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English
1-11
Piping Works And Flaring Technique
Do not use contaminated or damaged copper tubing. If
any piping, evaporator or condenser had been exposed or
had been opened for 15 seconds or more, the system must
be vacuumed. Generally do not remove plastic, rubber
plugs and brass nuts from the valves, fittings, tubing and
coils until it is ready to connect suction or liquid line into
valves or fittings.
If any brazing work is required, ensure that nitrogen gas
is passed through coil and joints while the brazing work
is being done. This will eliminate soot formation on the
inside wall of copper tubings.
Cut the pipe stages by stages, advancing the blade of pipe
cutter slowly. Extra force and a deep cut will cause more
distortion of pipe and therefore extra burr. See Figure I.
Remove burrs from cut edges of the pipes with remover. See
Figure II. Hold the pipe on top position and burr remover
at lower position to prevent metal chips from entering the
pipe. This will avoid unevenness on the flare faces which
will cause gas leak.
Insert the flare nuts, mounted on the connection parts
of both the indoor unit and outdoor unit, into the copper
pipes.
The exact length of pipe protruding from the top surface
of the swaging block is determined by the flaring tool.
See Figure III.
Fix the pipe firmly on the swaging block. Match the centers
of both the swaging block and the flaring punch, then
tighten the flaring punch fully.
The refrigerant pipe connection are insulated by closed
cell polyurethane.
Piping Connection To The Units
Align the center of the piping and tighten the flare nut
sufficiently with fingers. See Figure IV.
Finally, tighten the flare nut with torque wrench until the
wrench clicks.
When tightening the flare nut with the torque wrench,
ensure that the tightening direction follows the arrow
indicated on the wrench.
The refrigerant pipe connection are insulated by closed
cell polyurethane.
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1/4t
Cutting Copper Tube
Copper Tube
Swaging Block
Remove Burr
Figure I
D
A
Pipe Size, mm (in)
Torque, Nm/(ft-lb)
6.35 (1/4")
18 (13.3)
9.52 (3/8")
42 (31.0)
12.70 (1/2")
55 (40.6)
15.88 (5/8")
65 (48.0)
19.05 (3/4")
78 (57.6)
Flared Tube
Flare Joint
Flare Nut
Indoor Piping
Torque Wrench
Spanner
Ø Tube, D
A (mm)
Inch
mm
Imperial
(Wing-nut Type)
Rigid
(Clutch Type)
1/4"
6.35
1.3
0.7
3/8"
9.52
1.6
1.0
1/2"
12.70
1.9
1.3
5/8"
15.88
2.2
1.7
3/4"
19.05
2.5
2.0
REFRIGERANT PIPING
Figure II
Figure III
Figure IV
1 IM-3WMYJ(R)-0816(0)-DAIKIN-EN-11 11
1 IM-3WMYJ(R)-0816(0)-DAIKIN-EN-11 11
12/22/16 10:23:28 AM
12/22/16 10:23:28 AM
Summary of Contents for FTXC25AV1B
Page 2: ......
Page 123: ...7 1 XEMA A MEP K FTXC C B A...
Page 126: ...7 4 H MAH E CTOPO HO 1 1 OFF H MAH E Xm2 13...
Page 128: ...2 K a B 25 35 K M4 x 12L e 75 50 500 1200 50 100 50 50 100 150 150 300 50 1200 1 2 3 7 6...
Page 129: ...1 2 30 3 16 50 60 H A B C D 300 1000 300 500 2 A A 7 7 C D pe c pe c A B H 2 H...
Page 130: ...50 50 75 c y ox 7 8...
Page 136: ...7 14 R32 13 25 OFN...
Page 137: ...7 15 C 3 30 760 760mmHg 3 2 4 o 3 760 760 3 3...
Page 140: ...7 18 FRONT K a B 2 1 4 2 5 4 3 K a CTOPO HO 1 3 2 4...
Page 141: ...7 19 2 1 2 c 3 40 104 F 1 2 3 1 2 40 104 F 1 2 1 2 CTOPO HO...
Page 142: ...7 20 3 1 3 4 2 3 4 5 6 2 30 C 86 F CTOPO HO 40 C...
Page 143: ...8 1 FTXC C B A...
Page 146: ...8 4 1 1 ON OFF OFF Xm2 13...
Page 149: ...16mm 50 60 H A B C D mm 300 1000 300 500 2 A 1 2 30mm 3 8 7 C D A B H 2 H...
Page 150: ...50 50 75 mm 8 8...
Page 156: ...R32 LFL 13 25 OFN OFN OFN OFN 8 14...
Page 157: ...8 15 3 30 760mmHg 760 mmHg 3 2 4 mm 3 760 mmHg 760mmHg 3 3...
Page 161: ...8 19 2 1 2 3 40 C 104 F 1 2 3 2 40 C 104 F 1 2 2...
Page 162: ...8 20 3 1 3 4 2 3 4 5 6 2 30 C 86 F 40 C...
Page 163: ...MEMO PROMEMORIA MITTEILUNG EL MEMOR NDUM LE M MO NOT...
Page 167: ......