Noise Information; Flexible Hoses - Danfoss DHP-AX Installation And Service Instructions Manual

14

Noise information

14.1

Flexible hoses

All pipes should be routed in such a way that vibrations cannot be transmitted from the heat pump through
the piping and out into the building. This also applies to the expansion pipe. To avoid the transmission of
vibrations, we recommend that flexible hoses are used for the supply line and return line on both the heating
system and brine system sides. Flexible hoses are available to purchase as accessories. The figures below show
how appropriate and inappropriate installations look using this type of hose.
To avoid noise caused by pipe mounting, rubber-coated clamps should be used to prevent the transmission of
vibrations. However, installation should not be too rigid and the clamps must not be too tight.
Figure 29: Do not twist the flexible hoses as they are installed. At threaded connections, use a counterhold spanner.
Figure 30: Cut the hose to the correct length to avoid excess bowing-out or stretching at bends.
Figure 31: Cut the hose to the correct length to avoid excess bowing-out or stretching and offset the ends so that the hose is not installed
42 – Service
Figure 32: Use fixed pipe bends to avoid excess stress on bends next to connections.
completely straight.
VMBMH302