Aprašymas
RVD250-A elektroninis valdiklis skirtas šildymui, karštam vandeniui
Pagrindinės elektroninio Siemens valdiklio RVD funkcijos:
- 8 programuojami iš anksto paruošti tipai
- saulės kolektorius buitinio vandens šildymui
- buitinio karšto vandens šildymas elektriniu šildytuvu
- papildymo funkcija
- komunikacija su Modbus
District heating controller RVD250-A
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 pumps