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Siemens Building Technologies
Basic Documentation RVA47.320
CE1P2379E
HVAC Products
Description of the enduser settings
15.07.2002
Operating
mode
Effect of knob adjustment
Adjustment
acts on the heating periods
Adjustment acts continuously
Adjustment has no effect
The adjustment made with the setpoint knob has priority over the reduced room
temperature setpoint entered (line 14). Especially in a situation when the adjustment
made with the knob is lower.
During the heating periods, the nominal room temperature setpoint is maintained. The
heating periods are in accordance with the settings made on lines 6 to 11.
0 2 4 6 8 10 12 14 16 18 20 22 24 h
Mo
...
So
2373Z11
When using a room unit without setpoint readjustment (QAA50), the setpoint knob on
the controller acts as described above.
When using a room unit featuring setpoint readjustment (QAA70), the setpoint knob on
the controller is inactive. In that case, the nominal setpoint adjusted on the room unit
applies.
A connected room unit is active only when operating mode
is selected on the
controller.
3.4 Manual
operation
•
Partly manual heating operation
In operating mode “Manual operation”, the plant components on the consumer side
must be manually adjusted and monitored. The control functions of the unit are only
used for controlling the BMUs.
The BMUs are released and use their boiler temperature sensor to control the
temperature at the level of the maximum limitation of the BMU setpoint (TKmax.)
Factory setting 80 °C. The actual boiler temperatures are displayed on setting line 55.
Activation:
Manual operation is activated by pressing this button. It is accessible
only when the cover of the controller is open
Deactivation:
•
By pressing one of the operating mode buttons
•
By pressing again the manual operation button
When deactivating the function, the controller will automatically return to the operating
mode previously selected.
As soon as manual operation is selected, all relays will switch to the following statuses:
Note
Example
Room unit
Benefit
Description
Common flow temperature
Setting
Note
Effect
