Pipework connections
13
Compress 5800i AW – 6721862724 (2023/06)
Table 7 Pipe dimensions and maximum pipe lengths (one-way) for connecting a heat pump to indoor unit CS6800iAW 12 E with integrated immersion
heater
5.3 Connect the indoor unit to the heat pump
▶ Select pipe size according to the heat pump manual.
▶ Connect heat transfer medium pipes in from the heat pump. Install a
drain valve [VA0] in this pipe.
▶ Connect heat transfer medium pipes out to the heat pump. Install the
fill valve (VW2) on the same connection on the indoor unit.
Fig. 16 Connection of the indoor unit to the heat pump
[1] Heat transfer medium out to heat pump
[2] Heat transfer medium in from heat pump
[3] Flow line from the heat pump
[4] Return line to the heat pump
5.4 Connect the indoor unit to the heating system
For easy service of the expansion vessel a cap valve must be install ed at
the connection.
▶ Run the leakage drain hose down to a frost protected drain.
▶ Connect the particulate filter [SC1], expansion vessel, magnetite
separator and the return line from the heating system.
▶ Connect the flow line to the heating system.
7 5 20,2 286 7 30
10 5 27,4 284 22 30
12 6 28,8 231 13 30
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.
Heat
Pump
Heat transfer
fluid delta (K)
1)
Nominal flow
(L/min)
p (mbar)
2)
AX20 inner Ø 15
(mm)
AX25 inner Ø 18
(mm)
AX32 inner Ø 26
(mm)
AX40 inner Ø 33
(mm)
Maximum pipe length [A, Figure 15] PEX (m)
VW 2
VA 0
0010049175-001
3
4
1
2
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