Grundfos DMH 25X, Installation And Operating Instructions Manual

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English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Identification of safety instructions in this manual . . . . . . . 5
2.2 Qualification and training of personnel . . . . . . . . . . . . . . 5
2.3 Risks when safety instructions are not observed. . . . . . . . 5
2.4 Safety-conscious working. . . . . . . . . . . . . . . . . . . . . . 5
2.5 Safety instructions for the operator/user . . . . . . . . . . . . . 5
2.6 Safety instructions for maintenance, inspection and
installation work . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7 Unauthorised modification and manufacture of spare
parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8 Improper operating methods . . . . . . . . . . . . . . . . . . . . 6
2.9 Safety of the system in the event of a failure in the
dosing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Pump models and pump types . . . . . . . . . . . . . . . . . . 9
3.3 Pump performance. . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Sound pressure level . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Electrical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.6 AR control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.7 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8 Ambient and operating conditions. . . . . . . . . . . . . . . . 12
3.9 Dosing medium . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4. Transport and storage. . . . . . . . . . . . . . . . . . . . . . 13
4.1 Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Intermediate storage. . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. Product description and accessories . . . . . . . . . . . . 14
5.1 General description . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4 Stroke volume . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.6 Data of contact pressure gauge for diaphragm leakage
detection (optional) . . . . . . . . . . . . . . . . . . . . . . . . 22
6. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1 General information on installation . . . . . . . . . . . . . . . 23
6.2 Installation location . . . . . . . . . . . . . . . . . . . . . . . . 23
6.3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.4 Approximate values when using pulsation dampers . . . . . 23
6.5 Optimum installation . . . . . . . . . . . . . . . . . . . . . . . . 25
6.6 Installation tips . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.7 Tube / pipe lines . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.8 Connecting the suction and discharge lines. . . . . . . . . . 27
7. Electrical connections. . . . . . . . . . . . . . . . . . . . . . 28
7.1 Electric servomotor (optional) . . . . . . . . . . . . . . . . . . 28
7.2 Electronic preselection counter (optional) . . . . . . . . . . . 28
7.3 Electrically heated dosing head (optional) . . . . . . . . . . . 28
7.4 Diaphragm controller (optional) . . . . . . . . . . . . . . . . . 29
7.5 Connecting the power supply cable. . . . . . . . . . . . . . . 29
8. Start-up/shutdown . . . . . . . . . . . . . . . . . . . . . . . . 30
8.1 Initial start-up/subsequent start-up . . . . . . . . . . . . . . . 30
8.2 Start-up/subsequent start-up of DMH 251, 252 and 253 . . 30
8.3 Start-up/subsequent start-up of DMH 254, 255 and 257 . . 31
8.4 Setting the pressure relief valve . . . . . . . . . . . . . . . . . 32
8.5 Zero point adjustments . . . . . . . . . . . . . . . . . . . . . . 32
8.6 Operating the pump . . . . . . . . . . . . . . . . . . . . . . . . 33
8.7 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1 Switching on/off. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2 Setting the dosing capacity. . . . . . . . . . . . . . . . . . . . 34
9.3 Using the AR control unit (optional). . . . . . . . . . . . . . . 34
9.4 Electric servomotor (optional) . . . . . . . . . . . . . . . . . . 34
9.5 Electronic preselection counter (optional) . . . . . . . . . . . 34
9.6 Electrically heated dosing head (optional) . . . . . . . . . . . 34
10. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10.1 General notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10.2 Diaphragm leakage control for diaphragm leakage
detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10.3 Cleaning and maintenance intervals . . . . . . . . . . . . . . 35
10.4 Checking the oil level . . . . . . . . . . . . . . . . . . . . . . . 35
10.5 Cleaning the suction and discharge valves . . . . . . . . . . 35
10.6 Replacing the diaphragm and gear oil for dosing head
with single diaphragm (no diaphragm leakage
detection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.7 Replacing the diaphragm for dosing head with double
diaphragm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11. Fault finding chart . . . . . . . . . . . . . . . . . . . . . . . . 41
12. Dosing curves . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
13. Disposing of the product . . . . . . . . . . . . . . . . . . . . 43
1. General information
Read this document before you install the product. Instal-
lation and operation must comply with local regulations
and accepted codes of good practice.
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 Applications
The DMH 25X pump is suitable for liquid, non-abrasive and non-
flammable media strictly in accordance with the instructions in this
manual.
Note
Explosion-proof pumps are identified from the pump and
motor nameplates. An EC declaration of conformity is pro-
vided 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 explo-
sion-proof pump for the dosing of inflammable media or
for operation in potentially explosive operating sites in ac-
cordance 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 ac-
cepts no liability for any damage resulting from incorrect
use.
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English (GB)