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Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products 1 Summary 27.05.2004
For the control of the primary return temperatures (B7, B71, B72), it is also possible to
use commercially available sensors with Pt 500 sensing elements.
• For the outside temperature:
− Outside sensor QAC22 (sensing element LG-Ni 1000)
− Outside sensor QAC32 (sensing element NTC 575)
• For the room temperature:
PPS-compatible sensors must be used. The following types are available:
− Room temperature sensor QAA10
• For the storage tank temperature:
− Cable temperature sensor QAP21.3
− Immersion temperature sensors QAE2…
1.3.2 Suitable room units
• Room unit QAW50
• Room unit QAW70
1.3.3 Suitable valve actuators
All types of actuators from Siemens with the following features can be used:
• Electric or electrohydraulic actuators with a running time of 10…900 seconds
• 3-position control
• Operating voltage AC 24… 230 V
1.3.4 Communication
Communication with other devices, controllers, etc., is possible:
• Via LPB, e.g. assignment of d.h.w., reception of radio signal, master / slave assign-
ments for the time switch, reception of heat demand signals (RVD230 used as a pri-
mary controller, reception of outside temperature signal)
• Via M-bus, e.g. reading setpoints and actual values, or output control for space heating
1.3.5 Documentation
Type of documentation Classification number
Data Sheet RVD230 N2383
Operating Instructions RVD230 B2381
Installation Instructions RVD230 G2381
Data Sheet QAW50 N1635
Data Sheet QAW70 N1637
Installation Instructions QAW70 G1637
Data Sheet QAA10 N1725
Data Sheet "LPB Basic System Data" N2030
Data Sheet "LPB Basic Engineering Data" N2032
Basic Documentation M-bus P5361
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