Table of Contents
Advertisement
Table 7.3: PIPING EXTENSION BEYOND FLARE FORM
Pipe
Tightening
torque
gauge
14.2-17.2 N.m
1/4
(144-176 kgf.cm)
32.7-39.9 N.m
3/8
(333-407 kgf.cm)
49.5-60.3 N.m
1/2
(504-616 kgf.cm)
61.8-75.4 N.m
5/8
(630-770 kgf.cm)
97.2-118.6 N.m
(990-1210 kgf.
3/4
cm)
109.5-133.7 N.m
(1117-1364 kgf.
7/8
cm)
4.
Remove PVC tape from ends of pipe when ready to
perform flaring work.
5.
Clamp flare form on the end of the pipe. The end
of the pipe must extend beyond the flare form.
6.
Place flaring tool onto the form.
7.
Turn the handle of the flaring tool clockwise until
the pipe is fully flared. Flare the pipe in accordance
with the dimensions shown in table 7-3.
8.
Remove the flaring tool and flare form, then inspect
the end of the pipe for cracks and even flaring.
CAUTION
Check to make sure there is no refrigerant leak after
completing the installation work. If there is a refrigerant
leak, ventilate the area immediately and evacuate
the system (refer to the Air Evacuation section of this
manual).
Page 18
Flare dimension (A)
Flare shape
(Unit: mm)
Min.
Max .
8.3
8.3
° ± 4
12.4
12.4
15.4
15.8
18.6
19
Fig. 7.6
22.9
23.3
27
27.3
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first, then
connect it to the outdoor unit. You should first connect the
low-pressure pipe, then the high-pressure pipe.
1.
When connecting the flare nuts, apply a thin coat
of refrigeration oil to the flared ends of the pipes.
2.
Align the center of the two pipes that you will
connect.
90
R0.4~0.8
A
Indoor unit tubing
3.
Tighten the flare nut as tightly as possible by hand.
4.
Using a spanner, grip the nut on the unit tubing.
5.
While firmly gripping the nut, use a torque wrench
to tighten the flare nut according to the torque
values in table 7-.3.
NOTE: Use both a spanner and a torque wrench when
connecting or disconnecting pipes to/from the unit.
Flare nut
Fig. 7.7
Fig. 7.8
Pipe
Advertisement
Table of Contents
