Safety Instructions For The Operator/ User; Safety Instructions For Maintenance, Inspection And Installation Work; Unauthorised Modification And Manufacture Of Spare Parts; Improper Operating Methods - Grundfos 384-511 Instrucciones De Instalación Y Funcionamiento

5.4 Safety instructions for the operator/
user
Hazardous hot or cold parts on the servomotor must
be protected to prevent accidental contact.
Damage caused by electrical energy must be
prevented (for more details, see for example the
regulations of the VDE and the local electricity
supply company).
5.5 Safety instructions for maintenance,
inspection and installation work
The operator must ensure that all maintenance,
inspection and installation work is carried out by
authorised and qualified personnel, who have been
adequately trained by reading this manual.
All work on the servomotor should only be carried
out when the device is stopped.
All safety and protective equipment must be
immediately restarted or put into operation once
work is complete.
Observe the points described in the initial start-up
section prior to subsequent start-up.
Warning
Electrical connections must only be carried
out by qualified personnel.
Repairs must only be carried out by
authorised and qualified personnel.
Warning
When dosing dangerous media, the
corresponding safety data sheets MUST
be observed.
Wear protective clothing (gloves and
protective glasses) if required.
Before installing the servomotor, switch off
the pump and disconnect it from the
mains.
The stroke length of a DMX pump must
Caution
only be set when the pump is running.
5.6 Unauthorised modification and
manufacture of spare parts
Modification or changes to the device are only
permitted following agreement with the
manufacturer. Original spare parts and accessories
authorised by the manufacturer are safe to use.
Using other parts can result in liability for any
resulting consequences.

5.7 Improper operating methods

The operational safety of the supplied device is only
ensured if it is used in accordance with section
7. Technical data. The specified limit values must
under no circumstances be exceeded.
6

6. Device description

6.1 Versions

If a servomotor is ordered together with a dosing
pump, the servomotor is fitted onto the pump at the
factory and subjected to a function test. Once on
site, qualified specialist staff must establish the
relevant electrical connection.
Servomotors can also be supplied for retrofitting on a
dosing pump, together with the necessary mounting
material. Such servomotors also undergo testing at
the factory prior to delivery. Qualified specialist staff
must fit the servomotor onto the dosing pump and
establish the electrical connection.

6.2 Variants

6.2.1 Variants according to pump type
For DMX 221
• 1 servomotor for single pump
For DMX 226, DMH 25x/28x
• 1 servomotor for single pump
• 1 servomotor for duplex pump (only acts on one
dosing head)
• 2 servomotors for duplex pump
6.2.2 Control variants
• With reversing potentiometer, 1 kΩ
• With analogue control 4 (0) - 20 mA