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Figure 4: Air is supplied from a neighbouring room and discharged into the surroundings.
The most frequent air duct system is one, where the air is supplied from spaces with large quantities
of waste heat. Heat is extracted from the air, which is then discharged into the surroundings. Air
from kitchens, laundry rooms, bathrooms and toilets, etc. frequently contains odours and is
therefore discharged into the surroundings.
5.5
Installation
5.5.1
Hydraulic Connection
Hydraulic connection must be carried out in accordance with the current national and local
regulations which apply to the connection of water heaters. Figure below illustrates a correct
hydraulic connection of the heat pump. The maximum pressure in the piping system must not exceed
6 bar. If the tube heat exchanger inside the water heater will not be used, it must be filled with a
glycol mixture to avoid corrosion in the exchanger. The filled heat exchanger must not be closed air-
tight at both ends (pressure equalization due to temperature changes).
3
1
1
5
6
1
1
1
2 3
4
1
7
8
1.
Shut-off valve
2.
Pressure
reduction valve
3.
Non-return
valve
4.
Safety valve
5.
Expansion
vessel
6.
Discharge valve
7.
Circulation
pump
8.
Heat pump
Содержание WPA 233 E-LF
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