Maintenance - Pentair PVM Serie Instrucciones De Funcionamiento

EN
ORIGINAL INSTRUCTION
7.1 OPERATION
• Start the pump and check the direction
of rotation of the motor (Three –Phase
motors).
WARNING
If the pump is installed in a location where it is subject to freezing when not in operation, then the pump and the pipe system
should be drained to prevent damage from freezing.
7.2 OTHERS
(ONLY FOR PVM/PVMI/PVMX 1, 3, 5 SERIES)
• For these pumps, it is advisable to
open the bypass valve during start-up.
The bypass valve connects the suction
and discharge sides of the pump, thus
making the filling procedure easier.
When the operation is stable, the
bypass valve can be closed.
CHAPTER 8

MAINTENANCE

PVM/PVMI/PVMX Vertical Multistage Centrifugal Pumps
WARNING
Before starting maintenance work on the pump, the motor, or other parts of the system, make sure that the power supply
has been switched off.
• The pump does not have a
recommended maintenance schedule.
• If the motor is fitted with grease
nipples, then the motor should be
lubricated with a high temperature
lithium-based grease. If not, then
the motor does not require regular
maintenance.
8
• Start the pump, keeping the on-off
valve of the discharge side of the pump
closed. Then, open the on- off valve
slowly. The pump must run smoothly
and noiselessly. If not, then it may be
necessary re-prime the pump.
• If the pumped liquids contains air, it
is advisable to leave the bypass valve
open if the operating pressure is
lower than 6 kg/cm². If the operating
pressure constantly exceeds 6 kg/
cm² the bypass valve must be closed.
Aftapplug
Bypassventiel
• If the pump and motor are used
infrequently with long intervals of non-
operation, then we recommend that
the motor be greased.
• Coupling adjustment
• Check the current drawn by the motor.
If necessary, adjust the setting of the
thermal relay.
• Any air pockets trapped inside the
pump may be released by adjusting the
air screw.
Otherwise the material at the opening
will be worn because of the high liquid
velocity.
• If the pump is used for applications
with drinking water for human
consumption and it is not used for a
long period, repeat the procedures
listed in Installation chapter.