English (GB)
4
2. Abbreviations and definitions 3. General information
These installation and operating instructions are a
supplement to the installation and operating
instructions for the corresponding standard pumps
CR, CRI, CRN, SPK, MTR and CM. For instructions
not mentioned specifically in this manual, see the
installation and operating instructions for the
standard pump.
4. General description
Grundfos E-pumps are fitted with
frequency-controlled permanent-magnet motors for
single-phase or three-phase mains connection.
4.1 Pumps without factory-fitted sensor
The pumps have a built-in PI controller and can be
set for an external sensor enabling the control of the
following parameters:
• constant pressure
• constant differential pressure
• constant temperature
• constant differential temperature
• constant flow rate
• constant level
• constant curve
• constant other value.
The pumps have been factory-set to constant-curve
control mode. You can change the control mode with
R100 or Grundfos GO.
4.2 Pumps with factory-fitted pressure
sensor
The pumps have a built-in PI controller and are set
for a pressure sensor enabling the control of the
outlet pressure.
The pumps have been factory-set to
constant-pressure control mode. The pumps are
typically used to keep a constant pressure in
variable-demand systems.
AI Analog input.
AL Alarm, out of range at lower limit.
AO Analog output.
AU Alarm, out of range at upper limit.
CIM Communication interface module.
Current
sinking
The ability to draw current into the
terminal and guide it towards GND in
the internal circuitry.
Current
sourcing
The ability to push current out of the
terminal and into an external load
which must return it to GND.
DI Digital input.
DO Digital output.
ELCB Earth leakage circuit breaker.
FM Functional module.
GDS
Grundfos Digital Sensor.
Factory-fitted sensor in some
Grundfos pumps.
GENIbus
Proprietary Grundfos fieldbus
standard.
GFCI
Ground fault circuit interrupter.
(USA and Canada).
GND Ground.
Grundfos
Eye
Status indicator light.
LIVE
Low voltage with the risk of electric
shock if the terminals are touched.
OC
Open collector:
Configurable open-collector output.
PE Protective earth.
PELV
Protective extra-low voltage.
A voltage that cannot exceed ELV
under normal conditions and under
single-fault conditions, except earth
faults in other circuits.
RCD Residual-current device
SELV
Safety extra-low voltage.
A voltage that cannot exceed ELV
under normal conditions and under
single-fault conditions, including
earth faults in other circuits.
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