Safety Measures; General Information - Wilo NL Serie Instrucciones De Instalación Y Funcionamiento

7.1 Safety measures

• Remove the flange-obturators of the pump right
before connecting piping.
• Connect the pipework carefully to prevent the
pumped liquid escaping during operation and
endangering operating personnel.
• Ensure that the suction or inflow line, and the
discharge line are closed by valves.
• Ensure that all electrical connections are "dead".
Otherwise, there is a risk of electric shock.
• Pay attention to relevant internal plant regula-
tions.
• Avoid accidental contacts with hot components.
CAUTION!
Remove the protective coating by following the
instructions of chapter 6.6. Otherwise there is a
danger of contamination.

7.2 General information

7.2.1 Assembly tools
Special tools are not required for assembly and
installation.
7.2.2 Permissible ambient conditions
The ambient temperature can be from -20 °C to
+40 °C. The atmospheric humidity should be as
low as possible in order to avoid corrosion.
7.2.3 Base, foundation
The pump must be installed on a flat floor or
foundation free from vibration. In case of doubt,
use vibration dampening feet.
The pump set must be correctly mounted on the
foundations. To avoid distortion of the pump set
and/or the foundation, parallel shims must be
used between the base plate and foundation.
Prior to installing, checks should be made with
regard to:
- Possible damage to the pump or the pump set
that may occur in transit.
- Ease of running (check that the shaft is free to
rotate by hand).
- The foundation dimensions.
The following preparatory work must be carried
out before to placing the pump:
- Roughen and clean foundation surface.
- Remove shuttering/cores from the anchor holes.
- Blow the anchor holes clean.
- Check the position and dimensions of the anchor
holes against the arrangement drawing.
7.2.4 Installation of the set
The complete set mounted on the base plate
must be placed on the foundation with its foun-
dation (rag) bolts hanging below the baseplate.
7.2.5 Space required
The space required for the pump set is set out in
the foundation plan or installation drawing.
Ensure easy access to the shut-off and regula-
tion valves as well as to any measuring instru-
ments.
WILO AG 09/2007
7.2.6 Position
In principle the NL pumps are installed
horizontally.
Fig. 5
7.3 Motor
Before assembly check the direction of rotation
of the motor (indicated by an arrow on the pump
casing). If this is not possible the direction of
rotation of the complete unit can only be chec-
ked only if the pump is filled.
In any event, the operating instructions of the
motor manufacturer must be followed, since the
motor is generally incorporated by Wilo into the
pump set.
7.4 Levelling the pumpset
Place shims under the base plate on both sides
of the foundation bolts, 10 mm from the base
plate edge. Use a spirit level to align the set.
If necessary, place shims between the founda-
tion bolts to prevent the base plate from sag-
ging. Care should be taken to minimize distortion
of the base plate during installation. The location
of the driver must not be higher than that of the
pump. The max. deviation from the shaft centre
line is ± 0.1 mm.
The foundation bolts should be embedded in
concrete using quick-setting grout.
7.5 Coupling
Install the coupling avoiding hard blows, if
necessary warm them for an easier fitting.
Arrange the pump and motor on a level base. The
shaft ends must be perfectly concentric. The dis-
tance between each half of the N-EUPEX B
(FLENDER) coupling must be 2 - 3 mm.
If other manufacturers' couplings are used, fol-
low the manufacturer's instructions. After instal-
lation on the foundation and connecting the
pipework, the coupling alignment must be chec-
ked and realigned, if necessary. Moreover, after
reaching the operating temperature the align-
ment of the coupling must be checked again.
The coupling requires a guard that meets DIN
31001 in order to avoid accidental contact during
operation.
In any event, the operating instructions of the
coupling manufacturer must be followed, since
the coupling is a component incorporated by
Wilo.
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