Global Valves - BELIMO - #25

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ENG-93001-93621-08.04-1M • Printed in Switzerland • ZSD • Subject to technical modifications BC 25 Arrangement of the operating controls, functional description Under the cover of the actuator are the terminals for connecting the lead, the S1, S2 and S3 control devices and the H1 LED indicator. By setting slide switch S3 or pressing pushbuttons S1 and S2, it is possible to configure the actuator very simply on site to suit actual requirements if changes are necessary from the factory settings. S3.1 1 ON 1 2 ON 2 S3.2 Symbol Symbol 1 2 3 4 5 M ON S3 1 2 H1 S1 S2 H Y H Y ~+ Y/Z Y2 U/MP T– Functional description Function Description Switch Symbol Bold type in the table means standard factory setting (valvespecific). Test The valve effects full stroke with maximum running time and checks the adapted stroke to determine whether the two end-points (H = 0% and H = 100%) are reached. Press S1 Init (adaptation) The possible stroke effected (between the two mechanical end stops of the valve) is detected as 100% stroke and stored in the microprocessor. The control signal and the running time are then matched to this 100% stroke. Press S2 Dir. of stroke Direction of stroke relative to the control signal S3.1 Symbol Consequence Direct 0% control signal corresponds to 0% position feedback. (The actuator spindle is extended or retracted according to the selected closing point.) OFF H Y U5 Y Inverted 0% control signal corresponds to 100% position feedback. (The actuator spindle is extended or retracted according to the selected closing point.) ON H Y U5 Y Valve closing point Closing point with actuator spindle extended or retracted. The valve control path has zero fl ow. S3.2 Symbol Consequence Up The actuator spindle is retracted into the actuator and the valve stem is extended from the fi tting. The position feedback indicates 0% if the stroke direction is "direct". Default setting for H4..B-, H5..B-, H6..N- and H7..N valves. OFF Ä U5 = 0% U5 = 100% 1) Down The actuator spindle is extended from the actuator and the valve stem is retracted into the fi tting. The position feedback indicates 0% if the stroke direction is "direct". Default setting for H6..S valves. ON �Þ U5 = 100% U5 = 0% 1) Only authorized and trained persons are allowed to change the settings of slide switch S3 and pushbutton S2. 1) The electrical closing point is either identical to the deenergized position of the actuator spindle or the opposite of this position, depending on the selected emergency control function type (NVF24-MFT-T or NVF24-MFT-E-T). The actuator type is selected according to the valve design and the required NO (valve open when deenergized) or NC (valve closed when deenergized) function. LED indicator H1 Green steady light Actuator working properly Green flashing light Test run or adaptation with synchronization in progress Red steady light Fault 1) Red flashing light After power interruption (> 2 s). The valve is automatically synchronized at the selected closing point the next time it closes. The LED indicator changes from a red flashing light to a green steady light. Alternating red / green flashing light Addressing via the control system and operation of the adaptation pushbutton S2 in progress The actuator is maintenance-free. The twin-color LED indicator shows the actual actuator status. It also allows simple commissioning if the factory settings need to be changed. 1) Possible causes: Actuator installed incorrectly; valve stem blocked; no valve installed. The adaptation must be repeated by pressing pushbutton S2 after all the above causes have been checked and rectified. Arrangement of the operating controls on the NV../AV.. multifunctional