Pressure Unit - Pentair NOCCHI CPS 10 Manual

4.1.2 PRESSURE UNIT

NOTE
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.
• 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 system has five settings:
• 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)
• 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
NOTE
Settings for the master motor (PRI "P") can be selected using the installation menu parameters.
NOTE
Settings will be saved in case of a power failure.
NOTE
For a correct configuration, we recommend using the installation parameter menu (Lev. 2) with the machine on STOP
and connected to the power supply.
• 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
• 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. The second pump cannot
support the first in this mode
• ALTERNATING 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).
• 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
If the pump stops because of a fault,
the second pump will automatically
substitute it. The second pump cannot
support the first in this mode
• JOCKEY: In this mode, the first pump
to start-up is the one entered as the
primary pump under the "type of
pump" parameter. Regardless of the
conditions for turning off the system,
the second pump can support the first
in this mode (BOOSTER setting – CH5
see Chpt. 5.3.4)
GB
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