Wilo NL-HE Series, Инструкция по установке и эксплуатации

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en Installation and electrical connection
20 WILO USA 2021-01
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Remove the covers from the suction and discharge ports.
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If required, install a dirt filter upstream of the pump in the pipe on the suction side.
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Then connect the pipes to the pump connecting pieces.
6.7 Aligning the unit
CAUTION
Incorrect alignment can result in property damage!
The transport and installation of the pump can affect the alignment. The motor must be
aligned to the pump (not vice versa).
• Check the alignment before the first start.
CAUTION
Changes to the alignment during operation can result in property damage.
The pump and motor are usually aligned at ambient temperature. Thermal expansion at
operating temperature can change the alignment, particularly in the case of very hot flu-
ids.
Adjustment may be required if the pump is required to pump very hot fluids:
• Allow the pump to run at the actual operating temperature.
• Switch off the pump then immediately check the alignment.
Precondition for reliable, smooth and efficient operation of a pump unit is proper alignment
of the pump and the drive shaft.
Misalignments can be the cause of:
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excessive noise development during pump operation
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vibrations
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premature wear
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excessive coupling wear
6.7.1 Coupling alignment
EPDM Coupling Alignment
G
1
(ref)
P A
Fig. 11: EPDM Coupling Alignment
P Parallel Alignment A Angular alignment
Sleeve size Max.
RPM G
1
(ref) EPDM Allowable Misalignment
Parallel Angular
in mm in mm in mm
4
7600 1.5 38 0.01 0.25 0.043 1.09
5
7600 1.9 49 0.015 0.38 0.056 1.42
6
6000 2.4 60 0.015 0.38 0.07 1.78
7
5250 2.6 65 0.02 0.51 0.081 2.06
8
4500 2.9 75 0.02 0.51 0.094 2.39
9
3750 3.5 89 0.025 0.64 0.109 2.8