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MAGDOS
BW 1 02 98 / 1
Lutz-Jesco GmbH
Improved changes are always reserved without notice.
Operating and Maintenance Instructions
metering pump fails. We recommend installing leakage
probes and containment tanks.
Metering pumps are produced according to highest
quality standards and have a long service life.
Nevertheless some parts are subject to wear (e.g
diaphragm, valve seats, valve balls). To ensure long
operating life, visual checks are required regularly.
Operating and maintenance personnel must be able
to access the pump easily. Periodic maintenance
protects the metering pump against shutdowns.
To increase the metering accuracy and reliability, we
recommend using additional fittings. These include
backpressure valves, relief valves, leakage probes,
and chemical low level indicators, as shown in figures
1 to 3.
Always use appropriate tools for the installation of
plastic connecting parts. In order to avoid damage,
never apply excessive force; plastic parts (especially
PVC parts) can be screwed and unscrewed more
easily if the thread is lubricated with vaseline or
silicone grease before.
Note: For this purpose, the compatibility with the
chemical to be metered must be checked.
MAGDOS metering pumps with integrated level
control function are equipped with a short-circuit jack
plug which must be removed before connecting a
level control by means of a jack plug. To keep the
protection class, screw a PG plastic sleeve on the
jack plug. The required PG sleeve is part of the level
control (also in combination with a suction line).
Mounting the metering pump directly on the water
meter may result in noise level amplification. In this
case, it is recommended to mount the pump on
separate wall brackets which, for the same reason,
should be fixed to outer walls instead of interior walls
with adjacent occupied rooms. It is also possible to
mount the pump directly on the metering supply
tank.
Ambient temperatures exceeding 40°C are not
permitted. Radiant heat of apparatus and heat
exchangers must be kept in limits allowing the pump
to sufficiently dissipate its own heat. Exposure to
direct sunlight should be avoided especially for mete-
ring pumps with plastic housings because the black
plastic material can be damaged. If the pump is
installed outside, provide an enclosure to protect it
against weather.
Wiring of the MAGDOS metering pump must be
carried out by a specialist according to the local
regulations. Normally the MAGDOS is connected
with a safety plug. The electrical data for all MAGDOS
data is listed in Table 14 "Technical data".
Note: The MAGDOS metering pumps are not suited
to be used in explosive environments.
Do not lay signal cables of water meters or
0(4)...20mA controls parallel to high-voltage current
Keep the operating instructions of the metering
pump and the accessories readily accessible.
List of contents
1. General
2. Scope of delivery
3. Installation
4. Injection fitting installation
5. Safety instructions
6. Installation example
7. Startup
8. Replacing the diaphragm
9. Drive solenoids
10. Correction of stroke length setting
11. Control panel
12. Circuit diagrams
13. Functional overview
14. Technical data
15. Troubleshooting
1. General
Solenoid metering pumps can be used in many
applications. It is a particular advantage that they can
be controlled proportionally to water meter contacts.
They are also suited to be used as regulating units in
automatic control systems. See table 13 for various
control types and monitoring facilities.
2. Scope of delivery
Be careful when unpacking the metering pump and
possible accessories in order not to miss small
parts. Compare the scope of delivery to the delivery
note. If there are any discrepancies, try to find out the
reason.
3. Installation
For selection of a pump during construction of a plant
as well as for installation and operation, the local
rules must be observed. This applies to the selection
of suitable pump materials, the handling of the
chemicals and the electrical installation. At the
same time the technical data of the metering pump
according to table 12 must be considered, and the
plant must be designed correspondingly (e.g. pressure
loss in lines depending on nominal diameter and
length).
Both, the designer and the user are responsible to
make sure that the whole plant including the mete-
ring pump is constructed so that neither plant
equipment nor buildings are severely damaged in the
case of chemical leakage due to the failure of wear
parts (e.g. diaphragm rupture) or burst tubing. When
constructing chemical plants, the installation must
be carried out so that no consequential damages
appear which are unreasonably high even if the