
(function enabled from S/W D. Input parameter.
Setting - With contact open the unit is in “winter” functioning mode, with contact closed in
“summer” functioning mode.
This control has priority with respect to the S/W control from supervision protocol
4) Using summer/winter automatic switch-over function (function enabled from S/W Auto
parameter)
Setting - Switch-over from summer to winter takes place when the external temperature
remains above the value established with the T.Ext S parameter for the time established by
the W/S delay parameter
Vice versa, switch-over from winter to summer takes place when the external temperature
remains below the value established with the T.ext W parameter for the time established by
the W/S delay parameter
This control has priority with respect to the S/W control from digital input
As well as selection of the operational mode, a digital output is linked to the summer/winter
functioning mode, which functions as follows:
Functioning mode State of the digital input
S= SUMMER Summer/Winter output ACTIVE
W= WINTER Summer/Winter output OFF
A typical application of the summer/winter relay is to automatically inform the chiller/heat pump
unit of the system functioning mode.
Note. For the two manual summer/winter change modes (procedures 1 and 2) it is recommended to
carry out the summer/winter change with the machine off.