- 70 -
Quick setback
Line Nr
Programming line
HC1
HC2
780
1080
Quick setback
During quick setback, the heating circuit pump
is deactivated and, in the case of mixing circuits,
the mixing valve is fully closed.
When using a room sensor, the function keeps the
heating off until the room temperature drops to the level
of the "Reduced" or "Frost protection" setpoint.
If the room temperature falls to the reduced or frost
level, the heating circuit pump is activated and the
mixing valve released.
Quick setback switches the heating off for a certain
period of time, depending on the outside temperature
and the building time constant.
Duration of quick setback when "Comfort" setpoint
minus "Reduced" setpoint = 2 K (e.g. "Comfort" setpoint
= 20 °C and "Reduced" setpoint = 18 °C).
Building time constant [h]
Composite outside
5
Temperature
Duration of quick setback [h]
15°C
7.7
10°C
3.3
5°C
2.1
0°C
1.6
-5°C
1.3
-10°C
1.0
-15°C
0.9
-20°C
0.8
Room In
fl
uence
Line Nr
Programming line
HC1
HC2
750
1050
Room infl uence
Control types
When using a room temperature sensor there are
3 diff erent types of control to choose from.
Setting
Control Type
---%
Simple control according to outdoor conditions*
1...99 %
Control according to outdoor conditions with
room infl uence*
100 %
Control according to room temperature only
* Requires the connection of an outdoor sensor.
Simple control according to outdoor conditions
The fl ow temperature is computed via the heating
curve according to the averaged outdoor temperature.
This type of control requires proper adjustment of the
heating curve, as the control does not take the room
temperature into account for this adjustment.
Control according to outdoor conditions with
room infl uence
The diff erence between the room temperature and the
setpoint value is measured and taken into account for
temperature control. This enables taking into account
possible heat inputs and ensures a more even room
temperature.
The infl uence of the diff erence is defi ned as a percentage.
The better the installation in the reference room (accurate
room temperature, correct installation location, etc.)
the higher will be the value that can be set.
Example
Approx 60 % : the reference room is appropriate.
Approx 20 % : the reference room is inappropriate.
Information
Activation of the function requires taking into account
the following requirements:
- A room sensor must be connected.
- The "room infl uence" parameter must be set
between 1 % to 99 %.
The reference room (where the room sensor is installed)
must not contain adjusted thermostatic valves. If present
in the room, these valves must be fully open.
Control according to room temperature only
The fl ow temperature is adjusted according to the room
temperature setpoint, the current room temperature and
its evolution. A slight increase in room temperature, for
example, causes an immediate drop in the fl ow temperature.
Information
Activation of the function requires taking into account
the following requirements:
- A room sensor must be connected.
- The "room infl uence" parameter must be set to 100 %.
The reference room (where the room sensor is installed)
must not contain adjusted thermostatic valves. If present
in the room, these valves must be fully open.
Waterstage / Maintenance Manual / 2105 - EN
