Flowserve MENBLOC 60Hz - Manual (Page 23)

MENBLOC 60Hz USER INSTRUCTIONS ENGLISH 71559945 - 02/13
Page 23 of 36 flowserve.com
Ensure the inlet pipe and pump
casing are completely full of liquid before starting
continuous duty operation.
These operations must be carried out by personnel
with approved qualifications.
5.3.1 Priming of a pump with flood suction
a) With the discharge valve closed, fill the pump
by opening the suction valve. Let air escape
by removing the plug located on the pump
casing.
b) When the discharge pipe is full and if there is a
by-pass valve on the check valve, open
slightly the discharge valve and the by-pass of
the check valve.
c) When the pump is totally free of air bubbles,
replace the plugs.
Air escape
Priming of a flooded pump
5.3.2 Priming of a pump on suction lift
* With foot valve:
a) Fill suction pipe and casing with liquid from an
independent source (pressure 1 to 2 bars or
15 to 30 psi).
a) Let air escape by removing the plugs located
on the pump.
b) When the pump is totally free of air bubbles,
replace the plugs.
E x te r n a l s o u r c e
A ir e s c a p e
P r i m in g o f s u m p s u c ti o n p u m p w ith fo o t v a l v e
Priming of sump suction pump with foot valve
*Without foot valve:
Priming may be accomplished by means of venting
system.
Foot valves are not recommended when
the pumped liquid has suspended solid particles.
They may lodge between foot valve seat and disc.
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.