FASTERHOLT FM4900H, User Manual

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Combining the various constants:
The machine will always be able to run with the factory-set constants. However, there will be different conditions from farm to farm and from
machine to machine. Many requests can be met by changing the constants.
1. Slow start-up of turbine. Set machine data no. 13 initially to approx. 2-4.
This causes the speed regulator valve to close only about halfway, after which continued closing is performed in steps until the rewind speed
reaches the set speed. The valve can then be fine-tuned to close first to the point where the turbine starts running and then to close in steps until
the set speed is achieved.
2. Slow opening of inlet. Set machine data no. 17 to 1.
Opening for the water is then performed in steps.
3. Only one motor for speed regulation, set machine data no. 12 to 0.
Post-irrigation starts once the turbine stops, when the magnet at the stop sensor is affected. After the post-irrigation time has elapsed, the machine
will restart and move to the mechanical stop.
4. Start up no. 2 machine when no. 1 stops. Set machine data no. 12 to 0.
With a pressostat installed on both machines, set the pressostats between the machine's operating pressure and the pump pressostat's stop
pressure. For example, the operating pressure may be 6 bar and the pump stop 9 bar. Set the pressostats on the machines to 7.5 bar. No. 2 machine
will then start up when the slow closing of the first machine reaches the point where the pressure in the ground line reaches 7.5 bar. Be aware that if
the height difference of the fields is too great, the required pressure differentials that the pressostat must be set to may be too great.
5. The machine should stop due to low pressure and with a pressostat installed.
Set constant no. 6 to 1 and set machine data no. 12 to 2.
This means that the stop valve opens instead of closing if the line connection to the stop valve is the same.
After 2 minutes, close it again, otherwise you will not be able to obtain pressure at start-up. When machine data 12 is set to 2, the valve can only be
opened with the stop sensor, stop button and monitoring. But not when the pressostat is switched off.