Oil Check And Oil Change; Inspection And Adjustment Of Impeller Clearance - Grundfos S1 Instrucciones De Instalación Y Funcionamiento

10.1 Oil check and oil change

Change the oil every four years to prevent
Caution
oxidation.
The oil chamber has two screws, A and B, for oil drainage, oil
filling and level control.
In pumps with 8- or 10-pole motors of 30-67 hp (22-50 kW) and
pumps with motors larger than 67 hp (50 kW), the oil can be
changed while the pump is standing upright. The screw B is used
for the indication of the oil level in the oil chamber, see fig. 16.
Fig. 16 Oil level, vertical installation
Horizontally installed pumps (installation type H) have a third
screw, C, for oil drainage.
On horizontally installed pumps (installation type H), the oil
screws are always positioned as shown in fig. 17.
Fig. 17 Oil level, horizontal installation
Proceed as follows:
1. Place the pump in such a position that the screw A is pointing
upwards.
Warning
When slackening the screw A of the oil chamber,
note that pressure may have built up in the
chamber. Do not remove the screw until the
pressure has been fully relieved.
2. Place a clean container under the pump to collect all the
drained-off oil. Slacken the screw B pointing to the side and
observe the oil level. The drained-off quantity of oil indicates
whether the lower mechanical shaft seal is leaking, which may
be normal.
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3. Turn the pump or remove the screw C and allow all the oil to
drain from the chamber into the container. Pour an oil sample
into a glass container and observe the condition of the oil.
Clear oil can be reused.
Emulsified oil must be changed and disposed of.
Used oil must be disposed of in accordance with
Note
Note
local regulations.
Low oil level may indicate that the upper mechanical shaft seal is
defective. Contact an authorized service workshop for further
overhaul of the pump and repair, if required.
4. Fill the oil chamber with oil through the top hole A until the oil
level reaches the hole B. Replace the O-rings with new rings,
insert the screws and tighten securely.
Warning
Use viscosity grade SAE 10 W 30 or
ONDINA X420.

10.2 Inspection and adjustment of impeller clearance

Warning
Check impeller clearance every time service is
carried out to prevent hot surfaces in the
hydraulic parts.
All S1, S2 and S3 pumps have an axial impeller clearance
between 0.020 and 0.035 inches (0.5 and 0.9 mm).
If the clearance is 0.047 inches (1.2 mm) or more, adjust it to
between 0.020 and 0.035 inches (0.5 and 0.9 mm) at all points.
It is not possible to adjust the impeller clearance
Note
Note
of SV pumps.
The impeller clearance of installation types S and C can be
inspected directly through the pump inlet.
Warning
Before inspection make sure that the motor is
switched off and that the mains switch is locked
in position 0.
Installation versions D and H can be inspected and adjusted with
the pump installed on the stand and connected to the pipework.
Inspect and adjust the impeller clearance as described in section
10.2.2 Installation types D and H, range 50-54 and section
10.2.3 Installation types D and H, range 58-70.