Siemens RDF340 Series

CE1B3076.1en / 02.Jun 2010 Subject to change Siemens Building Technologies
Operating Instructions
RDF300…, RDF340…,
RDU340…
RDF/RDU… – the room thermostat that allows you to set the ideal room temperature you want.
The thermostat provides Comfort mode, Economy mode and Protection.
The fan operates either in automatic mode or at the selected speed when using manual mode.
You can either rely on the factory settings or make adjustments that suit your individual needs.
Change room temperature
+ -
Press + or - to increase or decrease the current room temperature setpoint for Comfort mode. The thermostat
changes to Comfort
.
The setting range is from 5...40 °C, unless limited by parameters P09 and P10.
Adjust fan speed / fan mode
Press the button until you reach the desired fan mode.
In Auto mode, the fan speed is automatically selected by the thermostat and
depends on the setpoint and the actual room temperature. When the room
temperature has reached the setpoint, the fan remains in fan speed low (factory
setting)
In manual mode the fan operates independently and always runs at the same
speed: Low, medium or high.
Low fan speed
Medium fan speed
High fan speed
For a single-speed fan, the mode can be changed between
and .
Set the thermostat to Protection
Press the operating mode button several times until the display shows the
symbol to indicate that Protection is selected.
In Protection
, only frost protection is active (factory setting = 8˚C), unless your
HVAC installer has adjusted the factory settings.
Changes by installer   Frost protection: ________ ˚C
 Heat protection:
________ ˚C
Change the thermostat to Economy mode
 
The thermostat can be set to Economy mode either via pressing the operating
mode button
if enabled (see parameter P02), or via an external contact such
as window switch, key card switch etc.
If the external contact is activated the thermostat changes from Comfort mode or
Protection to Economy mode. Any operation by the user has no influence.
In Economy mode, the automatic fan control is active.
Note: If the thermostat is configured for manual heating / cooling changeover,
the Economy mode can not be selected via operating mode button
.
Change from heating to cooling mode
/
The changeover between cooling and heating is done either automatically by a
heating / cooling changeover sensor or a remote changeover switch, or manually
by pressing the operating mode button
. If the thermostat is configured for
cooling only or heating only, no changeover is possible (see parameter P01)
Display for automatic changeover or continuous heating/cooling:
Heating valve is open
Cooling valve is open
Display for manual changeover:
Thermostat is in heating mode
Thermostat is in cooling mode
Display
Operation and settings
Automatic fan
Low fan speed
Medium fan speed
High fan speed
Ke
yp
ad locked
Fault indicator *
Condensation in the room*
Cooling demand / mode
Heating demand / mode
Electric heater active
Protection
Comfort
Economy
Measured room temperature,
setpoints and parameters
Symbol when actual room
temperature is displayed
Current time of day or
additional user information
Adjusting fan mode
- Automatic fan ( )
- Manual fan (
)
No fan available on RDU…!
Adjusting operating mode
- Protection ( )
- Comfort (
)
- Economy (
)*
or in a system with manual changeover:
- Protection (
)
- Comfort heating (
)
- Comfort cooling (
)
Colder / Warmer
* if confi
g
ured b
y
y
our HVAC installe
r

Siemens RDF340 Series Specifications

General

Protection Rating	IP30
Type	Room Thermostat
Application	Heating and Cooling systems
Operating Voltage	AC 24 V
Power Consumption	2 VA
Mounting	Wall mounting
Ambient Temperature Range	0 °C to 50 °C
Hysteresis	Adjustable, typically 0.5 K to 2 K

Summary

Understanding the Thermostat Display

Display Elements

Icons and symbols displayed: room temp, setpoints, parameters, actual temp, time of day, user info.

Status Indicators

Indicators for Protection, Comfort, Economy, condensation, cooling/heating demand, electric heater, fan speeds, keypad lock.

Thermostat Operation and Settings

Adjusting Operating Mode

Setting the thermostat to Protection, Comfort, or Economy modes.

Adjusting Fan Mode

Selecting between automatic fan operation or manual fan speed.

Changing Room Temperature

Adjusting the current room temperature setpoint for Comfort mode.

Adjust Fan Speed Fan Mode

Manual selection of fan speed (Low, Medium, High) or Auto mode.

Setting Thermostat to Protection

Activating Protection mode, typically for frost protection.

Changing Thermostat to Economy Mode

Switching to Economy mode via button or external contact.

Changing from Heating to Cooling Mode

Automatic or manual changeover between heating and cooling modes.

Advanced Settings and Features

Button Lock Functionality

Locking or unlocking thermostat buttons via manual or auto lock.

Filter Maintenance Reminder

Message indicating when to clean HVAC equipment filters.

External Fault Alarms

Information on alarm messages (AL1, AL2) indicating external faults.

Control Parameter Adjustment

Procedure for changing key control parameters like sequence, modes, and setpoints.

Recalibrating the Sensor

Adjusting the temperature sensor calibration for accuracy.

Economy Mode Setpoints

Setting heating and cooling setpoints for Economy mode.