Use
For controlling the room temperature in individual rooms and zones that are
• heated or cooled with 2-pipe fan coil units
• cooled with a single compressor in DX type equipment
The controller controls
• a 3-speed fan
• either a valve actuator in a 2-pipe system, or
• a 1-stage compressor in DX type equipment
Suitable for use in systems with
• continuous heating or cooling mode
• manual heating / cooling changeover
Functions
• Changeover between heating and cooling mode is manually
• Maintenance of room temperature with integrated temperature sensor
• Selection of operating mode with the operating mode button
or Mode on the con-
troller
• 3-speed fan control (automatic or manual)
• Output for 2-position (on / off) valve actuator or 1-stage compressor
• 8 programmable timers for changing over between Normal operation and Energy
Saving mode (RDF410.21)
• Optional with infrared remote control and LCD backlight (RDF310.21, RDF410.21)
Controller
Temperature control
The controller acquires the room temperature via its built-in sensor and maintains the
setpoint by delivering 2-position valve control commands or compressor output com-
mands.
The switching differential is 2 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 operat-
ing mode. This can be selected via parameter P18. Factory setting is display of the
current room temperature.
The heating
and cooling symbols on the display show the status of the fan coil.
This means that the symbols are also shown while the controller operates in the neutral
zone.
If required, room temperature and setpoint can also be displayed in °F in place of °C by
changing parameter P17.
2/14
Siemens Room Temperature Controllers N3067en
Building Technologies 01.10.2007
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