Pressure Unit - Pentair CPS3-10 MULTINOX VE+ 4-120 Instructions De Service

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.
When the system pressure goes below the threshold set, the module starts the first pump of the group (Master – PRI "P" at first start-up)
as to reset the set point pressure; the rotation speed of the pump varies according to the water request, therefore, the greater the
request is and the higher the speed must be, until the maximum set pressure is reached; after that, if the system requires a higher
performance, the module will start the first pump, then the second, the third and so on (Slave – SEC "S") in order to maintain a constant
pressure.
When the request for water decreases, the last pump started will decrease its speed until shutting off. The system will keep the first
pump in function until reaching the preset minimum speed; after that the pump will be shut off unless a new pressure decrease will
arise, thus requesting more water. At the next restart, the pump order start can vary according to the cycle mode chosen, as detailed
later. If the pump stops because of a failure, the system replaces it with another pump present in the system. In case the MASTER
pump is damaged, the system chooses the MASTER pump in a random and automatic way and transfers all the main controls to it. The
MASTER is always chosen among the pumps connected to the sensor.
The system has five settings:
•
Cyclical (CH1): 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 (CH2): The 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). In this
way only one pump works while the
others are in standby mode and never
replace the first one. If the pump stops
because of a failure, another pump will
automatically replace it
NOTE
The working modes can be set in the installation parameters menu on the master motor (PRI "P").
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.
•
Cyclical with running hours (CH3): This
indicates that the first pump to enter
in function after a GBwater request will
be the one that has worked less (see
parameters on working hours). In this
mode the other pumps can help the
first one. (BOOSTER mode – CH3 see
chpt. 5.3.4)
•
Alternating with running hours (CH4):
The 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 failure,
another pump will automatically
replace it. The second pump cannot
support the first in this mode
•
Jockey (CH5): 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)
EN
29