Siemens RVA47.320 - Key Features and Capabilities

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Summary 15.07.2002
1.2 Features
• Heating circuit control with a pump heating circuit
• Remote operation via digital room unit
• Quick setback and boost heating
• Automatic 24-hour heating limit
• Automatic summer / winter changeover
• The building's thermal dynamics are taken into consideration
• Automatic adjustment of the heating curve to the type of building construction and
the heat demand (provided a room unit is connected)
• Overload detection (shifting priority)
• Manual operation
• Cascading with up to 12 modulating heat sources controlled by one controller in
combination with BMUs via LPB
• Cascading with up to 15 modulating heat sources and additional RVA47.320 (from
B-series) via PPS
• Control of mixed cascades (modulating or multistage) with up to 12 heat sources in
combination with RVA43.222 (from C-series) with BMUs via LPB
• Selectable boiler sequence and boiler strategy
• Weather-compensated heating circuit control with or without room influence
• Cascade flow temperature control depending on the heat demand signal from the
heating circuits connected to the system or from controllers outside the system (via
input H1)
• Cascade flow temperature control depending on the temperature demand signal
(DC 0…10 V, input H1)
• Adjustable maximum limitation of temperature demand signals delivered to the
heating boiler
• Performance-related switching on / off of boilers, very accurate flow temperatures
• Supervision of operating conditions at the pressureless header, low return
temperatures
• Protection against boiler overtemperatures (pump overrun)
• Protective boiler startup (acting on the mixing valve)
• Minimum limitation of the boiler return temperature (acting on the mixing valve)
• Adjustable minimum and maximum limitation of boiler temperature (boiler flow
temperature)
• Frost protection for the building, the plant and the boiler
• Frost protection for the d.h.w. storage tank connected directly to the controller
• Pump protection through periodic pump kick
• Overtemperature protection for the pump heating circuit
Heating circuit
Heat generation
Protection for the plant