Mixer Circuit With Buffer Cylinder (Hydraulic Plan 2) - Vaillant geoTHERM VWS Installation Instructions Manual

6 Electrical installation
6.6.3 Mixer circuit with buffer cylinder (Hydraulic
plan 2)
The unregulated underfloor heating circuits are opera-
ted 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.
16
AF
WQ
230 V
230 V
Fig. 6.10 Hydraulic plan 2
Key to Fig. 6.10
27 CH pump
30 Gravity brake
31 Control valve with position indication
32 Cap valve
33 Air separator/Dirt filter
42a Expansion relief valve
42b Expansion vessel
46 Mixer valve
AF Outdoor sensor
VF1 Top temperature sensor, buffer
VF2 supply temperature sensor
RF1 Bottom temperature sensor, buffer
WQ Heat source circuit
34
42a
46
VF1
RF1
33
32
42b
Installation instructions geoTHERM VWS 0020046310_01
30
31
VF2
M
27
30
31