Lowara LEZ 200-250 UNL 2204 [13/19] Model ler lers lez
Макгруп McGrp.ru
Задайте вопрос
Зарегистрироваться

Lowara LEZ 200-250 UNL 2204 [13/19] Model ler lers lez

Lowara LEZ 250-350 UNL 2206 [13/19] Model ler lers lez
Installation, Operation and Maintenance Instruction
Model LER, LERS, LEZ
LER 100-english page 10
Revision 01
Article No 771073302
Issue 01/2010
Turn pump unit once again by hand and check
that it moves smoothly and evenly.
Open valve in suction /intake pipe.
Set discharge side valve to approx. 25% of rated
flow quantity. With pumps with a discharge branch
rated width less than 200, the valve can remain
closed when starting up.
Secure, that unit is electrically connected acc. to
all regulations and with all safety devices.
Check direction of rotation by switching on and off
briefly. It must be the same as the directional
arrow on the drive lantern.
6.2 Switch on drive
Immediately (max. 30 seconds on 50 Hz resp.
max. 20 seconds on 60 Hz currency feed) after
reaching normal operating speed open discharge
valve and adjust the required operating point. The
pumping data shown at the type plate resp. in the
data sheet and / or the order confirmation must be
met. Every change is only permitted after talking
with the manufacturer!
Operation with clos
ed valve in the suction and /
or discharge piping is not permitted.
On starting-up without back-pressure, the back-
pressure must be produced through throttling at
the discharge side. After reaching full back-
pressure open valve.
If pump does not re
ach attended head or if
atypical sounds or vibrations do occur:
Switch off pump (see chapter 6.7) and seek for
causes (see chapter 10).
6.3 Restarting
Basically, the same procedure should be followed as
for starting up for the first time. However, there is no
need to check the direction of rotation and the
accessibility of the pump unit.
The pump should only be automatically restarted if it
has been made sure that the pump has remained
filled whilst stand by.
Be particularly careful not to touch hot ma
chine
parts and when working in the unprotected shaft
seal area. Remember that automatically
con
trolled systems may switch themselves on
suddenly at any time.
Suitable warning signs
should be affixed.
6.4 Limits of Operation
The operating limits of the
pump / unit regarding
pressure, temperature, performance and speed
are shown in the data sheet and / or order
confirmation and must be observed under any
circumstances!
Do not exceed the output given on the motor
name plate.
Avoid sudden changes in temperature
(temperature shocks).
The pump and motor should run evenly and
without vibrations; check at least once a week.
6.4.1 Flow min. / max.
If no other data are given in the curves or data sheets,
the following is valid:
Q
min
= 0,1 x Q
BEP
for for short time operation
Q
min
= 0,3 x Q
BEP
for continuous operation
Q
max
= 1,2 x Q
BEP
for continuous operation *)
Q
BEP
= Flow in efficiency optimum
*) on condition that NPSH
facility
> (NPSH
pump
+ 0,5 m)
6.4.2 Abrasive Media
On pumping liquids with abrasive c
an increased wear at hydraulic and shaft sea
ling
must be expected. The intervals of inspec
tion
should be reduced compared to the usual
times.
6.4.3 Permitted number of starts
The permitted number of starts of the pump must not
be exceeded, see diagram 6.
1,0
10,0
100,0
1 10 100 1000
Motor power [kW]
max. perm. starts/h
Diagram 6
With electric motors, the permitted number of starts is
given in the attached motor operating instructions.
If two different figures are given, the lower figure is
valid.
6.5 Lubrication
The bearings are grease lubricated for lifetime and
therefore maintenance-free.
6.6 Monitoring
Regular monitoring and maintenance will ex
tend
the life of your pump or pump system.
Pumps which are exposed to corrosive chemicals
or to wear through abrasion must be inspected
periodically for corrosion or wear and tear. The
first inspection should be carried out after six

Содержание

Похожие устройства

Скачать