KSB CHTRa, Инструкция по установке и эксплуатации

Страница: 99 / 116

8 Trouble-shooting
99 of 116
CHTRa
8 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷ For any work performed to remedy faults, observe the relevant information
given in this operating manual and/or in the product literature provided by the
accessories manufacturer.
If problems occur that are not described in the following table, consultation with the
KSB customer service is required.
A Pump overheats and seizes
B Bearings have short life
C Pump vibrates and causes running noises
D Mechanical seal has short life
E Mechanical seal leaks excessively
F Pump requires excessive power
G Pump looses initial fill after start-up
H Insufficient pressure delivered
I Insufficient flow rate delivered
J Pump is running, but does not pump
Table 21: Trouble-shooting of system faults
A B C D E F G H I J Possible cause Remedy
✘ - - - - - - - - ✘ Pump not primed. Vent and prime pump and/or pipes.
- - ✘ - - - ✘ - ✘ ✘ Pump or suction line not completely
filled with fluid.
- - ✘ - - - ✘ - ✘ ✘ Suction lift too high or fluid level too
low. NPSH
a>
NPSH
r
Check for sufficient submergence.
Check installed strainers and valves,
remove any dirt.
✘
-
✘
- - - - -
✘ ✘
Insufficient margin between suction
pressure and vapour pressure
- - - - - - ✘ ✘ ✘ - Excessive amount of air or gas in fluid
handled
Check system and/or pipes and vent.
- - - - - - ✘ - ✘ ✘ Air pocket or vapour pocket in suction
line Check the suction line’s layout to rule
out the formation of any vapour
pockets; correct suction line layout if
necessary.
- - - - - - ✘ - ✘ - Air leaks into suction line. Check suction line is airtight.
- - - - - - ✘ - ✘ - Air leaks into pump through mechanical
seal, sleeve joints, pipe joints or plugs.
Check parts for damage and replace if
necessary.
Contact KSB.
- - ✘ - - - ✘ - ✘ ✘ Inflow rate too small. Check system design.
- - - - - - - ✘ ✘ ✘ Speed too low. Contact KSB.
- - - - - ✘ - - - - Speed too high. Contact KSB.
- - - - - - - ✘ ✘ ✘ Total head of system higher than
differential head of pump Check system losses.
Remedy or contact KSB.
- - - - - ✘ - - - - Total head of system lower than pump
design head
- - - - - ✘ - - - - Specific gravity of fluid different from
design
Check.
Contact KSB.
- - - - -
✘
-
✘ ✘
- Viscosity of fluid differs from viscosity
designed for