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Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
3.3 Cooling unit (code ATCR)
The integrated cooling unit with EcoCooler (code ATCR) cooling recovery
is available as an optional extra in an Envistar Top unit with a rotary heat
exchanger. Cooling recovery means that the heat exchanger starts up when the
extract air/room temperature drops below the outdoor temperature and cooling
is required.
The unit has an electronic expansion valve and refrigerant R410a size 04-12 and
refrigerant R134a size 16-21.
Size
Compressor type
Refrigerant volume
CO2e (tonnes)
04
Rotary compressor
1.1 kg
2.30
06
Scroll compressor
1.7 kg
3.55
10
Scroll compressor
2.1 kg
4.38
12
Scroll compressor
2.38 kg
4.97
16
Piston compressor
5.0 kg
7.15
21
Piston compressor
5.2 kg
7.47
Compressor
Power control takes place with a speed-controlled compressor. When
increased cooling is required, the frequency inverter increases the speed of the
compressor.
Compressor protection
In the event of an alarm initiated by the frequency inverter or the safety circuit,
the compressor stops and an alarm indication is given. If the unit is equipped
with control equipment, the alarm can be read on the Climatix display.
In the event of an alarm, correct the fault and then reset the alarm. If the safety
circuit alarm trips repeatedly, an authorised refrigeration service company must
be called in.
