Grundfos NBE Series, Инструкция по установке и эксплуатации

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1. Symbols used in this document
2. General information
These installation and operating instructions are a supplement to
installation and operating instructions for the corresponding
standard pumps TP, TPD, NK, NKG and NB, NBG.
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 single-phase or three-
phase mains connection.
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.
From factory, the pumps have been set to control mode
uncontrolled. The PI controller can be activated by means of
R100.
The pumps are typically used as circulator pumps in large heating
or cooling water systems with variable demands.
3.1 Settings
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.
All other settings are made by means of the R100.
Important parameters such as actual value of control parameter,
power consumption, etc. can be read via the R100.
3.2 Twin-head pumps
Twin-head pumps do not require any external controller.
4. Mechanical installation
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 IP 55 after removal of the drain
plug. Horizontally mounted pumps change enclosure class to
IP 54.
5. Electrical connection
For description of how to connect E-pumps electrically, see the
following pages:
5.1 Electrical connection – single-phase pumps , page 8
5.2 Electrical connection – three-phase pumps, 0.75-7.5 kW ,
page 10
5.3 Electrical connection – three-phase pumps, 11-22 kW ,
page 12.
Warning
If these safety instructions are not observed, it
may result in personal injury!
Warning
The surface of the product may cause burns or
personal injury!
Caution
If these safety instructions are not observed, it
may result in malfunction or damage to the
equipment!
Note
Notes or instructions that make the job easier
and ensure safe operation.
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Note
In order to retain the UL/cUL approval, follow the
additional installation procedures on page 771.
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