DAR0591, DAR0593
17
4.
ELECTRICAL CONNECTION
Before operation, the pump shall be subjected to safety inspection to ascertain whether the pump, especially
the power cable and plugs are damaged or not. Running of defective pump shall not be allowed. The
defective pump shall be repaired in our after-sales service center or out authorized maintenance center.
EARTH:
The connection cable of our pump is provided with two earth contacts. If the earth of the plug-lead is
selected, the socket is correspondingly earthed.
NOTE:
Please check whether the voltage and frequency indicated in pump nameplate are
consistent with that of the net.
NOTE:
In case of broken power plug, the following guarantee will be invalid. It shall replaced
with genuine connection cable to the maintenance (guarantee) unit in a charging mode. For
extension of connection cable, merely the extended connection cable may be replaced, which
shall have outside diameter at least equal to that of the original cable.
5.
INSTALLATION
Before starting, suction pipeline and the pressure pipeline shall be fixed onto the pump. The suction pipeline
sucks the water from pond to the pump and the suction connection is at side of the pump. The suction
pipeline shall kept absolutely tight, or the suction would be impaired or even impossible.
For ensuring tightness of the suction pipeline, the plastic threads shall be wrapped PTFE tape and steel or
copper threads with hemp fiber or PTFE tape.
The suction pipeline shall be fixed with a non-return valve, or after stop of pump the system pressure would
reduce through the suction pipeline, which, if household water supply unit or automatic sprinkler is used,
which would result in frequent out-controlled on/off of pump. In principle, it is suggested to directly install a
non-return valve between the pump inlet side and the suction pipeline, because by this way after shutdown
of equipment, the suction pipeline will not be idle and always under pressure, or the suction hose would be
broken. In addition, a suction valve may be fixed in from of the suction pipeline, which certainly is not
absolutely necessary to fix.
Pumps have self-suction function, i.e. they are merely required to prime before they are firstly used. The case
of pumps of all types is filled with water from the filling port on the case. Before filling, the screwed cap is
opened and water is filled to the pump till air is invisible form the case. It should be noted that during the
filling process, air bubble would occur inside the pump. In this case, please slightly shake the pump in
different directions to eliminate the bubble and then resume filling. Repeat the above process for several runs
till water just reaches under the filling port. Then, screw the cap on the filling port again. The cap shall not be
excessively tightened, or the pump case or pipe thread would be damaged.
The idle running time of the suction pipeline shall not exceed 7 minutes. In order to shorten idle time, it is
suggested to fully fill water into suction pipeline (including the fore-filter) before starting. The maximum