Page 33
Refrigerant piping
Connection
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.
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.
5. While firmly gripping the nut, use a torque
wrench to tighten the flare nut according
to the torque values in above table.
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
65-67 N.m
(663-683 kgf.cm)
23.2/0.91
23.7/0.93
75-85N.m
(765-867 kgf.cm)
26.4/1.04
26.9/1.06
18-20 N.m
(183-204 kgf.cm)
8.4/0.33
8.7/0.34
25-26 N.m
(255-265 kgf.cm)
13.2/0.52
13.5/0.53
35-36 N.m
(357-367 kgf.cm)
16.2/0.64
16.5/0.65
45-47 N.m
(459-480 kgf.cm)
19.2/0.76
19.7/0.78
Put the copper nut
anti disassembly cap
after the connector is
locked.
Lock the connector
with a copper nut
anti disassembly
5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond
the flare form.
Flare form
Pipe
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.
Содержание KHHP-BI
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