VERDER JEC JRZW Series, Operation And Maintenance Manual

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8
INSTALLATION
INSTALLATION
1. Mounting surface should be flat and level.
2.
The suction line should be kept as short as possible and present minimum friction
loss.
3. Suction and discharge lines must be fully supported and installed so that no
expansion or shock forces act on the pump which could lead to distortion.
4. Ensure sufficient clearance around the motor and pump.
START UP
1. Before connecting the suction and discharge pipe work the entire system must be
thoroughly cleaned to prevent damage from welding, grinding and other residues.
2.
Before starting, bump the motor to check if the motor fan is rotating clockwise when
seen from the motor back. If the motor fan cannot be seen, look through the pump
case adaptor after takeoff motor shroud. (Bump means to momentarily apply power
to the motor and then immediately remove power).
3. Direction of rotation must only be checked with a completely filed system. Where
double mechanical shaft seals are installed the flush supply must be operational. Any
dry running will result in seal damage.
4.
The motor rating plate should be checked to ensure that it is in accordance with the
available electrical supply. It is essential that the full load current is not exceeded to
prevent motor overload.
5.
Before start up any safety guards required by local statutory regulations should be
fitted.
Pay attention to circumstances that could indicate pump cavitation;
1. Low pressure in the suction line due to bad suction conditions.
2. Air in the suction inlet line.
3. Pumping temperature is too high.
4. Pump is oversized.