Daikin RXYQ72PYDN Installation Manual page 10

13. High side equalizer accessory pipe (1)
14. L type accessory joint (1)
15. L type accessory joint (2)
16. Liquid side accessory pipe (2)
17. Low side equalizer accessory pipe (2)
18. Gas side accessory pipe (1)
19. High side equalizer accessory pipe (2)
20. Installation for mult: system
(Refer to figure 13-2)
1. When connected to the front
2. When connected at lateral side (bottom)
3. Remove the shutoff valve cover to connect.
4. Remove the knock hole on the bottom frame and route the
piping under the bottom frame.
5. Liquid pipe shutoff valve
6. Gas pipe shutoff valve
7. Brazing
8. Liquid side accessory pipe (1)
9. Gas side accessory pipe (1)
10. L type accessory joint (2)
11. Liquid side accessory pipe (2)
12. Gas side accessory pipe (1)
13. Installation for single unit system
NOTE
• Equalizer pipe is only for connection between outside units on multi
outside unit system.
That is not connect to indoor units.
• Make sure the onsite piping does not come into contact with other
piping or the bottom frame or side panels of the unit.
4.
Precautions when connecting piping between outside units
The Outside unit multi connection piping kit (sold separately) is
needed to connect piping between outside units in multi system.
Only proceed with piping work after considering the limitations on
installation listed here and in "5. Branching the refrigerant pip-
ing", always referring to the kit's installation manual.
(1) About outside unit multi connection piping kit
• Install the joint horizontally so that the attached warning label
faces strait up, and the tilt is within ±15°. (Refer to figure 16-1)
Do not install vertically. (Refer to figure 16-2)
• Maintain a straight portion of 19-5/8 in. or more until the split of
the joint without wrapping any onsite piping around this area.
Over 19-5/8 in. of straight area can be maintained by connect-
ing at least 4-3/4 in. 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 (4-3/4 in. length or more)
6. Straight part of 19-5/8 in. or more
7. C-arrow view
8. D-arrow view
6
(2) The piping between outside units must be installed level (Pattern
1) or with a rise (Pattern 2). Otherwise oil may pool in the pipes.
Pattern 1
Front connections
to indoor unit
Piping between outside units
Level
Side (bottom) connections
to indoor unit
Piping between outside units
Pattern 2
Front connections
to indoor unit
Rise
Side (bottom) connections
to indoor unit
Change to pattern 1 or pattern 2
Prohibited pattern
Front connections
Downward
Downward inclination
inclination
Side (bottom) connections
to indoor unit
Downward inclination
(3) To avoid the risk of oil detention in the stopping unit, always con-
nect the shutoff valve and the piping between outside units as
shown A or B in the figure below.
A
B
Front connections
Unit Unit
A B
Unit Unit
A B
Unit Unit
A B
Rise
Unit Unit
A B
Rise
Oil remains in piping
Unit Unit
to indoor
A B
unit
Unit Unit
A B
A
B
Side (bottom) connections
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