SPP Pumps Instream - Manual (Page 7)

Operators Instructions for
Instream Centrifugal Pumps
Manual No/Rev
W23-001E / 8
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 7 of 16
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.
Hazardous Gases, Mists, Sprays
and Leaks
Be aware of the hazards relating to
the pumped fluid, especially the danger from
inhalation of noxious and toxic gases, skin and
eye contact or penetration. Obtain and
understand
the hazardous substance
(COSHH) data sheets relating to the pumped
fluid and note the recommended emergency
and first aid procedures.
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 Ltd Instream 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.