Installation; Preparations Before Installation; Pump Location; Foundation - Grundfos Fire NKF series Montage- Und Betriebsanleitung

7. Installation

7.1 Preparations before installation

Handle the equipment correctly before
installation. Much equipment has been damaged
Caution
because of mishandling before being put into
operation.
Inspect the equipment on delivery and make sure that it is stored
in such a way that corrosion and damage are avoided.
All unpainted, machined surfaces must be coated with a suitable
anti-corrosive agent. If more than 6 months will pass before the
equipment is to be put into operation, consider applying a suitable
anti-corrosive agent to the internal pump parts.
The anti-corrosive agent must comply with these requirements:
• must not affect the rubber parts
• must be easy to remove
• must be applied in accordance with the manufacturer's
instructions.
To prevent water, dust, etc. from entering the pump, keep all ports
and openings covered until the pipes are fitted. The cost of
dismantling the pump after start-up to remove a foreign object
can be very high.
Shaft seals are precision components. If the shaft seal fails, it will
normally happen within the first few hours of operation. The main
cause of such failures is often improper installation of the shaft
seals or the barrier fluid pipe and/or mishandling of the pump
during installation. Therefore, pumps with shaft seals require
special handling during transport and installation.
During transport, the pump must be fastened securely to prevent
excessive vibrations and/or damage to the shaft and seal caused
by dropping. Do not lift the pump by the shaft.

7.2 Pump location

Place the pump in a dry, well-ventilated and frost-free location.
Allow suitable clearance around pump and motor to enable
inspection, repair and removal.

7.3 Foundation

The foundation/installation must be carried out in
accordance with the following instructions. Non-
Caution
compliance may result in functional faults which
will damage the pump components.
Grundfos recommends to install the pump unit on a concrete
foundation which is heavy enough to provide permanent and rigid
support to the entire pump unit. The foundation must be capable
of absorbing any vibration, normal strain or shock. As a rule of
thumb, the weight of the concrete foundation should be 1.5 times
the weight of the pump unit. The concrete foundation must have
an absolutely level and even surface.
Place the pump unit on the foundation and fasten it. The base
frame must be supported on the whole area. See figures and 5
and 6.
Fig. 5 Correct installation
Fig. 6 Incorrect installation
Fig. 7 Foundation
The recommended length and width are shown in fig. 7. Note that
the foundation length and width must be 200 mm larger than the
base frame.
The mass of the foundation must be at least 1.5 times the total
mass of the pump. The minimum height of the foundation (h
then be calculated:
×
m 1.5
pump
h ------------------------------------------- -
=
× × δ
f
L B
f f concrete
The density (δ) of concrete is usually taken as 2,200 kg/m
In installations where noiseless operation is particularly
important, we recommend that you use a foundation with a mass
of up to five times that of the pump. See also section 7.4 Vibration
dampening.
) can
f
3
.
9