Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento página 5

3.1.2 Installation guidelines
The pump must be secured to a horizontal, plane
and solid foundation with bolts through the holes in
the base plate. When installing the pump, be aware
of the information below in order to avoid damaging
the pump.
Illustration
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2
L
B
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L
B
2
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3a
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Information
Arrows on the pump base show the direction of flow of liquid
through the pump.
This information is stated in fig.
4 x ø
• port-to-port lengths
• dimensions of the base plate
• pipe connections
1
• diameter and position of anchor bolts.
2
You can install the pump vertically or horizontally. CR, CRN 120
and 150, 75 kW, only vertically. However, the motor must neither
fall below the horizontal plane nor be installed upside down.
Make sure that an adequate supply of cool air reaches the motor
cooling fan.
Motors above 4 kW must be supported.
Additional support. As the centre of gravity of the pump is relatively
high, we recommend that pumps installed on ships, in areas with
risk of earth quake or in systems which can be moved, are
equipped with an additional support bracket. You can fit the bracket
from the motor stool to the bulkhead of the ship, a rigid wall in a
building or to a rigid part.
To minimise possible noise from the pump, we recommend that you
fit expansion joints on either side of the pump.
Build a foundation and carry out mechanical installation as
described in section
either side of the pump to avoid draining the system if the pump
needs to be removed for cleaning, repair or replacement.
Always protect the pump against backflow by means of a non-
return valve.
Install the pipes so that air pockets do not occur, especially on the
inlet side of the pump.
Fit a vacuum valve close to the pump if the installation has one of
these characteristics:
• The outlet pipe slopes downwards away from the pump.
• There is a risk of siphon effect.
• Protection against backflow of unclean liquids is needed.
3 in the appendix:
3.1.3 Foundation. Fit the isolating valves on
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