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DANGER
Electric shock
Death or serious personal injury
‐
It must be possible to lock the main
switch in position 0. Type and
requirements as specified in EN
60204-1.
WARNING
Crushing hazard
Death or serious personal injury
‐
Do not turn the impeller by hand.
Always use an appropriate tool.
Maintenance schedule
Before initial startup or after a longer period of
storage:
•
Check the insulation resistance.
•
Check the fill level in the sealing chamber.
•
Check possible damage on the axial face seal.
Monthly:
•
Monitor the power input and voltage.
•
Check the used switchgears for
resistance and sealed space control.
Every six months:
•
Inspect the power supply cable.
•
Inspect the cable holder and wiring.
•
Inspect the accessories, such as the suspension
device and hoisting gears.
After 3000 operating hours:
•
Perform visual check of the pump and inspect the
wear ring.
•
Check the oil level and condition. Change the oil.
Change the shaft seal in case of water ingress or
oil leakage.
•
Check the hydraulic components and wear ring for
wear. Replace if necessary.
After 8 000 operating hours or two years:
•
Check the insulation resistance
•
Empty the leakage chamber. Not available for
all models. For more information, contact
Grundfos.
•
Inspect all safety and control devices.
•
Check the coating and touch-up as required.
After 15 000 operating hours or five years:
•
General overhaul.
If the pump is used in highly abrasive or
corrosive matter, the maintenance
intervals should be reduced.
Tightening torques
A2/A4,
Hardness
class 70
DIN912 / DIN933
M6
7 Nm
M8
17 Nm
M10
33 Nm
M12
57 Nm
M16
140 Nm
M20
273 Nm
Oil check and change
Use original parts only.
Use Shell Ondina X420 oil or equivalent
type.
Dispose of used oil must comply with local
regulations
CAUTION
Pressurised system
Minor or moderate personal injury
‐
The oil chamber may be under
pressure. Loosen the screws carefully
and do not remove them until the
pressure has been completely relieved.
After 3000 operating hours or at least once
a year, change the oil in the oil chamber as
described below. If the shaft seal has been
changed, the oil must be changed as well.
When the pump is new or the shaft seal is replaced,
check the oil level and water content after one week
of operation. If there is more than 20 % extra liquid
(water) in the oil chamber, the shaft seal is defective.
The table below states the quantity of oil in the oil
chamber:
A2/A4,
Hardness class
80
11.8 Nm
28.7 Nm
58 Nm
100 Nm
245 Nm
494 Nm
13
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