SPP Pumps Unistream - Manual (Page 8)

Manual No/Rev
W21-002E / 10
Operators Instructions for
Unistream Centrifugal Pumps
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 8 of 24
If the stuffing box is supplied with cooling
water or the mechanical seal is supplied with
clean water flush, check that the water
supply is turned on.
Failure to supply the
stuffing box or mechanical
seal with cooling or flush water may result in
damage and premature failure of the pump.
Check that the rotating assembly is free to
rotate by hand before connecting the power
supply. Also check that the piping system
has been properly connected with all joints
tightened and instrumentation is in position.
Check that the pump is
primed. Pumps should
never be run dry as the pumped liquid acts
as a lubricant for the close running fits
surrounding the impeller and damage will be
incurred.
Prime the pump using an ejector, exhauster
or vacuum pump. If a foot valve is used in
the suction line the pump may be primed by
venting and filling the casing with liquid.
Connect the electrical supply to the pump
unit. Momentarily switch on motor and check
direction of rotation. This should be such that
the pump assembly turns clockwise when
viewed on the driven end. For three phase
electric motors, if direction of rotation is
incorrect, disconnect the supply and change
over two of three supply wires.
After the first 200 hours running from new,
change the bearing lubricating oil. Refer to
Section 6.4 - Bearing Lubrication.
5.1 Starting Procedure
BEFORE A UNISTREAM PUMP IS STARTED
ALWAYS ENSURE THAT THE SUMP IS FILLED
TO THE CORRECT LEVEL WITH LIQUID, AND
THAT
ANY LEVEL CONTROLS ARE
FUNCTIONING CORRECTLY.
Abrasion and Entrapment Hazard
Do NOT touch any moving or
rotating parts. Guards are provided
to prevent access to these parts, where they
have been removed for maintenance they
MUST be replaced before operating the
equipment.
Before starting, check the level of oil in the
bearing housing is at the level mark on the
sight glass on the side of the bearing
housing. Refer to Section 6.4 - Bearing
Lubrication.
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, bearings
or gland packing are 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.
5.2 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
ATTENTION
ATTENTION