Xylem WTS - Manual (Page 18)

Operating instructions
WTS 102/3-en 16
9. Air pocket in pipeline
•
vent
• improve course of pipe
10.
NPSH of system too small
increase liquid level
11.
Air being sucked in
•
increase liquid level
12.
Direction of rotation is wrong
•
swap over two phases of power supply (to be done by a specialist electrician)
13.
Inner components suffering from wear
•
replace worn parts
14.
Density and/or viscosity of liquid handled is too high
•
seek assistance
15.
Impeller out of balance
•
remove blocks/deposits
• replace if broken or unevenly worn
• check shafts to ensure that they are running true
16.
Coupling distance too small
•
change
17.
Forces in pipeline too high (pump unit under strain)
change (support pipes, use compensators, etc.)
18.
Too much, too little or the wrong type of lubricant
•
change
19.
Electricity supply not right
•
check voltage of all phases (2-phase running)
• check cable connections
• check fuses
20.
Bearing damaged
•
replace
• check lubricant and bearing space for pollutants (rinse oil area)
21.
Discharge too small
•
increase minimum amount carried (open slide valves, bypass)