General Information; General Description; Pumps Without Factory-Fitted Sensor; Pumps With Pressure Sensor - Grundfos CRE Montage- Und Betriebsanleitung

2. General information

These installation and operating instructions are a supplement to
installation and operating instructions for the corresponding
standard pumps CR, CRI, CRN, CRT, SPK, MTR, CM and
BMS hp.
For instructions not mentioned specifically here, please see
installation and operating instructions for the standard pump.

3. General description

Grundfos E-pumps have standard motors with integrated
frequency converter. The pumps are for three-phase mains
connection.

3.1 Pumps without factory-fitted sensor

The pumps have a built-in PI controller and can be set up for an
external sensor enabling control of the following parameters:
• pressure
• differential pressure
• temperature
• differential temperature
• flow rate.
From factory, the pumps have been set to control mode
uncontrolled. The PI controller can be activated by means of
R100 or Grundfos GO Remote.

3.2 Pumps with pressure sensor

The pumps have a built-in PI controller and are set up with a
pressure sensor enabling control of the pump discharge
pressure.
The pumps are set to control mode controlled. The pumps are
typically used to hold a constant pressure in variable-demand
systems.

3.3 Settings

The description of settings apply both to pumps without factory-
fitted sensor and to pumps with a factory-fitted pressure sensor.
Setpoint
The desired setpoint can be set in three different ways:
• directly on the pump control panel
• via an input for external setpoint signal
• by means of the Grundfos wireless remote control R100 or
Grundfos GO Remote.
Other settings
All other settings can only be made by means of R100 or
Grundfos GO Remote.
Important parameters such as actual value of control parameter
and power consumption can be read via R100 or Grundfos GO
Remote.
If special or customized settings are required, use the Grundfos
PC Tool E-products. Contact your local Grundfos company for
more information.
6

4. Mechanical installation

The pump must be secured to a solid foundation by means of
bolts through the holes in the flange or base plate.
In order to retain the UL/cUL approval, follow the
Note
additional installation procedures on page 768.

4.1 Motor cooling

To ensure sufficient cooling of motor and electronics, observe the
following requirements:
• Make sure that sufficient cooling air is available.
• Keep the temperature of the cooling air below 40 °C.
• Keep cooling fins and fan blades clean.

4.2 Outdoor installation

When installed outdoors, the pump must be provided with a
suitable cover to avoid condensation on the electronic
components. See fig. 1.
Fig. 1 Examples of covers
Remove the drain plug pointing downwards in order to avoid
moisture and water build-up inside the motor.
Vertically mounted pumps are enclosure class IP55 after removal
of the drain plug. Horizontally mounted pumps change enclosure
class to IP54.

5. Electrical connection

For description of how to connect E-pumps electrically, see the
following pages:
5.1 Three-phase pumps, 1.1 - 7.5
5.2 Three-phase pumps, 11-22

5.1 Three-phase pumps, 1.1 - 7.5 kW

Warning
The user or the installer is responsible for the
installation of correct earthing and protection
according to current national and local standards. All
operations must be carried out by qualified
personnel.
Warning
Never make any connections in the pump terminal
box unless all electric supply circuits have been
switched off for at least 5 minutes.
Note for instance that the signal relay may be
connected to an external supply which is still
connected when the mains supply is disconnected.
The above warning is indicated on the motor terminal
box by this yellow label:
kW, page 6
kW, page 9.