3 066 RDF310.2/MM Flush-mounted Room Thermostat RDF310.
Use For controlling the room temperature in individual rooms and zones that are… · heated or cooled with 2-pipe fan coil units The thermostat controls… · · a 3-speed fan an on/off valve actuator in a 2-pipe system Suitable for use in systems with… · continuous heating or cooling mode · manual heating/cooling changeover · Manual changeover between heating and cooling mode · Maintenance of room temperature with integrated internal temperature sensor · Selection of operating mode with the operatin
Operation Temperature control The thermostat acquires the room temperature via its built-in sensor and maintains the setpoint by delivering 2-position valve control commands. The switching differential is 1 K in heating mode and 1 K in cooling mode (adjustable via parameters P08 and P09). Display The display shows the acquired room temperature or the setpoint of the current operating mode. This can be selected via parameter P18. Factory setting is display of the current room temperature.
Control sequences Water-based fan coil application Used in conjunction with a valve, either for heating/cooling with changeover, or heating only, cooling only. Heating mode Cooling mode Y11 Y11 w w T[°C] Room temperature SDH Switching differential “Heating” W Room temperature setpoint SDC Switching differential “Cooling” Y11 Control output “Valve” The valve receives the OPEN command via control output Y11 when ON 1. 2.
Fan operation The fan operates either in automatic mode or at the selected speed when using manual mode. In automatic mode, the fan speed depends on the setpoint and the current room temperature. When the room temperature reaches the setpoint, the control valve is closed and the fan either remains in fan speed 1 or switches off (parameter P21, factory setting: fan speed 1 in dead zone). In “Temperature-dependent” fan control the fan switches off (please see diagram below).
Control parameters To optimize the control performance, you can use local HMI to adjust a number of control parameters. Proceed as follows to change the control parameter. Parameter settings Parameter reset . 1. Set the thermostat to Protection mode 2. Press and hold the + and – buttons simultaneously for 3 seconds. Release them and, within 2 seconds, press and hold the + button again for 3 seconds. Then, P03 displays. 3. Select the required parameter by pressing the + and – buttons: 4.
Equipment combinations ON/OFF actuators Type of unit Product no. Data sheet Electromotoric ON/OFF actuator SFA21... 4863 MVI…/MXI… A6V11251892 SUA… 4832 Thermal actuator (for radiator valve) STA23... 4884 Thermal actuator (for small valves 2.5 mm) STP23...
Mechanical design The thermostat consists of two parts: · Front panel which accommodates the electronics, the operating elements and the built-in room temperature sensor · Mounting base with the power electronics The mounting base carries on the rear side the screw terminals. It fits on a square conduit box with fixing centres 60.3mm. The front panel engages in the mounting base and snaps on.
Mounting and installation The thermostat can be mounted on a recessed square conduit box with fixing centres of 60.3 mm. The mounting location on a wall should not be in niches or bookshelves, not behind curtains, above or near heat sources and wind outlet or inlet, and not exposed to direct solar radiation. Mounting height is about 1.5 m above the floor. Wiring Please also refer to the Mounting Instructions M3066… enclosed with the thermostat.
Technical data Power supply Caution Outputs Operational data Environmental conditions Norms and standards Operating voltage Frequency Power consumption AC 230 V +10/-15% 50/60 Hz Max. 4 VA No internal fuse! External preliminary protection with Max C 10 A circuit breaker required in all cases. Fan control Q1, Q2, Q3-N AC 230 V Rating 5 mA…4(2) A Control output Y11-N (N.O.) / Y12-N (N.C.
General Connection terminals solid wires or prepared stranded wires 1 x 0.4-1.5 mm2 0.17 kg white, RAL 9003 Weight Color of housing front *) The documents can be downloaded from http://siemens.com/bt/download. 1) No condensation is allowed. Connection terminals L, N Q1 Q2 Q3 Y11 Y12 Operating voltage AC 230 V Control output “Fan speed 1 AC 230 V Control output “Fan speed 2 AC 230 V Control output “Fan speed 3 AC 230 V Control output “Valve” AC 230 V (N.O.) Control output “Valve” AC 230 V (N.C.
Dimensions 86mm 86mm 10.5mm 63mm 26.
/14 Siemens Smart Infrastructure Flush-mounted Room Thermostat CB1N3066en 2019-10-25
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug Tel. +41 58 724 2424 www.siemens.com/buildingtechnologies 14/14 Siemens Smart Infrastructure Flush-mounted Room Thermostat © Siemens Switzerland Ltd, 2010 - 2019 Technical specifications and availability subject to change without notice.
