9
o
During start-up, start the motor with a low-speed set point if possible, then gradually increase
speed to the intended operating speed. An acceleration rate of 200 rpm / sec or less is
recommended; 50 rpm / sec is best, allowing ample acceleration time for downstream apparatus
to fill gradually with fluid, and for pressure to rise slowly.
C.8 Operation and Maintenance
–
Safety
i
NOTE
The manufacturer’s warranty will be void if any part is replaced, or the pump is modified in any
way, without permission from Imo Pump.
DANGER
Dead-head condition occurs when the there is a blockage upstream and the pump attempts to
reach the maximum pressure achievable at a given speed, with a given fluid viscosity.
Reaching the dead-head condition may cause the pump to fail, or for piping limits to be
exposed.
WARNING
Downstream pressure can change rapidly once the pump is started. If the downstream flow
passages are blocked or valves are closed, the pump will likely reach dead-head condition
before valves can be opened or the blockage removed.
i
NOTE
Only
trained, specialized personnel
are qualified to perform maintenance, which includes, but
is not limited to:
o
Inspection
o
Repair
o
Assembly
o
Disassembly
Contact Imo Pump for information on training personnel.
Measure the pump temperature after installation, and monitor temperature during operation. Rapid
changes in temperature, while process temperatures and ambient temperatures are stable, signals a
pending failure. Make use of every provided temperature measurement connection point, i.e.
thermocouple mounting points, etc.
C.9 Airborne Noise
The Airborne noise levels of the Pumps are lower than the levels generated by the motor used to drive the
pumps. Please refer to Motor Manual for Sound Power level data.
C.10 Pumps with Magnetic Coupling
Magnetic couplings use strong permanent-magnets, which generate a strong magnetic field. The installation
must be carried out only by trained, specialized personnel. All installation instructions must be strictly
followed. Modifications or changes to the magnetic coupling, or its components, are not allowed. The
manufacturer does not take responsibility for damage caused by improper use.
