Electrical Connection - Pearl CQPL Series Installation And Operating Instructions Manual

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. Waterpump
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 too soft rubber
tube for the inlet pipeline, avoiding to be sucked flat.
2. The foot valve should be vertically placed and installed 30 cm
from water bottom to avoid sucking in sands and stones (B2);
3. Joints of the inlet pipelines should be sealed with the least
elbows, no water can be sucked.
4. Diameter of the inlet pipe should be at least in accordance
with that of the water inlet, so as to avoid too much water loss
which will influence outlet performance.
5. Pay attention to drop of water level while using, the foot valve
should not be above the water surface (B1).
6. In case the inlet pipe is longer than 10m or its lifting height
exceeds 4m, the pipe diameter should exceed diameter of water
inlet of the pump.
7. Ensure the pumped will not be affected by pipeline pressures
while installing the pipelines.
8. Filter should be installed in inlet pipelines so as to avoid solid
particles to enter into the electric pump.
INSTALLATION PRECAUTIONS OF THE OUTLET PIPELINE
1. Pipe diameter of the outlet pipeline should be at least in
accordance with that of the water outlet, so as to reduce its
voltage drop, high flow rate and noise to the minimum.
2. Verify valve check is installed in the correct way.

8. ELECTRICAL CONNECTION

Unless the power is off, do not wiring the
junction box. The electric pump should
have reliable grounding to prevent current
leakage with leakage protection switch being
equipped.
8.1 Electrical connection and protection should be conducted
according to stipulations. Specification of working voltage is
marked on the nameplate; please ensure the motor is in
accordance with power supply.
8.2 In case 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 is too dramatic.
8.3 In case the electric pump is used outdoor, extended lines
should apply rubber cables for outdoor use.
8.4 Check rotation of the motor (three-phase motor)
8.5 Check whether operation of the electric pump is normal,
rotation is correct, which could be observed from the fan blade
terminal, e.g. clockwise rotation means correct direction. In
case the rotation is incorrect, cut off power and exchange the
two power leads.