13
Preliminary indications
2.5 Length of refrigerant piping
In order to function correctly the system must take into
account:
– the total length of the pipes (1);
– the maximum dierence in height between the
outdoor and indoor units (2) (3);
– the maximum lengths after the first Y-joint (4);
– the maximum dierence in height between the
indoor units (5).
5
4
Installation with Outdoor units at the top
Fig. 7
5
1
4
Installation with Outdoor units at the bottom
Fig. 8
Ref. Pipe length Value
1 Total length of pipes 100m
2
Maximum dierence in height
between the outdoor unit (located
at the top) and the indoor units
30m
3
Maximum dierence in height
between the outdoor unit (located
at the bottom) and the indoor units
20m
4 Maximum length after first Y-joint. 20m
5
Maximum dierence in height
between indoor units
8m