User Manual
Table Of Contents
- 1. About this document
- 2. Summary
- 3. Functions
- 3.1 Temperature control
- 3.2 Operating modes
- 3.3 Room temperature setpoint
- 3.4 Applications overview
- 3.5 Additional functions
- 3.6 Control sequences
- 3.7 Control outputs
- 3.8 Fan control
- 3.9 Multifunctional input, digital input
- 3.10 Handling faults
- 3.11 Modbus RTU mode
- 3.12 Communication objects
- 3.13 Control parameters
- 4. Handling
- 5. Connection
- 6. Mechanical design
- 7. Technical data
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Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure 2020-12-01
2.3 Functions
Fan coil units via ON/OFF outputs:
· 2-pipe system *
· 2-pipe system with electric heater
· 4-pipe system
Chilled / heated ceilings (or radiators) via ON/OFF outputs:
· Chilled / heated ceiling *
· Chilled / heated ceiling with electric heater
· Chilled / heated ceiling and radiator / floor heating
Compressors: via ON/OFF control
· 1-stage compressors in DX type equipment
· 1-stage compressors in DX type equipment with electric heater
* with both ON/OFF or modulating control output
The room thermostats are delivered with a fixed set of applications.
The relevant application is selected and activated during commissioning using one
of the following tools:
· Local DIP switch and HMI
· Modbus commissioning tools
· Operating modes: Comfort, Economy and Protection
· ON/OFF or 3-position control outputs (relay)
· Output for 3-speed or 1-speed fan
· Automatic or manual heating / cooling changeover
· Backlit display
· AC 230 V operating voltage
Use
Features