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6.2. FILTER PARAMETERS
When the automatic cleaning of the filters is to be made, the required
parameters are entered here. The first is for the number of filters in the
installation, with a maximum number of 9.
The initial wait is the time between the activation of the general of fil-
ters and when the cleaning of the first filter starts.
The activation time per filter corresponds to the seconds that water
circulates in order to wash each filter.
A pause can be applied between the washing of one filter and an-
other, whereupon the filter being cleaned will be closed and the unit will
wait the number of seconds indicated before activating the valves to wash
the next one. This is used to prevent a drop in pressure due to the hydrau-
lic delay that occurs when the valve is closed.
The units between cleanings correspond to the volume in m3 or the
irrigation time in minutes that must pass through the filters in order to
perform a new automatic cleaning; this can also be initiated by a differen-
tial pressure gauge or ordered manually. In any event, the internal meters
will be set to zero between cleanings.
It is possible to configure a filter general to activate an output during
the entire filter cleaning process.
In order to manage the automatic washing, it is necessary to know
the relation between pumps P1 and P2. Mark “yes” when the water be-
ing flushed through is circulating through the filters. By doing this we control the units of volume or time circulating
through the filters or monitor the differential pressure gauge.
When managing the cleaning using the differential pressure gauge and in the event it malfunctions, a maxi-
mum number of subsequent cleanings can be determined in order to stop them and create a malfunction. This
will only be considered an incident if a time less than five minutes has elapsed between the end of one cleaning
and the start of another. Once the incident in the pressure gauge has been resolved, we must access the “Manual-
Filters” section to remove the malfunction and thus activate the filter washing control system once again. Check
chapter [8.].
If necessary, sectors being irrigated can be stopped in order to best optimize pressure. In this case the pro-
grams being run that contain sectors related to the filters are temporarily stopped and continued at the same point
once the cleaning tasks have terminated. If a program is under way in a sector that does not activate the motor or
activates one non-related to the filters, it will continue without stopping during the cleaning cycle. Keep in mind
that when sectors are stopped, the motors related to the cleaning times will be activated; if the order to stop is not
given, the motors related to the sectors being irrigated will remain active.
6.3. GENERAL PARAMETERS
In this section, the general inputs and outputs on the Agrónic 2500
are configured so as to adapt them to each facility.
The equipment has two outputs for general motors or valves in order
for them to be activated or not.
Each pump output has temporization functions to adjust to hydraulic
delays and prevent waterhammers. The start temporization delays the
pumps input when irrigation starts and the stop temporization extends
the stopping period when irrigation is terminated.
If the irrigation must be terminated as the motor has to be stopped
immediately and the sector outputs are to remain active for a few more
seconds, we have to respond affirmatively to the question regarding
“Stopping the sectors”.
Example diagram:
FILTER PARAMETERS
N. of filters: 3
Initial wait: 000”
Time of activation
by filter: 045 “
Pause between filters: 04 “
Units between cleanings
Volume: 0000 m3
Time: 0000 ‘
General of filters: no
Relation with P1: yes
Relation with P2: no
Max. number of continuous
cleanings: 0
Stop of sectors: no
GENERAL PARAMETERS
Pump 1: yes
Temp. start: 018 “
Temp. stop: 012 “
Stopping the sectors: no
Pump 2: yes
Temp. start: 005 “
Temp. stop: 022 “
Stopping the sectors: yes
