Viega
14 relay outputs and 12 inputs for Pt1000, Pt500 or KTY temperature sensorsUp to 5 extension modules via RESOL VBus® (45 sensors and 39 relays in total)
Inputs for analogue and digital Grundfos Direct Sensors™ as well as for FRH and FRHd humidity sensors
Integrated control of up to 4 high-efficiency pumps via PWM outputs
Data logging, storing, easy transfer of controller adjustments prepared and firmware updates via SD card
Cooling over the heating circuit with condensation detection by means of a dew point switch
Dew point calculation by means of the FRH(d) humidity sensor to avoid condensation
Simplified timer, 0-10 V boiler control and DHW preheating
Drainback option
Heat quantity measurement
Function control
Commissioning menu
Unit °C and °F selectable
HE pump control via adapter
Direct connection of an electric immersion heater up to 3 kW (230 V~)
DHW heating with rapid heat-up and thermal disinfection
Time and temperature control of the electric backup heating
Solar backup heating suppression
Heat quantity measurement via VFD Grundfos Direct Sensor™
PWM output for the speed control of a high-efficiency pump
Quick access to the holiday and the manual modes
Status display for a bidirectional HE pump
