SCM Cuno 2 Aqua, Руководство пользователя

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EN
OEM Manual – CUBO
2
AQUA
Pag. 12-EN UMT/WG T BT Rev3.0 – 08/10/2021
Select “YES” – This will then open HPV
and equalizaztion valve according to the
settings in mask Bbd02
Set the wanted valves status during the
Vacuum
O = Open / C = Close
The status on the front screen will now
indicate “Unit OFF by vacuum”, in this
state the CDU cannot be set in ON.
The above step should be reversed prior
to charging the unit
7.2 Refrigerant & Oil Charging
7.2.1 Oil charge

All CUBO
2
AQUA are equipped by SCM with an additional pre-charged of
250ml of Oil (type PAG VG100) in the receiver. This info is highlighted with
a label applied in the switch panel door.

Take care to avoid moisture ingress. PAG oil is extremely hygrosopic!
Oil type approved is DAPHNE PZ100S or RENISO PAG100.
7.2.2 Procedure for additional oil refill
1. Close the evaporator electronic expansion valve by
raising the set point of the cooled space.
2. Wait for the CUBO to pump down and switch off the
compressors
3. Switch off the condensing unit (using ON/OFF
command on the display)
4. Close ball valve 3 in the CDU (90 on circuit diagram)
5. Fully open the evaporator electronic expansion valve
using the Carel magnet or using suitable manual
process for your EEV
6. Vent gas at valve 1 until pressure drops to 0 bar g
(check on display)
Internal check valve (138 on circuit diagram) will
prevent emptying the whole circuit
7. Connect a line from the oil can to valve 2 (liquid line
service port) and using a vacuum being drawn from
valve 1 (via the evaporator), pull the oil into the liquid
line.
8. When all the oil is in the system shut valve 2 (liquid
line service port) and continue to pull the system into
deep vacuum from valve 1 only.
9. When the vacuum is achieved charge vapour through
valve 1 up to 10 bar
10. Restore the automatic management of evaporator
electronic expansion valve and reset the set point if
adjusted.