English
6
•
Maintain a straight portion of 500 mm or more until the split of
the joint without wrapping any onsite piping around this area.
Over 500 mm of straight area can be maintained by connect-
ing at least 120 mm of onsite pipe (straight) to the joint.
(Refer to figure 16-3)
(Refer to figure 16)
1.
Warning label
2.
Horizontal surface
3.
±15° or less
4.
Ground
5.
Onsite pipe (120mm length or more)
6.
Straight part of 500mm or more
7.
C-arrow view
8.
D-arrow view
(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 2 m,
create a rise of 200 mm or more in the suction gas and HP/
LP gas piping under a length of 2 m from the outdoor unit
multi connection piping kit.
5.
Branching the refrigerant piping
Heed the restrictions below when installing the refrigerant branch-
ing 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
C
Unit
A
Unit
B
Unit
C
Unit
A
Unit
B
Unit
C
Unit
A
Unit
B
Unit
C
Unit
A
Unit
B
Unit
C
Unit
A
Unit
B
Unit
C
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 B
when system stops.
Unit A
Change as shown
in the figure below.
Rising height :
200 mm or more
Unit B
Unit C
Unit B
Unit C
Unit A
Unit A
Unit
A
Unit
B
Unit
C
Unit
B
Unit
C
Unit
A
Unit
A
Unit
B
Unit
A
Unit
B
Unit
C
Unit
C
Unit
A
Unit
B
Unit
A
Unit
B
Unit
C
Unit
C
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 2m
If 2 m or more
Rising height :
200 mm or more
Rising height :
200 mm or more
less than 2m
less than 2m
less than 2m
Unit
A
Unit
B
Unit
C
Unit
A
Unit
B
Unit
C
Suction gas pipe and
HP/LP gas pipe
between outdoor units
Suction gas pipe and
HP/LP gas pipe
between outdoor units
Summary of Contents for VRV III REYQ18PY1
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