User Manual

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Siemens Modulating refrigerant valves, PN 63 A6V11160433en / A5W00038735
Building Technologies 2018-07-17
Special conditions of safe use for Ex Equipment
The MVL661 *** refrigerating valve are to be connected via cable and corresponding Ex
certified cable glands suitable for this purpose.
The unused inlet openings with predefined breakouts locations shall be closed with
separate "Ex e" sealing plugs.
The degree of protection (solid foreign objects, dust and water protection) according to
IEC / EN 60529, at least IP 65 during installation and operation, is achieved only if the
cable and wiring entries and, if applicable, blanking elements are correctly used.
The refrigerating valves MVL661 *** and MVS661 must be installed in such a way that
it is adequately protected against sunlight or other sources of UV radiation.
Actions must be taken either within or outside of the equipment (cold valve MVL661 ***
and MVS661 ***) which prevent the rated voltage from exceeding transient faults by
more than 40% (transient protection).
In order not to exceed the maximum permissible temperatures on the electronics hous-
ing and the solenoid valve, the valve must be installed lying (horizontal) at 40 ° C
<Tamb <55 ° C and 80 ° C <Tmed <120 ° C.
Due to the risk of electrostatic charging, the appliance may only be cleaned with a
damp cloth.
It is ensure that the refrigerating valve is earthed through the pipe fittings.
At the temperature range of -25 °C ≤ Tamb ≤ -15 °C the electronic enclosure must be
protected against impacts.
Maintenance notes
The refrigerant valve is maintenance-free.
If the valve's interior is subject to considerable wear and tear, you can renew the valve
using valve insert ASR...N. (Mounting instructions 74 319 0486 0). Otherwise, the
valve cannot be repaired.
Simply exchange the connection housing on a defective valve electronics with the re-
placement part ASR61EX.
The replacement electronics include mounting instructions A5W00036611.
Do not plug in or remove the connection housing when connected to power.
A calibration must be triggered after replacing to ensure the electronics are optimally
matched to the valve (See "Calibration", page 5).
The actuator gets hot at operating states at the edge of the application data, but there
is no risk of fire. Maintain a minimum distance to wall, see "Dimensions“, page 13.
II 3G
Cabling and conduits
Cable and conduit
entries
Protection class
Protection against
UV-radiation
Exceeding rated voltage
Environment
Cleaning
Grounding
Housing protection
Valve repair
Replacement
electronics
Warning
Warning