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6. Limitation values on pipe installation
3U19FS2ERA 3U24GS2ERA
Item Unit Description Standard Maximum
A,B,C liquid pipe mm Size of the liquid side connection pipe φ6.35 /
A,B,C Gas pipe mm Size of the gas side connection pipe φ9.52 /
L1 (one way) m Max.piping length between IU and OU of the way
≤ 10 ≤ 25
L2 (one way) m Max.piping length between IU and OU of the way
≤ 10 ≤ 25
L3 (one way) m Max.piping length between IU and OU of the way
≤ 10 ≤ 25
L1+L2+L3 m Total liquid piping length
≤ 30
3U19:≤ 50
3U24:≤ 60
m
Drop between every two indoor units when the location of
the outdoor unit is among indoor units
≤ 1 ≤ 15
m
Drop between every two indoor units when the location of
the outdoor unit is at one side of indoor units
≤ 1 ≤ 7.5
H+ m Drop between the outdoor unit and the indoor unit
≤ 5 ≤ 15
m
Drop between the outdoor unit and the indoor unit when the
location of outdoor unit is among the indoor units
≤ 5 ≤ 7.5
m
Drop between the outdoor unit and the indoor unit when the
location of outdoor unit is at one side of indoor units
≤ 5 ≤ 15
h
H-
The piping length information, please refer the following table.
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