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RDU340
- QAH11.1
  - QAA32

CE1N3078en

2019-10-29

Smart Infrastructure

078

Flush-mounted

room thermostat RDU340

- for CAV / VAV heating and cooling systems

- for AHU systems

- for universal heating and cooling systems

· Modulating PI control

· Control depending on the room or the return air temperature

· Output for a DC 0…10 V actuator and AC 230 V electric heater (ON/OFF)

· Automatic or manual heating/cooling changeover

· Operating modes: Comfort, Economy and Protection

· Two multifunctional inputs for keycard contact, external sensor, etc.

· Adjustable commissioning and control parameters

· Minimum and maximum setpoint limitation

· Adjustable minimum and maximum limitation for air flow signal DC 0...10 V

· Output signal inversion as an option (DC 0...10 V à DC 10...0 V)

· Mounting on recessed square conduit box, 60.3 mm fixing centers

· AC 24 V operating voltage

· User and parameter settings can be retained or restored with power loss

Summary of content (12 pages)

PAGE 1
3 Flush-mounted room thermostat 078 RDU340 - for CAV / VAV heating and cooling systems for AHU systems - for universal heating and cooling systems - CE1N3078en 2019-10-29 · · Modulating PI control Control depending on the room or the return air temperature · Output for a DC 0…10 V actuator and AC 230 V electric heater (ON/OFF) · · Automatic or manual heating/cooling changeover Operating modes: Comfort, Economy and Protection · Two multifunctional inputs for keycard contact, external sensor, et
PAGE 2
Use Control of the room temperature in individual rooms of ventilation or air conditioning plants that are: · Heated or cooled by single duct. · Heated or cooled by single duct with electric heater. The RDU340 is suitable for use with VAV systems in connection with the VAV compact controllers types G…B181.1E/3. The RDU340 can also be used as an AHU temperature controller in connection with valve actuators, as well as for universal heating and cooling applications with DC 0...10 V actuators.
PAGE 3
Applications Prior to snapping the front panel to the base, use the DIP switches on the inner side of the front panel to commission the thermostat’s applications and the behavior of the output signal.
PAGE 4
Operating voltage RDU340 AC 24 V 3-pos on/off DC 0...10 V -- ü ü Housing color Product no. Infrared receiver Control output Backlit LCD Type summary white Equipment combinations Product no. Data Sheet*) QAH11.1 1840 QAA32 1747 SSA61... 4893 Electrical actuator, DC 0...10 V (for 2- and 3-port valves / V…P45) Electrical actuator, DC 0...10 V (for small valve 2.5 mm) Electrical actuator, DC 0...10 V (for small valves 5.5 mm) Electrical actuator, DC 0...
PAGE 5
VAV compact controller GDB181.1E/3 3544 *) The documents can be downloaded from http://siemens.com/bt/download.
PAGE 6
Accessories Designation Changeover mounting kit (50 pcs/package) Plastic mounting spacer for flush mounted thermostats for increasing the headroom in the conduit box by 10 mm Conduit box for flush mounted thermostat Product no. ARG86.3 Data Sheet*) N3009 ARG70.3 N3009 ARG71 / S55770-T137 N3009 *) The documents can be downloaded from http://siemens.com/bt/download. Ordering When ordering, indicate both product number and designation: E.g. RDU340 room thermostat Order valve actuators separately.
PAGE 7
Display 2. 6 control parameters. 3 1 Display room temperature, setpoints and Symbol used to display the current room temperature 2 4 3. Heating/cooling mode Cooling mode Heating mode, Electric heater active 7 1. 5 4. Additional user information 5. Key lock active 6. Condensation in room Operating mode (dewpoint sensor active) Protection Comfort 7.
PAGE 8
Mounting and installation Mount the room thermostat on a recessed square conduit box with 60.3mm fixing centers. Do not mount on a wall in niches or bookshelves, behind curtains, above or near heat sources, or exposed to direct solar radiation. Mount about 1.5 m above the floor.
PAGE 9
Control sequence · The control sequence may need to be set via parameter P01 depending on the application. The factory setting for the single duct application is “Cooling only”. Calibrate sensor · Recalibrate the temperature sensor if the room temperature displayed on the thermostat does not match the room temperature measured (after min. 1 hour of operation). To do this, change parameter P05.
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Operational data Switching differential, adjustable Heating mode Cooling mode Setpoint setting and range Comfort Economy Protection Multifunctional input X1/X2 Input X1 Input X2 Environmental conditions Standards and directives Environmental compatibility General (P30) (P31) (P08) (P11-P12) (P65-P66) Selectable 0…6 Factory setting = 3 (P38) Factory setting = 2 (P40) Built-in room temperature sensor Measuring range Accuracy at 25 °C Temperature calibration range Settings and display resolution Setpoin
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Connection terminals G G0 X1 M X2 L Y21 SELV Y10 G0 G, G0 L Y21 Y10 X1, X2 M Operating voltage thermostat AC 24 V Operating voltage for electric heater AC 230 V Control output for electric heater Control output for DC 0…10 V actuator Multifunctional input for temperature sensor (e.g. QAH11.
PAGE 12
Dimensions Dimensions in mm Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug Tel. +41 58 724 2424 www.siemens.com/buildingtechnologies © Siemens Switzerland Ltd, 2008 - 2019 Technical specifications and availability subject to change without notice.