Grundfos MS 4000, Руководство по эксплуатации продукта

Страница: 40 / 48

40
Accessories
MS Motors
Features and benefits
Selecting the right pump
The Grundfos CU 3 control unit and a flowmeter provide
for a constant monitoring of energy consumption and
performance of the pump thus making it possible to
ensure that the right pump is selected for the applica-
tion in question.
The CU 3 control unit makes it possible to choose the
borehole(s) to be in operation which offer(s) the lowest
operating costs.
Choosing the right time for service
The constant monitoring by the CU 3 control unit makes
it possible to service the pump, i.e. clean it and replace
wear parts, at the best possible time.
Today service and maintenance work is often carried
out at regular intervals or when actual downtime
occurs. Both are unlikely to result in an optimum
energy-efficient operation.
Avoiding overpumping
Using the Grundfos CU 3 control unit and a water level
sensor it is possible to carry out test pumping of each
borehole. This is done by measuring the water table
level and the volume of water which is pumped. The
purpose is to ensure that only the water naturally
running to the borehole is pumped. As a result opera-
tions will provide for optimum efficiency. Consequently,
the lives of both borehole and pump will increase, since
both water aeration and the risk of ingress of aggres-
sive water are reduced.
Reducing costs of water treatment
By minimizing the risk of overpumping and thus the
pumping of impure ground water the costs of water
treatment can be reduced to a minimum.
Using the Grundfos CU 3 control unit and a sensor it is
possible to measure water conductivity in each bore-
hole. This provides for the possibility of selecting the
borehole (or boreholes) to be in operation which
supplies the best water quality at any time.
Fig. 14
Fig. 15
Fig. 16
Fig. 17
TM
00 729
6 109
6
T
M
00
72
97
10
96
T
M
00
72
98
10
96
T
M
00
7
2
99
10
96
kWh
Time
kWh
Time
p g
Ti
Time for service
Operating costs
Time
Time
Conductivity
MS.book Page 40 Wednesday, January 26, 2005 3:25 PM