Siemens RDF30U Technical Instructions
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Siemens RDF30U Technical Instructions

Room temperature controller with lcd for four-pipe fan coil units
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RDF30U
Room Temperature Controller
with LCD for Four-Pipe Fan
Coil Units
Description
Features
Application
Product Number
Room temperature controller with LCD for four-pipe fan coil units.
•
Outputs for separate, heating and cooling on/off valve actuators.
•
Outputs for a three-speed fan.
•
Control depending on the room or the return air temperature.
•
Operating modes: Normal, Economy and Standby.
•
Operating mode changeover input for remote control (Day/Night).
•
Air movement control function for avoiding damage resulting from moisture.
•
Selectable installation and control parameters.
•
Display of room temperature or setpoint (selectable).
•
Electronic minimum and maximum setpoint limits.
•
Operating voltage 24 Vac.
Typical use:
•
For controlling room temperature in individual rooms that are heated or cooled with
four-pipe fan coil units.
•
For opening or closing two valves and for switching a three-speed fan.
Suitable for four-pipe fan coil unit systems with:
•
automatic heating/cooling changeover.
•
continuous heating or cooling mode.
RDF30U
Technical Instructions
Document No. 155-335
September 27, 2007
Siemens Industry, Inc.

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Summary of Contents for Siemens RDF30U

  • Page 1 • For opening or closing two valves and for switching a three-speed fan. Suitable for four-pipe fan coil unit systems with: • automatic heating/cooling changeover. • continuous heating or cooling mode. Product Number RDF30U Siemens Industry, Inc.

  • Page 2: Operation

    Technical Instructions RDF30U Room Temperature Controller with LCD Document Number 155-335 for Four-Pipe Fan Coil Units September 27, 2007 Accessories ARG70 Adapter plate for 4-inch × 4-inch or 2-inch × 4-inch conduit boxes 141-570 Lockable thermostat guard QAH11.1 Changeover/remote temperature sensor...

  • Page 3: Operating Modes

    Figure 1. Water-based Fan Coil Heating and Cooling Mode. Return Air Temperature The RDF30U provides control based on the measured room temperature or the fan coil (Optional) unit’s return air temperature. It detects if a QAH11.1 cable temperature sensor is connected to input 9-8 and then operates automatically according to that temperature.
  • Page 4 Technical Instructions RDF30U Room Temperature Controller with LCD Document Number 155-335 for Four-Pipe Fan Coil Units September 27, 2007 Avoiding damage due to To avoid damage due to moisture in very warm and humid climates resulting from lack moisture (continuous...
  • Page 5 RDF30U Room Temperature Controller with LCD Technical Instructions For Four-Pipe Fan Coil Units Document Number 155-335 September 27, 2007 Table 1. Control Parameters. Para- Description Setting Range Factory meter Setting Heating setpoint in Economy mode OFF, 61F (operating mode changeover contact activated ) 41F to 68F (5C to 20C) (in increments...

  • Page 6: Equipment Combinations

    Technical Instructions RDF30U Room Temperature Controller with LCD Document Number 155-335 for Four-Pipe Fan Coil Units September 27, 2007 Ordering The QAH11.1 temperature sensor can be used as a return air temperature sensor. The changeover sensor and the valves must be ordered separately.
  • Page 7 RDF30U Room Temperature Controller with LCD Technical Instructions For Four-Pipe Fan Coil Units Document Number 155-335 September 27, 2007 Table 3. DIP Switches. DIP Switch Description Position ON (Factory Setting) Position OFF Fan control Fan control is temperature- Fan control is temperature-...

  • Page 8: Specifications

    The cables used must meet the insulation requirements for live voltage. Calibrating the Sensor If the room temperature displayed by the controller is inconsistent with the room temperature being measured, the temperature sensor of the RDF30U can be recalibrated. To recalibrate, change Parameter P09. Operating voltage 24 Vac, +20/-25%...

  • Page 9: Wiring Terminals

    RDF30U Room Temperature Controller with LCD Technical Instructions For Four-Pipe Fan Coil Units Document Number 155-335 September 27, 2007 Operation Specifications, Temperature 32°F to 122°F (0°C to 50°C) Continued Humidity <95% rh Environmental Conditions Transport and storage Temperature -13°F to 158°F (-25°C to 70°C) Humidity <95% rh...
  • Page 10 Inches (Millimeters) Figure 7. Base Plate. Figure 6. RDF30U Controller. Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners.

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