Flowserve LR Worthington - Manual (Page 20)

LR, LRV, LLR and LR-S USER INSTRUCTIONS ENGLISH 71569088 08-10
Page 20 of 48 flowserve.com
5.3 Direction of rotation
Ensure the pump is given the same
rotation as the pump direction arrow cast on the
pump casing.
To avoid dry running the pump must either be filled
with liquid or have the flexible coupling disconnected
before driver is switched on.
If maintenance work has been carried
out to the site's electricity supply, the direction of
rotation should be re-checked as above in case the
supply phasing has been altered.
5.4 Guarding
Guarding is supplied fitted to the pump set.
In member countries of the EU and EFTA, it is a legal
requirement that fasteners for guards must remain
captive in the guard to comply with the Machinery
Directive 2006/42/EC. When releasing such guards,
the fasteners must be unscrewed in an appropriate
way to ensure that the fasteners remain captive.
Whenever guarding is removed or disturbed ensure
that all the protective guards are securely refitted
prior to start-up.
5.5 Priming and auxiliary supplies
Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.
Ensure the inlet pipe and pump casing
are completely full of liquid before starting continuous
duty operation.
5.5.1 Suction pressure above atmospheric
pressure
Horizontal pumps: open vent connection (1) on top of
the pump upper casing to allow the trapped air to
escape. Let liquid run out until free from air bubbles.
Vertical pumps: open vent connection (1) at the front
of the upper half casing and disconnect the seal flush
line at the mechanical seal/stuffing box to allow the
trapped air to escape. Let liquid run out until free
from air bubbles.
5.5.2 Suction lift with foot valve fitted
Fill suction pipe and casing with liquid at a pressure
of 1 to 2 bar from an external source. Vent as
described in section 5.5.1.
5.5.3 Suction lift without foot valve
Pump casing vents on the suction volute must be
connected to an external vacuum pump priming
system. If in doubt please consult Flowserve.
5.6 Starting the pump
a) Ensure flushing and/or cooling/
heating liquid supplies are turned ON before
starting the pump.
b) CLOSE the outlet valve.
c) OPEN all inlet valves.
d) Prime the pump.
e) Ensure all vent connections are closed
before starting.
f) Start motor and check outlet pressure.
g) If the pressure is satisfactory, SLOWLY open
outlet control valve.
h) Do not run the pump with the
outlet valve closed for a period longer than 30
seconds.
i) If NO pressure, or LOW pressure, STOP the
pump. Refer to section 7, Faults; causes and
remedies, for fault diagnosis.
Possible
priming
points To vacuum
pump
(1) Possible
priming
points