Grundfos S 50 Series, Инструкция по установке и эксплуатации

Страница: 28 / 38

English (GB)
28
Upright position
Proceed as follows:
1. Identify the screws A, B and C and their positions relative to
each other. See fig. 32 .
Fig. 33 Correct oil level of upright pump
2. Use screw B for indication of the level of oil in the oil chamber.
See fig. 33 .
3. When the pump is upright, the oil has to be pumped out of the
oil chamber. Use a suction pump with a flexible suction hose
that can be inserted deep into the oil chamber.
4. Pump out the oil using all the screw holes in turns so as to
reach all sections of the interior of the oil chamber. Collect the
drained oil in a clean container.
5. Replace the O-rings, refit screw C and tighten securely. Fill
the oil chamber with oil to the correct level. Refit screws A and
B and tighten securely.
8.4 Inspection and adjustment of impeller clearance
The correct axial clearance is 0.7 mm ± 0.2. Reset the clearance
if it is 0.7 mm or more. The method for resetting the clearance is
different for submersible pumps, installation types S, C and ST,
and for dry-installed pumps, installation types D and H. For dry-
installed pumps there are two methods.
All methods are described here.
8.4.1 Submersible pumps, installation types S, C and ST
Submersible pumps have a separate, adjustable pump inlet cover
which may be shaped as an inlet bell. Locate the six fastening
screws of the inlet cover and the three set screws.
Use a feeler gauge to check the clearance between the impeller
and the inlet cover all around the perimeter of the inlet opening.
See fig.
34 .
1. Loosen the set screws by two full turns each.
2. Close the impeller clearance by lightly tightening the fastening
screws diagonally until the impeller touches the pump
housing.
3. Loosen the fastening screws to make an 0.7 mm gap under
the heads of the fastening screws. See fig. 34 .
4. Tighten the set screws tightly.
5. Tighten the fastening screws diagonally.
Fig. 34 Impeller clearance adjustment
T
M
02
4
0
0
5
46
01
A
B
DANGER
Overhead load
Death or serious personal injury
- Never work under a pump
when it is hanging from crane.
Before adjusting the clearance,
clean the gap between impeller
and inlet cover.
Do not use too much force when
tightening the fastening screws
as this may damage the bearings.
The movement is usually 1 to 3
mm.
TM
05
19
16
39
11
0.
7
Set screw
Fastening screw Fastening screw