Daikin VRV II RX5MY1 Installation Manual page 13

〈 〈 〈 〈 Cautions for installation of multiple outdoor units〉 〉 〉 〉
1.
The piping between the outdoor units must be routed level or
slightly upward to avoid the risk of oil detention to the piping side.
Pattern 1
to indoor unit
to indoor unit
Pattern 2
to indoor unit
to indoor unit
Change to pattern 1 or pattern 2
Prohibited pattern
to indoor unit
to indoor unit
2.
To avoid the risk of oil retention to the stopping unit side, always
connect the shutoff valve and the piping between outdoor units as
shown in the figure A or figure B.
A
B
English
Piping between outdoor units
Piping between outdoor units
Downward inclination
Downward inclination
Oil remains in piping
A
B
Prohibited pattern
to indoor unit
to indoor unit
Oil collects to the stopping outdoor unit.
Change to pattern 1 or pattern 2
Unit A Unit B
Unit C
to indoor unit
Oil collects to the outdoor unit C when the system stops.
Change as shown in the figure below.
to indoor unit
3.
If the piping length between the outdoor unit-connecting pipe kits
or between the outdoor units exceeds 2 m, create a rise of
200 mm or more in the gas line within a length of 2 m from the kit.
If 2 m or less
Piping between outdoor units
to indoor unit
If 2 m or more
Piping between
outdoor units
Rising height:
Piping between
200 mm or more
outdoor units
to indoor
2m or less
unit
Unit A Unit B
Unit C
to indoor unit
Rising height:
200 mm or more
to indoor unit
2m or less
Rising height:
200 mm or more
2m
2m or less
or more
Rising height:
200 mm or more
2m or less
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