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English (US)

2. Symbols used in this document

3. General information

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

4. General description

Grundfos E-pumps have standard motors with integrated
frequency converter. The pumps are for single-phase or three-
phase power supply connection.

4.1 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
• liquid level in a tank.
From factory, the pumps have been set to control mode
uncontrolled. The PI controller can be activated by means of
R100.

4.2 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.

4.3 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.

Other settings

All other settings can only be made by means of the R100.
Important parameters such as actual value of control parameter,
power consumption, etc. can be read via the R100.
If special or customized settings are required, use the Grundfos
PC Tool E-products. Contact your local Grundfos company for
more information.

5. Mechanical installation

The pump must be secured to a solid foundation by means of
bolts through the holes in the flange or baseplate.

5.1 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 104 °F (40 °C).
• Keep cooling fins and fan blades clean.

5.2 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 IP55 after removal of the drain
plug. Horizontally mounted pumps change enclosure class to
IP54.

6. Electrical connection

For description of how to connect E-pumps electrically, see the
following pages:

6.1 Single-phase pumps

, page 5

6.2 Three-phase pumps, 1 - 10 Hp

, page 6

6.3 Three-phase pumps, 15 - 30 Hp

, page 9.

Warning

Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.

Warning

If these safety instructions are not observed, it
may result in personal injury!

Warning

The surface of the product may be so hot that it
may cause burns or personal injury!

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If these safety instructions are not observed, it
may result in malfunction or damage to the
equipment!

1RWH

Notes or instructions that make the job easier
and ensure safe operation.

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