Operating Instructions
10/2010
1096.0799 | VU / VH Series
21
7 Maintenance and servicing
For pumps/aggregates in potentially explosive areas
(
ATEX additional instructions)
A qualified service team provides support for assembly and
repair works. Provide a certificate documenting the safety of
the media to be pumped (DIN safety data sheet or certifi-
cate of conformity) when ordering this service (
Certificate
of conformity, page 62).
7.1 Monitoring
Inspection intervals depend on the operational strain on the
pump/aggregate.
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.
DANGER
Risk of injuries caused by running aggregate!
►
Do not touch the running aggregate.
►
Do not carry out any works on the running aggregate.
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 aggregate.
1.
Check at appropriate intervals:
deposits on aggregate and separator (if available)
compliance with the operating liquid flow rate
compliance with the operating liquid temperature
compliance with the max. permissible compression
pressure
compliance with the limit values applicable to the de-
livery of liquids
power consumption of the drive
contamination of the drive
contamination of filters (if available)
running noise of the rolling bearings (motors)
normal operating conditions unchanged
2.
For trouble-free operation, ensure the following:
no dry running
tightness
no
cavitation
open gate valves at the suction side
free and clean filters
no unusual running noise or vibrations
no impermissible leaks at the shaft sealing
proper functioning of the auxiliary operating systems (if
available)
3.
Check shaft sealing:
Mechanical seals are maintenance-free sealing systems.
In case of leaks: Have the mechanical seal with auxil-
iary seals replaced by service staff or the manufac-
turer. Check auxiliary operating systems (if available)
for proper functioning or have them checked.
7.2 Lubrication intervals for rolling
bearings
Pump types VU 20 – 220 and VH 20 – 400 are equipped with
maintenance-free rolling bearings (sealed deep groove ball
bearings).
Pump types VU 300 – 1600 and VH 500 – 1600 are equipped
with rolling bearings which have to be maintained in regular
intervals.
Type
Interval
[h]
Amount of
lubricant per
bearing [g]
VU 300/450/500/600
VH 500/600
2000 8
VU 800 – 1600
VH 800 – 1600
2000 15
The lubrication intervals apply to bearing temperatures of up to
70°C. Temperature rises of 15°C require lubrication at half inter-
vals.
For initial filling, a high-temperature grease containing a poly-
urea-based thickener by Fuchs (Renolit PU-FH 300) is used.
7.3 Rinsing off contaminations
DANGER
Risk of injuries caused by hot, harmful or environmentally
hazardous media to be pumped!
►
Do not rinse when delivering harmful or environmentally
hazardous media with the aggregate.
►
Use protective equipment when carrying out any works on
the aggregate.
7.3.1
Minor fine-grained contamination
1.
Switch on the aggregate.
2.
Remove the screw plug U
e
(
Dimension drawing, page
46 et seq.).
3.
Collect contamination and escaping operating liquid and
dispose of in an environmentally-compatible way.
4.
Screw in the screw plug.
7.3.2
Major fine-grained contamination
►
Replace screw plug U
e
by a fitting.
►
Close fittings before switching on the aggregate.
►
Fill the pump with operating liquid up to the middle of the
shaft.
1.
Switch on the aggregate.
2.
Open the fittings for drainage.
3.
Collect contamination and escaping operating liquid and
dispose of in an environmentally-compatible way.
