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In the event of complete MPC control failure, the system may be operated manually using
the switch on the feed pump module.
• For manual start up, set the switch to “Manual”. Shut the unit down if the Clark Pump does
not cycle. In manual operation, the salinity control is inoperative and the diversion valve
will not operate. Instead, product water must be taken directly from the membrane product
water outlet. The automatic safety controls are disabled in manual mode.
• Bypass the diversion valve as follows:
• Disconnect the 1/4 inch tube “A” that runs between the membrane product outlet and
the RotoFlow meter at the membrane outlet fitting. Product water will run out of the
fitting.
• Taste the product water before sending it to a tank. Always discard the product water
for the first few minutes of operation. The initial product water from the system may not
be potable.
• Disconnect the product-to-tank tube from the diversion valve manifold outlet and con-
nect it to the membrane product outlet fitting.
• To shut down manually, set the switch “Auto” .
• If the system is to be left idle for more than a day it should be given a fresh water flush. To
manually flush, collect 3 gallons of product water in a bucket. Connect the service hose to
the service connection on the pump module. Place the service valve in “SERVICE” posi-
tion and start the feed pump with the manual switch. Run the feed pump until the bucket is
empty and turn the service valve back to “RUN”.
Manual Operation
Tube “A”
Tube to tank
Membrane
product outlet
Automatic
Operation
Manual
Operation
Tube “A”
Tube to tank
Diversion valve
manifold outlet
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 shutdown will still be activated. The pressure sensors and salinity probe can also be cali-
brated 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.