Pearl CQPL Serie Manual página 3

NEGATIVE SUCTION
CORRECT INSTALLATION
4
7
3
3
2
5
1
INCORRECT INSTALATION
POSITIVE SUCTION
CORRECT INSTALLATION
INCORRECT INSTALLATION
1. Foot valve
2. Inlet pipe
3. Tie-in
4. Filling plug
5. Drain plug
6. Electric pump
6
7. Valve
B1 B2
1. Water pump
2. Drain plug
3. Tie-in
4. Check valve
5. Valve
6. Inlet pipe
7. Basket
8. Filling plug
INSTALLATION PRECAUTIONS FOR INLET PIPELINES
1. While installing the electric pump, do not use a rubber tube
that is too soft for the inlet pipeline because it may collapse.
2. The foot valve should be vertically placed and installed
30cm from the water bottom to avoid absorbing sand and
stones (82).
3. Joints of the inlet pipelines should be sealed with the least
elbows, otherwise, this could hinder water suction.
4. The diameter of the inlet pipe should be, at least, in
accordance with that of the water inlet, to avoid too much
water loss, which will influence outlet performance.
5. Pay attention to drops in water level while operating. The
foot valve should not be above the water surface (81).
6. If the inlet pipe is longer than 10m or its lifting height
junction box exceeds 4m, the pipe diameter should exceed
the diameter of the water inlet of the pump.
7. Make sure that the pump will not be affected by pipeline
pressures while installing the pipelines.
8. The filter should be installed in inlet pipelines to prevent
solid particles from entering the electric pump.
INSTALLATION PRECAUTIONS OF THE OUTLET PIPELINE
1. The pipe diameter of the outlet pipeline should be at least
the same as that of the water outlet in order to reduce its
voltage drop, ensure a high flow rate, and bring noise to the
minimum.
2. Make sure that the check valve is installed correctly.
8. ELECTRICAL CONNECTION
Do not perform any wiring while the pump is
connected to the power supply. The electric
pump should have reliable grounding along
with a leakage protection switch to prevent
current leakage.
Every pump should be provided with an
electrical device, such as a magnetic
starter or similar, to protect it from current
variations, phase variations, and short
circuits.
8.1 Electrical connection and protection should be conducted
according to stipulations. Specification of working voltage is
marked on the nameplate; please make sure the motor is in
accordance with the power supply.
8.2 If the working area of the electric pump is too far from the
power supply, power transmission lines should be of a heavier
gauge, otherwise the electric pump cannot work normally
because the voltage drop will be too drastic.
8.3 If the electric pump is used outdoors, the cables should
have a proper rubber coating.
8.4 Check the rotation of the motor (three-phase motor).
8.5 Make sure that the operation of the electric pump is normal,
and that rotation is correct, which could be observed from
the fan blade terminal, e.g., clockwise rotation means correct
direction. If the rotation is incorrect, cut off power and exchange
the two power leads.the two power leads.