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Siemens Heating and D.h.w. Controller RVL481 CE1P2541en
Building Technologies 3 Fundamentals 20.05.2008
3.6 Manual operation
The RVL481 can be switched to manual operation. In this case, the control will be
switched off. In manual operation, the various actuating devices behave as follows:
• Heating circuit mixing valve: This mixing valve is not under voltage, but can be manu-
ally driven to any position by pressing the manual buttons
/ (close) and
/ (open). The heating circuit pump / circulating pump is continuously running.
• Boiler: The 2 burner stages are continuously on. The manual button
/ can be used
to switch the second stage on and off. Pump M1 is continuously running
• Charging pump: The charging pump is continuously running
• Collector pump: The collector pump is continuously running
• Changeover valve: The changeover valve is always in the ”Heating circuit” position
• D.h.w. slipper / seat valve: This valve is driven to the fully closed position, in which
case the closing time is five times the set running time. Then, it is deactivated
• Circulating pump M4: Continuously running
• Electric immersion heater K6: Continuously released
• Multifunctional relay: Continuously energized
Manual operation also negates any overriding of the controller's operating mode (bridg-
ing of H1–M).
3.7 Plant type and operating mode
Depending on the selected type of plant, the following operating modes are available:
Plant type
1–0 YES YES YES YES NO YES
1–1, 1–2, 1–4, 1–5 YES YES YES YES YES YES
2–0 YES YES YES YES NO YES
2–1, 2–2, 2–3, 2–5 YES YES YES YES YES YES
3–0 YES YES YES YES NO YES
3–1, 3–2, 3–3, 3–4, 3–5 YES YES YES YES YES YES
4–0 YES NO NO NO NO YES
4–1, 4–2, 4–5 YES NO NO NO YES YES
5–0 YES NO NO * NO YES
5–1, 5–2, 5–4, 5–5 YES NO NO * YES YES
6–0 YES NO NO NO NO YES
6–1, 6–2, 6–5 YES NO NO NO YES YES
* Depending on the boiler's operating mode:
– Boiler with automatic shutdown: NO
– Boiler with manual shutdown: YES
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