SYSVRF2 CASSETTE MINI IM

9
Fig.7-2
R0.4~0.8
45
°
±
2
90
°
±
4
A
●
●
Fasten the nut
Put the connection piping at the correct position, fasten the
nuts with your hand before using a wrench. (Refer to
Fig.7-3 )
Too large torque will harm the bell-mouthing and too small will
cause a leak. Determine the torque according to
Table.7-2.
Outside diameter
A(mm)
Max
8.7Φ6.4mm
Φ9.5mm
Φ12.7mm
Φ15.9mm
Φ19.1mm
12.4
15.8
19.0
23.3
8.3
12.0
15.4
18.6
22.9
Min
Table.7-1
Fig.7-3
●
●
●
●
●
●
The necessary filling amount of refrigerant
The refrigerant volume to be added is calculated according to
outdoor unit installation manual. Add refrigerant by measuring
it on a scale. L: The length of the pipe
Please record the quantity added and store it carefully for future
maintenance.
Expel the air with a vacuum pump (Refer to
Fig.7-4 ) (Please
refer to its manual for how to use the manifold valve)
Loosen and remove the maintenance nuts of stop valves A and
B, and connect the charge hose of the manifold valve with the
maintenance terminals of stop valve A. (Ensure that stop valves
A and B are both closed)
Connect the joint of the charge hose to the vacuum pump.
Completely open the Lo-lever of the manifold valve.
Turn on the vacuum pump. At the beginning of pumping, loosen
the maintenance terminal nut of stop valve B a little to check
whether air comes in. (The sound of the pump changes and
compound meter indicator goes below zero). Then fasten the
nut.
All the stop valves should be opened before testing. Each air
conditioner has two stop valves of different sizes on the side
of the outdoor unit, which operate as the Lo-stop value. (Refer
to
Fig.7-5 )
●
●
●
●
When the pumping has finished, completely close the Lo-lever
of the manifold valve and turn off the vacuum pump.
After pumping for at least 15 minutes, confirm that the
multimeter indicator is -1.0X105 Pa (-76 cmHg)
Loosen and remove the quadrangle cover on stop valves A and
B to open stop valve A and B completely. Then, fasten them.
Disassemble the charge hose from the repair-mouth of stop
valve A, and fasten the nut.
-76 cmHg
Lo-lever
Hi-lever
Charge hose
Charge hose
Vacuum pump
Lo-lever
Manifold valve
Multi-meter
Pressure meter
Flare nut
Stopper
Cap
Valve body
Valve stem
Fig.7-4
Fig.7-5
Table. 7-2
TorqueTubing size
14.2~17.2 N.m (144~176 kgf.cm)
32.7~39.9 N.m (333~407 kgf.cm)
49.5~60.3 N.m (504~616 kgf.cm)
61.8~75.4 N.m (630~770 kgf.cm)
97.2~118.6 N.m (990~1210 kgf.cm)
Φ6.4 mm
Φ9.5 mm
Φ12.7mm
Φ15.9mm
Φ19.1mm