IMP Pumps NMT(D) 40-100 & NMT SAN flanges - Manual (Page 17)

GB
-17-
2. s
afety
These instructions should be studied carefully before installing or operating the pump. They are
meant to help you with installation use and maintenance and to increase your safety. Installation
should only be performed with regards to local standards and directives. Only qualified personnel
should maintain and service these products.
2.1 d
anger symbols
Safety precautions which, if ignored, could cause personal injury are indicated by the symbol
above:
Precautions that are necessary to adhere to avoid machinery damage carry:
Tips that could ease pump handling are marked with:
2.2 r
isks
Failure to comply with safety precautions could cause personal injury or machinery damage and
loss of right to refund. Safety functions are only guaranteed if the pump is installed, used and
maintained as described in this manual.
3. p
ump descriptiOn
Electronically commutated regulated NMT pumps consist of two main parts centrifugal pump
of appropriate head and electronic regulator. Hydraulic part is hermetically sealed from motor
assembly and has no moving seals. NMT pumps are powered by ECM permanent magnet motor
that does not consume any energy to magnetize the rotor and so provides high energy efficiency.
ECM motor is run by frequency converter with integrated PFC (Power Factor Correction) filter.
Converter estimates current flow and head from the motor loading. That information is essential
for differential pressure control.
3.1 r
egulaTion modes
Various regulation parameters (desired head, supply power, rpm limit) will reduce the head until
the pump achieves desired response.