Publicité
4.2- Well or installation location conditions
1. The well, where you intend to install the deep well submersible pump, should:
- be vertical and straight;
- have sufficient space for the operation of the pump (refer to Fig.2 and Fig.3).
Make sure that when the pump is operating at the stipulated depth, it must not touch the walls of the
well.
2. Fit a steel pipe or a hard rubber pipe to the outlet connector (6) and fixed by a hoop tightly.
Fix the hanging rope in hanging ring (7-grommets) and prepare to hang up the pump.
NOTE: it is strictly forbidden to use power cable as hanging rope.
The submerged depth of the pump should not exceed max immersion depth (refer to Table 1) and
the distance from bottom should be more than 0,5 m.
It is recommended to install a dirt-stopping grid around the pump to prevent foreign materials, such
as water weeds, block the filter net, and influence the pump normal operation.
3. The motor should be kept sufficiently cool.
The well should contain sufficient water to ensure the maximum flow specified on the rating plate.
If the well's condition and structure cannot guarantee the required water quantity, or the water
temperature in the well exceeds 35 °C (or 95 °F), you should reduce the motor load to prevent the it
from overheating.
4. The installation of a non-return valve on the delivery pipe is not required as one is already
incorporated inside the pump.
5. Install probes which will cut off the pump power supply before the water level drops to the level
that leaves the pump exposed.
4.3- Electrical connection
4.3.1- Power supply
1. Check the voltage, frequency and intensity of power supply, whether it is according with the
requirements of motor.
2. The voltage of power supply should be (in the case of single-phase voltage) 220-240V (these are
the permitted limit values), 50-60Hz.
3. Avoid contact between the power supply and the liquid to be pumped.
4.3.2- Power cable
1. The cable should be suitable for use in water and its size can endure the current of motor.
The cable should comply with the local standards.
In order to keep the line voltage, the length of cable cannot exceed the stipulated length by motor
manufacturer (i.e. < 30m).
2. If the distance to power supply is far, it is recommended to use a cable with larger diameter.
The insulation resistance of motor stator winding should be over 5mega-Ohm.
3. It is recommended to hang the pump and fixed it firmly, then install a leakage protector at the end
of power cable and finally make earth grounding connection with the ground wire.
The wire identified by the colour combination green/yellow shall be grounded safely to prevent
electric shock (plug marked grounding).
4. Fix the power supply cable to the delivery pipe so that it cannot be twisted. Allow for expansion
of the delivery pipe by leaving a little slack between the clamps.
5. When carrying out connections, make sure that there is an efficient earth circuit.
6. The earth wire must be longer than the live wires, and must be the first wire to be connected
when the pump is being set up and the last to be disconnected during disassembly
7. Connect the pump to a socket of 2 poles + earth type of 10-16A/250V, fitted with residual current
device (RCD) or circuit breaker with a sensitivity not exceeding 30mA.
4.4- Control Box
1. Each single phase three wires of the motor should be connected to a control box
2. Check that the data on the rating plate corresponds with the stipulated values.
3. According to the standard, the control box should consist of the capacitor providing single-phase
Page 17 / 36
Publicité
