30°C 70°C
The heat pumps check the working temperature (input or output), to which a safety thre-
shold is connected, and beyond which the compressor is switched off immediately and
automatically; this threshold is called FORCE-OFF.
Setting the safety threshold
Index - String
MIN
value
MAX
value
Parameter function
0.5°C 20°C
Temperature threshold above the force-off, which reactivates the start-up of the com-
pressor after the switching off for force-off.
Setting integral time
Index - String
MIN
value
MAX
value
Parameter function
0
secon-
ds
999
secon-
ds
The units possess an advanced logic for controlling the processed water temperature;
the complete check prevents the system arriving at a point of equilibrium at a higher or
lower temperature compared with the one set in the work setting. Remember that an
increase in the integration time weakens the effect of the integral control.
Setting derivation time
Index - String
MIN
value
MAX
value
Parameter function
0
secon-
ds
120
secon-
ds
Time within which the input water temperature is checked to estimate the load on the
system; if the band on the setting value is exceeded within this time, the unit will be acti-
vated.
Setting the anti-freeze threshold
Index - String
MIN
value
MAX
value
Parameter function
-50°C 20°C
In the units it is possible to set a threshold for the anti-freeze alarm; this value specifies
at what temperature the anti-freeze alarm is activated. Remember that, to modify the
anti-freeze threshold parameter, the corresponding dip-switch must be activated (see the
dip-switch configuration table).
Setting frost protection
Index - String
MIN
value
MAX
value
Parameter function
04
In the units, it is possible to set a safety control on the water output temperature; on the basis of the value assi-
gned to this parameter, the anti-freeze electric heater is managed as follows:
• value 0, anti-freeze electric heater absent;
• value 1, anti-freeze electric heater installed and working only with machine in heat or cool mode;
• value 2, anti-freeze electric heater installed and working also in standby, but switching on the pump;
• value 3, anti-freeze electric heater working in standby without the pump being activated;
• value 4, with external air temperature less than 3°C, the pump is activated for 2 minutes every 30, to moni-
tor the temperature of the water throughout the system.
j
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