Tabla De Contenido; Symbols Used In This Document; Applications; Liquids - Grundfos PM 2 Installation And Operating Instructions

Original installation and operating instructions.
CONTENTS
1. Symbols used in this document
2. Applications
2.1 Liquids
2.2 Liquid temperature
2.3 Operating pressure
3. Installation
3.1 Location
4. Electrical connection
4.1 Connecting units with cable and plug fitted
4.2 Connecting units with no cable and plug
fitted
4.3 Alternative power supply
5. Control panel
5.1 DIP switches
5.2 Enabling the DIP switch settings
5.3 Checking the DIP switch settings
6. Start-up
7. Operation
7.1 Start/stop according to water consumption 11
7.2 Start/stop with 1 bar differential pressure
7.3 Power supply failure
8. Functions
8.1 Auto-reset
8.2 Anti-cycling
8.3 Maximum continuous operating time
(30 minutes)
8.4 Dry-running protection
9. Frost protection
10. List of alarms
11. Technical data
12. Fault finding chart
13. Further product information
14. Disposal
Warning
Prior to installation, read these
installation and operating instructions.
Installation and operation must comply
with local regulations and accepted
codes of good practice.
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1. Symbols used in this document

Warning
If these safety instructions are not
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observed, it may result in personal
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injury!
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If these safety instructions are not
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observed, it may result in malfunction
Caution
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or damage to the equipment!
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Notes or instructions that make the job
Note
8 easier and ensure safe operation.
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2. Applications

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The Grundfos PM 2 is designed for automatic start/
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stop control of Grundfos pumps and other pumps for
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water supply. The PM 2 can be installed in systems
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with or without a pressure tank.
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Typical applications are water supply systems and
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rainwater systems in
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• single-family houses
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• blocks of flats
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• summer houses and holiday cottages
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• horticulture and gardening
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• agriculture.
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2.1 Liquids

Clean, thin, non-aggressive and non-explosive
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liquids without solid particles or fibres that may
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attack the unit mechanically or chemically.
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Examples:
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• drinking water
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• rainwater.
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2.2 Liquid temperature

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0 °C - see nameplate.

2.3 Operating pressure

Max. 10 bar.

3. Installation

Install the unit on the discharge side of the pump.
See fig. 2.
If pumping from a well, borehole or similar, always fit
a non-return valve on the suction pipe of the pump.
It is recommended to connect the unit to the piping
system using unions.
The outlet connection of the unit can be rotated
360 °. See fig. 1.
The inlet connection is an integrated part of the unit
housing.
The unit has a built-in non-return valve.