EN
Cod. 3QE46210 - Rev. 01 - 10/2020
RUBINO M
37
2.12 VACUUM OPERATION (OBLIGATORY)
Air and humidity in the cooling circuit impair the operation of the unit with effects such as:
• Increased pressure.
• Reduced efficiency.
• Formation of ice on the capillary and subsequent blockage of the same.
• Corrosion in the circuit.
This is why a vacuum must be created in the connection pipes and indoor unit.Proceed in the following way:
• Connect the previously described charging pipe to the vacuum pump.
• Turn on the relative knob on the monometric unit to allow the pump to access the cooling circuit.
• Wait until the pressure level measured by the pressure gauge is around 3 mm Hg (400 Pa)
• As soon as the required vacuum value is reached, shut the connection cock and stop the vacuum pump.
Perform the vacuum test for all connection lines (i.u.a, i.u.b, i.u.c).
fig. 24 -
