Operation of the control unit
11
Control 8313 – 6720859552 (2017/03)
3.7.3 Manual operation, emergency operation
WARNING:
Risk of scalding from hot water!
Setting the set temperature > 60 °C creates a risk of scalding.
▶ Do not draw off DHW unmixed.
Manual operation key
Press the key to ensure the “Manual operation” operating mode is
available, if e.g. the user interface has failed or the internal control unit
communication has been disrupted. The heat source heats continuously
without setback at a boiler temperature of 60 °C. The pumps and mixers
of the heating circuits, the DHW heating of the central module and the
function modules continue running normally. The LED status display
lights up yellow.
Manual operation
The “manual operation” operating mode can be set and adjusted for
every function separately.
Emergency mode
The “emergency operation” mode is activated automatically if the user
interface is faulty or if communication with the control unit via the
internal BUS is interrupted.
In the “emergency operation” mode, the heat source heats continuously
without setback at a boiler temperature of 60 °C. All pumps connected to
the central module (boiler circulation pump, pump of heating circuit 00,
DHW pump and DHW circulation pump) are switched on.
The SR mixing valve is de-energised and must be adjusted manually if
necessary. The installed function modules cannot be triggered by the
BCT531 user interface and do not work.
The LED status display lights up red in the “emergency operation ”mode.
3.8 Setting the date and time
To set the date or time:
▶ Tap time ( Figure 4, [9], page 7).
▶ Set the date or time.
▶Save.
3.9 Information menu
To display information about the installation or the system:
▶ Tap symbol.
▶ Tap the required area in the Info menu.
Fig. 16 Overview of Info menu
Depending on the area, the following information is e.g. displayed:
• Statuses of safety equipment
• Temperatures
• Operating modes
• Hours run
3.10 Temperature settings
3.10.1 Operating modes
Individual temperatures and changeover criteria can be set for each of
the operating modes ( Fig. 18, [2], page 12) and advanced functions
( Fig. 17, [6]). The adjustments can be made separately for each
heating circuit and each operating mode.
The following settings are available:
• Automatic heating mode
• Automatic setback mode
• Manual heating mode ( Fig. 17, [2])
• Manual setback mode ( Fig. 17, [4])
• Holiday ( Fig. 17, [7])
Fig. 17 Views of operating modes
A Display in the service menu
B Display as heating circuit
[1] Manual operation
[2] Manual heating mode
[3] Auto
[4] Manual setback mode
[5] Off
[6] Advanced functions
[7] Holiday
Automatic heating mode
The Automatic heating mode is predefined via the parameters in the
service menu. The parameters can be changed in the time program
( Fig. 18, [4], [5], page 12).
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