5.6 Oil return measures
If the outdoor unit is installed at a higher level than
the indoor unit, suitable oil return measures must
be taken. Usually, an oil pump bend is installed for
every 2.5 metres of height difference.
2
1
A
B
3
Fig. 30: Oil return measures
A: Outdoor unit
B: Indoor unit
1: One oil pump bend in suction pipe to outdoor
unit every 2.5 metres of height difference
2: Radius: 50mm
3: Max. 10m
5.7 Connection variants for the indoor unit
The following connection variants can be used for the refrigerant, condensate and control lines.
A
D
C
B
Fig. 31: Connection variants
A: Outlet on the wall, right
B: Outlet through the wall, right
C: Outlet through the wall, left
D: Outlet on the wall, left
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