TapFlo CTV Series, Iom Manual

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3. MAINTENANCE
IOM manual CTV vertical centrifugal pumps
14
3. MAINTENANCE
Maintenance work on electrical installations must be performed by qualified
personnel and only when the power supply has been shutoff. Follow the local
and national safety regulations.
Wait five minutes for capacitor discharge before opening any equipment.
3.1. Inspections
In general CTV range pumps do not require any maintenance. However depending on the
application, it may be necessary to periodically clean the internals of the pump to optimize
the performance. In addition, it is advised to:
➢
Periodically check discharge pressure.
➢
Inspect the motor according to the instructions from the motor manufacturer.
3.2. Location of faults
Failu
re
to
de
liv
er
th
e
liq
uid
In
su
ff
ici
en
t
ca
pac
ity
In
su
ff
ici
en
t
he
ad
Ir
re
gu
la
r
flow
Ele
ct
ric
cu
rr
en
t
too
hig
h
Pu
m
p
vib
rate
s
Possible reason Solution
X X
Liquid level too low See MIN start level – chapter 1.7 Example of installation
X X
Motor speed too low Check the motor and motor connection
X X X X
Impeller is clogged Clean the pump
X X X X
Impeller is damaged Replace the impeller
X
Impeller diameter to small Consult us for change
X X
Wrong direction of rotation See chapter 1.9 Motor connection for change of direction
X
NPSHa too low Consult us for more details
X X
Discharge piping clogged Clean the pump thoroughly
X X X
Suction or strainer clogged Check and clean
X
Pressure loses higher than expected Change piping system
X X
Air in the casing or discharge Check system for air pockets
X
Specific gravity higher than expected Increase the head with flow control valve
X X
Viscosity higher than expected Consult us for more details
X
Pressure loses lower than expected Increase the head with flow control valve
X X
Motor bearings worn Change bearings, check vapour seal
X X
Pump volute not submersed enough Check liquid level in the tank
X X X
Motor failure Check motor
X
Pump insufficiently fastened Check the pump mounting bolts