Siemens Acvatix SAS Series Basic Documentation page 30

Notes
30 / 60
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4.1.1 Combination with RVD.. controllers for direct domestic
hot water distribution by heat exchanger
The design based slow reaction on control signals of SAS31.., SAS81.. and
SAT31.. actuators doesn't allow the actuator to react on very short control pulses.
Only control pulses of a sufficient length (ca. >50 ms for SAS31.53, SAS81.33 and
SAT31..; ca. >300 ms for the remaining SAS31.. and SAS81.. types), allow for a
sufficient reaction.
Especially the direct domestic hot water control does not allow such long control
pulses.
The specific optimized control loops – e.g. equipped with an SIGMAGYR RVD..
controller and SQS359.05 actuator
Some of the actuators mentioned above are not able to work with these short
pulses.
The following table shows which actuators can be used for those special
applications.
Controller Plant type
1)
RVD130
1)
RVD1357109
1)
RVD135/309
RVD140 4 und 5
RVD144/109
RVD145/109
1)
RVD139
1)
RVD230
1)
RVD235/109
RVD250
RVD255/109
.. - 4
1)
RVD240
1)
RVD245/109
RVD260
RVD265/109
1)
No longer available.
Actuators SAS.., SAT.. for valves
Functions and control
1)
– work with pulses down to 40 ms.
Preferred actuator Valve line
1)
SQS35.53
VVG44..
SAS31.53
1)
SQS259.53
SAT31.008
VVG549..
1)
SQS259.43
SAT31.51
VVG41..
SKD32.21..
VVF53..
1)
SQS35.53
VVG44..
SAS31.53
1)
SQS259.53
SAT31.008
VVG549..
1)
SQS259.43
SAT31.51
VVG41..
SKD32.21..
VVF53..
DN k
vs
DN 15...40 0.25...25
DN 15...25 0.25...6,3
0.63...40
DN 15...50
0.16...40
DN 15...40 0.25...25
DN 15...25 0.25...6,3
0.63...40
DN 15...50
0.16...40
CE1P4041en
2019-04-09