TapFlo CTV Series, Руководство Iom

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1. INSTALLATION
IOM manual CTV vertical centrifugal pumps
10
1.10. Instruments
In order to ensure a proper control of the performance and the conditions of the installed
pump, we recommend using the following instruments:
➢
a pressure gauge on the discharge piping.
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.
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 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.