Coupling Alignment - Xylem LOWARA ESH ATEX Manuel D'installation, D'utilisation Et Entretien

8. Use concrete to set the foundation bolts
into the foundation.
9. Wait until the concrete has set firmly, and
then level the baseplate.
10. Tighten the foundation bolts evenly and
firmly.
Note:
•
For baseplates, it is recommended
to grout the baseplate with low-
shrinkage concrete.
•
If the transmission of vibrations can
be disturbing, provide vibration-
damping supports between the
pump and the foundation.
Mount the pump to a base frame
Check that the following are adhered to:
•
Solid base frame which does not twist or
vibrate during operation (resonance).
•
Mounting surfaces of the pump feet and
the motor on the base frame must be flat
(machining is recommended).
•
Safe fastening of pump and motor must
be guaranteed.
•
Adequate space between pump and
motor shaft must be left depending on the
used coupling.
•
Between pump and base frame must be
an adequate shimming, so that in case of
replacement the same height between
bottom and centerline can be adjusted
(recommended vertical adjustment 4-6
mm).
4.4.2 Piping checklist
Check that the following are adhered to:
•
The suction lift line has been laid with a
rising slope, at positive suction head line
with a downward slope towards the pump.
•
The nominal diameters of the pipelines
are at least equal to the nominal
diameters of the pump ports.
•
The pipelines have been anchored in
close proximity to the pump and
connected without transmitting any
stresses or strains.
ATTENTION:
Welding beads, scale and other
impurities in the piping damage the
pump.
•
Free the piping from any impurities.
•
If necessary, install a filter.
4.4.3

Coupling alignment

After mounting to the foundation and the
connection of the piping, the coupling must be
adjusted again, even if the unit was delivered
completely mounted on the frame.
Remove the coupling guard
'Metal sheet' type
For information see Figure 17.
1. Unscrew the fixing devices (2).
2. Open the lift guard (1).
– Do not loosen screws, washers and
nuts.
Alignment
For information see Figure 18.
1. Loosen screws of the support and pump
foot.
2. Place the ruler (1) axially on both coupling
halves.
3. Leave the ruler (1) in this position and
turn the coupling by hand.
– The coupling is aligned correctly if
the distances 'a' and 'b' to the
respective shafts are the same at all
points around the circumference.
– The radial and axial deviation
between the two coupling halves
must not exceed the values set by
the manufacturer, during standstill
as well as at operating temperature
and under inlet pressure.
DANGER: Danger of explosion of
the coupling
The coupling may explode if the
maintenance intervals are not
complied with, or if the maximum
permitted torsional backlash is
exceeded:
• Risk of serious injury due to the
projection of fragments
• Risk of explosion in potentially
explosive atmospheres.
Strictly comply with the coupling
maintenance instructions found in this
manual, and check the wear of
elastomer components.
4. Check the distance between the two
coupling halves around the circumference
with a gauge (2).
– The coupling is aligned correctly if
the distance between the two
coupling halves is the same at all
points around the circumference.
– The radial and axial deviation
between the two coupling halves
must not exceed the values set by
the manufacturer, during standstill
as well as at operating temperature
and under inlet pressure.
5. Re-tighten screws of the support and
pump foot without transmitting any
stresses and strains.
Dial gauges can be used in the place of ruler
and thickness gauge.
For any request of information, contact the
Xylem or the Authorised Distributor.
NOTE: Check alignment of coupling again in
operation warm condition and on system
pressure if available and correct, if necessary.
Be sure that the unit can be easily turned by
hand.
NOTICE:
Improper alignment of the unit can lead to
damages at coupling and unit.
en - Original instructions
27