Bosch Compress 7400i AW - Water Connecting Pipe

Installation
11
Compress 7400i AW – 6721833372 (2021/09)
Table 6 Pipe dimensions and maximum pipe lengths (single section) for connecting the heat pump to the indoor unit AWM
Table 7 Pipe dimensions and maximum pipe lengths (single section) for connecting the heat pump to the indoor unit AWMB
Table 8 Pipe dimensions and maximum pipe lengths (single section) when connecting the heat pump to the AWB indoor unit with mixer for the external
auxiliary heater
Table 9 Pipe dimensions and maximum pipe lengths (single section) for connecting the heat pump to the AWE indoor unit with integrated electric
booster heater
5.5.2 Water connecting pipe
NOTICE
Damage due to risk of frost!
If the condensate freezes and cannot be routed away from the heat
pump, the evaporator may be damaged.
▶ Always install pipe trace heating if ice is likely to form in the
condensate hose.
Remove condensate via a frost-free drain of the heat pump, possibly
equipped with pipe trace heating. The drain must slope sufficiently to
prevent water from accumulating in the pipe.
The condensate can be routed to either a gravel bed, a stone box or into
a rainwater gully.
▶ Route 32 mm plastic pipe from the condensate connection to a drain.
▶ Connection of pipe trace heating  Chapter 7.1.
Heat Pump Delta heat
transfer medium
(K)
Nominal flow
rate (l/s)
Maximum
pressure
reduction (kPa)
1)
1) For pipes and components between the heat pump and indoor unit.
AX20 inside Ø
15 (mm)
AX25 inside Ø
18 (mm)
AX32 inside Ø
26 (mm)
AX40 inside Ø
33 (mm)
Maximum pipe length [A, 13] PEX (m)
5 OR 5 0.33 55 7 16.5 30
7 OR 5 0.43 40 4 10.5 30
Heat Pump Delta heat
transfer medium
(K)
Nominal flow
rate (l/s)
Maximum
pressure
reduction (kPa)
1)
1) For pipes and components between the heat pump and indoor unit.
AX20 inside Ø
15 (mm)
AX25 inside Ø
18 (mm)
AX32 inside Ø
26 (mm)
AX40 inside Ø
33 (mm)
Maximum pipe length [A, 13] PEX (m)
5 OR 5 0.33 56 7 10 30 30
7 OR 5 0.44 46 4 10 30 30
Heat Pump Delta heat
transfer medium
(K)
Nominal flow
rate (l/s)
Maximum
pressure
reduction (kPa)
1)
1) For pipes and components between the heat pump and indoor unit.
AX20 inside Ø
15 (mm)
AX25 inside Ø
18 (mm)
AX32 inside Ø
26 (mm)
AX40 inside Ø
33 (mm)
Maximum pipe length [A, 13] PEX (m)
2)
2) The installation of a 3-way valve in the DHW circuit of the system was factored into the calculation of the pipe lengths.
5 OR 7 0.32 52 8.5 22 30
7 OR 7 0.32 54 22.5 30
Heat Pump Delta heat
transfer medium
(K)
Nominal flow
rate (l/s)
Maximum
pressure
reduction (kPa)
1)
1) For pipes and components between the heat pump and indoor unit.
AX20 inside Ø
15 (mm)
AX25 inside Ø
18 (mm)
AX32 inside Ø
26 (mm)
AX40 inside Ø
33 (mm)
Maximum pipe length [A, 13] PEX (m)
2)
2) The installation of a 3-way valve in the DHW circuit of the system was factored into the calculation of the pipe lengths.
5 OR 5 0.34 57 8.5 21.5 30
7 OR 5 0.43 44 10.5 30