Grundfos Booster set Hydro MPC-F 3 CR15-7 U2 D-B-G-A

Booster systems with frequency converter control

The Hydro MPC-F pressure booster system, supplied as compact assembly, maintains a constant pressure through
continuous adjustment of the speed of the pump connected to the CUE frequency converter.
The system performance is adapted to the demand through cutting in/out the required number of CR pumps and
through parallel control of the pumps in operation.
One of the CR pumps is connected to an external Grundfos CUE frequency converter. The speed-controlled
operation alternates between the pumps.
Pump changeover is automatic and depends on load, time and fault.
The system consists of these parts:
– vertical multistage centrifugal pumps, type CR15-7. Pump bases and heads are made of either cast iron
EN-GJS-500-7; other vital parts are made of stainless steel EN DIN 1.4301 (AISI 304).
The pumps are equipped with a service-friendly cartridge shaft seal, HQQE (SiC/SiC/EPDM).
– Two galvanised steel manifolds.
Galvanised steel base frame up to CR 90; above CR 90 the pumps are placed on a
galvanised I-Beam frame.
One non-return valve and two isolating valves for each pump.
Adapter with isolating valve for connection of diaphragm tank.
Pressure gauge and pressure transmitter (analog output, 4-20 mA).
Control MPC in a steel cabinet, IP54, including main switch, all required fuses, motor
protection, switching equipment and microprocessor-controlled CU 352.
Dry-running protection and diaphragm tank are available according to the list of accessories.
Pump operation is controlled by Control MPC with the following functions:
– intelligent CU 352 multi-pump controller
constant pressure control through continuously variable adjustment of the speed of
one of the installed pumps
PID controller with adjustable PI parameters (Kp + Ti)
constant pressure at setpoint, independent of inlet pressure
on/off operation at low flow
automatic cascade control of pumps for optimum efficiency
selection of min. time between start/stop, automatic pump changeover and pump
priority.
automatic pump test function to prevent idle pumps from seizing up
possibility of standby pump allocation
possibility of backup sensor (redundant primary sensor)
manual operation
possibility of external setpoint influence
log function
setpoint ramp
possibility of digital remote-control functions
system on/off
max., min. or user-defined duty
up to six alternative setpoints
possibility to configure digital inputs and outputs individually
pump and system monitoring functions
minimum and maximum limits of current value
inlet pressure
motor protection
sensors monitored to prevent malfunction
alarm log with the previous 24 warnings/alarms
display and indication functions
colour screen display
green indicator light for operating indications and red indicator light for fault
indications
potential-free changeover contacts for operation and fault

Grundfos bus communication.
It is possible to add CIM communication modules for communicating with SCADA/BMS.
Pumps, piping, cabling complete are mounted on the base frame.
The Control MPC is supplied for installation next to the booster set.
The booster system has been preset and tested.

Pumped liquid: Water
Liquid temperature: 5 °C to 60 °C
Max. operating pressure: 16 bar
Mains supply: 380-415 V
Rated current: 33.6 A
Suction port: DN 100
Discharge port: DN 100
Net weight: 495 kg
Gross weight: 615 kg