Acson 5MSY18BR Manual De Instalación página 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 A.
• Remove burrs from cut edges of the pipes with remover. See
Figure B. Hold the pipe on top position and burr removel 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 C.
• 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.
• The refrigerant pipe connection are insulated by closed cell
polyurethane.
Piping Connection To The Units
• Align the center of the piping and tighten the fl are nut suffi ciently
with fi ngers. See Figure D
• 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.
Pipe Size, mm (in)
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
15.88 (5/8")
19.05 (3/4")
Figure A
Figure B
Figure C
Inch
1/4"
3/8"
1/2"
5/8"
3/4"
Figure D
Torque, Nm / (ft-Ib)
18 (13.3)
42 (31.0)
55 (40.6)
65 (48.0)
78 (57.6)
1-8
Cutting Copper Tube
1/4t
Remove Burr
Copper Tube
D
Swaging Block
Ø Tube, D
mm Imperial (Wing-nut Type)
6.35 1.3
9.52 1.6
12.70 1.9
15.88 2.2
19.05 2.5
Flare Joint Flared Tube
Indoor Piping
Spanar
A (mm)
Rigid (Clutch Type)
0.7
1.0
1.3
1.7
2.0
Flare Nut
Torque Wrench