Siemens RDF400 Series Operating Instructions

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Operating Instructions

RDF400... – the room thermostat that allows you to set the ideal room temperature.
The thermostat provides Comfort, Energy Saving, and Protection mode and can operate in Auto timer mode using
8 programmable time schedules.
The fan operates either in Auto mode or at a speed selected in Manual mode.
You can either take advantage of the thermostat's factory settings or adjust it as needed.
Protection mode
Auto Timer mode
Comfort mode
Energy Saving mode
Measured room temperature,
setpoints and parameters
Current time of day
Actual room temperature
Fault indicator *
Operating mode button
**  ** 

View and set
Auto-Timer-Programm
Protection mode / system ON
* Needs to be configured by your HVAC installer
** Needs to be enabled via parameter P02
CE1B3076.2en / 25 Feb 2010
Condensation in the room *
Cooling demand / mode
Heating demand / mode
Electrical heater active
Automatic fan
Low fan speed
Medium fan speed
High fan speed
Buttons are locked
Weekday 1...7
(1 = Monday / 7 = Sunday)
Fan mode button
– Automatic fan (
– Manual fan (
Set time of day and weekday
Confirm settings
Colder / Warmer
Change room temperature
+ / – Press + or – to increase or decrease the current room temperature setpoint for
RDF400...
Comfort mode. The thermostat changes to Comfort
The setting range is 5...40 °C, unless limited by parameters P09 and P10.
Adjust fan speed / fan mode
Press the
In Auto mode, the thermostat automatically selects the fan speed based on set-
point and actual room temperature. The fan continues to run at low speed
(factory setting) after the room temperature reaches the setpoint .
In manual mode, the fan always runs at the speed that you select:
Low fan speed
Medium fan speed
High fan speed
For a single-speed fan, you can change the mode between
Change thermostat operating
Press operating mode button
In protection mode, the plant stops operating. However, if the room temperature
drops below 8 °C, heating is switched on to protect the room against frost.
Your HVAC installer can change the frost protection limit and set a heat pro-
tection limit as needed:
Changes made by installer:
In Comfort mode, the thermostat maintains the room temperature on the set-
point which can be readjusted using the + and – buttons.
In Energy Saving mode, the room temperature is maintained at a lower or higher
setpoint, thus saving energy and money.
Adjust parameters P11 and P12 to change the preselected setpoints.
The thermostat can be set to Energy Saving mode either by pressing the ope-
rating mode button if enabled (P02 = 2), or via an external signal (switch) such
)
as window contact, keycard or presence detector.
)
In Auto timer mode, the thermostat automatically switches between Comfort
and Energy Saving mode according to the time schedule.
Change from heating to cooling mode
/ Changeover between cooling and heating is either automatic using a heating /
cooling changeover sensor or a remote changeover switch, or manual by
pressing the operating mode button
thermostat is configured for cooling only or heating only, (see parameter P01).
Display for automatic changeover or heating only / cooling only:
Heating valve is open
Cooling valve is open
Display for manual changeover:
Thermostat is in heating mode
Thermostat is in cooling mode
Subject to change
.
button until you reach the desired fan mode.
to change the operating mode display.
 Frost protection: ........... ˚C
Heat protection: ........... ˚C
. No changeover is possible if the
and .
Siemens Building Technologies