Cleaning And Inspecting The Pump - Grundfos SE1 50 Installation And Operating Instructions Manual

Power [kW]
4-pole
Draining of oil
Proceed as follows:
1. Place the pump on a plane surface with one oil
screw pointing downwards.
2. Place a suitable container (approximately 1 litre),
for instance made of transparent plastic material,
under the oil screw.
WARNING
Pressurised system
Death or serious personal injury
- As pressure may have built up in the oil
chamber, loosen the screws slowly, and
do not remove the screws until the
pressure has been fully relieved.
3. Loosen and remove the lower oil screw.
4. Remove the upper oil screw and allow the oil to
drain into the container.
– Check that the quantity of oil corresponds to
the quantity stated in table above. If the
quantity is smaller than stated, the shaft seal is
defective and must be replaced.
– Check the water content in the oil by allowing
the oil and water to separate. If the quantity of
water exceeds 20 %, the shaft seal is defective
and must be replaced. If the shaft seal is not
replaced, the motor will be damaged.
5. Clean the faces for the gaskets for oil screws.
Dispose of used oil in accordance with
local regulations.
Filling with oil
1. Turn the pump so that the oil filling holes are
placed opposite each other, pointing upwards.
26
Oil quantity [l]
1.0
1.3
0.30
1.5
2.2
3.0
4.0 0.55
5.5
7.5 0.70
Oil filling/venting
Fig. 17 Oil filling holes
2. Pour oil into the oil chamber through one filling
hole until it starts coming out of the other hole.
3. Fit the oil screws with new gaskets.

8.3 Cleaning and inspecting the pump

Clean the pump on site at regular intervals by
following this procedure:
• Lift the pump out of the pit.
• Hose down the pump externally using a high-
pressure cleaner at maximum 100 bar.
• Remove caked dirt from the motor to ensure
good heat conductivity. You may use a mild
detergent approved for disposal into the sewage
system.
• If necessary, you may scrub the pump using a
soft brush.
Visual inspection of the pump must include the
following points:
• Search for cracks or other external damage.
• Check the lifting bracket and lifting chain for wear
and corrosion.
• Inspect the power cable for cracks, lacerations,
kinks or other damage in the sheath.
• Inspect the visible parts of the cable entry for
cracks.
• Check that the cable is firmly connected to the
top cover.
• Check all visible screws for self-loosening and
tighten them, if necessary.
The pump is fitted with a vent valve at the bottom of
the cooling jacket. The valve may be removed and
cleaned, if necessary. Clean the vent hole before
refitting the valve after cleaning.