Abbreviations And Definitions; Product Introduction; Product Description - Grundfos CRE Installation And Operating Instructions Manual

2.3 Abbreviations and definitions

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.
The ability to draw current into the terminal
Current sinking and guide it towards GND in the internal
circuitry.
The ability to push current out of the terminal
Current sourcing and into an external load which must return it
to GND.
DI Digital input.
DO Digital output.
FM Functional module.
Grundfos Digital Sensor.
GDS
Factory-fitted sensor in some Grundfos
pumps.
GENIbus Proprietary Grundfos fieldbus standard.
Ground fault circuit interrupter.
GFCI
(USA and Canada).
GND Ground.
Grundfos Eye Status indicator light.
Low voltage with the risk of electric shock if
LIVE
the terminals are touched.
Open collector:
OC
Configurable open-collector output.
PE Protective earth (ground).
Protective extra-low voltage.
A voltage that cannot exceed ELV under
PELV
normal conditions and under single-fault
conditions, except earth (ground) faults in
other circuits.
Safety extra-low voltage.
A voltage that cannot exceed ELV under
SELV
normal conditions and under single-fault
conditions, including earth (ground) faults in
other circuits.
6

3. Product introduction

3.1 Product description

Grundfos E-pumps are fitted with frequency-controlled permanent-
magnet motors for single-phase or three-phase power supply
connection.
3.1.1 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
Remote.
3.1.2 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.
3.1.3 Settings
The description of settings applies both to pumps without factory-
fitted sensor and to pumps with a factory-fitted pressure sensor.
Setpoint
You can set the desired setpoint in three ways:
• on the pump operating panel
• via an input for external setpoint signal
• with the Grundfos wireless R100 remote control or Grundfos
GO Remote.
Other settings
Make all other settings with R100 or Grundfos GO Remote.
You can read important parameters, such as the actual value of the
control parameter and power consumption, via R100 or Grundfos
GO Remote.
If special or customized settings are required, use Grundfos PC
Tool. Contact your local Grundfos company for more information.
3.1.4 Radio communication
This product incorporates a radio module for remote control which
is a class 1 device and which you can use anywhere in the EU
without restrictions.
For use in USA and Canada, see the appendix on installation in the
USA and Canada.
Some variants of the product and products sold in China and Korea
have no radio module.
This product can communicate with Grundfos GO Remote and
other products of the same type via the built-in radio module.
In some cases, an external antenna may be required. Only
Grundfos-approved external antennas may be connected to this
product, and only by a Grundfos-approved installer.
3.1.5 Battery
A Li-ion battery is fitted in CRE, CRIE, CRNE, CRKE, SPKE, MTRE
and CME pumps. The Li-ion battery complies with the Battery
Directive (2006/66/EC). The battery does not contain mercury, lead
and cadmium.