Daikin VRV III REMQ120PBTJ, Инженерные данные

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Installation EDUS391004-N
52 Installation of Outdoor Units
(2) The piping between outdoor units must be installed level
(Pattern 1) or with a rise (Pattern 2). Otherwise oil may pool in
the pipes.
(3) To avoid the risk of oil detention in the stopping unit, always
connect the shutoff valve and the piping between outdoor units
as shown A or B in the figure below.
(4) If the piping length between the outdoor units exceeds 80 in.,
create a rise of 8 in. or more in the gas piping under a length of
80 in. from the outdoor unit multi connection piping kit.
5.
Branching the refrigerant piping
Heed the restrictions below when installing the refrigerant
branching kit and read the installation instruction manual with the
kit.
(Improper installation could lead to malfunctioning or breakdown of
the outdoor unit.)
<REFNET joint>
Install the REFNET joint so it splits horizontally or vertically.
(Refer to figure 14)
1. Horizontal
2. A-arrow view
3. Horizontal surface
4. ±30° or less
5. Vertical
<REFNET header>
Install the REFNET header so it splits horizontally.
(Refer to figure 15)
1. Horizontal surface
2. B-arrow view
Pattern 1
Pattern 2
Prohibited pattern
Change to pattern 1 or pattern 2
to indoor unit
to indoor unit
to indoor unit
to indoor unit
Piping between outdoor units
to indoor unit
Piping between outdoor units
Downward inclination
Downward inclination
Oil remains in piping
Front connections
Side (bottom) connections
Front connections
Side (bottom) connections
Front connections
Side (bottom) connections
Level
Rise
Downward
inclination
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Rise
Rise
to indoor
unit
A
B
A
B
Front connections Side (bottom) connections
Prohibited pattern
Oil remains in the stopping outdoor unit.
Change to pattern 1 or pattern 2
Front connections
Side (bottom) connections
to indoor unit
to indoor unit
Oil remains in the unit A when system stops.
Change as shown in the figure below.
Rising height :
8 in. or more
Unit B
Unit B
Unit A
Unit A
Unit
A
Unit
B
Unit
B
Unit
A
Unit
A
Unit
A
Unit
B
Unit
B
Unit
A
Unit
A
Unit
B
Unit
B
Connect straightly
Oil remains in the unit B when system stops.
Change as shown in the figure below.
Connect straightly Put rising
to indoor unit
to indoor unit
If less than 80 in.
If 80 in. or more
Rising height :
8 in. or more
less than 80 in.
less than 80 in.
Unit
A
Unit
B
Unit
A
Unit
B
Gas pipe between
outdoor units
Gas pipe between
outdoor units
3P215731-10R