Installing The Product; Location; Horizontal Pump Foundation; Securing The Base Plate - Grundfos LFE Instrucciones De Instalación Y Funcionamiento

4. Installing the product

4.1 Location

• Locate the pump as close as possible to the liquid supply. Use
the shortest and most direct inlet pipe practical. Refer to
section
4.4.2 Inlet pipe.
• Locate the pump below system level wherever possible. This
will facilitate priming, assure a steady liquid flow, and provide
a positive inlet pressure.
• The net positive suction head (NPSH) available must always
be equal to or exceed the required NPSH specified on the
pump performance curve. Make sure the required NPSH is
provided at the inlet.
• Always allow sufficient accessibility space for maintenance
and inspection. Provide a clearance of 24 in. (610 mm) with
ample head room for use of a hoist strong enough to lift the
product.
• Electrical characteristics must match those specified on the
motor nameplate, within the limits covered in section
5. Starting up the product.
• Do not expose the product to sub-zero temperatures to
prevent the pumped liquid from freezing and to prevent
damage to the e-motor. If there is frost during shutdown
periods, see sections
5. Starting up the product
term shutdown.

4.2 Horizontal pump foundation

Install horizontal pumps permanently on a firm, raised concrete
foundation of sufficient size to dampen any vibration and prevent
any deflection or shaft misalignment. The foundation may float on
springs or be a raised part of the equipment room floor.
Proceed like this:
1. Pour the foundation without interruption to 0.75 - 1.5 in. (20-
35 mm) below the final pump level. Leave the top of the
foundation rough. Then clean and wet it down.
2. Score and groove the top surface of the foundation before the
concrete sets to provide a suitable bonding surface for the
grout.
3. Place anchor bolts in pipe sleeves for positioning allowance.
See fig. 1.
4. Allow enough bolt length for grout, lower base plate flange,
nuts, and washers.
5. Allow the foundation to cure several days before proceeding
to install the pump.
6
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4.3 Securing the base plate

When the raised concrete foundation has been poured and
allowed to set, proceed as follows:
1. Lower the pump base plate over the anchor bolts and rest it
2. Place the shims or wedges so that they raise the bottom of the
3. Level the pump shaft, flanges, and base plate using a spirit
4. Make sure that the pipes can be aligned to the pump flanges
5. For LFE, after pump alignment has been established, put nuts
6. Construct a formwork around the concrete foundation and
and
9.2 Short-
0.75 - 1.25 in.
7. Allow at least 24 hours for this grout to set before proceeding
8. After the grout has thoroughly hardened, check the foundation
LFE pumps require grouting in order to ensure a
stable pump and motor shaft alignment.
LCSE pumps do not require alignment or grouting.
on loose adjustment wedges or shims placed near each
anchor bolt and at intervals not exceeding 24 in. (610 mm)
along each side.
base 0.75 - 1.25 in. (20-32 mm) above the foundation,
allowing clearance for grout.
level, adjusting the wedges or shims, as required.
without placing any strain on either flange.
on foundation bolts and tighten them just enough to keep the
base plate from moving.
pour grout inside the base plate, as shown in fig. 1. The grout
will compensate for uneven foundation, distribute the weight
of the pump, and prevent shifting.
Base plate
Finished grouting
0.25
in.
allowance
(20-32 mm)
for grout
Formwork
Pipe sleeve
Washer
Anchor bolt installation
Fig. 1
Use an approved, non-shrinking grout.
with pipe connections.
bolts and tighten them if necessary. Recheck the pump
alignment after tightening the foundation bolts.
Grout
Wedges or shims
left in place
Top foundation
Lug