7. Operation
7.1 Start Up Checklist
After priming the CDR there are a few things to inspect before running the machine. MP
Systems recommends running the system with the manual start (#9) and stop (#0) buttons
when first turning the system on.
1. Motor Rotation
– The pump in the CDR Series must run clockwise from back
side. Backwards rotation will not only be noisy but will have very poor performance and
the system will not function correctly. Using a flashlight, inspect the fan rotation on the
back side of the motor. Fan should be spinning clockwise.
2. Inlet Pressure
– Allow the system roughly 30 seconds to fully build and stabilize
pressure. Check the inlet pressure gauge located on the side of the bottom manifold on
the filters. Gauge should read between 18-25 PSI when operating correctly. 22PSI is an
average pressure for the 4-filter system. The pressure is also displayed on the HMI
screen but should always be checked against gauge pressure to ensure accuracy.
3. Return Pressure
– Again, allow the system roughly 30 seconds to stabilize. Check the
outlet pressure gauge located on the side of the top manifold of the filters. Pressure
should be between 4-8 PSI. Outlet pressure should always be close to atmospheric
pressure, with just a bit of back pressure to eliminate the syphoning effect caused by the
outlet hose height, ensuring that air is not pulled into the system and returning to tank.
4. Filter Discharge
– The apex of the filters all have a plastic “skirt” to direct flow
downwards. There should always be a steady low pressure ring of fluid discharging
around the circumference of the bottom of skirt. If one of more of the discharge skirts
does not have a steady flow around the perimeter, this usually indicates low pressure/flow
through the system on startup, or a plugged apex if the system has been running for a
while. Refer to maintenance section for information on how to clean apex.
5. Overflow Hose
– Ensure that the settling tank overflow hose and dip tube in machine
tank are lower than the settling tank overflow port. This overflow return flow relies on the
settling tank overflow port being higher than the machine tank coolant level. Air may
become trapped in this house upon startup. If this occurs and the CDR alarms out due to
the tank float, check to make sure that the hose is running along the floor and not higher
than the overflow port, and make sure the dip tube connection and machine tank fluid level
are lower than the port as well. Usually removing the air can be resolved quickly by letting
the system turn off and fluid levels settle, then restarting the system and allowing the air
pockets to work their way out.
6. Tank Circulation - Ensure proper circulation of tank flow from return dip tube back to
inlet dip tube. Cyclonic filtration works based on the idea that it constantly circulates and
