80
2. Applicable range
When the pipe between the outdoor unit and its furthest indoor unit is longer than 90m, the specication of master
pipe (Gas pipe/ Liquid pipe) between outdoor unit and the rst Y joint should be upgraded for one level. For more
details, please refer to "Outdoor pipe selection table"
When the pipe between the rst Y joint and its furthest indoor unit is longer than 40m,
(1) The specication of the master pipe ( Gas pipe/ Liquid pipe) between the rst Y joint and its furthest indoor unit
should be upgraded for one level.
(2) The distance between the furthest indoor unit and the nearest one ≤ 40m.
(1) The piping connecting outdoor unit must be placed horizontally or in accordance with the installation of a certain
angle (level angle less than 15 degrees), connected with a concave not allowed.
(2) All piping cannot connect the outdoor unit is higher than the height of the machine outlet (valve interface part).
3. Pipe length between outdoors
Item Model All outdoors Pipe in above gure
Single way total pipe length 1000 m (correspond length) L1+L2+L3……+L22
Single way pipe length Max. 165/190 (correspond length) L1+L3+ L5+L6+L7+L8+L9+L10
Main pipe beween outdoor to 1st branch Max.130 (correspond length) L5
Height difference between
indoor and outdoor
Outdoor is upper Max. 40m H3
Outdoor is lower Max. 50m H3
Height difference between outdoors (in the
same system)
Within 0.5 m (better be horizontal) H1
Max. pipe length from 1st branch pipe to indoor Max. 40m L6+L7+L8+L9+L10
Height difference between indoors Max. 15m H2
Max.pipe length between indoors and
thenearest branch pipe
Max. 30m
When outdoor is only one,
Single way max. pipe length = L5+L6+L7+L8+L9+L10≤190m
Single way total pipe length = L5+L6……+L22
Proper installation Wrong installation
The lubricating oil will accumulate to the lowest outdoor
unit
Proper installation Proper installation
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