RVD250-A

Controller‚ 28 programmed plant types, instructions in de, en, fr, it, da, fi, sv

Stock no. S55370-C125

Stock no. S55370-C125

Multifunctional heating controller for use in district heating substations and district heating plants with LPB and M-bus communication. Suited for one heating circuit with d.h.w. heating in instantaneous systems or with storage tank. 28 programmed plant types. Operating voltage AC 230 V.

Key features:

  • Optimized for low return temperatures in district heating networks.

  • Display of time of day‚ time program‚ setpoints‚ actual values‚ limitations‚ errors‚ etc.

  • Optional remote operation via room unit

  • 2 independent switching programs each with 3 occupancy times per day

  • Yearly clock with automatic summer- / wintertime changeover

  • Power and / or volumetric flow limitation in combination with heat meter

  • Pump and valve protection

  • Automatic monitoring of sensors with display of alarm

  • Locking function for district heat parameters

  • Optional suppression of hydraulic creep

  • Frost protection function

  • DRT limitation for the reduction of peak loads and of idle heat

  • Maximum limitation of the return temperature on the primary side

  • Minimum and maximum limitation of the flow temperature

  • Optimum start / stop control of the heating system

  • Automatic ECO function

  • Legionella function

  • Forced charging function for plant with storage tank

  • Cooling down protection for the primary supply lines

  • Solar d.h.w. heating

  • D.h.w. heating with electric immersion heater

  • Refill function

  • Selectable heating period

Plant-specific:

  • Precontrol internal and interconnected

  • 1 mixing or pump heating circuit

  • D.h.w. heating with selectable priority:

  • Instantaneous systems

  • Storage charging system

  • Storage system with integrated heat exchanger

  • Circulating pump, 2 charging pump


Attribute

Value

Operating voltage

AC 230 V

Frequency

50 Hz

Power consumption

5.5 VA

Communication

LPB (interconnected controller), M-bus (slave)

Analog input, signal

DC 0...10, LG-Ni1000, NTC 575 V

Digital inputs, number

1

Digital inputs

Pulse transmitter, Status contact

Digital outputs

1 × PWM, DC 12, 2 × AC 230 V 2(2), 8 × AC 230 V 1(1) V

Dimensions (W x H x D)

144 x 96 x 109 mm