Par. 6 Electrical Connection; Par. 7 Start-Up; Abs; Afsn - ITT Lowara SVI Serie Instrucciones De Instalacion Y Modo De Empleo

5. Installation

This pump has been designed to be installed over the tank with the pump body immersed in the liquid.
The motor-pump support with delivery port includes the flange to be attached to the tank. The dimen-
sions of the hole to be drilled in the tank and the dimensions of the connection flange are shown in fig. 1
If necessary, the pump can be installed against a wall of the tank and positioned horizontally (for all
models except the SVI30 and 60 versions with more than 5 stages at 50 Hz, and with more than 4 stages
at 60 Hz). In this case make sure that the seal between the flange and the tank wall is watertight.
Immersion
To ensure proper operation and long-lasting efficiency, the immersion depth of the pump body must not
be less than the one shown in fig. 2.
6. Electrical connection
Connection of the motor to the power supply must be executed by a qualified electrician in compliance
with current electrical standards.
Install a high sensitivity differential switch (0.03A) for extra protection against electric shock in
the event of inefficient grounding.
Make sure that the rated voltage is compatible with the line voltage.
Install a master switch between the mains and the electric pump. This switch must be turned off
before conducting any maintenance operations on the pump.
For easier motor connection the terminal board can be set in one of the four 90° positions shown in fig. 3
To change the angle of the terminal board, in models with coupling (SVI....S .. and SVI....N...), remove,
whenever necessary, the coupling guard and loosen the 4 screws that fasten the motor to the spider, turn
the motor to the required position and re-tighten the 4 fastening screws
To change the angle of the terminal board (at 90 or 120° for power up to 0.45 kW) in close-coupled
models (SVI...E..) please contact our Sales and Service Department.
Then remove the junction box cover and make the connections as shown on the inside of the cover as
well as in figs. 4 and 5.
Connect the ground wire first
Overload protection
Single-phase motors have a built-in automatic reset overload protection, three-phase motors must be pro-
tected by a suitable starter set to the rated current.
7. Start-up
With the the pump body submerged start the pump, if three phase, for a few seconds. Through the cou-
pling guard or the fan cover check the direction of rotation: it must be clockwise when looking at the
pump from above, as indicated by the arrow on the flange.
If the direction of rotation is incorrect, turn off the master switch and invert the position of two supply wires.
Than start the pump with the delivery valve half opened and open it gradually,
Operation
The pump must operate smoothly and noiselessly. Do not run the pump with the delivery port closed for
more than 4-5 minutes, to avoid overheating the liquid and damages to the mechanical seal..
The outer surfaces of the motor can reach dangerous temperatures. Take adequate measures
to prevent accidental contact.
8
GB