Noise Information - Danfoss DHP-A Installation Instructions Manual

Figure 33. The brine's supply line
1. Install the out pipe with all the accompanying components.
2. Install the expansion tank with the safety valve.
3. Fit both brine pipes with anti-diffusion insulation running all the way from the heat pump to the lead-in in
the wall. The brine pipes running outside the house to the collector can be buried, however they must be
well insulated.
Caution! Applies to DHP-A:Bear in mind that the outdoor unit may move during defrosts, use
flexible hoses to connect the pipes from the heat pump and pipes on the outdoor unit.
5.3.7 Connection to outdoor unit
Connection for the brine circuit from the heat pump to the outdoor unit can be carried out using pipes or hoses.
Depending on what connection is selected and what diameter the connection has, there is a maximum length that
the connection may be. The maximum lengths in the table below are based on ethylene glycol (which is mixed to
anti-freeze protection down to -32±1°C) at 0°C.
Table 1. Max coil length between heat pump and outdoor unit
DHP-A, DHP-AL Ext.avail.
Size
6
8
10
12
*) Not recommended because of high liquid speeds with risk of corrosion/noise problems.
5.4

Noise information

5.4.1 Flexible hoses
Caution! The press sleeves may never be used as a counterhold when tightening connections.
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. We recommend that flexible hoses are
36 – Installation instructions VMBMA1002
Calculated maximum coil length between the HP and outdoor unit, in metres
press.
kPa Cu22
Øi = 20.0
30 34
(2 x 17)
63 21
(2 x 10.5)
50 11 *
(2 x 5.5)
43 5 *
(2 x 2.5)
Cu28 PEM DN 25
Øi = 25.6 Øi = 21.0
133 48
(2 x 66.5) (2 x 24)
98 30
(2 x 49) (2 x 15)
47 13 *
(2 x 23.5) (2 x 6.5)
26 8 *
(2 x 13) (2 x 4)
PEM DN 32
Øi = 28.0
173
(2 x 86.5)
150
(2 x 75)
78
(2 x 39)
44
(2 x 22)