Operating Modes; Automatic Mode; Continuous Reduced Heating; Continuous Normal Heating - Siemens RVL470 Basic Documentation

3.4. Operating modes

3.4.1. Automatic mode

3.4.2. Continuous REDUCED heating

3.4.3. Continuous NORMAL heating

3.4.4. Standby

3.4.5. Manual operation

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The block diagram shows
•
the function blocks assigned to the three operational levels
•
the function blocks activated with the different plant types
The operating mode is selected on the controller by pressing the respective button.
Also, the operating mode can be changed by bridging terminals H1–M.
•
Automatic changeover from NORMAL to REDUCED temperature, and vice versa,
according to the entered weekly program
•
Automatic changeover to holiday mode, and back, according to the entered holiday
schedule
•
Demand-dependent switching of the heating system in function of the room and out-
side temperature while giving consideration to the building's thermal inertia (ECO
function)
•
Remote operation from a room unit (optional)
•
Frost protection is assured
•
Continuous heating to the REDUCED temperature
•
With ECO function
•
No holiday mode
•
Remote operation from a room unit not possible
•
Frost protection is assured
•
Continuous heating to NORMAL temperature
•
No ECO function
•
No holiday mode
•
Remote operation from a room unit not possible
•
Frost protection is assured
•
Heating is switched off, but is ready to operate
•
Frost protection is assured
The RVL470 can be switched to manual operation. In that case, the control will be
switched off.
In manual operation, the various regulating units behave as follows:
•
Heating circuit slipper valve / seat valve: this mixing valve is not under voltage, but
can be manually driven to any position by pressing the manual buttons
ing, = opening).
The heating circuit pump/circulating pump M1 is continuously running.
•
Boiler: the two burner stages are continuously on. The manual button
to switch the second stage on and off.
The heating circuit pump/circulating pump M1 is continuously running.
Manual operation also negates any overriding of the controller's operating mode (bridg-
ing H1–M).
Basic Documentation RVL470
Fundamentals
( = clos-
can be used
Siemens Building Technologies
Landis & Staefa Division