Wilo Norma V Series, Инструкция по установке и эксплуатации

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ENGLISH
11
Pump can occasionally handle solids in the liquid but it will drive to
a reduction of pump lifetime, increasing of equipment noise and
absorbed power.
HYDRAULICS WITH CLOSED IMPELLERS :
Maximum fluid viscosity is 300 cSt (mm²/s), or 40°E.
Free passage depends on pump size :
PUMP SIZE
Max size
(mm)
40-315 Ø2
32-125 32-160B 40-160 32-200A/B 40-200 32-250 40-
250
50-250 50-315
Ø3
125-315 Ø5
40-125 50-125 65-125 32-160A 50-160 65-160 100-
160 50-200
65-200 80-200 100-200 65-250 80-250 100-250 125-
250 65-315
80-315 100-315 150-315 100-400 125-400 150-400
Ø6
80-400 Ø7
150-500 300-500 Ø10
80-160 125-200 150-200 150-250 200-400 200-500 Ø12
200-250 250-300 200-315 250-315 250-400 250-500 Ø14
300-400 Ø16
HYDRAULICS WITH SEMI-OPEN IMPELLERS :
Maximum fluid viscosity is 500 cSt (mm² ).
It is possible to pump fluids containing particles when pump is run at
1450 RPM with the following restrictions :
- Solid size smaller than 1 mm : 10% maxi in volume
- Light particles with smaller size than 1 mm : 35% maxi of the
volume without any change in fluid specific gravity.
Free passage depends on the pump size :
PUMP SIZE
Max
size
(mm)
32-20-200 Ø5
32-20-160 40-25-250 Ø6
40-25-125 100-80-125 40-25-160 Ø7
50-32-125 50-32-160 40-25-200 Ø8
65-40-125 50-32-200 50-32-250 Ø9
80-50-125 65-40-250 50-32-315 Ø10
65-40-200 Ø10.5
65-40-160 80-50-160 125-100-160 Ø11
100-65-200 65-40-315 Ø12
125-100-200 80-50-250 80-50-315 Ø13
100-65-160 80-50-200 100-65-250 Ø14
100-65-315 100-65-400 Ø16
125-80-315 Ø18
125-100-250 150-125-250 150-125-315 Ø19
200-150-315 Ø20
125-80-400 Ø21
200-150-400 Ø24
150-125-400 200-150-250 Ø25
5.2.3 DIRECTION OF ROTATIO N
Serious damage can result if the pump is started or run in the
wrong direction of rotation.
Ensure that the direction of rotation is correct before first start-up or if
maintenance work has been carried out on the electric power supply.
Direction of rotation must correspond to the arrow attached or
engraved in the pump.
Check direction of rotation when motor is apart (coupling spacer
dismantled or motor not coupled to pump). If not feasible due to pump
design (pump fitted with rigid coupling) it is necessary to check that
pump shaft turns freely after the test and before final pump start.
To check direction of rotation start motor briefly and check direction of
rotation just before rotation stops. If direction of rotation must be
modified then reverse two phases in motor junction box.
It is possible to change two phases in the control cabinet on motor
starter connections. If this solution is preferred then it will be necessary
to modify the identification of the cables in the electrical drawings too.
5.2.4 NOISE LEVEL
Noise level of a complete pump set depends on motor type and speed,
on quality and wear of flexible coupling (if concerned), on fluid velocity,
piping design, … Values given hereafter are only indicative and based on
fan cooled electric motors average noise levels.
The test must be perfomed on the supplied pump if the noise level
must be certified.
If noise level is higher than 85dBA, personel working in pump area
should wear hearing protections.
Motor speed

2900 RPM 1450 RPM
Elec motor
power
[KW]

Pump
set Bare
shaft Pump
set Bare
shaft
< 0,55 65 60 65 60
0,75 65 60 65 60
1,1 65 60 65 60
1,5 70 65 70 65
2,2 75 70 70 65
3 75 70 70 65
4 85 80 70 65
5,5 85 80 70 65
7,5 85 80 70 65
11 85 80 75 70
15 85 80 75 70
18,5 85 80 75 70
22 85 80 75 70
30 85 80 80 75
37 90 80 80 75
45 90 80 80 75
55 95 85 80 75
75 95 85 85 80
90 95 85 85 80
110 95 85 85 80
150 95 85 85 80
Indicative noise level given in dBA (LpA at 1 m)