Vaillant geoTHERM SERIES Manuel d'installation télécharger pdf (Page 33)

33Installation instructions geoTHERM VWS/VWW 0020057444_01

6.7.3 Mixer circuit with buffer cylinder

(Hydraulic plan 2)

The unregulated underfloor heating circuits are operat-

ed by the external heating circuit pump from the buffer

cylinder via a mixer. The flow temperature sensor sits

behind the external pump.

The heat pump responds to a demand for heat from the

buffer cylinder.

VF1

VF2

RF1

42b

42a

400 V

Fig. 6.9 Hydraulic plan 2

Key to Fig. 6.9

16 External sensor (AF)

27 CH pump

30 Non-return valve

31 Control valve with position indication

32 Cap valve

33 Air separator/Dirt filter

42a Expansion relief valve

42b Expansion vessel

46 3-way mixer valve

VF1 Buffer cylinder head temperature sensor

VF2 Supply temperature sensor

RF1 Buffer cylinder base temperature sensor

WQ Heat source circuit

Electrical installation 6

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Vaillant geoTHERM SERIES Manuel d'installation Page 33