46 EN/39B/06.2018 © STULZ SpA – all rights reserved
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8. Pipe mountings have to be provided at least every 2 m. The pipe mountings are to be insulated
against vibrations. The first pipe mountings behind the indoor unit as well as upstream of the
outdoor unit should be flexible. So that the pressure lines can expand, the pipe mountings are to
be attached at least 1 m from the bend.
9. All copper pipes which lead through masonry are always to be insulated in this area so that the
pipes are not attacked by the masonry and a certain flexibility is retained.
10. Make sure that all refrigerant pipes are perfectly clean and dry inside.
In the following table the drop of cooling capacity is shown, due to the pressure losses on gas and
liquid lines.
Model Piping distance [m] Cooling Capacity drop
40
Up to 10 2% with 10 m
From 10 to 20 3% with 20 m
From 20 to 30 4% with 30 m
60
Up to 10 3% with 10 m
From 10 to 20 3% with 20 m
From 20 to 30 5% with 30m
80
Up to 10 2% with 10 m
From 10 to 20 3% with 20 m
From 20 to 30 4% with 30 m
A0
Up to 10 3% with 10 m
From 10 to 20 4% with 20 m
From 20 to 30 4% with 30 m
A2
Up to 10 4% with 10 m
From 10 to 20 4% with 20 m
From 20 to 30 5% with 30 m
A5
Up to 10 22
From 10 to 20 22
From 20 to 30 28
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