Servicing - VWR VP 86 Manual De Instrucciones

Automatic starting can cause personal injury and pump damage
When the operation of the pump is interrupted by the thermal switch, the pump will restart
automatically after cooling down.
 After triggering of the thermal protection or in the event of power failure, remove the
WARNING
pump's mains plug from the socket so that the pump cannot start uncontrollably.
 Attempt work on the pump only if the pump is separated from mains power.
7.3 Switching pump on and off
Switching pump on
The pump may not start up against pressure or vacuum during switch-on. If a pump starts against
pressure or vacuum, it may block. This activates the thermal switch, and the pump switches off.
 Make sure that no vacuum or pressure is present in the lines during switch-on.
 Switch on pump with mains switch (see fig. 2)
Switching off the pump/removing from operation
 When transferring aggressive media, flush the pump prior to switch-off to increase the service life of the
diaphragm (see chapter 8.2.1).
 Switch off pump with mains switch (see fig. 2).
 Open pressure and suction lines to normal atmospheric pressure.
 Disconnect the power source.
8.

Servicing

8.1 Servicing Schedule
Component
Pump
Filter (Accessory)
Diaphragm and valve plates/sealings
Tab. 5
8.2 Cleaning
When cleaning, make sure that no liquids enter the inside of the housing.
8.2.1 Flushing Pump
 Before switching off the pump, flush it with air (if neccesary for safety reasons: with an inert gas) for
about five minutes under atmospheric conditions (ambient pressure).
8.2.2 Cleaning Pump
 As far as possible, clean the parts with a dry cloth.
 Only use solvents for cleaning if the head materials cannot be attacked (check the resistance of the
material!).
 If compressed air is available, blow out the components.
8.3 Changing Diaphragm and Valves
Conditions
Pump is switched off and mains plug is removed from the socket

Pump is clean and free of hazardous materials

 Tubes removed from pump's pneumatic inlet and outlet
Spare part/tool
Spare part/tool
Service Set (according to chapter 10)
Philips-head screwdriver No. 1
Servicing interval
Regular inspection for external damage or leaks
Replace if it is dirty
Replace at the latest, when pump output decreases
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