Flaring Work And Pipe Connection - Mitsubishi Electric MXZ-3A30NA Installation Manual

3. FLARING WORK AND PIPE CONNECTION

3-1. FLARING WORK
remove burrs in order to avoid to let burrs drop in the piping.
on pipe having completed burr removal. (Not possible to put them on
shown in the table. Select A mm from the table according to the tool
Pipe diameter Nut
17
22
26
29
3-2. PIPE CONNECTION
cause refrigerant leakage.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the same
manner applied for indoor unit.
• For tightening, use a torque wrench or spanner and use the same
tightening torque applied for indoor unit.
3-3. INSULATION AND TAPING
unit.
• When piping have to be arranged through above ceiling, closet or
for R410A for R22
0 to 0.5 1.0 to 1.5
-
-
Good
Copper
pipe
Fig. 1
Copper pipe
Burr
Spare reamer
Pipe cutter
Fig. 3
Smooth all
around
Copper pipe
Die
Flare nut
Fig. 5
Tightening torque
N•m
for R22
13.7 to 17.7
1.5 to 2.0
34.3 to 41.2
49.0 to 56.4
2.0 to 2.5
73.5 to 78.4
No good
Tilted Uneven Burred
Fig. 2
Flaring tool
Fig. 4
Inside is shin-
scratches.
Even length
all around
Fig. 6
kgf•cm ft·Ib
140 to 180 10 to 13
350 to 420 25 to 30
500 to 575 36 to 42
750 to 800 54 to 58
7