INS-28
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
(4.3) Reinstall the air inlet grille on the decorative panel
m
Relocate the grille to the panel by side of clamps which allow the grille to sway.
m
Connect the connector of flap motor to the corresponding connector from Indoor Unit’s electric box.
m
To definitively fix the grille to the panel, carry out the procedure in reversed order as regards that
previously described for removing the grille itself.
m
At the end of procedure, always check if grille is well inserted in its location and if it cannot detach
accidentally during operation of Indoor Unit.
(5) Piping flaring
n
If piping’s lenght is too long or its end is damaged, it is necessary to cut it by the special pipe cutter,
before carrying out piping flaring.
(6) Refrigerant pipings
Oil flares’ back and indoor side of flare nuts by refrigerant synthetic oil. Align to pipe fittings the axis of
pipings to be connected and screw flare nuts on threaded pipe union of Indoor Unit. First of all, tighten
the connection manually as much as possible.
For definitive tightening, use a torque wrench and observe fastening torques indicated by Manufacturer
(see the Table below).
1. Pipes’ cutting
2. Deburring
3. Nuts’ insertion
4. Piping flaring
Flare tooling die
“A”
• Dimension “A”
Pipe diameter:
6.35 mm (1/4”)
9.52 mm (3/8”)
12.7 mm (1/2”)
“A” (mm):
0.7~1.3
1.0~1.6
1.0~1.6
Flare tool
Correct
Wrong
Lean
Crack
Damage of flare
Partial
Too outside
Examples of piping
flaring:
OK
NO
NO
NO
NO
NO
•Tighten the connection
definitively with a torque
wrench and a spanner:
Refrigerant pipings
Fork wrench
Flare nut
Torque wrench
Indoor Unit’s
pipe union
Fastening torque and pipe diameter (Ø")
29.4~34.3 N•m (3/8")
GAS side
LIQUID side
15.7~19.6 N•m (1/4")
49.0~53.9 N•m (1/2")
