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ALFA series
Model:
ALFA 12K WIFI, ALFA 18K WIFI, ALFA 24K WIFI
ALFA-installation manual-EN-R1 29.06.2020
6.
Recover the handle.
3.3.
C
ONNECTING THE PIPES
Screw the flare nuts to the outdoor unit coupling with the same
tightening procedures described for the indoor unit. To avoid
leakage, pay attention to the following points:
1.
Tighten the flare nuts using two wrenches. Pay attention
not to damage the pipes.
2.
If the tightening torque is not sufficient , there will
probably be some leakage. With excessive tightening
torque there will also be some leakage, as the flange could
be damaged.
3.
The surest system consists in tightening the connection by
using a fix wrench and a torque wrench:in this case use the
table on page 10.
3.4.
B
LEEDING
Air and humidity left inside the refrigerant circuit can cause
compressor malfunction. After having connected the indoor and
outdoor units, bleed the air and humidity from the refrigerant
circuit by using a vacuum pump.
1.
(1) Unscrew and remove the caps from the 2–way and 3–
way valves.
2.
(2) Unscrew and remove the cap from the service port.
3.
(3) Connect the cauum pump hose to the service port.
4.
(4) Operate the caum pump for 10-15 minutes until an
absolute vacuum of 10mm Hg has been reached.
5.
(5) With the vacuum pump still in operation, close the low
-pressure knob on the vacuum pump coupling. Stop the
vacuum pump.
6.
(6) Open the 2-way valve by 1/4 turn and then close it
after 10 seconds. Check all the joints for leaks using liquid
soap or an electronic leak device.
7.
(7) Turn the body of the 2-way and 3-way valves.
Disconnect the vacuum pump hose.
8.
(8) Replace and tighten all the caps on the valves.
