Grundfos PM 2 User Manual

6
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document 6
2. Applications 6
2.1 Liquids 6
2.2 Liquid temperature 6
2.3 Operating pressure 6
3. Installation 6
3.1 Location 7
4. Electrical connection 8
4.1 Connecting units with cable and plug fitted 8
4.2 Connecting units with no cable and plug
fitted 8
4.3 Alternative power supply 8
5. Control panel 9
5.1 DIP switches 10
5.2 Enabling the DIP switch settings 11
5.3 Checking the DIP switch settings 11
6. Start-up 11
7. Operation 11
7.1 Start/stop according to water consumption 11
7.2 Start/stop with 1 bar differential pressure 11
7.3 Power supply failure 12
8. Functions 12
8.1 Auto-reset 12
8.2 Anti-cycling 12
8.3 Maximum continuous operating time
(30 minutes) 12
8.4 Dry-running protection 12
9. Frost protection 13
10. List of alarms 13
11. Technical data 14
12. Fault finding chart 15
13. Further product information 16
14. Disposal 16
1. Symbols used in this document
2. Applications
The Grundfos PM 2 is designed for automatic start/
stop control of Grundfos pumps and other pumps for
water supply. The PM 2 can be installed in systems
with or without a pressure tank.
Typical applications are water supply systems and
rainwater systems in
• single-family houses
• blocks of flats
• summer houses and holiday cottages
• horticulture and gardening
• agriculture.
2.1 Liquids
Clean, thin, non-aggressive and non-explosive
liquids without solid particles or fibres that may
attack the unit mechanically or chemically.
Examples:
• drinking water
• rainwater.
2.2 Liquid temperature
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.
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!
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.

Grundfos PM 2 Specifications

General

Brand	Grundfos
Model	PM 2
Category	Controller
Language	English