Grundfos DMH 25 Series, Installation And Operating Instructions Manual

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English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. General information
1.1 Introduction
These installation and operating instructions contain all the
information required for starting up and handling the DMH 25X
piston diaphragm dosing pump.
If you require further information or if any problems arise, which
are not described in detail in this manual, please contact the
nearest Grundfos company.
1.2 Service documentation
If you have any questions, please contact the nearest Grundfos
company or service workshop.
1.3 Applications
The DMH 25X pump is suitable for liquid, non-abrasive and
non-inflammable media strictly in accordance with the
instructions in this manual.
1. General information
2
1.1 Introduction 2
1.2 Service documentation 2
1.3 Applications
2
2. Safety 3
2.1 Identification of safety instructions in this manual 3
2.2 Qualification and training of personnel 3
2.3 Risks when safety instructions are not observed 3
2.4 Safety-conscious working 3
2.5 Safety instructions for the operator/user 3
2.6 Safety instructions for maintenance, inspection and
installation work
3
2.7 Unauthorised modification and manufacture of spare
parts
4
2.8 Improper operating methods 4
2.9 Safety of the system in the event of a failure in the
dosing system
4
3. Technical data 4
3.1 Identification
4
3.2 Type key 5
3.3 Pump types 7
3.4 Pump performance
7
3.5 Sound pressure level 10
3.6 Electrical data 10
3.7 AR control unit
10
3.8 Power supply
10
3.9 Ambient and operating conditions 10
3.10 Dosing medium 11
4. Transport and storage
11
4.1 Delivery 11
4.2 Unpacking 11
4.3 Intermediate storage
11
4.4 Return 11
5. Product description and accessories 12
5.1 General description 12
5.2 Dimensional sketches 16
5.3 Weight 18
5.4 Stroke volume 18
5.5 Materials
18
5.6 Data of contact pressure gauge for diaphragm leakage
detection (optional)
18
6. Installation
18
6.1 General information on installation 18
6.2 Installation location 18
6.3 Mounting
18
6.4 Approximate values when using pulsation dampers 19
6.5 Optimum installation 20
6.6 Installation tips
21
6.7 Tube / pipe lines 22
6.8 Connecting the suction and discharge lines 22
7. Electrical connections
23
7.1 Electric servomotor (optional) 23
7.2 Electronic preselection counter (optional) 23
7.3 Electrically heated dosing head (optional) 23
7.4 Diaphragm controller (optional)
23
7.5 Connecting the power supply cable 24
8. Start-up/shutdown 24
8.1 Initial start-up/subsequent start-up
24
8.2 Start-up/subsequent start-up of DMH 251, 252 and 253 25
8.3 Start-up/subsequent start-up of DMH 254, 255 and 257 25
8.4 Setting the pressure relief valve
26
8.5 Zero point adjustments 27
8.6 Operating the pump 27
8.7 Shutdown 27
9. Operation
28
9.1 Switching on/off 28
9.2 Setting the dosing capacity 28
9.3 Using the AR control unit (optional) 28
9.4 Electric servomotor (optional) 28
9.5 Electronic preselection counter (optional) 28
9.6 Electrically heated dosing head (optional) 28
10. Maintenance 28
10.1 General notes
28
10.2 Diaphragm leakage control for diaphragm leakage
detection 28
10.3 Cleaning and maintenance intervals
29
10.4 Checking the oil level 29
10.5 Cleaning the suction and discharge valves 29
10.6 Replacing the diaphragm and gear oil for dosing head
with single diaphragm (no diaphragm leakage
detection)
30
10.7 Replacing the diaphragm for dosing head with double
diaphragm
31
11. Fault finding chart 34
12. Dosing curves 36
13. Disposal 49
Warning
These complete installation and operating
instructions are also available on www.grundfos.com.
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Note
Explosion-proof pumps are identified from the pump
and motor nameplates. An EC declaration of
conformity is provided in accordance with the EC
directive 2014/34/EU, the so-called ATEX directive.
This declaration of conformity replaces the
declaration of conformity in this manual.
Warning
To operate a pump which has been identified as an
explosion-proof pump for the dosing of inflammable
media or for operation in potentially explosive
operating sites in accordance with the EC directive
2014/34/EU, refer to the enclosed manual
"ATEX-approved pumps" in addition to this manual.
Warning
Other applications or the operation of pumps in
ambient and operating conditions, which are not
approved, are considered improper and are not
permitted. Grundfos accepts no liability for any
damage resulting from incorrect use.