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We reserve the right to make changes without any prior notice.
Translation from original instructions
Additional refrigerant charges R410A per linear metre of pipe
Diameter (mm)
Gas (kg/m)
Liquid (kg/m)
16
0,014
0,139
18
0,019
0,182
22
0,029
0,285
28
0,045
0,445
35
0,074
0,729
42
0,111
1,082
54
0,182
1,779
67
0,289
2,825
5.9 Topping up with oil
According to the length and diameter of the pipes made for remote exchanger connection, it may be necessary to increase
the oil charge. The oil level must be checked under nominal working conditions and with the unit at the lowest available
capacity for at least two hours, using the sight glass on the oil manifold.
So that the oil charge is sufficient, the level under these operating conditions must reach at least ¼ of the sight glass; if it
does not, more oil must be added.
The amount of additional oil needed can at most be 10% of the total oil charge present in the refrigerant circuit of the unit.
The amount of oil put in the refrigerant circuit at the factory is shown in the technical booklet for the unit. Alternatively, it is
possible to work this out by adding together the amount of oil in each compressor shown on the respective data plate. This
data plate also shows the type of oil.
Top up with the same type of oil or with perfectly equivalent oil.
If after topping up, with operation at minimum capacity, the oil has not reached the minimum level, check
that there are no oil traps along the remote pipes, that syphons are present in the riser sections and that
pipes of the correct diameter are used.
These operations must be carried out only by skilled staff with the necessary qualifications in accordance with current regu-
lations. If required, the manufacturer will be pleased to offer suggestions but in any case these will not change the installer's
exclusive responsibility for installing the system and carrying out the operations described above.
