Kaysun KCIS-52 DR11, Руководство по установке

Страница: 21 / 40

21
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.
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.
Fig. 7.8
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.
Table 7.3: PIPING EXTENSION BEYOND FLARE
FORM
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max .
Ø 6.4
18-20N.m
(183-204kgf.cm)
8.4/0.33 8.7/0.34 90

4
Ø 9.5
25-26 N.m
(255-265 kgf.cm)
13.2/0.52 13.5/0.53
A
Ø 12.7
35-36 N.m
(357-367 kgf.cm)
16.2/0.64 16.5/0.65
R0.4~0.8
Ø 15.9
45-47 N.m
(459-480 kgf.cm)
19.2/0.76 19.7/0.78
Fig. 7.9
Ø 19.1
65-67 N.m
(663-683 kgf.cm)
23.2/0.91 23.7/0.93
Ø 22
75-85N.m
(765-867 kgf.cm)
26.4/1.04 26.9/1.06
8. Remove the flaring tool and flare form,
then inspect the end of the pipe for cracks
and even flaring.
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.
Indoor unit tubing Flare nut Pipe
Fig. 7.10
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.
CAUTION
•
Ensure to wrap insulation around the piping.
Direct contact with the bare piping may result
in burns or frostbite.
•
Make sure the pipe is properly connected.
Over tightening may damage the bell mouth
and under tightening may lead to leakage.

Fig. 7.11
R
ef
rig
er
an
t P
ip
in
g
C
on
n
ec
tion