Maintenance
4990671000 February 2008
29
Maintenance
7.
Maintenance
7.1
Warranty
Damage due to non-compliance with the installation
and operating instructions are not covered by the war-
ranty.
Please note that repairs to the liquid ring pump must be
made by an authorized repair centre using original
parts. Otherwise the warranty will be invalid.
7.2
Maintenance, maintenance
schedule
When carrying out maintenance or inspection,
observe the safety instructions (chapter 2.
"Safety instructions and hazard alerts").
Machine failure due to poor or improper maintenance
can result in high repair costs and machine down time.
Regular maintenance is therefore necessary.
The operating, safety and service life of the machine
are largely determined by the level of maintenance un-
dertaken.
The table below contains time, type and maintenance
work information for normal service of the liquid ring
pump.
The specified maintenance intervals assume approxi-
mately 5 hours of pump service per day. If your service
conditions are different, the maintenance intervals may
be proportionally shorter or longer.
As operating conditions may vary, no forecast can be
made as to how often the necessary wear inspections,
maintenance and general inspections should be made.
Decide on the most suitable arrangement in the light of
your conditions.
Refit all guards properly after completion of any
maintenance work.
Dispose of grease, cleaners and spent compo-
nents, e.g., filter cartridges, as prescribed by
the environment laws.
7.2.1
Water back-cooling with air
The flow of cooling air must not be obstructed.
•
Remove dust and dirt from the cooler every week.
•
Inspect the operating water level in the compensa-
tion tank and top up water if necessary.
7.2.2
Liquid ring pump
•
Clean the machine every week.
7.2.3
Vacuum filter (GDD types)
Depending on the dust load, daily cleaning may be
necessary; clean at least once every week.
The filter insert consists of either a stainless steel
mesh or a fine filter cartridge.
Maintenance points
Type of work
See chapter
Maintenance interval
1 week
1 month
3 months
Cooling unit/water cooler
clean
7.2.1
X
Liquid ring pump
clean
7.2.2
X
Vacuum filter
clean
7.2.3
X
Safety valve
check
6.2.1
X
Water stop valve
check
6.2.2
X
Vee belts, Vee belt tension
inspect,
re-tension
7.2.4
X
Non-return valve
check
7.2.5
X
Shaft seal lubrication
regrease
7.3.2
X
