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Siemens Building Technologies
Basic Documentation QAA73.110 Room unit
CE1P2284en
HVAC Products
Description
of enduser settings
10.07.2002
3
Description of enduser settings
User interface
3.1 Heating circuit operating modes
The control provides 3 different heating circuit operating modes that can be directly
selected as required.
The operating modes are selected by pressing the heating circuit operating mode
button. It can be accessed after opening the cover.
The selected heating circuit operating mode applies to both heating circuits and is
indicated on the display by a pointer under the relevant symbol.
Operating
mode
Designation
Effect of selected operating mode
Automatic
operation
•
Heating circuit 1 according to time switch program 1
•
Heating circuit 2 according to time switch program 2
•
Holiday function is active
Continuous
operation
•
Heating circuits 1 and 2 continuously according to
the adjusted nominal room temperature setpoint or
reduced setpoint
•
Holiday function is not active
Standby
•
Heating circuits 1 and 2 are switched off
•
Holiday function is not active
•
Frost protection functions are active
3.2 Operating mode of d.h.w. heating
D.h.w. heating can be switched on and off independent of the other operating modes.
D.h.w. heating ON is indicated by a pointer under the d.h.w. symbol
.
No pointer
OFF
Complete pointer
ON
Half the pointer
ON with ECO function
è
This operating mode must be enabled on setting line 93!
OFF
D.h.w. is not being heated.
ON
D.h.w. heating is switched on; a setpoint is generated based on the
demand for heat and the settings and passed on to the BMU.
ON ECO
D.h.w. operating mode for plants with instantaneous d.h.w. heating.
The setpoint is generated and passed on to the BMU. Die Temperatur
wird jedoch durch die Kesselregelung nicht ständig auf dem Sollwert
gehalten. D.h.w. heating is started only when d.h.w. is consumed.
•
The d.h.w. operating mode and the different d.h.w. functions are active only if
supported by boiler control and if communicated in OpenTherm Plus mode
•
No d.h.w. functions are provided in OpenTherm Lite mode, that is, the d.h.w.
operating mode button is inactive
Description
Operating modes
,
,
Effect
Description
Effect
Notes