salmson MUV Instalacion Y Puesta En Servicio página 11

ENGLISH
8 . OPER TING DEF ULTS
Before any operation,
SWITCH OFF the pump.
If the liquid is toxic, corrosive or dangerous for human
being, S LMSON must be informed or the qualified
person in charge of the repairing. In this case, clean
the pump to ensure a complete safety to the repai-
ring man.
DEF ULTS
8.1 PUMP TURNS a) The internal parts are obstructed
BUT NO DELIVERY by particles :
b) Suction pipe obstructed :
c) ir in suction pipes :
d) Pump is no more primed :
e) Suction pressure is too low,
it causes cavitation noise :
f) The supply voltage of the motor
is too low :
8.2 THE PUMP VIBR TES a) Loose on its foundation :
b) Particles obstructing the pump :
c) Difficult rotation of the pump :
d) Bad electrical connection :
8.3 THE MOTOR OVERHE TS a) Voltage too low :
b) Pump obstructed by particles :
c) mbient temperature above + 40°C :
d) Coupling failure in the terminal box :
8.4 THE PUMP DELIVERS a) The motor fails to run at its normal speed
INSUFFICIENT PRESSURE (particles...) :
b) The motor is defective :
c) Bad filling of the pump
d) The motor turns in the wrong way
(three-phase motor) :
e) The drain-priming plug is not correctly
tightened :
f) The supply voltage of the motor is too low :
8.5 THE CIRCUIT-BRE KER a) The setting of the thermal relay is not
DEVICE IS ON adequate (too low) :
b) The voltage is too low :
c)
d) The thermal relay of the circuit-breaker is
defective :
e)
8.6 THE FLOW IS IRREGUL R a) The suction head (Ha) is not adequate :
b) The suction pipe has a lower diameter than
the one of the pump :
c) The strainer and the suction pipe are
partially obstructed :
C USES
phase is cut :
fuse is off :
a) Dismantle the pump and clean it.
b) Clean all the pipes.
c) Check tightness of the whole pipe up to the pump and make it tight.
d) Fill the pump to prime again. Check foot valve is tight.
e) Too high loss of head on suction or suction head (check the NPSH of the pump installed and
of the installation).
f) Check the voltage on the terminals of the motor and the cross-section of the conductors.
a) Check and tighten completely the nuts of the stud bolts.
b) Dismantle the pump and clean it.
c) Check the pump turns freely without abnormal sticking.
d) Check the connections to the pump motor.
a) Check voltage on terminals of the motor, it should be within ± 10 % in 50 Hz or ± 6 % in 60 Hz
of the rated voltage.
b) Dismantle the pump and clean it.
c) The motor is aimed at operating at a maximum ambient temperature of + 40°C.
d) Be in conformity with the motor plate and see figure 4.
a) Dismantle the pump and solve the defect.
b) Replace the motor.
c) Open the bleeding device and drain until there are no more air bubbles.
d) Reverse the sense of rotation by interchanging the two phase wires on the motor terminal
box.
e) Check it and screw it again.
f) Check the voltage on the terminals of the motor and the cross-section of the conductors.
a) Check the current with an ammeter or set the value of the current rating on the motor data
plate.
b) Check the adequate cross-section of the conductors of the electrical cable.
c) Check it and change the electrical cable if necessary.
d) Replace it.
e) Replace it.
a) Study again the installation conditions and the recommendations described in this instruction.
b) The suction pipe must have the same diameter as the suction pump port.
c) Remove and clean.
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REMEDIES