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Operating Instructions
22
1096.0799 | VU / VH Series
10/2010
7.4 Preventing
calcification
Calcification results in excessive wear of moistened pump
parts and increases the power consumption of the drive.
2 4 6 8 10 12 14 16 18 20 22 24
9,0
8,5
8,0
7,5
7,0
carbonate hardness
[°dH]
pH value
6,5
Area of protective coating
and calcification
Equilibrium curve
Area of
material abrasion
Fig. 18 Equilibrium characteristic
•
Operating liquid: Water
•
Water temperature: 17°C
►
pH value and carbonate hardness should intersect at a
point which lies maxi. 0.2 above the equilibrium curve to
avoid deposits and excessive corrosion in the aggregate.
►
Treat the operating liquid with a suitable agent.
7.5 Disassembly
DANGER
Risk of injuries caused by running aggregate!
►
Do not touch the running aggregate.
►
Do not carry out any works on the running aggregate.
►
Prior to carrying out any assembly or maintenance works,
de-energize the motor and protect it against restart.
RISK OF ELECTRIC SHOCK
Risk of death from electric shock!
►
Any electrical works must be carried out by qualified electri-
cians only.
►
Observe the IEC 30364 (DIN VDE 0100) and for potentially
explosive areas the IEC 60079 (DIN VDE 0165) standard.
WARNING
Risk of injuries caused by vacuum and harmful media to be
pumped and operating liquid!
►
Use protective equipment when carrying out any works on
the pump/aggregate.
►
Make sure the pump/aggregate is depressurized.
►
Drain the pump. Reliably collect operating liquid and media
to be pumped and dispose of in an environmentally-
compatible way.
7.5.1
Return to manufacturer
Aggregate
shut
down
Aggregate
depressurized
Pump completely drained
Electrical connections isolated and motor secured
against re-start
Auxiliary operating systems shut down, depressurized
and drained (if available)
Connecting pipes removed
Manometer lines, manometer and fixtures removed
1.
Loosen the fixing screws.
2.
Lift the aggregate out of the system (
Transport, page 11).
3. Decontaminate
pump/aggregate.
4.
Attach transport and sealing covers.
5.
Send a certificate of conformity to the manufacturer.
If required, request a certificate of conformity from the
manufacturer.
7.5.2 Spare
parts
Spare parts are available from your supplier or the manu-
facturer.
The following data are required for spare part orders.
•
Number of the pump/aggregate
(
Nameplate, page 9)
•
Type of pump/aggregate
(
Nameplate, page 9)
•
Item number of spare part
(
Cross-sectional drawing, page 48 et seq.)
•
Designation of spare part
(
Cross-sectional drawing, page 48 et seq.)
•
Number of spare parts
7.5.3 Pump/aggregate
repairs
1.
The following must be observed during assembly:
Worn parts must be replaced by original spare parts.
Replace the seals.
Observe the specified tightening torques
(
Tightening torques, page 42).
2.
Clean all parts.
3.
Install the pump/aggregate inside the system
(
Set-up and connection, page 14).