5.7 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 5.0 metres of height difference.
1
A
B
2
Fig. 34: Oil return measures
A: Outdoor unit
B: Indoor unit
1: One oil pump bend in suction pipe to outdoor
unit every 5.0 metres of height difference,
radius: 50 mm
2: Max. 10 m
5.8 Connection variants for the indoor unit
The following connection variants can be used for the refrigerant, condensate and control lines.
D
C
D
B
A
C
A
B
Fig. 35: Connection variant (view from the rear)
A: Infeed of the refrigerant piping at the wall, left
B: Infeed of the refrigerant piping through the wall,
left
C: Outlet through the wall, right
D: Outlet at the wall, right (the refrigerant piping
must be bent through 180 degrees for this)
33