Vaillant geoTHERM SERIES Manual de Instalação descarregar pdf (Página 35)

35Installation instructions geoTHERM VWS/VWW 0020057444_01

6.7.5 Mixer circuit with buffer cylinder and

domestic hot water cylinder

(Hydraulic plan 4)

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.

42a

42b

VF1

46 VF227

RF1

400 V

Fig. 6.11 Hydraulic plan 4

Key to Fig. 6.11

16 External sensor (AF)

25 Circulation pump

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

43 Safety group for hot water pipe

46 3-way mixer valve

VF1 Buffer cylinder head temperature sensor

VF2 Supply temperature sensor

RF1 Buffer cylinder base temperature sensor

SP Cylinder temperature sensor

WQ Heat source circuit

KW Cold water

Electrical installation 6

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Vaillant geoTHERM SERIES Manual de Instalação Página 35