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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
19


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