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All heat-conducting pipework must be provided with suitable thermal
insulation according to applicable regulations.
In cooling mode, all connections and lines must be insulated according to
applicable standards to prevent condensation.
5.2
Pipe connections, general
Dimension the pipes according to the instructions (table 9).
▶ Avoid pipe joints in the heat transfer pipes to minimise pressure
drop.
▶ Use PEX pipes for all connections between the heat pump and indoor
unit.
▶ Use only material (pipes and connections) from the same PEX
distributor to avoid leakage.
▶ Pre-insulated AluPEX pipes are recommended since they make
installation easier and prevent gaps in the insulation. PEX or AluPEX
pipes also devibrate and insulate against noise transfer to the heating
system.
If a different material than PEX is used, the following is required:
▶ Install a particulate filter intended for outdoor use on the heat pump
return line, directly on the heat exchanger.
▶ Insulate the particle filter as other connections.
▶ Devibrate the heat pump connection with a hose intended for outside
use and insulate it.
Heat
Heat transfer
1)
Pump
fluid delta (K)
4
4
5
5
7
5
10
5
12
6
1) Minimum dT at rated power and maximum pipe length. A lower dT can be achieved with lower heat requirements or short pipe lengths.
2) For pipes between the heat pump and indoor unit.
3) A flow rate of 15 l/min must be guaranteed on the primary side.
Table 9 Pipe dimensions and maximum pipe lengths (one-way) for connecting a heat pump to indoor unit CS5800iAW 12 M
5.3
Connect the indoor unit to the heat pump
▶ Connect the flow line from the heat pump to the heat transfer
medium in. Install an automatic air vent valve (VL1) in this line.
▶ Connect the return line to the heat pump to the heat transfer medium
out. Install a valve (VC4) in this line. Install the fill valve (VW2) on the
same connection on the indoor unit.
Compress 5800i AW – 6721858460 (2023/06)
2)
Δp (mbar)
Nominal flow
(L/min)
3)
15
420
17,3
355
20,2
263
27,4
255
34,6
201
1
Fig. 20 Pipe length A
[1]
Indoor unit, floor standing
[2]
Heat Pump
AX20 inner Ø 15
AX25 inner Ø 18
(mm)
(mm)
Maximum pipe length [A, Figure 20] PEX (m)
9
24
6
15
8
Hydraulic connections
A
2
0010039879-001
AX32 inner Ø 26
AX40 inner Ø 33
(mm)
(mm)
30
30
30
30
30
21
30
17
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