Flowserve MENBLOC - Manual (Page 22)

MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13
Page 22 of 40 flowserve.com
5.4 Starting the pump
5.4.1 Bring controls and preparation before the
first starting and after each service call
Necessarily:
a) Check the tightening of the different plugs.
b) Check that the motor bearings are correctly
greased (where regreasing is possible).
c) Guarding is supplied fitted to the
pump set. If this has been removed or
disturbed ensure that all the protective guards
are securely refitted.
d) Open all inlet valves (if existing).
e) Close the outlet valve and the bypass valve
f) Ensure inlet pipe and pump casing are
completely full of liquid.
g) Make sure that the motor fan cowl is not
obstructed or too near to a wall or obstruction.
5.4.2 First pump start-up
Suction valves must be fully open
when pump is running. Never run the pump dry, it
will cause damage.
a) Check the direction of rotation is as indicated
by the arrow on the motor casing or cover,
using a brief burst of power. If it is not correct
then isolate the motor and reverse the
connection of two phases.
b) Start motor and check outlet pressure.
c) If pressure is satisfactory, slowly OPEN the
outlet valve.
d) Do not run the pump with the outlet valve
closed for a period longer than 30 seconds.
e) If NO pressure, or LOW pressure, STOP the
pump. Refer to faultfinding chart for fault
diagnosis.
The pump should run smoothly and without
vibration.
The pump must never run at a capacity of less
than 40 % of that at the best efficiency.
Never remove a plug when the pump is
running.
a) When the unit is normally running, note the
maximum intensities absorbed on each phase.
b) Adjust definitively the circuit breaker for a
slightly greater current to the maximum
noticed current, which must never be superior
to the currents, indicated on the motor
description plate.
c) Check that the voltage between phases in the
motor terminals is correct.
A well-adjusted and maintained circuit breaker
efficiently protects the pump unit.
Any disjunction means that the unit is badly
running (voltage loss, cut phase, misadjustment,
foreign matter in the pump, jamming, etc.).
5.5 Running the pump
5.5.1 Venting the pump
Vent the pump to enable all trapped air to
escape taking due care with hot or hazardous
liquids.
Under normal operating conditions, after the pump
has been fully primed and vented, it should be
unnecessary to re-vent the pump.
5.5.2 Pump fitted with a mechanical seal
A mechanical seal ensures a seal without leakage
and does not need any adjustment. Nevertheless if
a light leakage occurs during start-up, it should
disappear after the initial running in of the rubbing
faces.
NEVER RUN A MECHANICAL
SEAL DRY, EVEN FOR A SHORT WHILE.
SAFETY INSTRUCTIONS WHEN THE PUMP IS
RUNNING:
If hot or freezing components of the machine
can present a danger to operators, they must be
shielded to avoid accidental contact. If a 100 %
protection is not possible; the machine access
must be confined to the maintenance staff only.
If the temperature is greater than 80 °C (176
°F), a warning plate must be clearly placed on the
pump.
It is strictly forbidden to open switch
cupboards, switch boxes, or all other live electric
equipment. If it is necessary to open them in order
to take readings, to carry out tests or adjustments
for example, only a skilled technician may do them
with adapted tools. Make sure that physical
protection against electrical risks is used.