WITA ADELINO AJ-Serie Installation Und Betriebsanleitung Seite 34

8. The packaging materials that are removed after installation
and use must be disposed of in accordance with the respective
local laws.
6. Maintance
6.1 Regularly inspect the insulation resistance between the
enclosure and the winding of the electric pump, which shall not
be less than 5MΩ when the operating temperature is nearly
achieved. Otherwise, the use of the pump shall not be allowed
until the corresponding maintenance measures are taken and
the relevant requirements are met.
Warning
6.2 Prior to any repair or maintenance operation, please cut
off the power supply and make sure that the motor will not be
powered on by accident during repair or maintenance.
6.3 After 2000 hours of normal use of the electric pump, the electric pump shall be delivered to a qualified repair station
for maintenance and repair as per the following steps: dismantle the pump and inspect various quick-wear parts such
as the bearing, mechanical seal, impeller, and bottom valve. Please immediately replace those damaged ones.
Check valve
6.4 When the ambient temperature is lower than 4°C, please
completely drain the water accumulated in the pump chamber
to avoid frost-cracking the pump body. Before starting the
Notice
electric pump again, inspect whether the pump spindle can
rotate normally and then fill the pump chamber with water.
6.5 If the electric pump will not be used for a long time, please
disassemble the piping, drain the water accumulated in the
pump, clean the main parts and components, carry out rust-
proof treatment, and keep it properly at a dry and well-ventilated
place.
6.6 Air tight test: after the pump is disassembled for the repair
or replacement of any seal, the bearers and the complete pump
shall go through water (or air) pressure tests based on the
Notice
maximum operating pressure for at least 3 minutes and there
shall be no phenomenon of leakage or sweating.
09
Guide vane
Impeller
Jet pipe
Mechanical seal
5
Bearing
Drain plug
5