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These restart attempts will be scheduled as follows:
• From the 1st to the 48th attempt: 1 restart every 30 minutes for 20 seconds each
• From the 49th attempt: 1 restart every 24 hours for 20 seconds each
The DRYRUN alarm can be reset manually: if after this reset the pump still does not detect flow and pressure, attempts will last 20
seconds.
The pump electronics have an anti-burping system that prevents false priming due to possible water bubbles.
ANTICYCLING
Slight hydraulic leaks in the system downstream from the pump, when the system is under pressure and without flow, can lead to a gradual drop
in pressure. This will cause the pump to start up periodically, causing damage to the motor, especially when starting at a short distance.
In this case, the electronics recognise the condition and activate the ANTICYCLING alarm. The alarm will prevent the pump motor from starting.
The alarm can be removed manually. The alarm will still be removed automatically after 12 hours.
5
COM BOX
In the case of the DTRON3 model, after having connected the COM BOX to the power mains, all the LEDs of the interface are on to allow the
user to verify its operation.
The DTRON 3 pump can work in “Auto” mode (default) or in “MANUAL MODE”.
5.1
Manual Mode
The user may require the pump motor to be switched on constantly. Attention: as in the case of pumps without electronics, any
control and protection (Anti DRY RUN, Anti Cycling etc.) is excluded and the pump can only be stopped by pressing buttons 1
and 2 at the same time (see image 12).
Forced motor shutdown
The user can force the motor to be shut down, which in any case prevents the motor from starting.
The shutdown described here is also effective if starting is set to "Manual" mode.
5.2
Auto mode
In this mode, the pump power supply is supplied to the motor according to the evolution of the user's requirements and the hydraulic conditions
of the system, as described below.
ANTICYCLING
In the case of the DTRON3 model, the anticycling function is disabled by default. It can be enabled using the COM BOX (see function Figure 12,
11)
5.3
COM BOX – DTRON3 Connection
The pump is connected to the COM BOX by means of the Power Line Communication protocol, from now on indicated in the manual as PLC.
Through this communication COM BOX is able to show the user a lot of information about the status and operation of the pump. The user can
also actively interact with the pump by giving it several commands, as described below.
In order to communicate, DTRON3 and COM BOX must be associated.
The DTRON3 and COM BOX in the package are already associated in the factory;
If the two units are already associated, the connection is made within 30 seconds after the COM BOX and the DTRON3 are switched on, the
two units will be connected (blue PLC LED on with steady light).
The quality of the PLC connection can be influenced by many factors:
-
Power mains topology
-
Reactive loads present on the line
-
Connection length
-
Cable cross section
If there are communication problems, reduce the distance (and therefore the length of the electrical connection) between the two devices.
The two devices must be connected to the same single-phase power supply and must have a common phase and neutral.
5.4
How to associate DTRON3 and COM BOX
As described in the previous chapter, the DTRON3 and COM BOX in the package are already associated in the factory.
If one of the two devices has to be replaced, it will be necessary to make a new association between COM BOX and DTRON 3, according to the
following procedure:
