Installation 1
PACD011001G2 / PACD011004G3
20
Urban Multi Inverter “MX1” Series
Flare Connection
(a) Stiffened pipe must always be annealed at least once prior to the flaring work.
(b) A pipe cutter must be used to cut the pipe. (A large pipe cutter must be used where the pipe has a large
diameter. When cutting a pipe which is too big for the pipe cutter a metal saw may be used but care
must be taken to ensure that the debris from sawing does not get into the pipe.)
(c) Set the flaring tool to make sure the flare size remains within the prescribed limits.
(d) Coat the inner and outer surface of the flare with refrigerator oil (Ester or ether oil). (this ensures that the
flare nut passes smoothly, preventing the pipe from twisting.)
Do not use SUNISO-4GS oil.
Important points
1. Burrs should be carefully removed.
2. 2 spanners should be used to grip the pipe.
3. The flare nut must be inserted before starting the flaring operation.
4. The appropriate amount of torque should be used to tighten the flare nut.
5. Check that there is no superficial damage to the surface of the flare.
Nominal diameter
External diamenter of pipe d
Pipe widening dimensions A
3/8B
9.53
12.2~12.8
1/2B
12.7
15.6~16.2
5/8B
15.88
18.8~19.4
3/4B
19.05
23.1~23.7
Standard torques for tightening flare nut
±
10%
Size
Torque
(kgf-cm)
(N-cm)
1/4(6.4
φ
)
144~176
1420~1720
3/8(9.5
φ
)
333~407
3270~3990
1/2(12.7
φ
)
504~616
4950~6030
5/8(15.9
φ
)
630~770
6180~7540
3/4(19.1
φ
)
990~1210
9270~11860
