English
13
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Cautions for installation of multiple outside units
〉
1.
The piping between the outside units must be routed level or slightly
upward to avoid the risk of oil detention to the piping side.
2.
The gas piping (both discharge and suction gas piping in case of the
heat recovery system) after branched, install without fail a trap of 8
in. or more using the piping included in the piping kit for connecting
the outside unit. Otherwise, the refrigerant may stay within the pip-
ing, causing any damage to the outside unit.
3.
If the piping length between the outside unit connection piping kit or
between the outside units exceeds 80 in. (2m), create a rise of 8 in.
(200mm) or more in the gas piping within a length of 80 in. (2m) from
the kit.
Pattern 1
Pattern 2
Prohibited pattern
to indoor
unit
to indoor
unit
to indoor
unit
Downward
inclination
Downward
inclination
Change to pattern 1 or pattern 2
Oil remains in piping
Piping between outside units
8 in. (200 mm)
or more
No trap has been installed in the gas piping.
★
Oil may remain in the farthest outside unit.
Change to pattern 1 or pattern 2
to indoor unit
Prohibited pattern
to indoor
unit
to indoor
unit
If 80 in. (2 m) or less
If 80 in. (2 m) or more
80 in. (2 m)
or less
80 in. (2 m)
or less
Rising height:
8 in. (200 mm)
or more
Piping between outside unit
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