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the second stage can be switched ON and OFF by
pressing button C. In the case of modulating burners,
modulation can be changed by pressing button B
(OPEN) or C (CLOSE) (only with RVL482)
D.h.w. heating (only with RVL481, RVL482):
The pumps used for d.h.w. heating run continuously. If
the d.h.w. plant uses a mixing valve, you can drive it
manually to the required position.
In plants with a changeover valve, d.h.w. heating is not
possible.
Switch manual operation OFF again: Press button
A or select the required operating mode.
The heat source no longer works:
The burner has gone to lockout: Press the reset but-
ton!
The heating circuit pump and / or the boiler pump do
not operate: Check the fuses!
Siemens Building Technologies CE1B2540en 74 319 0616 0 b 18.07.2008 30/32

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This manual is also suitable for:

Rvl481Rvl480Rvl479