4
Ÿ
If there is flow inside the tank, support the piping appropriately. The pipes must
be installed such as to prevent air lock, if unavoidable, an air release valve must
be installed wherever such air pockets are likely to develop.
Ÿ
The end of discharge pipe should not be submerged as back flow will result
For automatic pumps, install a oat switch as shown in Fig-
1. The pump may not start if the oat switch touches the
wall of the water tank or the piping.
WARNING
Ÿ
The Pump should be connected to either a rigid pipe or hose. The diameter
should be no less than the pump outlet.
Ÿ
To avoid dry running, on manual pumps an external float switch can be installed
as shown in Fig-2. Always ensure to maintain a safe operating water level.
Ÿ
Ensure to never lift the pump by the main supply cable or permanent damage
will occur.
Ÿ
All installations must be provided with an isolator to cut off mains power supply
and coarse current protection in the form of a fuse or MCB rated at 2-3 times
the full load current as given on the pump plate.
Ÿ
Ensure that the power supply rating complies with the specification on the pump
rating plate.
Ÿ
Electrical connections must be made according to details in the pump junction
box cover and effective earthing must be provided according to local
regulations.
Ÿ
Single-phase motors are protected against overloads by a thermal overload
fitted in the motor windings. Three phase motors should be installed with
remote starter.
Ÿ
Regularly check the current readings. If fluctuating, foreign matter may be
clogging the pump. Also if pump output reduces, foreign matter may be present
and the pumps hydraulic end should be checked and cleaned.
Ÿ
Measure the insulation resistance monthly. The value should be more than 1M
ohm.
3. ELECTRICAL CONNECTIONS
The installer is responsible for making electrical connections to
the mains supply in compliance with relevant local regulations.
Ensure that a professional electrician carries out the electrical
connections and that the following guidelines are followed:-
WARNING
4. MAINTENANCE
