Grundfos DP 10 Series, Инструкция по установке и эксплуатации

Страница: 15 / 40

English (GB)
15
9. Starting up the product
9.1 General startup procedure
Proceed as follows:
1. Remove the fuses and check that the impeller
can rotate freely. Turn the impeller by hand.
2. Check the condition of the oil in the oil chamber.
See also section 10.5 Oil change .
3. Check whether the monitoring units, if used, are
operating satisfactorily.
4. Check the setting of the air bells, float switches
or electrodes.
5. Open the isolating valves, if fitted.
6. Lower the pump into the liquid and insert the
fuses.
7. Check that the system has been filled with liquid
and vented. The pump is self-venting.
8. Start the pump.
After one week of operation or after replacement of
the shaft seal, check the condition of the oil in the oil
chamber. See section
10. Maintenance and service
for procedure.
9.2 Operating modes
The pumps are designed for intermittent operation
(S3). When completely submerged, the pumps can
also operate continuously (S1).
Fig. 9 Operating levels
• S3, intermittent operation
S3 operation is a series of identical duty cycles
(TC) each with a constant load for a period,
followed by a rest period. Thermal equilibrium is
not reached during the cycle. See fig.
10 .
Fig. 10 S3 operation
• S1, continuous operation
The pump can operate continuously without
being stopped for cooling. See fig.
11 . Being
completely submerged, the pump is sufficiently
cooled by the surrounding liquid. See fig.
9 .
Fig. 11 S1 operation
The pump must not run dry.
If the atmosphere in the pit is potentially
explosive, use only pumps with Ex
approval.
Do not open the clamp while the pump is
running.
In case of abnormal noise or vibrations
from the pump, other pump failure or
power supply failure, stop the pump
immediately.
Do not attempt to restart the pump until the
cause of the fault has been found and the
fault corrected.
TM
06
58
77
03
16
TM
04
45
27
15
09
T
M
04
45
28
15
09
S1
S3
Operation
Stop
TC
P
t
P
t
Operation
Stop