Bedienungsanleitung Siemens RVP201 (Seite 19 von 46) (Englisch)

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Siemens Heating controllers RVP201 and RVP211 CE1P2464en

Building Technologies 3 Technical design 12.12.2007

3.3.6 Control

Prerequisites for this type of control

• Outside sensor connected

• No room unit connected, or

• Room authority set to 0 % or to Off if a room unit is connected

The compensating variable used for weather-compensated control is the composite

outside temperature. Assignment of the flow temperature setpoint to the compensating

variable is made via the selected heating curve. The room temperature is not taken into

consideration. This type of control is used primarily in plants or buildings where

• several rooms are occupied at the same time

• no room is suited as a reference room for the room temperature

Prerequisites for this type of control:

• Room unit connected

• No outside sensor connected, or

• Room authority set to 100 % if an outside sensor is connected

If no outside sensor is connected, the setting potentiometer for the room authority is

inactive.

The compensating variable used for room temperature-compensated control is the

setpoint / actual value deviation of the room temperature. The room authority is gener-

ated based on this deviation. Also, an outside temperature of 0 °C is assumed and

taken into account when generating the setpoint.

• When there is no temperature deviation in the room, the controller maintains the flow

temperature setpoint resulting from

− 0 °C outside temperature, and

− the selected heating curve slope

• Any room temperature deviation produces an instant parallel displacement of the se-

lected heating curve. The correlation between the extent of temperature deviation and

the degree of displacement is defined by the room authority, which is dependent on

− the setpoint / actual value deviation of the room temperature

− the selected heating curve slope

The purpose of room influence is to enable the controller to exactly reach and maintain

the respective setpoint.

This type of control provides PI control during the control process, the I-part ensures

that the required room temperature will be reached and maintained with no offset. .

This type of control is used primarily in plants or buildings where a room is suited as a

reference room for the room temperature.

Prerequisites for this type of control:

• Outside sensor connected

• Room unit connected

• Room authority set in the range 0…100 %

The compensating variables used for weather-compensated control with room influence

are:

• The composite outside temperature

• The setpoint / actual value deviation of the room temperature

The setpoint of the flow temperature is continuously shifted in function of the composite

outside temperature (via the heating curve). Also, any room temperature deviation pro-

duces an instant parallel displacement of the heating curve. The correlation between

the extent of the temperature deviation and the degree of displacement is defined by

the room authority, which is dependent on

• the selected authority

• the setpoint / actual value deviation of the room temperature

• the selected heating curve slope

Weather-compensated

control

Room temperature-

compensated control

Weather-compensated

control with room

influence

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