Outlets; Operating Theory - Progres AGRONIC 52 Instruction Manual

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5.2. OUTLETS.

The unit has 5 digital outlets.
Outlets are protected by a 2.5 A fuse F Type (fast). Re-
place it with a similar one if it fuses.
SECTION OF THE UNIT INFERIOR BOARD
- S1, S2: Digital outlets for the opening and closing of
the motorised valve M1. S1 is connected to the closing
terminal of the motorised valve and S2 to the opening one.
If no motorised valve is connected to these outlets, but
there is an electrovalve, connect it to S2.
- S3, S4: Digital outlets for the opening and closing of
the motorised valve M2. S3 is connected to the closing
terminal of the motorised valve and S4 to the opening one.
If no motorised valve is connected to these outlets, but
there is an electrovalve, connect it to S4.
- S5: Digital outlet used for the breakdown warning.
DIGITAL OUTLET CONNECTION

6. OPERATING THEORY

The unit can be programmed in two different ways:
- By opening: In this case, the programmer only opens
the existing motorised valves up to the point indicated in
the programme and it does not carry out any type of regu-
lation. However, it checks whether the conductivity level is
within the established alarm limits.
- By conductivity reference: When the reading of the
electric conductivity (CE) is higher or lower than the speci-
fied permissiveness margin, the programmer corrects the
deviation making minimum movements of the motorised
valve chosen for the regulation. If only one motorised valve
is available, it will be the chosen one. In order to know
whether the programmer has to open or close the motor-
ised valve it takes into account the CE level (high or low CE)
which the water controlled by the motorised has in refer-
ence to the other water.
If two motorised valves are available, the programmer
starts the regulation by opening as much as possible one of
the motorised valves (the one which corresponds to the
cheapest water) and it regulates with the other one. If the
opening of this motorised valve reaches its minimum, it is
not possible to obtain the reference indicated in the pro-
gramme. Otherwise, if the motorised valve reaches its max-
imum opening, the programmer tries to reach the indicated
reference, closing the motorised valve which corresponds
to the cheapest water.
While a programme is working, it is not possible that
the two motorised valves reach their minimum opening,
but it is possible that both are completely open.