Daikin GYEQ20AN Service Manual page 55

SiAUY361411EA
7 Installing the Outdoor Unit
Performing piping work using the refrigerant branch kits (REFNET Joints and Headers)
Be sure to use refrigerant branch kits designed specifically for use with R410A.
Be sure to heat-insulate the branch kits in accordance with the supplied manual.
(1) REFNET Joints
(Gas side/fluid side branching pipes)
Local pipe
To outdoor unit
REFNET Joints should be installed so that the
b r a n c h e s a r e a r r a n g e d h o r i z o n t a l l y o r
vertically.
(Horizontal
A
* "Gas side" refers to both suction gas side and discharge gas side.
Device Overview
To following branching pipe
or indoor unit
Outlet (1)
Local pipe
Outlet (2)
Gas-side/liquid-side
branching pipe
(optional)
022620-00E
Within a range
of ±30˚ or vertical
axis)
(A-arrow view drawing)
(2) REFNET Headers
(Gas side branching pipe) (Fluid side branching
pipe)
Local pipe
To outdoor
unit
Gas-side branching pipe
(optional)
If the number of actually connected indoor
units is smaller than the maximum number of
indoor units that can be connected to the
branching pipe, connect a closed pipe to each
of the unnecessary branches.
022621-00E
B
REFNET Headers should be installed so that
the branches are arranged horizontally.
(Horizontal
axis)
(B-arrow view drawing)
If you use a locally procured pipe that does not
e x a c t l y m a t c h t h e b r a n c h s i z e , c u t t h e
connecting portion using a pipe cutter as
shown in the figure below.
Make sure that the gas side and fluid side kits
are for the R410A.
– 16 –
Installation Work Manual
Local pipe
Local pipe
Local pipe
To indoor
To indoor
To outdoor
unit
unit
unit
Liquid-side branching pipe
(optional)
022622-00E
Closed pipe
(included in kit)
Closed pipe
(included in kit)
022639-00E
022624-00E
022625-00X
0FGHP-EN0801 DGJ002
44