INS-75
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
5.3 Carry out connection of refrigerant pipings first on Indoor Unit, then on Outdoor Unit.
If a pipe bender is not available, please observe min. radius of curvature shown on Figure below.
For tightening of flared nut, use a spanner and a torque wrench to keep still the refrigerant connection.
Observe recommended tightening torques.
Excessive tightening may cause the breaking of flare, while an insufficient tightening is not able to assure
perfect tightness of flare.
At the end of tightening, there must be no leakages near connections points.
Caution:
Never bend pipings at right angle.
Bend the piping so as the bend is in the middle of the concerned straight section. Take care to keep a radius
of curvature as wide as possible.
Do not bend several times the same section of piping.
Oil (as it is shown by arrows in the Figure) the flare’s back and the flare nut’s inside with refrigerant synthetic
oil, and manually screw the flared nut 3-4 turns before carrying out final tightening.
In case of manual bending of
pipings, please observe min.
radius of curvature of 100mm.