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9 - Lantern
10 - Tube liner
11- Flange
12 - Pump housing
13 - Base plate
FIG. 2 and 3
1 - Strainer
2 - Pump suction valve
3 - Pump discharge valve
4 - Check valve
5 - Drain + priming plug
6 - Air bleed screw + Filling plug
7 - Tank
8 - Foundation block
9 - In option: pressure plugs (a-suction, b-discharge).
10 - Lifting hook
6.2 Design of product
- Nexis pumps are vertical high pressure non-self priming pumps
with inline connection based on multistage design.
- Nexis pumps combine use of both high efficiency hydraulics and
motors (if any).
- All metallic parts in contact with water are made of stainless steel
or grey cast iron.
- For aggressive fluid, special versions exist with stainless steel only for
all wetted components.
- Nexis pumps are equipped with a simple mechanical seal or with
a cartridge seal to facilitate maintenance.
- In addition, for heaviest motor, a specific coupling allows to
change this seal without removing the motor.
- Nexis lantern design integrates an additional ball bearing that
withstand hydraulic axial forces : this allows the pump to use a fully
standard motor.
- Special handling devices are integrated in order to facilitate
pump installation.
7. INSTALLATION AND ELECTRICAL CONNECTION
Installation and electrical work in compliance with any local codes
and by qualified personnel only.
WARNING! Bodily injury !
Existing regulations for the prevention of accidents must be
observed.
WARNING! Electrical shock hazard !
Dangers caused by electrical energy must be excluded.
7.1 Commissioning
Unpack the pump and dispose of the packaging in an environmen-
tally-responsible manner.
7.2 Installation
The pump must be installed in a dry, well-ventilated and frost-free
place.
CAUTION! Possible damage of the pump ! Dirt and solder
drops in to the pump body can effect the pump operation.
- It is recommended that any welding and soldering work be done
before installing the pump.
- Thoroughly flush the system out before installing the pump.
- The pump must be installed in an easily accessible position to
facilitate inspection or replacement.
- For heavy pumps, install a lifting hook (FIG. 2 - pos. 10) above the
pump in order to ease its disassembly.
WARNING! Risk of accident by hot surfaces!
The pump must be positioned so that someone cannot
come into contact with the hot pump surfaces while operation.
- Install the pump in a dry place protected from frost, on a flat con-
crete block using appropriate screws. If possible, use an insulating
material under the concrete block (cork or reinforced rubber) to
avoid any noise and vibration transmission into the installation.
WARNING! Risk of fall!
The pump must be screwed to the ground.
- Place the pump where it will be easy to reach, to facilitate inspec-
tion and removal work. The pump must always be installed per-
fectly upright on a sufficiently heavy concrete base.
CAUTION! Risk of parts inside the pump!
Take care to remove closure members of the pump housing
before installation.
NOTE: Each pumps could be tested regarding hydraulic fea-
tures in factory, some water may remain in them. It is recom-
mended for hygienic purposes, to carry out a rinsing of the pump
before any using with potable water supply.
- The installation and connection dimensions are given § 5.2.
- Lift the pump carefully by using the integrated rings, if necessary
with a hoist and suitable slings according to the current hoist
guidelines.
WARNING! Risk of fall! Take care to pump fixations especially
for the highest pumps whose centre of gravity may lead to
risk during pump handling.
WARNING! Risk of fall! Use integrated rings only if they are
not damaged (no corrosion ...). Replace them if needed.
WARNING! Risk of fall! The pump must be never carried by
using motor hooks : these are only designed to lift the motor
alone.
7.3 Pipe connection
- Connect the pump to the pipes by using only counterflange bolts,
nuts and gaskets supplied with the product.
CAUTION! Tightening of bolts must not exceed 10 daN.m.Use
of impact wrench is prohibited.
- The circulation sense of the fluid is indicated on the identification
label of the pump.
- Pump must be installed in such a way that it is not stressed by the
pipework. The pipes must be attached so that the pump does not
bear their weight.
- It is recommended that isolation valves be installed on the suction
and discharge side of the pump.
- Use of expansion joints may mitigate noise and vibration of the
pump.
- As regards the nominal cross-section of the suction pipe, we rec-
ommend a cross-section at least as large as that of the pump
connection.
- A check valve could be placed on the discharge pipe in order to
protect the pump against hammer shock.
- For direct connection to a public drinking water system, the suc-
tion pipe must also have a check valve and a guard valve.
- For indirect connection via a tank, the suction pipe must have a
strainer to keep any impurities out of the pump and a check
valve.
7.4 Motor connection for bare-shaft pump (without motor)
- Remove coupling guards.
NOTE: Nexis pumps are equipped with captive screws as
required in the Machinery Directive.
- Install the motor on the pump by using screws (FT lantern size – see
product designation) or bolts, nuts and handling devices (FF
lantern size – see product designation) provided with the pump:
check motor power and dimension in SALMSON catalogue.
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