5.9 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 7 metres of height difference.
1
A
B
Fig. 28: Oil return measures
A: Outdoor unit
B: Indoor unit
1: 1 x oil pump bend in suction pipe to outdoor
unit every 7 metres of height difference, radius:
50 mm
6
Installation
6.1 Installation of the indoor unit
NOTICE!
Installation should only be performed by author-
ised specialists.
The unit is attached by means of a wall bracket,
considering the air discharge side located in the
lower part.
1.
Mark the mounting points on the structurally
permissible building sections according to the
dimensions of the wall bracket.
2.
If necessary, remove the break out opening
of the housing.
3.
Connect the refrigerant piping, electrical
cables and condensate drainage line to the
indoor unit as described below.
4.
Hang the indoor unit onto the wall bracket by
tilting it back slightly and by pressing the
bottom part of the unit against the bracket.
5.
Check again that the unit is level. (Fig. 29)
Fig. 29: Horizontal positioning
The wall bracket for the units must be attached
with suitable screws and anchors.
27
