Maintenance - Pentair PVM Series Original Instruction Manual

EN
ORIGINAL INSTRUCTION
8.2 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 9

MAINTENANCE

DANGER - ELECTRIC SHOCK RISK
Before any intervention on the pump, disconnect the electrical mains. Ensure that the electrical power supply cannot be
restored inadvertently.
DANGER
Refer to the "safety instructions".
• 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.
• If motor must be installed or replaced
refer to coupling adjustment
instruction in appendix section.
12
• 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.
Bushing
Bypass valve
• If the pump and motor are used
infrequently with long intervals of non-
operation, then we recommend that
the motor be greased.
• Coupling adjustment
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.