Close Control Regulation Program
06MC0071@00B0110
01/10/2012
41
These screens are used to establish the settings for the condensing circuit:
-
on direct expansion units;
-
on twin cool or Energy Saving units, during the mechanical cooling
phase (with only the compressors on).
The controller keeps the water temperature in the closed circuit at a suitable
value for condensation, between the set point and the set point + a fixed
differential of 6°C.
The temperature is controlled by managing the operation of the remote
radiator fans (”Rad-Cooler”) connected to the indoor unit; control can be:
-
"On-Off": operation of the radiator fans is either on or off;
-
modulating ("Modul"): control of the 0-10 V signal sent via analogue
output Y1 to manage the radiator speed.
This screen is only available in the Twin-cool version and is used to manage
the settings for activating the changeover from mechanical cooling operation
to operation with chilled water.
To avoid continuously alternating between the two operating modes, there is
a minimum interval of 30 minutes between two consecutive activations of
the cold water valve.
If the high room temperature limit is exceeded (default: 30°C), the unit
automatically switches from 'CW' operation to 'DX' operation, signalling the
"High cold water temperature or valve fault" alarm.
T
Water closed circuit
Compressor
Chilled water activ. set
point (default = 7°C)
differential
fixed: 3°C
Unità TWIN COOL.
Chilled water valve
T
Water closed circuit
10 V
0 V
"Summer Temp."
(default = 28°C)
6°C
RAD COOLER MODULATION
100%
Analogic
Output
Fan Speed
T
Water closed circuit
ON
OFF
"Set Point"
(default = 28°C)
6°C
RAD COOLER ON/OFF – Unit DX, DX/S, TC.
Fan
