1.
INSTALLATION
IOM manual CTX centrifugal pumps
11
The pressure intakes must be made of straight pieces of piping at a distance of minimum
five diameters from the pump inlets. The pressure gauge on discharge must always be fitted
between the pump and the shut-off / regulation valve. The output can be read on the
pressure gauge, transformed into meters and then compared with the typical curves.
1.10.1.
Electric power
The electric power absorbed by the motor can be measured by means of a wattmeter or an
amp gauge.
1.10.2.
Optional instruments
The optional instruments can indicate if pump is working in an abnormal way. The abnormal
conditions can be caused by: accidentally closed valves, lack of pumped liquid, overloads,
etc.
1.10.3.
Thermometer
If the temperature of the pumped liquid is a critical parameter, provide the installation with
a thermometer (preferably on the suction side).
1.11.
Motor connection
An expert electrician must always carry out the electrical connection. Compare the power
supply with the data plate specifications and then choose a suitable connection. The type of
connection is stated on the motor data plate and can be Y (star) or D (Delta), according to
the power supply of the motor (see figure below).
STAR
DELTA
Follow the connection standard used in the plant. In no case connect the electrical motor
directly to supply network but use a suitable electric switchboard equipped with a knife
switch and suitable safety devices (e.g. motor breaker switches) in the power circuit. Safety
devices against overloads must also protect the motors. Make sure that the motor has
suitable grounding and that it has been connected properly.
