Daikin GYEQ20AN, Руководство по обслуживанию

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Installation Work Manual SiAUY361411EA
41 Device Overview
0FGHP-EN0801 DGJ002
– 13 –
7 Installing the Outdoor Unit
Refrigerant piping work and connection
This section provides instructions to follow when performing refrigerant piping work.
z Only use copper pipes that have clean inner surfaces (e.g. free of moisture and dust).
When you cut a refrigerant pipe, be sure to use a pipe cutter. Before connecting the pipes, flush them with
nitrogen gas to blow out any dust inside. Avoid using a saw, grindstone, or any other tool that generates a
large amount of chips. Connecting pipes with moisture or dust remaining on their inner surfaces could
possibly result in serious damage.
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Through
hole
022613-00E
Good
No good
When passing the
piping through a
wall, be sure to
put a cap on the
pipe end or plastic
tape around it.
Put a cap on or plastic
tape around it.
022614-00E
Do not put the
piping directly
on the ground.
Put a cap on or plastic
tape around it.
Good
No good
Rubber
band
Cap or
vinyl bag
Rainwater
gets inside
the piping
022615-00E
No good Good
z
Fit flare nuts on pipe ends before expanding the pipes. To connect
each flare nut, follow these steps: 1) Lubricate the outer
circumference of the flare with refrigerating machine oil equivalent
to an oil used for the outdoor unit's compressor; 2) Manually screw
in the flare nut by turning it 3 or 4 turns; 3) Tighten the flare nut
with the specified torque.
z When you bend a pipe, make the bending radius as large as
possible. Do not repeatedly bend a pipe.
z When you cut a pipe, use a copper cutter and cut the pipe with as
small a notch as possible so that no burr occurs inside the pipe.
z When you chamfer the inner surface of a pipe after cutting it, use a
dedicated tool and deburr the cut surface.
z When you flare the cut end, use a dedicated tool and flare it into
one of the sizes listed in the table on the right.
z The stop valve that belongs to the outdoor unit and the flange
gasket of the external filter must not be installed until braze
welding is complete.
Flare inner
surface
022616-01E
Flare shape
Do not use a flare connection
without O materials.
022617-00E
Pipe size
(outside diameter)
Flare dimension A (mm)
ij
8.7 to 9.1
ij 12.8 to 13.2
ij 16.2 to 16.6
ij 19.3 to 19.7