14
Looping limit
the number of consecutive flushing cycles triggered by the DP sensor before deciding that there is an endless
looping problem. The options are: 1-10 or “no” which means ignoring the looping problem.
Alarm
Yes/No – allocating one output for alarm activation.
Delay Valve
Yes/No – allocating an output for Delay Valve activation.
This is a special mode that enables passing through the list of outputs to see how each output was allocated.
Use the + key to change the “no” into “yes” and confirm by “Enter”, then keep using the + key to pass through the
list. At the bottom left corner the ordinal number of the output is displayed and its allocated function appears
in large letters at the center of the screen. Notice that the number of possible outputs that can be used is
always an even number since it results
from the number of “plug in” boards (each of 2 outputs) included.
However if the number of outputs needed is not an even number, 13 then the last valve allocated for flushing
may be canceled by use of the manual operations key.
Pressure units
deciding about the units to be used for pressure measurement.
Selecting between BAR or PSI .
Calibration
Zero calibration of the built in electronic DP sensor. While the sensor ports are disconnected select Calibration
= Yes.
Version display
The last screen of the configuration supplies information about the software version of the controller. the
version consists of 4 digits like the following:
6.2.7 Handling Endless Looping problems
As explained above, endless looping problem will be declared when the number of consecutive flushing cycles triggered by the DP sensor
exceeds the “Looping limit” defined during configuration.
The fact that endless looping problem was detected will be indicated on the display and will cause the activation of the Alarm output,
additionally, the DP indication will no longer be considered as a trigger for flushing. The following flushing cycles will be triggered by the
interval count down only.
The problem will be considered as solved when the constant indication of the DP sensor will be removed.
6.2.8 Handling Low pressure
When a closed contact indication is received at the low pressure input of the controller, the P symbol will start to appear blinking at
the display. All activities will stop including the countdown to the next flushing cycle. If the low pressure happened while a flushing
sequence was in progress, when the low pressure condition terminates the flushing sequence will start from the beginning rather
than continue from the stop point.
Connecting the DP sensor to the filter system The DP sensor is connected to the filter system by 2 command tubes, the one which comes from
the filter inlet (High pressure) will be connected to the red point, and the one that comes from the outlet (Lower pressure) will go to the black
point. It is important to put a small filter of 120 mesh (not supplied) between the red point and the high pressure connection point.
6.2.9 Connecting the DP sensor to the filter system
The DP sensor is connected to the filter system by 2 command tubes, the one which comes from the filter inlet (High pressure) will be
connected to the red point, and the one that comes from the outlet (Lower pressure) will go to the black point. A small Finger Filter is added
to the High Pressure inlet Fitting to protect the digital DP Switch.
6.2.10 Low battery
The unit has two levels of low battery indication. At the first level when the battery voltage drops to the first level, the sign Low Battery
will start to appear at the screen. When the battery voltage drops further and reaches the second level, all outputs will shut down, the
screen will be cleared leaving only the low battery icon
6.2.11 Manual activation
A flushing sequence can be manually activated by the “MANUAL” key. When manually activated the hand icon will appear on the
display. The same key will be used for manually terminating a sequence in progress.
