EN - 9
Board functions: descriptions (continued)
Free cooling
During free cooling, the dry cooler is run with a CIAT chiller. Both units are
controlled by the board.
The three-way valve can be controlled by the board provided the maximum
current is 3 A and the maximum voltage is 230 V. Refer to the chiller pump
curve to size the valve.
Link with CIAT
chiller
The following information is exchanged between the dry cooler (DC) or the
condenser (CO) and the chiller (CH):
CH > (DC / CO)
(DC / CO) > CH
•
Chiller on/off
•
DC or CO on/off
•
Setpoint (CO)
•
Free cooling
•
Pressure value (CO)
•
Fan stage fault
•
Sensor fault
BMS link
With the exception of the language, control type (local, remote),
communication mode and bus number, all the parameters can be accessed
in read and write modes.
P
Dry cooler (DC)
Chiller (CH)
CH only
DRY CHILLER
DC only
Selection
temperature
Process
return
temp.
Text
