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Maintenance
Major overhaul
For a
major overhaul, do the
following
in
addition to
the
tasks listed
under lnspection.
Service
item
Adion
Suppon
and
main
bearing
Repla(e
the
bearings
with
new bearings.
Mechanicalseal
Replace
with
new
seal
units.
Service in case of alarm
For
information about indication
values
for
sensors,
see
Sensor
connection (page
3'l
).
Seryice
item
Action
Ca
ble
'1.
lf
the
0uterjacket
is
damaged, replate the
cable.
2.
Check
that
ihe
cables
do
not have any sharp bends and are
not
pinrhed.
Connection to
power
Check
that the connecli0ns
are properly
tightened.
Electricalcabine$
Check
that they
are
clean and dry.
lmpeller
1.
Cherl the impeller dearan(e.
2.
Adiusl the impeller,
if
necessary.
lnspertion chamber
1.
Drain
all liquid,
ifany.
2.
Check
the
resistanre
ofthe
leakage sensor.
Normal value
approximatelyl200
ohms,
alarm approximately
430 ohms.
lnsulation
Use
a
megger maximum
1000
V.
1.
Check
that the
resistance between
the ground
(earth)and
phase
lead
is
more
than 5 megaohms.
2.
Conduct
a
phase{o-phase
resistanre check.
J
u
nclion
box
Checkthat it
is
clean and dry.
Level
regulators
Check
the
conditi0n
and
functionality.
Lilt
ng
devire
Cherk
that
local safety
requlations
are
Iollovied.
Lifting handle
1.
Check
the
strews.
2.
Che(k
the
ronditi0n ofthe lifting
handle.
3.
Replare
if
necessary.
0'rings
1.
Replace
the oil plug 0-rings.
2.
Replare
the 0-rings
ai
the
entrance
orjunction
cover.
3.
Grease
the
new
0.rings.
overload
proteition
and
other
protections
Check
the correct settings.
Personnel safeiy devices
Check
the guard
rails,
covers,
and
other protedi0ns.
Rotation
direction
Check
the impeller rotation.
Sealhousing
L
Fill
with
new
coolant,
if neressary.
2.
Checkthatthefreezing
pointislowerthan.l3"C{9"F).
Terminalboard
Cherk
that
the c0nnections are proper
y
tightened.
Ihermalcontads
Normally
closed
circuil; inlerval
0-'l
0hm.
Thermistor
Check
the
resistance
is
between
20-250
ohms
and
th€
measured
voltage
ismaximum2VDC.
Voltage and
amperage
Che(k
the running
values.
42
Flygt
31
7
I
lnsta
ilation, Operatio
n,
a
nd
lMaintenance
Manu
a
I
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