Flowserve CPXM - Manual (Page 15)

CPXM and CPXRM USER INSTRUCTIONS ENGLISH 71569101 10-08
Page 15 of 32 flowserve.com
4.7 Protection systems
The following protection systems are
recommended particularly if the pump is installed in a
potentially explosive area or is handling a hazardous
liquid. If in any doubt consult Flowserve.
If there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of the
liquid does not rise to an unsafe level.
If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
prevent it from being started. This is particularly
relevant if the pump is handling a flammable liquid.
If leakage of product from the pump or its associated
sealing system can cause a hazard it is
recommended that an appropriate leakage detection
system is installed.
To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring are carried out.
5 COMMISSIONING, START-UP,
OPERATION AND SHUTDOWN
These operations must be carried
out by fully qualified personnel.
5.1 Pre-commissioning procedure
5.1.1 Lubrication
Electric motors are supplied pre-greased and are
normally sealed for life. If in doubt, refer to motor
instruction manual.
5.2 Open impeller clearance
The impeller clearance is set in the factory. This may
require adjustment because of piping attachment or
increase in temperatures. For setting instructions see
section 6.7, Setting impeller clearance.
5.3 Direction of rotation
Briefly run or jog the motor and observe
the direction of rotation of the coupling or motor fan.
Ensure the pump is given the same direction of rotation
as the pump direction arrow on the bracket.
If maintenance work has been carried
out to the site's electricity supply, the direction of
rotation should be re-checked as above in case the
supply phasing has been altered.
5.4 Guarding
Guarding is supplied fitted to the pump set. If
this has been removed or disturbed ensure that all the
protective guards are securely refitted.
5.5 Priming and auxiliary supplies
5.5.1 Filling and priming
Ensure inlet pipe and pump casing is
completely full of liquid before starting continuous
duty operation.
Priming may be carried out with an ejector, vacuum
pump interceptor or other equipment, or by flooding
from the inlet source.
When in service, pumps using inlet pipes with foot
valves may be primed by passing liquid back from the
outlet pipe through the pump.
5.5.2 Auxiliary supplies
Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.
5.6 Starting the pump
a) Ensure flushing and or heating
liquid supplies are turned ON, before starting pump.
b) CLOSE the outlet valve.
c) OPEN all inlet valves.
d) Prime the pump.
e) Start motor and check the outlet pressure.
f) If the pressure is satisfactory, slowly OPEN the
outlet valve.
g) Do not run the pump with the outlet
valve closed for a period longer than 30 seconds.
h) If NO pressure, or LOW pressure, STOP the
pump. Refer to section 7, Faults; causes and
remedies for fault diagnosis.
5.7 Running the pump
5.7.1 Pumps fitted with mechanical seal
Mechanical seals require no adjustment. Any slight
initial leakage will stop when the seal is run in.