DAB E.sybox Instrucciones Para La Instalación Y El Mantenimiento página 75

The differential switch protecting the system must be correctly
sized and must be of the "Class A" type. The automatic
differential switch must be marked with the following two
symbols:
The thermal magnetic circuit breaker must be correctly sized
(see Electrical Characteristics)
3.2 Configuration of the Integrated Inverter
The system is configured by the manufacturer to satisfy the majority of
installation cases, that is:
operation at constant pressure;
•
Set-Point (desired value of constant pressure):
•
Reduction of pressure to restart:
•
Anti-cycling function:
•
However, all these parameters and many others can be set by the user.
There are many other operating modes and accessory functions. Thanks
to the different possible settings and the availability of configurable input
and output channels, it is possible to adapt the inverter operation to the
requirements of various systems. See par. 5-6-7
For the definition of the parameters SP and RP, the pressure at
which the system starts has the value:
Pstart = SP – RP
in the default configuration
The system does not work if the utility is at a height higher than the
equivalent in metres of water column of the Pstart (consider 1 bar = 10 m
water column): for the default configuration, if the utility is at a height of at
least 27m the system does not start.
SP = 3.0 bar
RP = 0.3 bar
Disabled
For example: 3.0 – 0.3 = 2.7 bar
3.3 - Priming
The priming of a pump is the phase during which the machine attempts to
fill the body and the suction pipe with water. If the operation is successful
the machine can work regularly.
Once the pump has been filled (par. 2.1.2, 2.2.3) and the device has
been configured (par. 3.2), it is possible to connect the electric power
supply after having opened at least one utility on delivery.
The system starts and checks the presence of water in delivery for the
first 10 seconds.
If a flow of water is detected in delivery, the pump is primed and starts
its regular work. This is the typical case of installation below head (par.
2.1.2, 2.2.3). The utility opened in delivery from which the pumped water
is coming out can be closed.
If a regular flow in delivery is not detected after 10 seconds, the system
asks for confirmation to enter the priming procedure (typical case of
installation above head par. 2.1.2, 2.2.3). Or:
When "+" is pressed the pump enters the priming procedure: it starts
working for a maximum time of 5 minutes during which the safety block
for dry operation is not tripped. The priming time depends on various
parameters, the most influential of which are the depth of the water level
from which it is drawing, the diameter of the suction pipe, the water-
tightness of the suction pipe. On condition that a suction pipe is used that
is no smaller than 1" and that it is well sealed (with no holes or joins from
which it can take in air), the product has been studied to manage to prime
in water conditions up to 8m in depth in a time of less than 5 minutes. As
soon as the product detects a regular flow in delivery, it leaves the prim-
ing procedure and starts its regular work. The utility opened in delivery
from which the pumped water is coming out can be closed. If after 5 min-
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