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7. Service
In order to ensure a long service life and
dosing accuracy, wearing parts such as
diaphragms and valves must be regularly checked
for signs of wear. Where necessary, replace worn
parts with original spare parts made from suitable
materials.
Should you have any questions, please contact your
service partner.
Warning
Maintenance work must only be carried out
by qualified staff.
7.1 Regular maintenance
Interval
Task
Check, if liquid leaks from the drain
opening (fig. 10, pos. 11) and if the
drain opening is blocked or soiled.
If so, follow the instructions given in
section
7.4 Diaphragm
Check, if liquid leaks from the dosing
Daily
head or valves.
If necessary, tighten dosing head
screws with a torque wrench at 4 Nm.
If necessary, tighten valves and cap
nuts, or perform service
(see
7.3 Perform
Clean all pump surfaces with a dry
Weekly
and clean cloth.
Check dosing head screws.
If necessary, tighten dosing head
Every
screws with a torque wrench at 4 Nm.
3 months
Replace damaged screws
immediately.
Every
2 years or
Replace diaphragm and valves
8000
(see
7.3 Perform
operating
hours*
*
For media which result in increased wear, the
service interval must be shortened.
7.2 Cleaning
If necessary, clean all pump surfaces with a dry and
clean cloth.
7.3 Perform service
Only spare parts and accessories from Grundfos
should be used for maintenance. The usage of
non-original spare parts and accessories renders
any liability for resulting damages null and void.
Further information about carrying out maintenance
can be found in the service kit catalogue on our
homepage (www.grundfos.com).
breakage.
service).
service)
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!
Before any work to the pump, the pump
must be disconnected from the power
Caution
supply. The system must be pressureless!
7.3.1 Dosing head overview
1
2
3
5
11
4
6
Fig. 10
Dosing head, exploded view
1
Safety diaphragm
2
Flange
3
O-ring
4
Diaphragm
5
Valve on discharge side
6
Valve on suction side
7
Dosing head
8
Screws with discs
9
Cover
10
Deaeration valve
11
Drain opening
7
8
9
10
19
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