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9.3.8 - Assigning the starting order
Each time the system is switched on a starting order is associated with each device. Depending on this, the sequential starts of the devices are
decided. The starting order is modified during use as necessary by the following two algorithms:
• Reaching the maximum switching time.
• Reaching the maximum inactivity time.
9.3.9 - Maximum switching time
Depending on the parameter ET (maximum switching time), each device has a working time counter, and depending on this the starting order is
updated with the following algorithm:
• if at least half of the ET value has been exceeded, the priority is exchanged the first time the inverter switches off (exchange to standby);
• if the ET value is reached without ever stopping, the inverter is switched off unconditionally and is taken to minimum restarting priority
(exchange during running).
If the parameter ET (Max. switching time) is set at 0, there is an exchange at each restart.
See 5.6.8 - ET: Max. switching time.
9.3.10 - Reaching the maximum inactivity time
The multipump system has an anti-stagnation algorithm, the aim of which is to keep the pumps in perfect working order and to maintain the
integrity of the pumped fluid. It works by allowing a rotation in the pumping order so as to make all the pumps supply at least one minute of flow
every 23 hours. This happens whatever the device configuration (enabled or reserve). The exchange of priority requires that the device that has
been stopped for 23 hours be given maximum priority in the starting order. This means that as soon as it is necessary to supply flow, it will be the
first to start. The devices configured as reserve have precedence over the others. The algorithm ends its action when the device has supplied at
least one minute of flow. When the intervention of the anti-stagnation algorithm is over, if the device is configured as reserve, it is returned to
minimum priority to preserve it from wear.
9.3.11 - Reserves and number of devices that participate in pumping
The multipump system reads how many elements are connected in communication and calls this number N.
Then depending on the parameters: number of active devices and NC it decides how many and which devices must work at a certain time.
NC represents the maximum number of devices that can work at the same time.
If there are a number of active devices in a chain and NC simultaneous devices, with NC smaller than the number of active devices, it means that
at the most NC devices will start at the same time and that these devices will exchange with the number of active elements. If a device is configured
with reserve preference, it will be the last in the starting order, so for example if I have 3 devices and one of these is configured as reserve, the
reserve will be the third element to start, whereas if I set the number of active devices to 2, the reserve will not start unless one of the two active
ones develops a fault.
See also the explanation of the parameters
5.6.6 NC: Simultaneous devices;
5.6.7 IC: Configuration of the reserve.
9.3.12 - Wireless control
As described in par. 5.5.4, the device can be connected to other devices by means of the proprietary wireless channel.
10. MAINTENANCE
Disconnect the power supply before starting any work on the system.
The system requires no routine maintenance operations.
However, below are the instructions for performing the special maintenance operations that may be necessary in particular cases (e.g. emptying
the system to put it away during a period of inactivity).
10.1 Accessory tool
With the product, DAB supplies a metal key with a hexagonal section (Fig.21) useful for performing some
special maintenance operations on the system, or during installation.
In particular, use the key for the orientation of the interface panel described in par. 2.2.2 or for opening the
door of the compartment next to the interface panel. If the key is lost or damaged, the operation can be
done using a standard 2mm allen wrench.
Figure 21
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