Data Sheet for Product

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Siemens Control device PN25, safety function to DIN EN 14597 CE1N4387en
Building Technologies 2020-04-29
Engineering notes
We recommend installation in the return pipe, as the temperatures in this
pipe are lower for applications in heating systems, which in turn, extends
the stem sealing gland's life.
In open circuits the valve plug may seize as the result of scale deposits. We
recommend that the valve should be exercised at regular intervals (two to
three times per week).
A strainer MUST be fitted at the valve inlet
Ensure cavitation free flow (refer to page 10).
To ensure the reliability of the valve, we recommend the fitting of a strainer
at the valve inlet even in closed circuits.
Conduct the electrical connections in accordance with local regulations on
electrical installations as well as the internal or connection diagrams on
page 21.
Safety regulations and restrictions designed to ensure the safety of
people and property must be observed at all times!
Observe admissible temperatures, refer to «Use» on page 1 and
«Technical data» on page 17.
If an auxiliary switch is required, its switching point should be indicated on
the plant schematic.
Every actuator must be driven by a dedicated controller (refer to
«Connection diagrams», page 21).
Mounting notes
Valve and actuator are preassembled and must be mounted and installed
as a whole unit.
The control device is preset to 50% stroke for flushing and pressure testing
of the plant.
Attention: When removing anti-tamper screws approval for the safety
function to DIN EN 14597 ceases!
Mounting and installation instructions are by packed in the control device
packing.
Control device Installation instruction
MKD.... – 74 319 0914 0
MK..563.. – 74 319 0326 0
The instructions for accessories are enclosed with the accessories
themselves.
Accessories Installation instructions Accessories Mounting instructions
ASC1.6 G4563.3 4 319 5544 0 ASZ7.3 – 74 319 0247 0
ASC9.3 G4561.3 4 319 5545 0
Caution