+ RF-controlled heating circuit controller for up to 2 heating circuits + RF communication based on KNX standard (868 MHz, bidirectional) + Connection facility for one 3- or two 2-position actuators + Mains-powered AC 230 V + 2 universal relay outputs + 1 universal input + 1 universal output DC 0...10 V
Use: + For integration into the Siemens Synco 900 system + Suited for use in heating plant: - With central heat distributors (e.g. underfloor heating or soft steel piping system) - For use with motorized radiator valves (e.g. with sill covers) + Heating circuit control with 2- or 3-position actuators + Universal relay outputs, e.g. for control of the apartment pump, DHW heating, or fan speeds + Universal input, e.g. for connection of a DHW temperature sensor or an alarm + Universal output DC 0...10 V for forwarding the heat demand signal
Equipment combinations: The RRV912 heating circuit controller is designed for use with the Siemens Synco 900 system. For more detailed information about equipment combinations, refer to the Data Sheet covering the central apartment unit (CE1N2707en).
Scope of delivery: The RRV912 is supplied complete with Mounting Instructions.
Product documentation: The Operating and Commissioning Instructions for the RRV912 are contained in the product documentation of the central apartment unit.
Functions Main function: In operation, the RRV912 maintains the required room temperature of the individual heating circuits. The central apartment unit delivers the relevant data via RF.
Universal relay outputs: The universal relay outputs can be used to control different types of devices. Release is controlled via the central apartment unit and delivered via RF. 
Universal input: The universal input is used for connection of the DHW temperature sensor, for example. The data are forwarded to the central apartment unit via RF. 
Universal output DC 0...10 V: The RRV912 converts percentage-scaled signals from the central apartment unit (e.g. heat demand) to analog DC 0...10 V signals. 
 = For detailed information about assignment options for the inputs and outputs, refer to the Synco 900 Mounting and Commissioning Instructions (CE1C2707en).
Parallel operation: Several heating circuits can be assigned to one room and, therefore, operated in parallel. In that case, the first heating circuit ensures the actual room control and, at the same time, controls the other assigned heating circuits.
Antilime function: The antilime function is triggered by the central apartment unit. When receiving an antilime command, the heating circuit valve will be fully opened and then closed again. When the antilime function is completed, the valve will return to the previous control position.
Summer operation: Summer operation is triggered by the central apartment unit. When receiving a command to start summer operation, the heating circuit valve will be opened or closed, depending on the position predefined by the central apartment unit. If the antilime function is activated in summer operation, it will be performed. When completed, the control loops will resume summer operation.
Window airing function: The window airing function is triggered by the central apartment unit. The function interferes in the control process in a way that overheating of the room will be avoided both during and after the window airing time.
Frost protection for the room: Frost protection for the room becomes active if the room temperature drops below the frost protection setpoint. It remains active until the room temperature returns to a level 1 K above the frost protection setpoint.
Binding: The binding of the first selected channel is used by the RRV912 to sign on at the central apartment unit, thus ensuring integration into the RF system. Then, the other channels can be assigned to other rooms or function groups. The binding process is triggered via the multifunction button and indicated by the multifunction LED.
State query: The multifunction button can be used to query the state of the configured control channels. The state is indicated by the multifunction LED.
RF binding test: The multifunction button can be used to trigger a binding test per channel. The test is made to check the radio link to the central apartment unit. The RF binding test is indicated by the multifunction LED.
Resetting a channel: The multifunction button can be used to reset a configured channel to its supply state. Then, the channel must be reconfigured. The state is indicated by the multifunction LED.
Supply state: The multifunction button can be used to reset the RRV912 to its supply state. Then, the RRV912 must be reintegrated into the system.
RF failure: If radio transmission between the RRV912 and the central apartment unit breaks down, control is no longer ensured. The heating circuit valves will open. When radio transmission is reestablished, the RRV912 will return to control mode.
Mains failure: In the event power supply to the RRV912 is interrupted, control is no longer ensured. The positions of the individual actuators can only be changed manually on the actuators themselves. When mains supply is restored, the RRV912 will return to control mode.
Technical data: - Operating voltage: AC 230V (+/- 10%) - Power consumption (with no external load): 7 VA - Kommunication: KNX RF-compatible, 868.3 Mhz, bidirektional (RF) - Range inside buildings: 30m - Measuring range: 0...120°C - Type of controller: 2-position PID / 3-position PID - Type triac: AC 230V, max. 30mA - Quantity triac: 2 - Universal input type: LG-Ni 1000 (on/off) - Universal input quantity: 1 - Universal relay output type: AC 24...230V, 0.02...2 (2) A - Universal relay output quantity: 2 - Housing: IP30 to EN 60529 - Manufacturer number: RRV912
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