220
3. Allowable piping length and height difference between indoor and outdoor
2) Installation below is not allowed (compressor oil will ow into the lowest outdoor).
Outdoor 1 Outdoor 2 Outdoor 3
When the outdoor unit is installed above the
indoor units, the maximum height should be 50m
Max. drop:5m
Outdoor 1
Outdoor 1
Outdoor 2 Outdoor 3
L2
L3
L4
L5
L6
L8
A
B
C
D
E
F
L9
L10
L11
L12
L14
L15
L13
L7
L1
Max. drop:15m
When the outdoor unit is installed below
the indoor units, the maximum height
should be 40m
Should
be less
than 2m
Over
200mm
Over
200mm
Should
be less
than 2m
When the distance between outdoors is over 2m, the oil trap must be set
(upright projecting pipe, 200mm high), as the gure:
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