6
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:
Max. length Pipe in above figure
Single way total pipe length
300
L1+L2+ L3+ L4+ L5+ L6+ L7+L8+ L9+ L10+ L11+ L12+
L13+ L14+ L15
Single way max. pipe equivalent length
150 L1+ L3+ L5+ L7+ L14+ L13
Max. pipe length after 1st branch pipe
40 L7+L13+L14
Main pipe equivalent length
110 L5
Height difference between indoors
15 --
Height difference between outdoors
5 --
1.2.8 Allowable pipe length and height difference
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