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Operating Instructions
20
1096.0799 | VU / VH Series
10/2010
6.3.3
Closed circulation cooling
►
Switch on the aggregate.
►
Set the pressure in the operating liquid pipe to a value
which is 0.1 bar smaller than the compression pressure
(
Diagram Fig. 17)
L
RK
U
A
D
S
VK
F
PIC
01
TIC
02
Fig. 17 Closed circulation cooling
►
Observe the permissible operating liquid temperature
(
Operating liquid, page 39)
Pos.
Meaning
S
Suction connection
L
Ventilation port
D
Pressure connection
A
Overflow
U
Circulation liquid
F
Fresh liquid
VK
Feed-in cooling agent
RK
Return cooling agent
TIC
Temperature
PIC
Pressure
LIC
Filling level
Tab. 7
Legend of symbols
6.4 Decommissioning
WARNING
Risk of injuries caused by vacuum or harmful media to be
pumped and operating liquid!
►
Use protective equipment when carrying out any works on
the pump/aggregate.
►
Reliably collect escaping media to be pumped and dispose
of in an environmentally-friendly way.
Implement the following measures when taking the
pump/aggregate out of operation:
Pump/
aggregate is
Measure
shut down while
remaining ready
for operation
►
Shortly operate (approx. 5 minutes)
the aggregate at intervals of at least
one month but not exceeding three
months (
Commissioning, page 18).
shut down for a
longer period of
time
►
Implement measures in accordance
with the condition of the operating
liquid.
(
Tab.9 Measures depending on
the behaviour of the operating liquid)
drained
►
Close all fittings.
disassembled
►
Disconnect the motor from the
power supply and secure it against
unauthorized switch-on.
stored
►
Observe the measures to be imple-
mented for storage
(
Storage, page 12).
Tab. 8
Measures to be taken when putting the pump out of
operation
Operat-
ing
liquid
Duration of shut-down
(process-dependent)
Short
Long
Water
►
Drain
pump/aggregate
and separator.
►
Drain
pump/aggregate
and separator.
►
Treat
pump/
aggregate with a
preserving agent
(
Preservation,
page 12)
Other
media
-
►
Drain
pump/
aggregate and
separator.
►
Treat
pump/
aggregate with a
preserving agent
(
Preservation,
page 12).
Tab. 9
Measures depending on the behaviour of the operating
liquid
6.5 Re-commissioning
Shut-down periods > 1 year:
1.
Prepare commissioning
(
Preparations for commissioning, page 18).
2.
Perform commissioning procedures
(
Commissioning, page 18).
3.
Monitor the aggregate following commissioning
(
Monitoring, page 21).
6.6 Operating
stand-by
aggregate
Stand-by aggregate filled
Operate the stand-by aggregate at least once per week.