4.6.3 Double mechanical seal - tandem arrangement ________________________________ 28
4.7 Electrical connections ________________________________________________________ 28
5. Start-up / shut-down__________________________________________ 30
5.1 Start-up ___________________________________________________________________ 30
5.1.1 Check application conditions ______________________________________________ 30
5.1.2 Starting up the pump ____________________________________________________ 30
5.1.3 Functional check of mechanical seal ________________________________________ 31
5.2 Shut-down _________________________________________________________________ 31
6. Maintenance / servicing _______________________________________ 32
6.1 Safety instructions for maintenance, inspection and installation work____________________ 32
6.2 Maintenance of the pump _____________________________________________________ 33
6.3 Maintenance of the motor _____________________________________________________ 33
6.4 Maintenance of CN bearing____________________________________________________ 33
6.4.1 Bearing lubrication ______________________________________________________ 33
6.4.1.1 Cylinder bearing greases _____________________________________________ 33
6.4.1.2 Grease quantities for roller bearings during assembly_______________________ 34
6.4.2 Bearing replacement_____________________________________________________ 34
6.4.2.1 Premature bearing replacement________________________________________ 34
6.5 Assembly__________________________________________________________________ 35
6.5.1 Parts overview _________________________________________________________ 35
6.5.2 Instructions for assembly _________________________________________________ 37
6.6 Assembly of Contra CN_______________________________________________________ 38
6.6.1 Assembly of coupling and motor____________________________________________ 39
6.6.2 Mechanical seal arrangements_____________________________________________ 40
6.6.3 Different fixing of seal cartridge ____________________________________________ 41
6.6.4 Assembly of the single mechanical seal ______________________________________ 42
6.6.5 Assembly of the double mechanical seal _____________________________________ 44
6.6.6 Assembly of the double mechanical seal, back to back __________________________ 48
6.6.7 Assembly of impellers and casings__________________________________________ 50
6.7 Troubleshooting_____________________________________________________________ 54
6.8 Disposal___________________________________________________________________ 55
6.9 HILGE assembly tool kit ______________________________________________________ 56
6.9.1 Content and use ________________________________________________________ 56
7. Certificate of non-objection____________________________________ 57
7.1 Certificate of non-objection ____________________________________________________ 57