Refrigerant
piping
Connection
Page 31
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1.
Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
2.
Using a reamer or deburring tool, remove all
burrs from the cut section of the pipe.
Pipe
Reamer
Point down
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.
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
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 .
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.
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
8. Remove the flaring tool and flare form,
then inspect the end of the pipe for cracks
and even flaring.
PIPING EXTENSION BEYOND FLARE FORM
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
Summary of Contents for FIP-400M
Page 39: ......
