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Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.4 Heating circuit operating modes
The heating circuit operating mode is selected on the controller by pressing the respec-
tive button. Also, the operating mode can be changed by bridging terminals H1-M.
3.4.1 Automatic operation
• Automatic changeover from NORMAL to REDUCED temperature, and vice versa,
according to the 7-day program entered
• Automatic changeover to holiday mode, and back, according to the holiday schedule
entered
• Demand-dependent switching of the heating system according to the room and outside
temperature while giving consideration to the building’s thermal inertia (ECO function)
• Remote operation via room unit (optional)
• Frost protection is ensured
3.4.2 Continuously REDUCED heating
• Continuous heating to the REDUCED temperature
• With ECO function
• No holiday mode
• Remote operation from a room unit not possible
• Frost protection is ensured
3.4.3 Continuously NORMAL heating
• Continuous heating to NORMAL temperature
• No ECO function
• No holiday mode
• Remote operation via room unit not possible
• Frost protection is ensured
3.4.4 STANDBY
• Heating is switched off, but is ready to operate
• Frost protection is ensured
3.5 D.h.w. operating modes
D.h.w. heating is switched on and off by pressing the respective button:
• ON (button
is lit): D.h.w. heating takes place independent of the heating circuit’s
operating mode and control. D.h.w. heating to the NORMAL or REDUCED setpoint
can be provided as follows:
− According to the entered switching program 2
− According to the entered heating circuit program (–1 h)
− Continuously (24 hours a day)
During the entered holiday period, d.h.w. heating and the circulating pump are deac-
tivated when using controllers with no bus connection (with data bus, depending on
the setting made).
• OFF (button
dark): No d.h.w. heating. Frost protection is ensured (with the excep-
tion of plant types x–4 and x–5)
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