Kaisai KFAU-12HRG32X, Руководство пользователя и инструкция по установке

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Page 31
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Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight
seal.
1. After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe.
Make sure they are facing in the right
direction, because you can’t put them on
or change their direction after flaring.
Flare nut
Copper pipe
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.
Flare form
Pipe
2. Using a reamer or deburring tool, remove
all burrs from the cut section of the pipe.
Pipe
Reamer
Point down
Refrigerant piping
Connection
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.
PIPING EXTENSION BEYOND FLARE FORM
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.
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.
Indoor unit tubing Flare nut Pipe
3. Tighten the flare nut as tightly as possible
by hand.
4. Using a spanner, grip the nut on the unit
tubing.
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max .
Ø 6.35
R0.4~0.8
45
°±
2
90
°
±
4
A
Ø 9.52
Ø 12.7
Ø 16
Ø 19
Ø 22
67-101 N.m
(670-1010 kgf.cm)
23.2/0.91 23.7/0.93
85-110N.m
(850-1100 kgf.cm)
26.4/1.04 26.9/1.06
18-20 N.m
(180-200 kgf.cm)
8.4/0.33 8.7/0.34
32-39 N.m
(320-390 kgf.cm)
13.2/0.52 13.5/0.53
49-59 N.m
(490-590 kgf.cm)
16.2/0.64 16.5/0.65
57-71 N.m
(570-710 kgf.cm)
19.2/0.76 19.7/0.78