4
H2
H1
off
on
Installation
1. Check the following before beginning installation.
Insulation resistance measurement:
With the motor and cable (excluding the power supply cable) immersed in water, use a Megger to measure the insulation
resistance between ground and each phase of the motor, and again between each phase of the motor. The Megger should
indicate an insulation resistance of not less than 20mega ohms. While making the measurement, keep the power supply ca-
ble off the ground.
We recommend that an auxiliary pump be kept on hand in case of emergency.
2. Installation
Fig-1
Fig-2
Operating Water Level
Stop Water Level
H1: Lowest water level (Motor flange)
H2: Operating water level
This must be above the top of the motor
1.! WARNING : Under no circumstances should cable be
pulled while the pump is being transported or installed.
Attach a chain or rope to the grip and install the pump.
2.This pump must not be installed on its side or operated a dry
condition. Ensure that it is installed upright on a secure base.
3.Install the pump at a location in the tank where there is the least
turbulence.
4. If there is a flow of liquid inside the tank, support the piping
where appropriate.
5.Install piping so that air will not be entrapped. If piping must be
installed in such a way that air pockets are unavoidable, install
an air release valve wherever such air pockets are most likely to
develop.
6.Do not permit end of discharge piping to be submerged, as
backflow will result when the pump is shut down.
7..! WARNING : Non-automatic pumps do not have an automatic
operating system. Do not operate the pump for a long time with
the water level near the lowest water level(H1) as shown in
Fig.1, as the automatic cut-off switch incorporated inside the
motor will be activated.
8.To avoid dry operation, install an automatic operating system so
that this will not happen, as shown in Fig.2 and maintain a safe
operating water level.
Electrical wiring
1.Wiring
A) Wire as indicated for the appropriate start system as shown in Fig-3 & 4 for singlephase version and Fig-5 for three phase.
B) Loose connections will stop the pump. Make sure all electrical connections secure.
C) For three phase motors - Operate the pump for a short time (1 or 2 seconds) to verify the rotation of direction of the impeller, if its recoil
is in counterclockwise direction, the direction of its rotation is correct. If not please switch two of the three power cords to correct the
rotation of direction of the impeller.
D) Make sure to check the pump’s direction of rotation with the pump exposed to the atmosphere. Operating the pump with reversed rota-
tion while in submerged condition under water will most likely to damage the pump, which may lead to leakage and electrical shock.
2.Cable
WARNING : Never let the end of the cable contact water.
A) If the cable is extended, do not immerse the splice in water.
B) Do not pull the cable.
C) Install the cable so that it will not overheat. Overheating is caused by coiling the cable and exposing it to direct sunlight.
3.Grounding
To ground the green (yellow/green) wire. Under no circumstances should the green (yellow/green) wire be connected to the power sup-
ply directly.
4. WARNING : Use short circuit breakers to prevent danger of electrical shock.
5. WARNING : Never start the pump while it is suspended, as thepump may jerk and cause serious accident involving injury.
Fig-3 Fig-4 Fig-5
Black
Green
White
Red
(Yellow/Green)
(Green/Yellow)
Frame grounding
Ground
Overload protector
R
S
T
PE
U
V
W
U2
W2
V2
Black
(Brown)
(Blue)
White
Green
(Yellow/Green)
Frame grounding
Ground (Green/Yellow)
Thermal
Protector
L
N
PE
Main
Auxiliary
(Yellow/Green)
Capacitor
Black
(Brown)
(Blue)
White
Green
Frame grounding
Ground (Green/Yellow)
Thermal
Protector
L
PE
Main
Auxiliary
N
Thermal
Protector
Black
(Brown)
(Blue)
White
Green
(Yellow/Green)
Ground (Green/Yellow)
Frame grounding
Main
Auxiliary
Capacitor
(Green/Yellow)
PE
Float Switch
