Combination With Rvd; Distribution By Heat Exchanger - Siemens Acvatix SAX Series Basic Documentation

Notes
Siemens
Building Technologies
4.1.1 Combination with RVD.. controller for direct domestic
hot water distribution by heat exchanger
The design based slow reaction on control signals of SAX31.., SAX81.., SAV31..
and SAV81.. actuators doesn't allow the actuator to react on very short control
pulses. Only control pulses with a length greater than 400 ms allow a sufficient
reaction.
Especially the direct domestic hot water control does not allow such long control
pulses. The specific optimized control loops – equipped with an SIGMAGYR RVD..
controller and Acvatix SQS359.05 actuator– work with pulses down to 40 ms.
SAX31.. and SAX81.. are not able to work with these short pulses.
The following table gives alternatives which actuators can be used within these
control loops.
Controller Plant
type
RVD130
RVD135/109
RVD135/309
RVD140
RVD144/109
4 und 5
RVD145/109
RVD139
RVD230
RVD235/109
RVD250
RVD255/109
RVD240
x- 4
RVD245/109
RVD260
RVD265/109
.
Actuators SAX.., SAY.., SAV.., SAL.. for valves
Functions and control
Prefered Valve line
actuator
SQS35.03
VVG55..
SAS31.03
SQS359.05
VVG549..
SAT31.008
SQS359.54
VVG549..
SAT31.51
VVG41..
SKD32.21
VVF53..
SKD32.21E
SQS35.03
VVG55..
SAS31.03
SQS359.05
VVG549..
SAT31.008
SQS359.54
VVG549..
SAT31.51
VVG41..
SKD32.21
VVF53..
VVG41..
SKD32.21E
VVF53..
DN kvs
DN15 ..25 0.25 .. 6.3
DN15 ..25 0.25 .. 6.3
DN15 ..25 0.25 .. 6.3
0.63 .. 40
DN15 ..50
0.16 .. 40
0.63 .. 40
DN15 ..50
0.16 .. 40
DN15 ..25 0.25 .. 6.3
DN15 ..25 0.25 .. 6.3
DN15 ..25 0.25 .. 6.3
0.63 .. 40
DN15 ..50
0.16 .. 40
0.63 .. 40
DN15 ..50
0.16 .. 40
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CE1P4040en
2018-12-05