Sonnenkraft HKM20 Manuel page 22

Installing on the wall
Mark fastening points, drill, set anchors, screw in panel
screws.
Put on rear insulation shell, hang station on the panel
screws and fasten with nuts
Directly connect connections below without corrugated
pipe
Caution!
Counterhold when tightening the union nuts.
Route all cables upward in the prepared cable ducts and
guide them out of the insulation at the side output.
22 GB