Vaillant geoTHERM Installation Instructions Manual

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

Contents

Electrical installation58 Installation instructions geoTHERM 0020051574_047b Caution!Risk of damage from overload!The maximum power for all actuators/con-sumers that are connected to the controllerPCB must not exceed 4 A.> Observe the following connection limits:I max = 2 A, U max = 230 VThe controller PCB has a cover plate for protection and thiscover plate has openings for the eBUS/vrDIALOG 810/2connection (15) and for the voltage supply LED (18).To replace the fuses (17) or (19), you must remove thecover plate.7.5 Installing the supplied accessoryThe following must be connected for the samplehydraulic scheme for hydraulic scheme 1 (¬ Fig. 5.2):– VRC-DCF receiver with outside temperature sensor– VF2 flow temperature sensorThe following must be connected for the samplehydraulic scheme for hydraulic scheme 2 (¬ Fig. 5.3):– VRC-DCF receiver with outside temperature sensor– VF2 flow temperature sensor– VF1 flow temperature sensor buffer tank– RF1 Return temperature sensor buffer tankThe following must be connected for the samplehydraulic scheme for hydraulic scheme 3 (¬ Fig. 5.4):– VRC-DCF receiver with outside temperature sensor– VF2 flow temperature sensor– DHW tank sensor SPThe following must be connected for the samplehydraulic scheme for hydraulic scheme 4 (¬ Fig. 5.5):– VRC-DCF receiver with outside temperature sensor– VF2 flow temperature sensor– DHW tank sensor SP– VF1 flow temperature sensor buffer tank– RF1 Return temperature sensor buffer tankThe following must be connected for the samplehydraulic scheme for hydraulic scheme 10 (¬ Fig. 5.6):– VRC-DCF receiver with outside temperature sensor– VF2 flow temperature sensor– DHW tank sensor SP– VF1 flow temperature sensor buffer tank– RF1 Return temperature sensor buffer tank7.5.1 Installing the VR 10The VR 10 standard sensor is designed in such a way that itcan be fitted in three different positions, depending on yourrequirements:– as an immersion sensor, e. g. as a tank sensorto a tank sensor pocket.– as a flow sensor in a hydraulic switch.– as a clamp-on sensor on the heating pipein the supply or return.7.19 Installing the VR 10 standard sensor as a clamp-on sensorYou can use the enclosed strap to secure the sensor as aclamp-on sensor to the heating pipe in the supply or return.We recommend that the pipe together with the sensor beinsulatedto ensure optimum temperature measurement.> Install the VR 10 standard sensor(s) in accordance withthe requirements of the hydraulic scheme and connect itto the respective terminals on the controller PCB (¬ Fig.7.18).The controller automatically recognises the supplied sensor.VR 10 sensors do not have to be registered or configured.7.5.2 Installing the VRC DCFThe supplied VRC DC receiver must always be installed,even if another DCF receiver is already installed. This can-not be used for the heat pump. This also applies for sys-tems that have a fixed value configuration and systems thathave the VRC 620/630 bus modular control system.b Caution!Risk of malfunction!If the supplied VRC DCF receiver with exter-nal sensor has not been installed, the oper-ating panel display shows a temperature of-60 °C. It is not possible to correctly controlthe flow temperature and the external elec-tric auxiliary heating. No warning messageis recorded in the Error History.> Install the supplied VRC DCF receiverwith external sensor.