Separation Tube - Fujitsu AUYG07LVLA Design & Technical Manual

3-2.

SEPARATION TUBE

PIPE CONNECTION
Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper,
the flare nut cannot be tighten smoothly. If the flare nut is forced to turn, the threads will be
damaged.
Do not remove the flare nut from the indoor unit pipe until immediately before connecting the
connection pipe.
Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order to tighten the
flare nut correctly.
Tighten the flare nuts with a torque wrench using the specified tightening method. Otherwise,
the flare nuts could break after a prolonged period, causing refrigerant to leak and generate a
hazardous gas if the refrigerant comes into contact with a flame.
hen the are nut is tightened proper b
spanner then tighten with a tor ue wrench.
Flare nut
[mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
Type of separation tube
Liquid pipe
Positioning of separation tube
If it is placed horizontally, keep it within ± 15°. Otherwise, it will not separate the refrigerant evenly,
causing a reduction in performance.
Place the separation tube in a horizontal position as much as possible. Only place the separation
tube as shown below during unavoidable circumstances.
Horizontal
A
±15°
OK
A: Outdoor unit or Separation tube
B: Branch box or Separation tube
CAUTION
our hand ho d the bod side coup ing with a separate
ee the tab e be ow or the are nut tightening tor ues.
Tightening torque
[N·m]
16 to 18
32 to 42
49 to 61
63 to 75
90 to 110
Name and shape
CAUTION
A
B
Vertical
or
Horizontal
line
B
OK OK
- (06 - 30) -
Gas pipe
B
Not good
A
Not good
6. SYSTEM DESIGN