Vaillant VR 68 - Hydraulic Diagram 1

Operating and Installation Manual for Solar Module VR 68 0020054784_008
4 Incorporation of the VR 68 into the solar heating system
4.1 Hydraulic diagram 1
– a wall-mounted boiler
– an uncontrolled heating circuit
– a solar circuit
– a bivalent solar hot water cylinder
– reheating of bivalent solar hot water cylinder using
preference switching valve (VUV)
– circulation pump for hot water controlled by VR 40
– a legionella protection pump
VR 68
VRC 430
AF (VRC 693,
VRC 9535)
SP 1
(VR 10)
230 V ~
ZP
VR 40
SP 2
(VR 10)
Ertrag
(VR 10)
KOL 1
(VR 11)
KOL 1-P
LEG-P
Fig. 4.1 Hydraulic diagram 1