EBARA EVMSN3 Operating And Maintenance Manual page 15

8.3 FLANGE LOADING AND TIGHTENING TORQUES
Flange tightening torques
Flange
Model
DN
EVMSN (L) 3 F 25
EVMSN (L) 5 F 32
EVMSN (L) 10 F 40
Admissible strain on the flange
Flange
Model
DN
EVMSN (L) 3 F 25
EVMSN (L) 5 F 32
EVMSN (L) 10 F 40
Admissible torque on the flange
Flange
Model
DN
EVMSN (L) 3 F 25
EVMSN (L) 5 F 32
EVMSN (L) 10 F 40
9. ELECTRICAL CONNECTION
− ELECTRICAL CONNECTION MUST BE CARRIED OUT BY A QUALIFIED
ENGINEER.
− IT IS ADVISABLE TO INSTALL A HIGH INTENSITY DIFFERENTIAL
SWITCH (0.03 A) ON BOTH THE THREEPHASE AND SINGLE PHASE
VERSIONS.
WARNING!
Motor-driven pumps not equipped with a plug must be
powered by connecting them permanently to the electrical
cabinet equipped with a switch, fuses and thermal cut-out
calibrated to the pump's absorbed current.
The mains must be reliably earthed, according to the
electrical regulations in force in the user's country: this is
the installer's responsibility.
If the motor-driven pump is supplied without a power
cable, use a cable that complies with the regulations in
force and the necessary section according to length,
power and mains voltage.
If present, the plug of the single phase version must be
connected to the mains far from sprays, water jets or rain
and it must be accessible.
The pump does not have an internal motor protector, there-
fore overload protection must be provided by the user.
From 1.5 kW to 7,5 kW, the motor is equipped with a PTC. It
is recommended to connect the protection to an electronic
board.
n°
Bolt Tightening torque [Nm]
Bolt
M12 4 50
M16 4 70
M16 4 70
Strain X Strain Y Strain Z
[N] [N] [N]
230 200 180
270 230 210
370 330 300
Torque X Torque Y Torque Z
[Nm] [Nm] [Nm]
190 240 160
230 280 190
310 390 270
[-B-]
WHILE CONNECTING, MAKE SURE THAT BOTH THE TERMINAL BOARD AND
THE MOTOR DO NOT GET WET.
– For threephase versions, after connecting the star or triangle cable to the
terminal board, looking at the pump from the motor side, check that the cooling
fan turns in the same way as the arrow on the label applied on the fan cover.
If it is incorrect, swap two of the three wires over on the motor's terminal strip.
MOTOR-DRIVEN EVMSN
Before starting to make electrical connections, make sure that line voltage and
frequency match the motor's values given on the rating plate.
You must insert a control panel between the line and the motor-driven pump
featuring the following devices (unless otherwise specified by local standards);
- Switch with at least a 3mm gap between contacts;
- Short-circuit protection device (fuse or thermomagnetic circuit breaker);
- High-sensitivity (0.03 A) residual current circuit breaker;
- We recommend installing a device to protect against dry running, which must
be connected to a float, sensors or other such equipment;
Connect the protective conductor to the PE terminal first, leaving it longer than the
others so that it will be the last wire to be pulled out if accidentally tugged.
If the terminal box is in an awkward position for connecting the cable, you can
change its position by turning the motor 90° or 180° or 270°. To do this, it is
necessary to remove the 4 screws holding the motor to the motor mount, lift the
engine just enough to allow rotation, without removing the coupling between the
motor shaft and the pump shaft. Then screw the 4 screws back in.
10. FILLING THE PUMP
WARNING!
Do not start the pump until it has been positioned and
installed in its final place of operation to be performed with
the motor's terminal strip fully closed.
The pump and suction line must be filled with water. As specified earlier, running
the pump without water inevitably causes serious damage to a number of the
pump's internal parts.
Fill the pump with the terminal box closed and the power supply disconnected.
10.1 FILLING PUMP IN SUCTION LIFT ARRANGEMENT
a) Unscrew the hexagonal cap located above the outer jacket on a level with the
upper mount (remove coupling covers if necessary);
b) With the aid of a funnel, fill the suction line and pump casing with water to
overflowing;
c) Screw the hexagonal cap back on until it is locked tight;
d) Areas that have become wet as a result of water leaks must be dried
thoroughly;
e) Refit the coupling covers if they have been removed;
10.2 FILLING PUMP IN A FLOODED INSTALLATION
a) Unscrew the hexagonal cap;
b) Open the suction gate valve until the water comes out;
c) Screw the cap back on until it is locked tight. Starting and operation;
11. USE, STARTING AND RUNNING
NEVER ALLOW THE MOTOR-DRIVEN PUMP TO OPERATE WITHOUT
WATER. DOING SO CAN SERIOUSLY DAMAGE THE INTERNAL
COMPONENTS.
11.1 GENERAL WARNINGS
a) Our surface pumps are designed to operate at a temperature no higher than
40°C and a level no higher than 1000 metres;
b) our motor-driven pumps cannot be used in swimming pools or similar plants;
c) prolonged motor pump operation with the delivery pipe closed can cause
damage;
d) If operate the pump on and off more than 50,000 times per year, the pump life
may be shortened and there is a risk of premature failure. Regarding the
maximum number per hour, please refer also Chapter 7.2.;
e) during power cuts, it is advisable to disconnect the power to the pump.
f) select the pump so that it will operate close to the best efficiency point, at
least between minimum and maximum rated flow rate.
EN
[-C-]
[-D-]
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