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CHAPTER 4 - FUNCTIONING
4.1
PRODUCT DESCRIPTION
4.1.1 MOTOR PUMP
The system is composed of a motor pump and an electronic control system (inverter) that enables the
pressure to be maintained constant in the system, reducing or increasing the rotation speed of the pump
motor.
When the system pressure goes below the threshold set, the module starts the pump to reset the set point
pressure; the rotation speed of the pump varies based on the water request, therefore, greater request
requires greater speed, until the maximum set pressure is reached.
When the request for water decreases, speed will also reduce until the pump reaches the minimum speed
set and after which, if there are no further decreases in pressure (i.e. new water requests), the pump will go
in stand by until a new cycle begins.
4.1.2 PRESSURE UNIT
x
The system is comprised of two electrical pumps equipped with an electronic control system (inverter) which
allows it to maintain the system's pressure constant, reducing or increasing the speed at which the electronic
pump motor rotates.
When the system's pressure falls below the set threshold level, the module starts-up the first pump (Master -
PRI P) to reset set point pressure; the speed at which the pump rotates varies based on water requirements,
as such, greater requirements will result in higher speeds until the maximum threshold level is reached. After
this, the module will activate the second pump (Slave - SEC "S") to provide support and maintain a stable
pressure if greater performances are required.
As water requirements diminish, speed of the last pump which has come into play will be reduced until it is
switched off. The module will keep the first pump which came into play working until the minimum set speed
is reached. The pump is stopped if pressure is not reduced further (that is new water requirements).
If the pump stops because of a fault, the second pump will automatically substitute it.
The system has five settings:
x
Cyclical. Indicates that the first pump to come on at the next request for water will be the one which
has not started-up or which started-up second. The second pump can support the first in this mode
(BOOSTER setting – CH1 see Chpt. 5.3.4).
x
.
Alternating
The two motors function in an alternating manner, changing place at each start-up or
after a set period of time entered in the installation parameter menu (see chpt. 5.3.4: CH2, SCA T
and SCA S). The second pump cannot support the first in this mode.
x
Cyclical with running hours. The two motors function based on the number of hours worked,
changing place after set number of hours entered in the installer menu (see chpt. 5.3.8: CH4, SCA T
and SCA S). If the pump stops because of a fault, the second pump will automatically substitute it.
CPS controls for the unit, such as MASTER (PRI – P) and SLAVE (SEC – S), are
automatically configured. Alternatively, the "advanced parameters" can be used to
configure the controls.
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