Vaillant geoTHERM Installation Instructions Manual

Also see for geoTHERM SERIES: System Installation Instructions Installation and servicing Instructions for use Operating instructions

Contents

Electrical installation60 Installation instructions geoTHERM 0020051574_047> Fit an external, motor-controlled 3-way brine mixingvalve> Connect the external motor-controlled 3-way brine mix-ing valve to terminal HK2 (6) (¬ Fig. 7.18).> Fit an external heating/cylinder charging diverter valve.> Connect an external heating/cylinder charging divertervalve to terminal LP/UV1 (2) (¬ Fig. 7.18) an.> Fit two external heating/cooling diverter valves anda second external brine circuit pump cooling in the brinecircuit.> Connect the two external heating/cooling diverter valvesand the second external brine circuit pump cooling toterminal SK2-P (4) (¬ Fig. 7.18) an.> Fit an external 3-way brine mixing valve cooling.> Connect the external 3-way brine mixing valve cooling asdescribed in (¬ Ch. 7.3.9).Also refer to the sample hydraulic schemes (¬ Fig. 5.2 to¬ Fig. 5.6).7.7 Installing optional accessoriese Danger!Risk of electric shock!> Switch of the electricity supply beforeyou connect additional equipment to thecontroller PCB via the eBUS.> Check that there is no voltage.You can connect the following optional accessories:– Up to six VR 60 mixer modules to add twelve system cir-cuits to the heating installation (factory set by default asmixed circuits).– Up to six VR 90 remote control units to control the firstsix heating circuits.– vrnetDIALOG 840/2 or 860/2– Each connection is connected in parallel to an eBUS ter-minal (11) (¬ Fig. 7.18).7.7.1 Installing VR 90If you install several heating circuits, you can connect a sep-arate VR 90 remote control unit for each of the first sixheating circuits. It allows the operation mode and targetroom temperature to be set and, if required, it uses theinstalled room temperature sensor to take the room tem-perature into consideration. In addition, the “switch-onroom temp.” must be set in the controller for the heatpump (menu C5) (¬ Tab. 9.6) or in the VR 90.In each case, you can set the parameters for the relevantheating circuit (time programme, heating curve, etc.) andselect special functions (Party etc.).In addition, it is possible to query the heating circuit and todisplay service and fault messages.To fit the VR 90 remote control unit, see its enclosed¬ installation instructions.The VR 90 remote control units communicate with theheating controller via the eBus. You can connect them toany interface in the system. You need only to ensure thatthe eBUS interface is connected to the heat pump control-ler.eBUS7.21 Installing remote control unitsThe structure of the Vaillant system allows you to lay theeBus from component to component (¬ Fig. 7.21. Switchingthe lines therefore does not impair communication.All eBus connector plugs are designed to allow you to wireat least 2 x 0.75 mm2 for each connection lead.The use of cable with a cross-section of 2 x 0.75 mm2 istherefore recommended for eBUS cables.Setting the bus addressTo ensure that no problems can occur in the communica-tion between all components, each remote control unitmust receive an addressing that corresponds to the control-ling heating circuit.> On the first VR 90 remote control unit, set the busaddress to “2” for heating circuit 2 (integrated into thegeoTHERM heat pump).> For any other remote control units, set bus differentaddresses that also differ from this and whose numberscorrespond to the heating circuit, e. g. bus address 5 forheating circuit 5 (the addresses 0, 1and 3 are assigned internally and are not available). Takenote of the VR 90 installation manual.