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3. Service
3.1 Perform service
3.1.1 Dismantling the diaphragm and valves
3.1.2 Reassembling the diaphragm and valves
3.2 Diaphragm breakage
3.2.1 Dosing liquid in the pump housing
3.3 Operation with loose dosing head
screws
3.4 Repairs
4. 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.
Warning
Risk of chemical burns!
When dosing dangerous media, observe
the corresponding precautions in the
safety data sheets!
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!
Caution
Before any work to the pump, the pump
must be disconnected from the power
supply. The system must be pressureless!
Warning
Danger of explosion, if dosing liquid has
entered the pump housing!
If the diaphragm is possibly damaged or if
the pump was operated with damaged or
loose dosing head screws, don’t connect
the pump to the power supply!
Caution
Cross-tighten the dosing head screws with
a torque wrench once before
commissioning and again after 2-5
operating hours at 5.5 Nm (+ 0.5/- 0 Nm).
Warning
Danger of explosion, if dosing liquid has
entered the pump housing!
Operation with damaged diaphragm can
lead to dosing liquid entering the pump
housing.
In case of diaphragm breakage,
immediately separate the pump from the
power supply!
Make sure the pump cannot be put back
into operation by accident!
Dismantle the dosing head without
connecting the pump to the power supply
and make sure no dosing liquid has
entered the pump housing.
Warning
Danger of explosion!
Immediately separate the pump from the
power supply!
Make sure the pump cannot be put back
into operation by accident!
Warning
Danger of explosion, if dosing liquid has
entered the pump housing!
Operation with damaged or loose dosing
head screws can lead to dosing liquid
entering the pump housing.
If the pump was operated with damaged or
loose dosing head screws, immediately
separate the pump from the power supply!
Make sure the pump cannot be put back
into operation by accident!
Dismantle the dosing head without
connecting the pump to the power supply
and make sure no dosing liquid has
entered the pump housing.
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 voltage supply before carrying out
maintenance work and repairs!
Note
The replacement of the supply cable must
be carried out by an authorised Grundfos
service workshop.
Caution
The pump must be cleaned prior to
dispatch!
If dosing liquid has possibly entered the
pump housing, state that explicitly in the
safety declaration!
