Servicing And Maintaining The Product - Grundfos SE Serie Instrucciones De Instalación Y Operación

10. Servicing and maintaining the product

Pumps with inlet flange A40 (DN 100) or A60 (DN 150)
(pressure versions S and H) in vertical position do not
comply with the stability requirement of standard EN 809
(stable when tilted to an angle of 10 °). Use a service
stand to support the pump.
Product numbers for service stand
Inlet flange size A40 (DN 100): 98669229.
Inlet flange size A60 (DN 150): 98669251.
WARNING
Crushing hazard
Death or serious personal injury
‐
Always support the pump by lifting chains or place it in
horizontal position to secure stability.
DANGER
Electric shock
Death or serious personal injury
‐
Before starting any work on the product, make sure
that the power supply is switched off and it cannot be
switched on unintentionally.
DANGER
Electric shock
Death or serious personal injury
‐
Make sure the pump is grounded.
The maintenance and service work on explosion-proof
FM
pumps must be carried out by Grundfos or an authorized
service workshop.
Do not open the pump if the ambient atmosphere is
FM
explosive or dusty.
Maintenance and service must be carried out by qualified
persons.
Before carrying out maintenance and service, make sure that the
pump is thoroughly flushed with clean water. Rinse the pump parts
after dismantling.
Pumps running normal operation should be inspected every 2000
operating hours or at least once a year. If the pumped liquid is
muddy or sandy, the pump should be inspected every 1000
operating hours or every six months.
Frequency converter use may reduce the lifespan of the
bearings and the shaft seal, depending on the operating
mode and other circumstances.
Check the following:
• Power consumption
• Motor liquid level.
When the pump is new or after replacement of the shaft seals,
check the motor-liquid level and its water content after one week of
operation. If the motor-liquid level has dropped, the shaft seal may
be defective.
Disposal of the motor liquid must comply with local
regulations.
20
Quantity of motor liquid
Number of poles
SE
[qt (l)]
2 13.5 (12.8)
4 13.5 (12.8)
6 14.9 (14.1)
• Cable entries: Make sure that the cable entries are waterproof
and the cables are not sharply bent or pinched.
• Impeller clearance: Check the impeller clearance.
• Pump parts: Check the pump housing and other parts for
possible wear. Replace defective parts.
• Ball bearings: Check the shaft for noisy or heavy operation
(turn the shaft by hand). Replace defective ball bearings.
• General maintenance: It is usually required in case of defective
ball bearings or poor motor function. This work must be carried
out by an authorized service workshop.
Replace the ball bearings at least every 25.000 operating
FM
hours.
SL
[qt (l)]
4.7 (4.5)
4.7 (4.5)
5.7 (5.4)