CLIVET MSAT-XEE8.2 Manuel D'installation, D'utilisation Et D'entretien page 51

With the taps of the motor condenser closed, drain the system.
Using a gauge group, connect the vacuum pump on both connections of the taps, make sure that the solenoid valve or any intermediate taps
are open, proceed with the vacuum.
Stop the pump at a pressure of about 100 Pa and leave it under vacuum for a few hours; a slight initial rise of pressure is normal, followed by
stabilization.
If the pressure continues to rise, it means there are either small leaks or humidity is present. In the first case, repeat the operations in the
paragraph on checking for leaks in the manual for the refrigerant pipes.
In the second case, recharge the system with refrigerant gas up to 100KPa and re-create the vacuum as described above.
Once the pressure is permanently stable, move on to the next phase, which is charging.
4.8 Refrigerant charge
Check the type of refrigerant on the serial number label
The refrigerant charge must to be completed during the start-up phase, based on the type of indoor unit and on the pipe development.
With the system under vacuum, close the taps of the gauge group and disconnect the vacuum pump.
Connect the refrigerant gas tank, venting the air out of the hose for connection to the gauge group.
Open the tap of the liquid line.
Open the taps of the gauge group and let liquid-state refrigerant enter using an appropriate pump.
Once charging is complete, open the gas tap so that the unit is ready to be started.
4.9 Adding oil
Consider adding oil if the connection pipes are particularly long.
Check the oil level of the compressor in the indicator or in the Schrader plug.
4.10 Weight of refrigerant fluid
This table provides an estimate of that makes it possible to determine in advance how much gas will be needed.
The optimal refrigerant charge must be determined with the unit at normal operating power, in conditions that are near design conditions,
measuring and adjusting excessive heating or cooling.
The table does not take into account various thicknesses of pipes, it refers to a unit in operation (Tev = 5°C, Tcond = 45°C).
It is necessary to add to the indicated quantities the amounts required for the two units and for the gas pipes.
ext diameter mm 14
R410A *kg 1.1
Note:
* kg of R410A refrigerant for 10 meters of pipe.
To estimate the refrigerant contained in the tubes, consider the Liquid line only.
4.11 HGBP - Hot gas by pass
For details see:
4.11 HGBP - Hot gas by pass p. 11
4.12 KCX - Connection set
For details see:
4.12 KCX - Connection set p. 11
M09G60E14-04
16 18
1.5 2.0
MSAT-XEE 8.2-30.2
22 28
3.0 5.1
11