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I would appreciate it if an expert could give some advice on the image below

2018-09-22View Original

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I really can’t understand it; please ask an expert for guidance
Reply #22018-09-23
It feels like manual selection control (or override control? ), HS selects different positions to input various coefficients (K); what follows is the control curve of the control valve?
Reply #32018-09-24
There is a selector switch; its function is likely to allow I1 for normal control, while I2 keeps the valve position at 15%.

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