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1-10
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,
fi
ttings, tubing and
coils until it is ready to connect suction or liquid line into
valves or
fi
ttings.
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
fl
are faces which
will cause gas leak.
Insert the
fl
are 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
fl
aring tool. See
Figure III.
Fix the pipe
fi
rmly on the swaging block. Match the centers
of both the swaging block and the
fl
aring punch, then
tighten the
fl
aring punch fully.
Piping Connection To The Units
Align the center of the piping and tighten the
fl
are nut
suf
fi
ciently with
fi
ngers. See Figure IV.
Finally, tighten the
fl
are nut with torque wrench until the
wrench clicks.
When tightening the
fl
are 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
Copper Tube
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
Spanar
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
Figure II
Figure III
Figure IV
1 EN-5WMJ-1211(0)Daikin.indd 10
1 EN-5WMJ-1211(0)Daikin.indd 10
1/12/12 1:44:38 PM
1/12/12 1:44:38 PM
Summary of Contents for FTYN25LV1B
Page 2: ......
Page 93: ...6 1 K A B C B 5 FTYN25 35LV1B 65 XEMA A MEP H I F E J G G L D B K M A F...
Page 96: ...6 4 H MAH E CTOPO HO 1 1 OFF PE PE EH E...
Page 97: ...6 5 R410A 1 1975 1 n 1 n 2 n 1 2 1 2 2 3 4 c 5 6 2...
Page 98: ...6 6 M4 x 12L e 30 50 n n 1 2 3 2 C D A A B C D 300 1000 300 500 B...
Page 99: ...6 7 2 A A 50 50 30 c y ox...
Page 106: ...6 14 N 1 E1 3 E3 2 E2 1 E4 3 E5 6 E8 4 E9 5 EEPROM EE 1 2 N 1 2 N 500 500 3 500 500...
Page 108: ...6 16 CTOPO HO 1 3 2 4 FRONT 1 2 2 3 4...
Page 109: ...6 17 CTOPO HO 40 C 1 2 2 3 c 1 40 104 F 2 3 1 40 104 F 2 CTOPO HO...
Page 110: ...6 18 1 3 3 4 2 3 4 5 6 2 30 C 86 F...
Page 129: ...MEMO LE M MO MITTEILUNG PROMEMORIA EL MEMOR NDUM NOT...
Page 132: ......
Page 135: ......
Page 136: ......
Page 137: ...3 1 3 4 2 3 4 5 6 30...
Page 138: ...1 2 2 3 40 1 2 3 1 40 2 40...
Page 139: ...3 1 4 2 1 2 2 3 4 1 3 1 FRONT...
Page 148: ...30 50 A A 50...
Page 149: ...30 50 M4 x 12L n n 1 2 3 2 C D A D C B A 500 300 1000 300 B...
Page 150: ...R410A 1975 GWP 1 GWP 1 1 n 2 n 2 1 n 1 2 2 3 4 5 6 1 2...
Page 151: ...OFF 1 1 ON OFF OFF...
Page 154: ...5 FTYN25 35LV1B A B C H I B F E J G G L D B K M A F OFF ON 65...
Page 155: ......