Lowara LEZ 200-250 UNL 2204 [16/19] Model ler lers lez
Макгруп McGrp.ru
Задайте вопрос
Зарегистрироваться

Lowara LEZ 200-250 UNL 2204 [16/19] Model ler lers lez

Lowara LRZ 50-125 U 112 [16/19] Model ler lers lez
Installation, Operation and Maintenance Instruction
Model LER, LERS, LEZ
LER 100-english page 13
Revision 01
Article No 771073302
Issue 01/2010
Discharge too low
Discharge stops after a time
Head too low
Head too high
Drive mechanism overloaded
Pump not running quietly
Temperature in pump too high
Temperature in shaft sealing too high
Temperature at the bearing too high
Pump leaking
Leakage rate at shaft sealing too high
Cause
Solution
Back-pressure too high
check facility for pollution, open discharge valve
reduce resistance in discharge pipe (e.g. clean filter if
necessary)
use larger impeller (note available motor power)
Back-pressure too low, discharge too low throttle discharge valve
Speed too high reduce speed
compare speed of motor with specified pump speed (rating
plate)
when adjusting speed (frequency transformer) check reference
value setting
Speed too low increase speed (check available motor power)
compare speed of motor with specified pump speed (rating
plate)
when adjusting speed (frequency transformer) check reference
value settings
Flow too little increase min. flow (open discharge valve, bypass)
Flow too big reduce flow (throttle discharge valve)
Impeller diameter too big use smaller impeller
Impeller diameter too small use larger impeller (check available motor power)
Pump and/or pipes not completely filled with liquid fill
vent
Pump or suction/intake pipe blocked clean
Air pocket in pipeline vent
improve course of pipe
Suction height too big / NPSH of system too small
increase liquid level and admission pressure
reduce resistance in the intake/suction pipe (change course
and rated width, open shut-off valves, clean filters)
Air being sucked in increase liquid level
check if suction pipe is vacuum-tight
Air being sucked in through shaft sealing clean sealing pipe
increase sealing pressure
replace shaft sealing
Direction of rotation is wrong swap over two phases of power supply (to be done by an
electrician)
Inner components suffering from wear replace worn parts
Density and/or viscosity of liquid handled is too high seek assistance
Lines and roughness at shaft replace parts
Deposits on mechanical seal
clean
replace mechanical seal if necessary
if necessary provide additional rinsing or quench
Impeller out of balance
remove blocks/deposits
replace impeller if broken or unevenly worn
check shafts to ensure that they are running true
Forces in pipeline too high (pump unit under strain) change (support pipes, use compensators, etc.)
is foundation plate/frame properly cast in place?
Electricity supply not right (2-phase running) check voltage of all phases
check cable connections and fuses
Sealing insufficient tighten screws
replace sealing
Bearing damaged replace
Relief fittings insufficient
clean relief openings in impeller
replace worn parts (impeller, split rings)
adjust in line with the system pressure/intake pressure given on
ordering
System-related vibrations (resonance) seek assistance

Содержание

Похожие устройства

Скачать