Mixer Circuit With Buffer Cylinder And Domestic Hot Water Cylinder (Hydraulic Plan 4) - Vaillant geoTHERM VWS Installation Instructions Manual

6 Electrical installation
6.6.5 Mixer circuit with buffer cylinder and dome-
stic hot water cylinder (Hydraulic plan 4)
The unregulated underfloor heating circuits are opera-
ted with the external heating circuit pump from the buf-
fer cylinder via a mixer. The feed temperature sensor
is located behind the external pump.
The heat pump responds to a buffer cylinder heat re-
quirement.
The heat pump also supplies a domestic hot water cylin-
der.
16
AF
WQ
230 V
230 V
Fig. 6.12 Hydraulic plan 4
Key to Fig. 6.12
25 Circulation pump
27 CH pump
30 Gravity brake
31 Regulating valve with position indicator
32 Cap valve
33 Air separator/Dirt filter
42a Expansion relief valve
42b Expansion vessel
43 Safety group, drinking water cylinder
46 Mixer valve
SP Cylinder temperature sensor
AF Outdoor sensor
VF1 Top temperature sensor, buffer
VF2 supply temperature sensor
RF1 Bottom temperature sensor, buffer
WQ Heat source circuit
KW Cold water
36
4 2a
3 2
33
4 2b
3 0
3 0
3 1
46 2 7 VF2
M
VF1
5 5
RF1
SP
Installation instructions geoTHERM VWS 0020046310_01
3 0
3 1
2 5
K W
43