INS-95
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
• Always apply refrigerant oil on flares’ back and on flared nut’s inner side, before tightening flared nuts. This will
assure seal of connections.
• Always use a pipe bender for bending pipings, and take care that radius of cuvature is always wide enough in
order not to block pipings.
• Carry out the connection first on Gas side and then on Liquid side, as Gas side piping has a wider diameter and
requires wider service spaces.
Caution:
Always centre the piping on Outdoor Unit’s piping connection, before screwing flared nut by hand
and carrying out definitive tightening. Ignoring this precaution may cause damages to threads of flared nuts
and piping connections; flares may also be deformed and refrigerant leakages may occur.
Please use a spanner to keep still the Outdoor Unit’s piping connection and prevent it from being twisted. Use
a torque wrench for tightening flared nuts. Always observe the recommended tightening torque.
Piping diameter (Ø)
Tightening torque
Liquid side: 6.35mm (1/4”)
Gas side: 9.52mm (3/8”)
15.7 ~ 19.6 N•m
29.4 ~ 34.3 N•m
Gas side: 12.7mm (1/2”)
49.0 ~ 53.9 N•m
• Cut pipings at your desired length, by using the special pipe cutter.
• At the end of operation, please remove burr from pipings’ ends by using the deburring tool.
• Insert flared nut on piping before starting piping flaring.
Correct
Wrong
Lean
Crack
Damage of flare
Partial
Too outside
Examples of piping
flaring:
OK
NO
NO
NO
NO
NO
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
1.0~1.8
Flare tool
Note (for Indoor Units 356 X, 536 X only):
For piping connection of each Indoor Unit 356 X and 536 X to the Outdoor, it is needed to use a diameter adapter
Ø9.52 (3/8”) → Ø12.7 (1/2”) on Outdoor Unit’s Gas side.
According to Outdoor Unit’s Model, 1, 2, 3 or 4 diameter adapters are provided (see the Figure below). If
necessary, each adapter must be connected (Flare connection) to Outdoor Unit’s service valve on one side, and
on the other side (always by Flare connection) to Gas side piping directed to Indoor Unit.
Gas side, Outdoor Unit
[(Ø9.52 (3/8")]
To Gas side piping, Indoor Unit
[(Ø12.7mm (1/2")], except for 206 X, 266 X
4.7.16 Pipings’ cutting and flaring
4.7.17 Connections of refrigerant pipings