4
Caution
Be sure to use “Earth-Leakage Circuit Breaker (ELCB)” and overload protection
device to avoid a damage to the equipment or motor burnout.
Do not start and stop the motor more than once in a minute. Constant ON/OFF
cycles may cause a motor burnout.
NOP coolant unit must not be operated outdoor.
Hoist the pump at designated lifting points. Check the lifting points on the drawing.
When hoisting the pump, make sure that the weight is balanced or it may tip over.
Assembling the pump in a wrong orientation will damage the motor. Install the pump
unit in an up-right position.
If the installation site is not level or if there is forcible installation in which the
installation holes are not in exact alignment, the pump might be damaged due to
vibration.
Tramp oil or foam may affect the pump performance. NOP coolant unit must not be
installed in such environment.
Remove the large objects with pre-filtration device, such as a plate (screen-type)
filter before the pump inlet. Recommended filter mesh size is 18 (about 1mm sieve
size).
Suction of excessive amount of needle-like or wool-like metal chips may cause
clogging on inlet port, cyclone filter even when their particle sizes are smaller than
3 mm.
If you install additional in-line filter onto the outlet line, clean it regularly.
Clogged filters affect the pump performance and abnormal noise, vibration or flow
deficiency may occur.
Tramp oil or foam may affect cyclone filter performance. Installation of partition
plate is recommended.
Diameter of contaminant drain piping must be the same as /or larger than
contaminant drain port. Contaminant drain piping must not be higher than 1 M from
the ground and not be longer than 3 M horizontally. The piping must be as short as
possible. (PVC piping is recommended).
Inspect all valves, cocks, joints and the like before installation to avoid using any
component that has a cavity in the casting.
Do not narrow the contaminant drain port. Excessive flow restriction( ≦20L/min)
may decrease the pump performance and damage the pump.
A gate valve is highly recommended for a contaminant drain line.
Do not attach the end of contaminant drain line high above the tank liquid surface
or nearby pump suction port. It may generate foam and suction of foam may cause
flow deficiency in outlet line.
Be sure to follow the instruction of torque control specified on Table 3 on P11.
Do not use liquid type sealant. Do not use sealant tape too much. Excess use of
sealant tape may result in over-torque and damage the port.
Do not attempt to flush out piping if already assembled with the pump.
Airtight test must be completed before installation.
Do not run the pump in reverse direction.
Do not run the pump dry over 10 second.
