105/118
Siemens
Heating and D.h.w. Controller RVL481
CE1P2541en
Building Technologies
29 Handling
20.05.2008
The Operating Instructions are inserted in a holder at the rear of the cover. When in
their proper place, the list of operating lines that can be selected by the enduser is
visible.
The Operating Instructions are designed for use by janitors and endusers. They also
contain tips on energy savings and troubleshooting.
29.1.2 Analog operating elements
For the selection of the operating mode, there are 4 buttons available. Each button has
an LED integrated; the currently active operating mode is indicated by the respective
LED.
A button is used to switch d.h.w. heating on and off. By pressing the respective button,
d.h.w. heating is switched on or off. The button is lit when d.h.w. heating is switched on.
Manual d.h.w. charging is also triggered by pressing the same button.
For direct setting of the heating curve, the little bar is used, which has proved its worth
over many years. The slider on the left is used to set the required flow temperature at
an outside temperature of 15 °C, the slider on the right to set it at
−
5 °C.
The link between the 2 sliders represents the heating curve.
The heating curve can also be set via operating lines. In that case, the position of the
little bar is of no importance.
A knob is used for, making manual room temperature readjustments. Its scale gives the
room temperature change in °C.
By turning the knob, the heating curve is displaced parallel (functionally), but the bar
maintains its position.
3 buttons are used for manual operation:
•
One button for the activation of manual operation. An LED indicates manual operation.
Manual operation is quit by pressing the same button again or by pressing any at the
operating mode buttons
•
2 buttons for manual positioning commands.
In plants using mixing valves, the regulating unit can be driven to any position by
pressing the respective button .
In plants with direct burner control, burner stage 2 can be switched on and off by
pressing button .
When pressing a button, the associated LED is lit.
The LEDs by the symbols and indicate the positioning commands:
/ = mixing valve in heating circuit fully OPEN or first burner stage ON
/ = mixing valve in heating circuit fully CLOSED or second burner stage ON
The LED beside the pump symbol
is lit as soon heating circuit pump / circulating
pump M1 runs, that is, whenever the heating operates.
29.1.3 Digital operating elements
The entry and readjustment of all setting parameters, the activation of optional func-
tions and the reading of actual values and statuses are based on the operating line
principle. An operating line with an associated number is assigned to each parameter,
each actual value and each optional function.
The selection of an operating line and readjustment of the display is always made with
a pair of buttons.
Operating instructions
Buttons for selecting
the heating circuit's
operating mode
D.h.w. button
Heating curve
Knob for room tempera-
ture readjustments
Buttons and displays for
manual operation
Display of positioning
commands
Display
"Heating operates"
Operating line principle
