Olimpia splendid NEXYA S4 COMMERCIAL DUCT Serie Bedienungs- Und Installationsanleitung Seite 53

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CAUTION
IV. 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.
x The bending angle should not exceed 90°.
x Do not bend the pipe more than three times.
x 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.
x Be sure to use both a spanner and torque wrench together when connecting or disconnecting pipes to /from the unit.
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CAUTION
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Be sure to with insulating materials cover all the exposed parts of the flare pipe joints and refrigerant pipe on the
liquid-side and the gas-side. Ensure that there is no gap between them.
Incomplete insulation may cause water condensation.
90°
Outer diameter
6.35
9.52
12.7
15.9
19.1
Too large torque will harm the bell mouthing and too small will cause leakage. Please determine the
torque according to Table below.
After the connecting work is finished, be sure to check that there is no gas leak.
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Oblique Roughness Burr
Fig. 6-7
Flare dimension A (mm)
Min
8.3
12.0
15.4 15.8
18.6 19.0
22.9 23.3
Bend the pipe with thumb
min-radius 100mm
Fig. 6-8
Fig. 6-9
Fig. 6-10
A
Max
8.7
12.4
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