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6.2.5.3
External Control
The machine can be controlled by an external control unit or by a PC. To use this mode, see
also paragraphs 5.1.2 and 5.4.
This function is set by means of this sub-menu, which considers separate items for inputs
and outputs, plus an item ("Status") that sums up the current status of the inputs and
outputs.
This function is disabled and not configured when the system leaves the factory. The
electrical characteristics of the inputs and outputs are given in paragraph 2.3.
6.2.5.4
Configuration of the Inputs
The inputs are configured from this menu page.
From this item, you first set the general enabling of "EXT External Control" mode. The inputs
‐
include:
‐
a digital input for the START/STOP control;
an analog input, through which the setpoint to be activated is communicated.
The analog input can be selected "in volgage 0-10 V" or "in current 4-20mA".
The setpoint to be activated can be chosen for regulation by Flow or regulation by Speed % (see paragraph 5.1.1.)
6.2.5.5
Configuration of the Outputs
A relay output (clean contact), normally open, is available. It can be
‐
configured to signal:
the running status ("RUN") When the pump is running the contact closes, and it
‐
remains open when the pump is stopped.
the system block status ("FAULT") In the case of blocking errors the contact opens,
whereas it remains closed when faults are absent.
The outputs are configured from this menu page. The
factory values are given in chapter 8.
6.2.6
Priming
Each time the pump starts, the system performs the priming procedure (if enabled). Priming
‐
consists of two phases:
At the end of pump startup (as described in par. 5.2), the flow is checked; if it regular,
‐
Priming has already been completed and it passes to the conditions of the active setpoint.
If this is not the case, the system has discharged and must be primed again: it now enters
the second phase, where the pump is activated at Maximum Priming Speed, until it is
primed or at any rate for all the time specified by the parameter "Max Priming Time".
Here too, if priming has been successful, it proceeds regularly according to the active
setpoint.
But if priming has not been successful, it goes into "NoPriming" fault status (block). On
blocks and resets, see chapter 7.
‐
The "Priming" item on the menu allows you to:
‐
enable or disable the function (factory value: enabled);
‐
select the setpoint between 50% and 100% (E.swim 150)
‐
select the setpoint between 50% and 150% (E.swim 300)
select "Time", between 1 and 30 minutes.
The factory values are given in chapter 8.
In installations below water level, it is not generally necessary to perform Priming each time the pump is started (and it can be
disabled).
The maximum speed during priming ("Max Priming Speed") can be reduced in the case of systems that are not able to withstand
high speeds.
6.2.7
Antifreeze (Protection against water freezing in the pump)
As is known, the formation of ice, that is the change of state of water from liquid to solid, causes an increase in volume, with the risk of breakages
for the systems containing water.
For this reason it is generally recommended to empty any pump and hydraulic system during winter, when the temperatures are close to freezing
ENGLISH
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Figure 33
Figure 34
Figure 35
Figure 36
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