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Siemens Building Technologies
Basic Documentation RVA47.320
CE1P2379E
HVAC Products
Description of the enduser settings
15.07.2002
3.15
Heating curve slope
•
Constant room temperature in spite of outside temperature variations
•
Generation of a flow temperature with no external demand for heat
The controller generates the flow temperature setpoint as a function of the selected
heating curve. For plants where the controllers cannot transmit their demand for heat
via LPB or input H1, the controller can generate a weather-compensated flow
temperature.
1. Press the operating line selection buttons to select line 17.
2. Press the + / - buttons to select the heating curve slope or - - . - einstellen.
Setting range
Unit
Factory setting
- : - - / 2.5...40.0
Increment
15.0
By changing the setting, the slope of the heating curve will be increased or decreased
with the following effects:
Increase:
The flow temperature will be
raised
when the outside temperature
drops
Decrease:
The flow temperature will be
raised less
when the outside
temperature drops
The following settings produce the following effects:
2.5...40.0
The controller delivers a weather-compensated flow temperature.
- - : -
The controller delivers no weather-compensated flow temperature.
To release heat generation, an external heat demand signal is required.
Frost protection for the plant is active, but not frost protection for the
building. The settings and the display on the room unit are also
deactivated.
The setting of the heating curve slope (value from 2.5 to 40 or inactive - - - ) affects the
automatic generation of plant type (operating line 53).
An external demand for heat can be delivered to the controller via LPB (LPB-
compatible controllers) or input H1 (controllers of other manufacture). If several signals
are present, the controller will use the highest of them as the setpoint.
Using the heating curve, the controller generates the flow temperature setpoint,
enabling the system to maintain a constant room temperature even without using a
room temperature sensor.
The steeper the slope of the heating curve, the higher the flow temperature setpoint at
low outside temperatures.
Comfort is considerably enhanced when using a room temperature sensor.
Benefit
Description
Setting
Effect
Notes
The heating curve
Note
