Heat Recovery System - Daikin RWEYQ72PCYD Installation Manual

〈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.
Pattern 1
Piping between outside units
to indoor
unit
Pattern 2
to indoor
unit
Change to pattern 1 or pattern 2
Prohibited pattern
Downward
inclination
to indoor
unit
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.
Prohibited pattern
No trap has been installed in the gas piping.
to indoor unit
★
Oil may remain in the farthest outside unit.
Change to pattern 1 or pattern 2
English
3.
Oil remains in piping
Downward
inclination
8 in. (200 mm)
or more
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.
If 80 in. (2 m) or less
Piping between outside unit
80 in. (2 m)
to indoor
unit
If 80 in. (2 m) or more
80 in. (2 m)
or less
to indoor
unit
or less
Rising height:
8 in. (200 mm)
or more
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