Siemens RVA53.242 - 5.26 Control mode of actuator

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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of OEM settings 26.03.2001
5.26 Control mode of actuator
Use of 2- or 3-position mixing valve actuators.
By selecting the control mode, the control is matched to the type of mixing valve
actuator used in the mixing heating circuit.
Setting range Unit Factory setting
0 / 1 – 1
0 2-position control
1 3-position control
2-position control delivers on / off output signals that allow the motorized mixing valve
to open and close.
For adequate control, a switching differential is required. When using a 2-position
actuator, it is therefore important that the switching differential be matched to the type
of plant. Also refer to "switching differential of actuator" in Index (setting line 36
OEM
).
3-position control delivers output signals that allow the actuator to open, close or stop in
any position.
With this control mode, the switching differential need not be adjusted since the 3-
position actuator can stop in any position.
Benefit
Description
Setting
2-position control
3-position control