DAB Esybox Serie Instructions Pour L'installation Et L'entretien page 61

IC: Configuration of the
reserve
Examples f configuration for multipump systems:
Example 1:
A pump set composed of 2 devices (N=2 detected automatically) of which 1 set active (NA=1), one simultaneous (NC=1 or NC=NA since
NA=1) and one as reserve (IC=reserve on one of the two devices).
The result obtained is the following: the device not configured as a reserve will start and work by itself (even though it does not manage to bear
the hydraulic load and the pressure achieved is too low). If it has a fault, the reserve device steps in.
Example 2:
A pump set composed of 2 devices (N=2 detected automatically) in which all the devices are active and simultaneous (factory settings NA=N
and NC=NA) and one as reserve (IC=reserve on one of the two devices). The result obtained is the following: the device that is not configured
as reserve always starts first, if the pressure detected is too low the second device, configured as reserve, also starts. In this way we always
try to preserve the use of one device in particular (the one configured as reserve), but this may be useful in case of necessity when a greater
hydraulic load occurs.
Example 3:
A pump set composed of 4 devices (N=4 detected automatically) of which 3 set active (NA=3), 2 simultaneous (NC=2) and 1 as reserve
(IC=reserve on two devices),
The result obtained is the following: at the most 2 devices will start at the same time. The operation of the 2 that can work simultaneously will
take place in rotation among 3 devices so as to respect the maximum exchange time of each (ET). If one of the active devices develops a fault
no reserve starts up because more than 2 devices cannot start at one time (NC=2) and there are still 2 active devices present. The reserve
intervenes as soon as another of the 2 develops a fault.
ET: Max. switching time
AY: Anti Cycling
AE: Enabling the anti-block
function
AF: Enabling the anti-freeze
function
Configures the device as automatic or reserve. If set on auto (default) the device participates in normal pumping, if
configured as reserves, minimum starting priority is associated with it, this means that the device with this setting will
always start last. If a number of active devices is set that is one lower than the number of devices present and if one
element is set as reserve, the effect obtained is that, if there are no problems, the reserve device does not participate
in regular pumping; instead, if one of the devices that participates in pumping develops a fault (maybe loss of power
supply, tripping of a protection, etc.), the reserve device will start.
The state of configuration as a reserve can be seen as follows: on the Multi-pump System page, the top of the icon
is coloured; on the AD and main pages, the communication icon representing the address of the device appears
with the number on a coloured background. There may be more than one device configured as reserve in a pumping
system.
Even though the devices configured as reserve do not participate in normal pumping, they are nevertheless kept
efficient by the anti-stagnation algorithm. The anti-stagnation algorithm changes the starting priority once every 23
hours and allows the accumulation of at least one continuous minute of supply of flow from each device. The aim of
this algorithm is to avoid the deterioration of the water inside the impeller and to keep the moving parts efficient; it is
useful for all devices and especially for those configured as reserve, which do not work in normal conditions.
Sets the maximum continuous working time of a device in a set. It is significant only on pump sets with
interconnected devices. The time can be set between 1 min and 9 hours; the factory setting is 2 hours.
When the ET of a device has elapsed the system starting order is reassigned so as to give minimum priority to the
device on which the time has elapsed. The aim of this strategy is to use less the device that has already worked
and to balance the working time between the various machines that make up the set. If the hydraulic load still
requires the intervention of the device, even though it has been put last in starting order, it will start to guarantee
pressure boosting of the system.
The starting priority is reassigned in two conditions based on the ET time:
Exchange during pumping: when the pump remains on without interruption until the absolute maximum pumping
time has been exceeded.
Exchange to standby: when the pump is on standby but 50% of the ET time has been exceeded.
If ET has been set at 0 there will be exchange to standby. Whenever a pump in the set stops, a different pump will
start first next time it is restarted.
If the parameter ET (Max. switching time) is set at 0, there will be exchange at each restart, irrespective of the
pump's actual work time..
As described in paragraph 9, this function is for avoiding frequent switching on and off in the case of leaks in the
system. The function can be enabled in 2 different modes, normal and smart. In normal mode the electronic control
blocks the motor after N identical start/stop cycles. In smart mode it acts on the parameter RP to reduce the negative
effects due to leaks. If set on "Disable", the function does not intervene.
This function is for avoiding mechanical blocks in the case of long inactivity; it acts by periodically rotating the pump.
When the function is enabled, every 23 hours the pump performs an unblocking cycle lasting 1 min.
If this function is enabled the pump is automatically rotated when the temperature reaches values close to freezing
point, in order to avoid breakages of the pump.
ENGLISH
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