ed. 09/202

NR, NRS 60 H

z

EI: Pumps with frequency converter

The NR(D) EI, NR4 EI, pumps are available with power from 0,25 kW up to 22 kW, the pumps are equipped with I-MAT installed on board

This design enables the creation of a highly compact and e

fficient variable-speed system, making them ideal for water supply applications and the distribution o

hot and cold water

The pump is

fitted with transducers optimized for operation and is pre-programmed at the factory for seamless performance.

Feature

s

•

Energy saving

Compact design

Easy to use

Programmable to suit the system requirements

Reliability

Standard executio

n

• The system consists of:

• Pump

• Induction motor (2 for NRD, NRD4)

• I-MAT Frequency converter (2 for NRD, NRD4)

• Motor adapter for the motor mounting of the frequency converter (2 for NRD, NRD4)

• Connection cable between frequency converter and induction motor

• Single pressure transducer for 2 poles and differential transducer for 4 poles

• - Communication cable for cascade mode for NRD, NRD4

• - 2 Cascade mode expansion board for NRD, NRD4

Main feature

s

Rated motor power output from 0,25 kW to 22 kW.

Control range from 1750 to 3450 rpm (2-pole)

Control range 870÷1750 1/rpm (4-pole

)

Protection against dry running

Protection against operations with closed valve ports

Protection against system leakages

Protection against overcurrent in the motor

Protection agains overvoltage and undervoltage of the power suppl

Protection against current unbalances between phases

Operating mode

s

Constant pressure mode

with pressure transduce

In this mode, the system maintains the preset pressure regardless of changes in the

flow demand of the installation

Proportional pressure mode

with pressure transducer

In this mode the system changes the working pressure according to the required

flow rate.

Constant flow mode

with

flow meter

pressure

In this mode, the system maintains a constant flow rate at a specific point in the installation, adjusted according to the require

Fixed speed mode

with setting of the speed preferential rotation.

In this mode, by changing the working frequency, you may choose any operational curve included within the working range

min

Constant temperature mod

e

with temperature transduce

In this mode the system keeps the temperature constant inside a system by changing the speed of the pump