Corporate
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Overview
The PurWater Reclaim System 3.0 is controlled by a Programmable Logic Controller
known as a PLC that is coupled with two extensions. The PLC and the two extensions
have a series of input connections located on the top of the devices that receive signals
from various components on the machine. Based on the internal programming and the
inputs being received, the PLC directs output signals (outputs are located on the bottom
of the devices) which control machine components including the pump, valves, ozone
components, visual touch screen, transducer, etc.
The PurWater Reclaim System 3.0 is designed to run in Auto 24x7. In Auto - the pump
runs continuously if no major faults are present. The pump runs on the Variable Frequency
Drive (VFD) in one of two ways - either Recirculation or Activation. In Recirculation mode,
the pump runs at a preset speed of either 33.9 or 39.9 Hz, the recirculation motorized ball
valve (except on PW050 and PW100 units) is closed running water through one or two
cyclones only. The system constantly runs treated water back into the tanking. During a
Wash Cycle, the pump speed varies based on transducer feedback as the VFD controls
the pump speed to maintain 40 psi on the treated water line. The recirculation valve opens
during the wash cycle which allows a water path through all cyclones. The pump still
recirculates some treated water back into the tanks at this time. Reclaimed water enters
in the upper portion of the cyclonic separators and spins the water to separate the solids
from the water which get directed downward. Five micron or lower treated reclaim water is
directed upward to the wash equipment via the treated line. Solids are then routed out the
bottom of the cyclones via the underflow line to either the trench or directly back to the first
chamber of the first tank. If a major fault occurs, the system turns the fresh water bypass
valve on only when the wash activation signal comes on.
The major faults that will shut the pump down and open the bypass solenoid (on Wash
Activation) include if the VFD is off, faulted or failed, the low level float (if installed in the
last tank) is down indicating a low water level, or if the pump runs under 4 psi for more
than 10 seconds continuously. If a low float fault clears on its own (water level is back up
in the tank), the system will go back to running the pump. Minor faults include either of
the mechanical ball valves not opening or closing, and require being acknowledged on the
touch screen. If the system has ozone components installed, faults will shut only the ozone
components down and may clear on their own. Not addressing minor faults can lead to
larger problems.
Hand and Off mode are available in the event there is no desire to run the reclaim system.
For example, if there was a leak in the product line and it was being repaired, the system
would be Off. Another example would be when doing maintenance and cleaning the
basket strainer. The system would be in “Hand” to run in fresh water bypass during the
maintenance interval.
System Operation
Summary of Contents for PURWATER RECLAIM 3.0
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