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Siemens Building Technologies
Basic Documentation RVA63.242, RVA53.242
CE1P2373E
Landis & Staefa Division
Summary
26.03.2001
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Frost protection for the house or building, the plant, d.h.w., the heating circuit, and
the boiler
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Protection for the pump and the mixing valve through periodic control (pump and
valve kick)
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Adjustable minimum and maximum limitation of flow temperature
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Protection against overtemperatures in the pump heating circuit
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Two 7-day heating programs
−
7-day heating program no. 1 for heating circuit 1
−
7-day heating program no. 2, selectable for heating circuit 2, or the d.h.w.
circulating pump
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Separate 7-day heating program for d.h.w. heating
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Temperature adjustment with the setpoint knob
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Automatic button for efficient operation throughout the year
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Chimney sweep function at the touch of a button
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Manual operation at the touch of a button
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Straightforward selection of operating mode via buttons
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Change of operating mode with H-contact
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Output and input tests to assist commissioning and a functional test
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Service connection facility for local parameter settings and data logging
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D.h.w. heating with a charging pump or diverting valve
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D.h.w. heating with one or 2 sensors
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Reduced setpoint of d.h.w. temperature
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Selectable d.h.w. program
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Integrated legionella function
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Selectable priority for d.h.w. heating
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Adjustable boost of the d.h.w. charging temperature
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Automatic d.h.w. push
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D.h.w. demand with a sensor or thermostat
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Protection against discharging
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D.h.w. heating: with solar heat
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D.h.w. circulating pump
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Electrical immersion heater
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Communicating via Local Process Bus (LPB)
1)
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Communicating via point-to-point interface (PPS)
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Integrity of system architecture with all RVA... controllers
1)
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Can be extended to include up to 40 heating circuits (with central bus power
supply)
1)
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Optional remote supervision
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Fault status signals and indications (locally, LPB and PPS)
1)
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Controllers of other manufacture can deliver their heat demand signal via potential-
free H-contact
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Controllers of other manufacture can deliver their heat demand via DC 0…10 signal
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Analysis with service tool
1)
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Logging the number of burner hours run of stages 1 and 2
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Logging the number of burner starts of stages 1 and 2
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Logging the flue gas temperature
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Display of plant diagram no.
1)
Not with RVA53.242
Operation
D.h.w.
Use in extensive
systems
Logging