Grundfos Peerless Pump 8196 Series, Installation, Operation And Maintenance Manual

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When the alignment is correct, the foundation bolts should be tightened evenly, but not too firmly. The unit can then
be grouted to the foundation. Foundation bolts should not be fully tightened until the grout is hardened, usually about
48 hours after pouring. Installation without grout completely filling the base plate is acceptable only when
recommended by specific notation on the unit outline drawing.
Grouting that completely fills a base plate is also necessary for minimum vibration levels, since a very stiff base is
uneconomical and unnecessary except for portable units. Grout compensates for unevenness in the foundation and base
plate and distributes the weight of the unit uniformly over the foundation. It also prevents the unit from shifting after
mounting and alignment. It is essential that the pumping unit be expertly grouted by use of non-shrinking grout. The
mix required varies with the type of unit to be grouted, location and amount of grout. The instructions included with
the non-shrinking grout package will provide the required information for the proper mix for individual applications.
Grout the unit as follows:
(a) Build a form of plywood or thick planking around the foundation to contain the grout. Support adequately to
prevent deformation.
(b) Soak the top of the concrete pad thoroughly with water before grouting. Remove all surface water before
pouring.
(c) Pour the grout through the holes provided in the base plate or through open ends of steel channel base plates.
While pouring, tamp liberally to fill all cavities and prevent air pockets.
In pouring and tamping, the grout may trap air in some places. Drill small vent holes through the base surface.
(d) After the grout has thoroughly hardened, tighten the foundation bolts and connect the piping.
Be certain piping does not strain pump flanges.
(e) Check the alignment after the piping is connected and the foundation bolts are tightened. (f)
Connect the coupling halves.
(g) After the grout has. thoroughly dried, apply an oil base paint to the exposed edges of the grout to prevent air and
moisture from encountering the grout
It is very important to support and restrain both the suction and discharge pipes near the pump to avoid
application of the forces and moments to the pump casing. Failure to support the piping properly can cause
excessive pipe strain on the casing which can affect alignment, cause vibration, and promote rapid wear of seals
and bearings. Damage caused by pipe strain will void the warranty.
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NOTE