Features - Siemens RVA47.320 User Manual

Heating circuit
Heat generation
Protection for the plant
Siemens Building Technologies
HVAC Products
1.2

Features

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