ECO
Installation Instructions and Use & Care Guide
29
9.9.
CREATE VACUUM
a)
During the whole procedure, employ, connections, vacuum pump and pressure gauges suitable for
fluid R134a.
b)
Employ a vacuum pump only to remove the air and humidity inside the piping.
c)
Never use the system coolant to purge the connection pipes.
d)
The valves must be completely shut during the vacuum process, in order to create vacuum only in
the piping.
Shut valves
e)
Create a vacuum with the vacuum pump plugged to the inlet of the 3-way pressure valve as
depicted, keeping the valves completely shut until there is a vacuum of 50 Pa (0.5mbar).
f)
Once the vacuum procedure is over, shut the vacuum pump valves. The vacuum pressure gauge
should indicate the same reading after the pump has stopped, ensuring the installation is in a
vacuum and ready for running the coolant.
g)
After concluding the vacuum procedure you must open the two valves so that the coolant may
circulate throughout the whole system; the installation keeps the vacuum steady and is ready for
running the coolant.
Open valves
IMPORTANT:
After concluding the vacuum, do not remove the hoses while the system is not completely
pressurized by the coolant.
We recommend the use of a thread sealant in every existing threaded coupling.
[A]
2-Way Valve
[B]
3-Way Valve
[A]
2-Way Valve
[B]
3-Way Valve
