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English
8
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Cautions for installation of multiple outdoor units
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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.
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.
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.
Pattern 1
Pattern 2
Prohibited pattern
Change to pattern 1 or pattern 2
to indoor unit
Piping between outdoor units
Piping between outdoor units
to indoor unit
to indoor unit
to indoor unit
to indoor unit
to indoor unit
Downward inclination
Downward inclination
Oil remains in piping
A
B
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
Unit C
Unit A
Unit B
to indoor unit
Change as shown in the figure below.
to indoor unit
to indoor unit
to indoor unit
Oil collects to the outdoor unit C when the system stops.
Rising height:
200 mm or more
to indoor
unit
If 2 m or less
If 2 m or more
Piping between outdoor units
Piping between
outdoor units
Piping between
outdoor units
to indoor unit
2m or less
2m or less
2m
or more
Rising height:
200 mm or more
Rising height:
200 mm or more
Rising height:
200 mm or more
2m or less
2m or less
01_3P114261-9L-EN.fm Page 8 Thursday, August 28, 2003 3:33 PM