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6.3 Pipe length and the elevation
Capacity
Btu/h
Pipe size
Standard
length
(m)
Min.
length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
refrigerant
(g/m)
Gas
Liquid
21K/24K/28K
5/8
’’ (Ф16.0)
3/8
’’ (Ф9.52)
5
3
10
25
40
Caution:
Oil Traps: oil traps must be fitted to vertical suction risers where outdoor unit is above indoor unit. Fit a trap at the bottom
of the vertical rise and then at 5m (maximum) intervals.
If the outdoor unit is installed below the indoor unit (fig 1)
– no trap is required in such installation.
If the units are installed at the same level
– no trap is required in such installation.