Installation and operating instructions Wilo
–
SCPV pumps
19
8.3 Starting the pump
8.3.1 Direction of rotation
Disconnect the drive coupling and run the motor to
check it's direction of rotation. A directional arrow
is provided on the pump unit.
8.3.2 Pre-starting checks
Ensure that sufficient fluid is available at the
pump suction for satisfactory operation of the
pump. Minimum water level as specified in
General Arrangement Drawing/Technical Data
Sheet must be available during start up and entire
operation of the pump. Efficient operation of the
pump depends upon the running clearance, which
are lubricated by pumped liquid. Any attempt to
run the pumps dry or partially full will result in
seizure of internal rotating components.
Check that the inlet isolating valve is open and
that the delivery valve is closed.
Ensure that bearings have been filled with proper
grade of lubricant .
Check that there is no blockage in the strainer at the
end of the suction line.
Check for free rotation of the unit when coupled.
Check that suction and delivery pressure gauges are
connected. Test and make available any alarm,
signals, interlock systems and any of the protective
devices incorporated in the auxiliary and main
pumping control system.
Check that all electrical checks on motor, relay
setting in panel etc have been carried out in
accordance with the instructions of motor
manufacturer.
Ensure that mechanical seal connection is provided
as shown in GA Drg.
Per-Start Check ups
1
Alignment with and without piping
Activity
Checked on
Remark
2
Flushing of pipe lines and ensures no leakages
3
Availability of sufficient liquid in sump/suction as per specifications
4
Installation of all instruments
•
Suction and delivery pressure gauges
•
Pressure switches
•
Temperature gauges
•
Any other as supplied/specified
5
Operation of suction, delivery and inline valves
6
Proper supports for piping and other allied equipments
7
Availability of flushing/sealing liquid for stuffing box
8
Availability of sufficient cooling liquid for bearings as specified
9
Free rotation of pump and drive shafts
10 Lubrication of bearings
11 Checking of insulation resistance of motor
12 Proper cable termination
13 Motor protection relay settings
14 Motor protection relay settings
15 No load trial operation of drive
•
Direction of rotation is ok
•
Noise and vibration within limits
•
Bearing temperatures and winding
temperatures are within limits
•
Overall operation is satisfactory
Coupling of pump and drive and free rotation of
16 shafts in coupled condition
17 Suction valve is fully opened
18 Pump is fully primed and all air is vented
19 Delivery valve is closed (if required)
20 Emergency shutdown is possible
