Micropump GN Series Installation, Operation and Warranty Information - Manual (Page 15)

15
DOC No: 7046 REV G
Ensure the pump head temperature does not exceed the flash point
temperature of the fluid or area.
Flow rate should always be adjusted by controlling motor speed where
possible. Ensure that overpressure does not occur in the discharge pipe.
NEVER throttle flow by the inlet valve.
Starting or running the pump with the discharge valve closed will
overload motor resulting in overpressure in the discharge pipe.
Check that the pump is rotating in the correct direction. This should be
clockwise when viewing the drive shaft of the drive unit. If the direction
of rotation is incorrect check the motor electrical connections.
Post Start-up Checks
Once the pump has started, carry out the following checks:
• Check that the pump and motor operate smoothly and are free from vibration.
• Check the inlet and discharge fittings are free from leaks.
Operation
Start-up Procedure
Before starting the pump ensure that any valves in the inlet or discharge lines are open
and that any inlet filters are clean and free from obstruction.
Once started the pump should prime if it has not already been filled with fluid. If the
pump fails to prime, stop the pump and fill the pump head with liquid.
Shut-down Procedure
Switch off the motor and check that the unit runs down in a steady manner. Close the
inlet and discharge valves. Drain the pump if it is to be shut-down for long periods or
installed in areas where the liquid may freeze. Refer to the Maintenance section for
instruction on draining.
Extended periods of dry running may result in permanent damage to
the pump and may cause surface temperature to exceed the operating
temperature of the pump. Ensure that the pump head temperature does
not exceed the flash point temperature of the fluid or area. Shut down
pump for no fluid condition. Shut down pump for no flow condition.
Dry Running. Dry running for short intervals (i.e. when dry lifting to prime the
pump) may not adversely affect pump performance.
Series CA centrifugal pumps cannot handle mixed phase (gas/fluid) pumping.
Contact your local Micropump distributor or contact Micropump directly for
alternate pump options.
Series CA, GA, GAH, GAP, GB, GC and GD pumps cannot operate
conventionally in reverse.
Series CA pumps do not have suction pull capability and will not pump
without fluid supplied to the inlet.
CAUTION
NOTE
CAUTION
CAUTION
NOTE
NOTE