Installation manual

English 8
(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 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 18)
1. Horizontal
2. A-arrow view
3. Horizontal surface
4. ±30° or less
5. Ver tical
<REFNET header>
Install the REFNET header so it splits horizontally.
(Refer to figure 19)
1. Horizontal surface
2. B-arrow view
A
B
A
B
Front connection
Bottom connection
Oil remains in the stopping outdoor unit.
Rising height :
200 mm or more
1. Connect straightly 2. Put rising
Prohibited pattern
Front connection
Bottom connection
To indoor unit
Unit
A
Unit
A
Unit B
Unit
B
Outdoor unit Function unit
Outdoor unit
Function
unit
Outdoor unit
Function
unit
Unit
A
Unit B
Outdoor unit
Function
unit
Function
unit
To indoor unit
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Unit
A
Unit
B
Outdoor unit Function unit
Change to pattern 1 or pattern 2
Oil remains in the unit B
when system stops.
Oil remains in the unit A
when system stops.
Connect straightly.
Rising height : 200 mm or more
less than 2m
less than 2m
If less than 2m
To indoor unit
To indoor unit
Unit
A
Unit
A
Unit
B
Unit
B
If 2 m or more
Outdoor unit Function unit
Outdoor
unit
Function unit
Only gas piping
01_EN_3P201178-14S.fm Page 8 Friday, February 3, 2012 1:30 PM