Mitsubishi Electric City Multi PURY-HP72TKMU-A-H Installation Manual page 14

<C> Pipe connection example
The distributor on the low-pressure side must be placed in the outdoor unit that has a larger capacity index of the two, regardless of the relative positions of the
outdoor units or their addresses.
(If outdoor units that have the same capacity are used in combination, the distributor can be placed in either outdoor unit.)
If the distributor is placed in the outdoor unit that has a smaller capacity, refrigerant will not be properly distributed and compressor failure may result.
F
H
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G
I
J
K
F G
Twinning pipe (low-pressure side)
H
On-site piping (low-pressure connecting pipe: between outdoor units)
I
On-site piping (low-pressure main pipe: to BC controller)
J
On-site piping (high-pressure main pipe: to BC controller)
K
Straight run of pipe that is 500 mm [19-11/16 in] or more
Twinning pipe (high-pressure side)