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
Summary of Contents for VRV III REMQ72PBYD
Page 1: ...EDUS 391004 N AMERICAS AMERICAS Installation...
Page 24: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 23 1P218719...
Page 25: ...REFNET Pipe System EDUS391004 N 24 Installation of Outdoor Units 1P218720...
Page 26: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 25 1P218720...
Page 28: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 27 1P280278A...
Page 29: ...REFNET Pipe System EDUS391004 N 28 Installation of Outdoor Units 1P280278A...
Page 30: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 29 1P280279...
Page 33: ...REFNET Pipe System EDUS391004 N 32 Installation of Outdoor Units 1P218714...
Page 34: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 33 1P218714...
Page 35: ...REFNET Pipe System EDUS391004 N 34 Installation of Outdoor Units 1P218715...
Page 36: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 35 1P218715...
Page 38: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 37 3D071080...
Page 39: ...REFNET Pipe System EDUS391004 N 38 Installation of Outdoor Units 1P280510A...
Page 40: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 39 1P280510A...
Page 41: ...REFNET Pipe System EDUS391004 N 40 Installation of Outdoor Units 1P280511A...
Page 42: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 41 1P280511A...
Page 113: ...EDUS391004 N Field Setting Installation of Outdoor Units 113 2P281604A...
Page 114: ...Field Setting EDUS391004 N 114 Installation of Outdoor Units 2P281604A...
Page 115: ...EDUS391004 N Field Setting Installation of Outdoor Units 115 2P281604A...
Page 116: ...Field Setting EDUS391004 N 116 Installation of Outdoor Units 2P281604A...
Page 121: ...EDUS391004 N Field Setting Installation of Outdoor Units 121 2P281605A...
Page 122: ...Field Setting EDUS391004 N 122 Installation of Outdoor Units 2P281605A...
Page 124: ...Field Setting EDUS391004 N 124 Installation of Outdoor Units 2P281605A...
Page 129: ......