C0240111-04-05-GB
Direct valve
Fans
hysteresis 00.3 °C
delay 020 s
Selects the type of control for the freecooling valve, direct or reverse. Also sets
the hysteresis of each fan and the start/stop delay for each fan.
190
191
192
Defrost
m
p
Access mask to defrost submenu. Press "Up" or "Down" to scroll the other
masks and "Esc" to return to the submenu.
Standard Defrost
Config.
Sets 3 defrost types:
Standard, defrosting at fixed intervals,
Timer Tuning, defrosting at dynamic intervals,
Timer Auto Tuning, defrosting at dynamic intervals, also analysing
evaporation pressure values.
193
Defrost parameters:
Start 03.0 bar
Stop 14.0 bar
Defines the pressure setpoints for start and stop defrost.
194
195
Defrost parameters:
Delay 01800 s
Max. time 00300 s
Drip time 120 s
Sets defrost time parameters.
Delay: cumulative time measured before the defrost procedure starts.
Max. time: maximum duration of defrost procedure.
Drip time: duration of coil dripping
196
197
198
Timer tuning defrost
Ref. time 120 s
Lower band 030 s
Upper band 060 s
Sets certain timer tuning defrost parameters.
Nominal defrost reference time,
Lower band for increasing waiting time,
Upper band for decreasing waiting time.
199
200
Timer tuning defrost
maximum delay
modulation perc.
20
Sets the maximum current defrost delay variation percentage.
201
Maximum defrosts
per hour 3
Sets the maximum number of defrosts in an hour. If this value is exceeded, the
finned coil alarm appears.
202
Ext t.-Evap. t.
calc. interval. 300s
Max. diff. between
ext t.-evap. t.3.0°C
(only for auto tuning)
Maximum rate of change in the difference between external temperature and
evaporation temperature. If exceeded, it activates the defrost procedure after the
bypass time. The calculation is updated every "calculation interval".
203
204
Ext t.-evap. t.
difference threshold
for changing defrost
delay 15.0°C
(only for auto tuning)
Maximum difference between external temperature and evaporation temperature
for reducing defrost delay.
205
Threshold offset
Start var. 2.0°C
Reduction factor 5
(only for auto tuning)
Safety offset on maximum difference between external temperature and
evaporation temperature for reducing defrost delay.
Percentage of delay reduction by the Auto Tuning Defrost component.
206
207
Circuit start
bypass 120 s
Start variation
delay 600 s
(only for auto tuning)
Time during which defrost start is disabled by circuit start.
If the difference is greater than the set threshold, when the start defrost delay
expires, defrosting begins.
208
209
Minimum derived
evaporation
pressure
-00.1 bar/m
(solo per auto tuning)
Minimum derived evaporation pressure for reducing the defrost delay.
210
Forced defrosting
with low pressure
Enabled N
Threshold 1.0 bar
Minimum permitted evaporation pressure in heatpump. If the pressure falls below
this value, defrosting is forced.
211
212
Minimum operative
heatpump pressure
Separate 1.2 bar
restore 1.6 bar
Evaporation pressure values at which the circuit with more than one hermetic
compressor per circuit is "separated" to return the operating point within limits.
Evaporation pressure value at which compressor "separation" terminates.
213
214
Enable
Free Defrost N
Minimum external
pressure 04.0°C
Enables the Free-Defrost algorithm and sets the minimum external temperature
for operation.
215
216
Alarms
m
p
Access mask to alarms submenu. Press "Up" or "Down" to scroll the other
masks and "Esc" to return to the submenu.
High pressure from
transducers alarm:
Setpoint 28.0 bar
Diff. 07.0 bar
Sets the setpoint and differential for activating the high pressure from
transducers alarm.
217
218
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