 Automatic Control System
Hydrokleen Wastewater Recycling & Pre-Treatment
PROGRAMMABLE
LOGIC CONTROLLER (PLC)
The use of a programmable
logic controller utilizes many of the unique features that
are built into the system, in addition to the many options
that may also be part of a system to be managed by a controller.
The logic controller monitors the electrical control devices
of the system and acts upon signals it receives from these
devices. The controller will do all of the following:
1. Restart
the system automatically in the event of a power outage, provided
that the power supply switch on the control panel of the filtration
system is turned on.
2. Provide
a signal or power to activate the sump pump(s) providing effluent
to the filtration system. Power to the supplying sump pump(s)
is ultimately controlled by a signal from the float switch
in the final process tank.
3. Put
the system into “high filter rate” polish mode, the 15/45
minute program can’t be changed at this time. By default,
the system is scheduled to operate in high filter rate polish
mode for 15 minutes every hour, 24 hours per day. As part
of the normal operation of the system, the controller will
de-energize the pumps for 45 minutes every hour to reduce
power consumption. This is known as the “ENERGY SAVE MODE”.
The system may be manually taken out of energy save mode and
put into high filter rate polish mode by toggling the switch
on the control box of the Filtration System. Additionally,
the system will automatically be placed into high filter rate
polish mode whenever any of the Hydroblaster pressure washers
are activated.
When the Hydroblasters
are shutdown and/or when the high-rate toggle switch on the
control box is turned off, the pumps will continue to run
for 15 minutes before the controller puts the system into
energy save mode.
4. Put
the system into a backwash cycle at “user-configurable” programmed
intervals. By default, the system is scheduled to backwash
Monday through Friday at 2:00 am.
If the system is operating
in “high filter rate” mode at the time a backwash cycle is
scheduled, or the filtration system receives a signal to operate
in “high filter rate” mode during a backwash cycle, the system
will suspend the backwash cycle and proceed to initiate the
necessary sequence of events to bring it into the high filter
rate mode.
5. Be able
to react when a signal is received from the “foaming sensor
device,” located within the first process tank, by sending
defoaming agent into the first tank.
6. Finally,
all Hydro-Biodigester dosing is automatically timed by the
system and introduced only when not in discharge mode.
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