Split Type Installation Manual
21
EN
12.2 Purging the Installation
Fig. 12.2 Purging the installation
Legend
1 Suction valve (gas)
2 Return valve (liquid)
3 Combined meter
4 Non-return joint
5 Pipes for coolant
6 Vacuum pump for coolant
• Connect a combined meter (faucets) to the three-way
valve in the suction hose.
• Connect a vacuum pump to the low-pressure end of
the combined meter.
• Ensure that the faucets are closed.
• Turn the vacuum pump on and open the vacuum valve,
the low valve on the combined meter and the gas
faucet.
• Ensure that the high valve is closed.
• Leave the vacuum pump functioning for approximately
15 minutes (depending on the size of the installation)
to carry out the vacuum.
• Check the needle on the low pressure manometer: it
should indicate -0.1 MPa (-76 cmHg).
Fig. 12.3 Low pressure manometer reading with the low valve open.
Preparation for Use 12
• Close the low valve on the combined meter, disconnect
the vacuum pump and close the vacuum valve.
• Check the manometer needle after approximately 10-
15 minutes have elapsed: the pressure should not rise.
If it does rise, there are leaks in the circuit: repair
them (check the joints, joins, the indoor and outdoor
parts and the technical service faucets).
Fig. 12.4 Low pressure manometer reading with the low valve
closed: checking for leaks.
Warning!
Danger of malfunction and leaks.
Ensure that the service valves are closed.
