DAB KLP 50-1200 M [26/108] Scrupulously follow the wiring diagrams inside the terminal board box and those on page 5 of this manual

DAB KLP 50-1200 M [26/108] Scrupulously follow the wiring diagrams inside the terminal board box and those on page 5 of this manual
ENGLISH
24
7.
INSTALLATION
7.1
To protect the pump against deposits, it is advisable to install it in the lowest point of the system.
Fit the pump in the plant only after having completed the welding works and checked that the
plant is quite clean.
7.2
The electropump must be fitted in a well ventilated place, protected from unfavourable weather
conditions and with an environment temperature not exceeding 40°C. Fig. B
Electropumps with degree of protection IP55 may be installed in dusty and damp environments. If
installed in the open, generally it is not necessary to take any particular steps to protect them
against unfavourable weather conditions.
7.3
The pump may be fitted either on the delivery or on the return pipe, with the motor axis in
horizontal or vertical position, as long as the terminal board box is never facing downwards
(FIG.C) so as to avoid dangerous water infiltrations in the case of leaks For ALM – ALP pumps
the motor axis must only be horizontal.
7.4
To facilitate checking and replacement operations, install the pump in a position with easy access.
7.5
The arrows on the pump body indicate the direction of flow. It is recommended to use
interception gate valves on the intake and delivery pipes, to prevent drainage of the system when it
is to be repaired. Fit also a by-pass circuit between delivery and intake to guarantee minimum
recycling if electrovalves are used in the pipes, so as to avoid the creation of dangerous
temperature rises.
7.6
Ensure that the plant is provided with an air bleeding system and that the expansion chamber (if
provided) is installed before the intake aperture. If the pump is installed on the delivery of an
open vessel circuit, ensure that the safety pipe is connected before the pump.
7.7
When fitting the pump on the system, ensure that the metal pipes do not weigh down on the pump
body, transmitting excess forces or stress that could cause cracks or breakages
7.8
To avoid transmitting noise and vibrations, fit vibration-damping couplings on the intake and
delivery apertures.
8.
ELECTRICAL CONNECTION
Caution! Always follow the safety regulations.
Scrupulously follow the wiring diagrams inside the terminal
board box and those on page 5 of this manual.
8.1
The electrical connections must be made exclusively by skilled personnel (see point 6.1) as
required by the safety regulations in force.
The requirements of the electric energy supply company must be scrupulously complied
with.
In the case of three-phase motors with star-delta start, ensure that the switch-over time from star to
delta is as short as possible and that it falls within table 8.1 on page 99.
8.2
Before opening the terminal board and working on the pump, ensure that the power has been
switched off
8.3
Check the mains voltage before making any connection. If it is the same as the voltage on the data
plate, proceed to connect the wires to the terminal board, giving priority to the earth lead. (Fig.
D).
8.4
ENSURE THAT THE EARTH SYSTEM IS EFFICIENT AND THAT THERE IS THE
POSSIBILITY OF MAKING A GOOD CONNECTION.
8.5
The pumps must always be connected to an external switch.
8.6
Single-phase motors are provided with thermal overload protection and may be connected directly
to the mains.
8.7
Three-phase motors must be protected with special remote-control motor-protectors calibrated for
the current shown on the plate.
8.8
In systems where twin pumps are fitted, provide separate wiring and switches for each pump so as
to ensure continuous service.
9.
STARTING UP
9.1
As well as being at high temperature and high pressure, the fluid in the
system may also be in the form of steam.
DANGER OF BURNING.
It may be dangerous even to touch the pump or parts of the system.

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