Manual Operation
In the event of a component failure resulting in a shut down due to a false alarm, the failed component can be overridden using the Programming Function on the display. High Pressure, Service Prefilter, System Stalled (airlock), and Salinity Probe Failed can be defeated. The other safety shutdowns will still be activated. The pressure sensors and salinity probe can also be calibrated from the display. Complete instructions are found in Part 2 of this manual under “Programming from the Display”. Be absolutely certain that the alarm is in error before defeat- ing the automatic controls.
•In the event of complete MPC control failure, the system may be operated manually by using the manual run switch on the MPC control box and manually opening the diversion valve.
•For manual start up, switch on the feed pump by setting the feed pump switch to “RUN MAN”. Shut the unit down if the Clark pump does not cycle, if air is continuously present in the intake line or if the feed pump is excessively noisy. The automatic safety controls are disabled in manual mode.
•Always discard the product water for the first few minutes of operation. The initial product water from the system may not be potable. Taste the product water before sending to a tank. To get a water sample loosen the 1/4 inch product tube fitting at either the feed pump mod- ule or the membrane outlet and collect a sample Check it with a handheld salinity meter or taste it.
•The diversion valve, an electrically operated three way valve which is normally energized by the MPC controls to send water to the tank, will not open automatically in manual mode. Instead, it must be opened using the mechanical override button on the valve. The valve is located behind an access opening on the left side of the feed pump module. Push the man- ual override button in and rotate 1/4 turn clockwise to open the valve.
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