Bedienungsanleitung Siemens RDF600KN (Seite 12 von 82) (Englisch)

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Siemens RDF301, RDF301.50, RDF600KN Basic documentation CE1P3171en

Building Technologies Functions 2012-10-04

3. Functions

3.1 Temperature control

Setting of the control parameters (P01, etc., mentioned throughout the document)

is described in section 3.13.

The thermost

at acquires the room temperature via built-in sensor, external room

temperature sensor (QAA32), or external return air temperature sensor (QAH11.1),

and maintains the setpoint by delivering actuator control commands to heating

and/or cooling equipment. The following control outputs are available:

 ON/OFF control (2-position)

 Modulating PI/P control with 3-position control output (only for 2-pipe

applications)

The switching differential or proportional band is 2 K for heating mode and 1 K for

cooling mode (adjustable via parameters P30 and P31).

The integral action time for modulating PI control is 5 minutes (RDF301...) and 45

minutes (RDF600KN), adjustable via parameter P35.

The display shows the acquired room temperature or the Comfort setpoint, selecta-

ble via parameter P06. The factory setting displays the current room temperature.

Use parameter P04 to change the room temperature display from °C to °F as

needed.

The acquired room temperature (internal or external sensor) is also available as

information on the bus.

 With automatic changeover or continuous heating / cooling, symbols

indicate that the system currently heats or cools (heating or cooling output is

activated).

 With manual changeover (P01 = 2), symbols

/ indicate that the system

currently operates in heating or cooling mode. Thus, the symbols are displayed

even when the thermostat operates in the neutral zone.

Concurrent display of the current temperature or setpoint in °C and °F (parameter

P07 = 1) is possible on the thermostats.

The outside temperature can be displayed on the room thermostat by setting

parameter P07 = 2. This temperature value has only information character.

In LTE mode, the outside temperature can only be received on outside temperature

zone 31.

In S-mode, the corresponding communication object needs to be bound with a

KNX sensor device.

Time of day via bus can be displayed on the room thermostat by setting parameter

P07 = 3 or 4. The display format is either in 12- or in 24-hour format.

The information can be received from a Synco controller with time master

functionality or any other KNX device if the corresponding communication object is

bound.

When an application program is downloaded to the Synco devices via ETS, the

correct group addresses need to be downloaded as well to display the time of day

on the room thermostat. (see Synco Knowledge Base - KB771)

General note:

Parameters

Temperature control

Display

KNX

Room temperature

Concurrent display of

°C and °F

KNX

Outside temperature via

bus

KNX

Time of day via bus

Note

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