Grundfos DMX 226 Instructions Manual page 6

Operation with other electronics
Warning
Electrical connections must only be carried
out by qualified personnel!
Disconnect the power supply before
connecting the power supply cable and the
relay contacts!
Observe the local safety regulations!
Protect the cable connections and plugs
from corrosion and moisture.
Warning
The potential-loaded contact 1, terminals 6
and 7, is loaded with supply voltage.
Switch off the power supply before
connecting contact 1!
Warning
Do not open the electronics or sensor!
Repairs must only be carried out by
authorised and qualified personnel!
Integral relief valve
Warning
Dosing heads with integral relief valve
must not be used for abrasive or
crystallising media.
Warning
Never start the pump if the overflow line is
not correctly connected to the relief valve.
Warning
Settings on the relief valve must only be
carried out by authorised and qualified
personnel!
Warning
Never set the opening pressure to values
higher than the maximum permissible
operating pressure of the dosing system
and dosing pump.
Warning
When dosing dangerous media, observe
the corresponding safety precautions!
Wear protective clothing (gloves and
goggles) when working on the dosing
head, connections or lines!
6
Maintenance
Warning
When dosing dangerous media, observe
the corresponding safety precautions!
Risk of chemical burns!
Wear protective clothing (gloves and
goggles) when working on the dosing
head, connections or lines!
Do not allow any chemicals to leak from
the pump. Collect and dispose of all
chemicals correctly!
Warning
The pump housing must only be opened
by personnel authorised by Grundfos!
Repairs must only be carried out by
authorised and qualified personnel!
Switch off the pump and disconnect it from
the power supply before carrying out
maintenance work and repairs!
Warning
The gear grease must only be changed by
authorised and qualified personnel.
For this purpose, send the pump to
Grundfos or an authorised service
workshop.
Disposal
The crossed-out wheelie bin symbol on
a product means that it must be
disposed of separately from household
waste. When a product marked with this
symbol reaches its end of life, take it to a
collection point designated by the local
waste disposal authorities. The separate collection
and recycling of such products will help protect the
environment and human health.