Operation; Description Of Operation - 3P Technik TC320 Installation And Operating Manual

Operation

Description of Operation

The 3P TC Series Tank Controller is a fluid level control system which maintains the water level in a tank
between 2 set points (adjustable) by switching on pumps, solenoid valves, or any other connected devices
to fill or drain the tank as needed. It is a microprocessor based unit and senses water depth using a piezo
electric pressure sensor.
This type of solution provides vast improvements in reliability when compared with traditional panel built
systems based on float switches, along with reduced installation time, easy reconfiguration, reduced
maintenance, and smaller space requirements within the plant room.
The upper and lower set points and function of devices within the tank are easily set from the control panel
without the need to access the rainwater tank.
Control of attached devices is provided via direct mains voltage outputs from the control panel in single
phase, operating as necessary within the level set points specified by the user. Pumps, solenoids,
motorised valves and sluices can all be controlled automatically to add or remove fluid to achieve the
desired level. Multiple appliances can be used within the same tank.
Contactors or relays can be used to allow control of 3 phase, or low voltage devices.
Outputs can be assigned as Fill or Drain types, and are each set a level range between which to operate.
Each output can be assigned to one probe, and up to 5 switched inputs and 2 virtual inputs to provide
further qualification for activation. For example, a pump could be assigned to drain a tank upon reaching a
certain level only if a reed switch at the destination tank reports it as not being already full, or perhaps to
supply water to an outlet only if a pressure switch on that line shows low pressure.
Virtual I/O consists of inputs and outputs that don't physically exist, you can't connect wires to them as
there are no terminals, but a virtual output is connected logically to a corresponding virtual input. In fact,
the output and input are just two ways of visualizing the same object in the software. By setting a virtual
output to trigger on certain levels and inputs from one tank and then using it as an input for the other, the
behaviors of both tanks can be made interdependent.
For attenuation systems, the use of a pressure based sensor allows for a very wide band of operation
between cut-in and cut-out levels. The ability to operate different pumps with different purposes
independently in the same tank easily allows you to configure combined harvesting/attenuation systems,
or add a high level pumped overflow without additional control equipment.
TC Series Controller v1.30
www.3ptechik.co.uk 09-August-2017 Page 12 of 28