SPP Pumps Eurostream - Manual (Page 7)

Operators Instructions for
Eurostream Centrifugal Pumps
Manual No/Rev
W22-001E / 9
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 7 of 20
Check that the suction valve is open and
that the pump is primed.
Open the discharge valve to one quarter
open to prevent hydraulic lock from
occurring. Switch on the motor and allow it
to build up to full operating speed. Slowly
open discharge valve until the pump
reaches the required duty condition.
Check that the motor is not overloading, unit
is not vibrating or excessively noisy, the
motor is not overheating, and that the pump
is developing the correct flow and head
requirements.
If the pump is operating at its normal speed,
the pump should be shut down at once if
any of the following defects are found:
a) No liquid delivered.
b) Not enough liquid delivered.
c) Not enough pressure.
d) Loss of liquid after starting.
e) Vibration.
f) Motor runs hot.
g) Excessive noise from cavitation.
h) Pump overheating.
Recommended corrective action for these
faults is given in Section 7 Faults and
Remedial Action.
5.3 During Operation
Hot Surfaces Hazard
Do NOT touch surfaces that during
normal running will be sufficiently hot
to cause injury. These are marked with the
HOT warning symbol. Note that these
surfaces will remain hot after the pump
has stopped; allow sufficient time for
cooling before maintenance. Be cautious
and note that other parts of the pump may
become hot if a fault is developing.
Cold Conditions Hazard
Do NOT operate water pumps in
temperatures below freezing point,
without first checking that the
pumped fluid is not frozen and the
pump is free to turn. Pumps in these
environments should be drained down
during inactivity and re-primed before
starting.
Hazardous Noise
In addition to local or site regulations
for noise protection, SPP Pumps Ltd.
recommend the use of Personal Ear
Protection equipment in all enclosed pump
rooms and particularly those containing
diesel engines. Care must be taken to
ensure that any audible alarm or warning
signal can still be heard with ear defenders
worn.
Periodic Checks:
a)
Motor Bearings:
Check the bearing temperatures do not
exceed 70°C as an increase may indicate
the early stages of bearing trouble.
b)
Noise:
Listen for any unusual noise or an increase
in normal sound level.
This may result from:
i) Loose fasteners for guards and other
equipment.
ii) Air trapped in the pump i.e. the pump was
not fully primed.
iii) Cavitation caused by air in the liquid from
leaks in the suction pipework.
iv) Small solids in the liquid.
NOTE - At certain installations or at certain
operation points on the pump curve, the
noise level 70dB (or the actual pump
specified noise level) can be exceeded.
c) Suction Gauge Reading:
If this is higher than normal, investigate and
check that valves in the suction pipework are
fully open or that the suction lift may have
increased.
d)
Discharge Gauge Reading:
If this is lower than normal, check for a leak
in the associated pipework or that a valve in
the delivery line has been opened when
normally it is partially closed.
5.4 Stopping Procedure
Stop the motor then fully close the discharge
valve.
6. Maintenance and Service
6.1 General Introduction
SPP Pumps Eurostream pumps will provide
many years of trouble free service when
maintained in accordance with these
instructions. In the event of failure of the
pump it is recommended that SPP Pumps
Ltd. Service Department be called to
investigate and carry out repairs. The
following instructions are given to cover the
main elements of strip and rebuild but do
NOT include instructions for work that MUST
be done by an SPP Pumps Ltd. Service
Engineer.