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Siemens Building Technologies
HVAC Products
30
Manual operation
Manual operation enables the heating plant to be controlled manually during the com-
missioning phase or in the event of fault. It is activated by pressing the
Then, the LED for manual operation is lit and that for the operating mode extinguishes.
The control outputs will be switched as follows:
• The power supply to the valves on the primary side (heating circuits or common flow)
will be removed. They can be driven to any position by pressing
• The other actuators will be fully closed at 5 times the normal running time and then
deenergized. This means that the controller can no longer drive them (that is, only
manually, if the controller features manual adjustment).
• The heating circuit, d.h.w. and intermediate circuit pump as well as the circulating
pump – if present – will be activated. The PWM output for speed-controlled pumps
delivers the signal for 100 %. The pump speeds on the data buses also are 100 %
The display shows the flow temperature of heating circuit 1 (B1).
During manual operation, the control functions do not act on the control outputs.
Manual operation is deactivated by pressing the
ing mode buttons.
The manual operating state can be ascertained but not changed via LPB. In any case,
a heat demand signal of 95 °C (fixed value) is delivered to the heat source.
Basic documentation RVD240
30 Manual operation
button.
and
button again or any of the operat-
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CE1P2384en
27.05.2004
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