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7.2.2 Motor selection
Shaft power
Limit value for
the P
motor
2
7.2.3 Coupling selection
7.3
Installation on a base of the pump
unit
7.3.1 Base
Fig. 5: Installing the pump on a base
Installation and operating instructions Wilo-CronoNorm-NL, NLG
In any case, all components must meet the CE regulations. The cou-
pling protection must be compatible with EN 953.
• Motor and coupling must be CE compliant.
• Select a motor with sufficient power (see Tab. 5).
< 4 kW
4 kW < P
2
25 %
20 %
Tab. 5: Motor/shaft power
Example:
• Water duty point:
Q = 100 m
H = 35 m
Efficiency = 78 %
• Hydraulic power:
12.5 kW
The required limit value for this duty point lies at 12.5 kW x 1.15 =
14.3 kW
A motor with a power of 15 kW would be the correct choice.
Wilo recommends using a B3 motor (IM1001) with base installation,
which is compatible with IEC34-1.
• To establish the connection between the pump with bearing bracket
and motor, use a flexible coupling.
• Select the coupling size according to the recommendations of the
coupling manufacturer.
• Follow the instructions of the coupling manufacturer.
• After installation on the base and connecting the lines, the coupling
alignment must be checked and corrected, if necessary. See also sec-
tion 7.5.2 "Check the coupling alignment" on page 71.
• After reaching the operating temperature, the coupling alignment
must be checked again. The coupling must be protected in acc. with
EN 953 to prevent accidental contact during operation.
CAUTION! Danger of property and material damage!
A flawed base or an incorrect installation of the unit on the base
can lead to a malfunction of the pump; this is not covered by the
warranty.
• Only have the pump unit installed by skilled personnel.
• A professional from the concrete area must be hired for all base
work.
Wilo recommends installing the pump unit on a stable, flat concrete
base, which can support the unit long-term (see Fig. 5). This would
prevent vibrations from being transmitted.
The base, made of non-shrinking mortar, must be able to accommo-
date the forces, vibrations and impacts which occur during operation
of the pump unit. The base should be approx. 1.5 to 2x heavier than
the unit (guide value). The width and length of the base should each
be about 200 mm greater than the baseplate.
< 10 kW
10 kW < P
< 40 kW
2
15 %
3
/h
English
40 kW < P
2
10 %
68
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