Refrigerant Piping - MAXA 3500 W Manual Usuario/Instalador

• Open the stop values of the outdoor unit to make the refrigerant pipe connecting the indoor unit with the outdoor unit
in fluent flow.
• Check the leakage. Check all the joints with the leak detector or soap water.
• Cover the joints of the connecting pipe with the soundproof / insulating sheath (fittings), and bind it well with the tapes
to prevent leakage.
Be sure to with insulating materials cover all the exposed parts of the flare pipe joints and refrigerant
!
CAUTION pipe on the liquid-side and the gas-side. Ensure that there is no gap between them.
Incomplete insulation may cause water condensation.

6.6 Refrigerant piping

1. Flaring
a) Cut a pipe with a pipe cutter
b) Insert a flare nut into a pipe and flare the pipe.
2. Connect the indoor unit at first, then the outdoor unit.
Bend the tubing in proper way. Do not harm to them.
• The bending angle should not exceed 90°.
• Do not bend the pipe more than three times.
• When connecting the flare nut, coat the flare both inside and outside with either oil or ester oil and initially tighten by
hand 3 or 4 turns before tightening firmly.
• Be sure to use both a spanner and torque wrench together when connecting or disconnecting pipes to /from the unit.
Too large torque will harm the bell mouthing and too small will cause leakage. Please determine the
!
torque according to table below.
CAUTION
After the connecting work is finished, be sure to check that there is no gas leak.
Oblique Roughness Burr
90°
Flare dimension A(mm)
Outer diameter
Min
Ф6.35
8.3
Ф9.52
12.0
Ф12.7
15.4
Ф15.9
18.6
Ф19.1
22.9
Bend the pipe with thumb
min-radius 100mm
64
A
Fig. 6-7
Max
8.7
12.4
15.8
19.0
23.3
Fig. 6-8
Fig. 6-9
Fig. 6-10