Lubrication; Temporarily Quiescing; Periodical Inspection - Pentair VLR Serie Manual De Instrucciones

GB
CHaPter 5
MaIntenanCe

5.1 LUBRICATION

• The seal on the shaft is self-adjusting
• The seal surfaces are wear-resistant
and are lubricated by the pumped
fluid
ATTENTION
If the machines are installed, used and maintained according to the instructions contained in this manual, they do not
need lubrication. Comply with the instructions of this manual.

5.2 TEMPORARILY QUIESCING

Carry out the following operations to set the machine to quiescing for a long period of time.
Cut-off the power supply system by means of the cut-off switch.
Carry out the following operations if it is possible that ambient temperature falls under the pumped fluid freezing temperature.
A - If the whole system must be set to quiescing, empty the system.
B - SIf the whole system must not be set to quiescing:
• Close the gates on the delivery and
suction piping
• Remove the priming cap and the drain
and discharge cap (if present)
DANGER
In case of high temperature fluids, wait for an adequate time for the fluid contained in the machine to cool before
unscrewing the screws securing the machine to piping.
ATTENTION
Before restarting the machine fill it as shown in "Use", "Priming".

5.3 PERIODICAL INSPECTION

Carry out the following checks at regular time intervals:
• Hydraulic performances
• No fluid leakage
• Motor overheating
A - If the checks do not find malfunctions, keep on using the machine up to another inspection.
B - If the checks find malfunctions, carry out the following operations:
• Make reference to the table "Defect/
Cause" in "Operation troubles"
42
• The machine plain bearings are
lubricated by the pumped fluid
• The motor ball bearings are self-
lubricated by heat-resistant grease
• Discharge all the fluid from the
machine
• Relay intervention time
• Start frequency
• Automatic control correct operation
• If the defect and the cause are
listed in the table "Defect/Cause"
in "Operation troubles", contact an
authorised technician or a skilled
technician and show them the cause
of the found defect
• Electric motors with grease cup:
lubricate every 1500 functioning
hours with bearing grease
• Hold the priming cap and the drain
and discharge cap for a new machine
employment without refitting them.
• Vibrations
• Noise
• If the defect and the cause are not
listed in the table "Defect/Cause"
in "Operation troubles", contact an
authorised technician or a skilled
technician