Wilo SCP Série Notice De Montage Et De Mise En Service page 61

8.3.2 Pre-starting checks
• Check that the inlet isolating valve is open and
that the delivery valve is closed.
• 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 protec-
Pre-start Check up
1 Alignment with and without piping
2 Flushing of pipe lines and ensure no leakages
3 Availability of sufficient liquid in sump/suction as per specifica-
tions
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 Avaliability of flushing/sealing liquid for stuffing box
8 Availability of sufficient cooling liqzid 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 Check all interlocks as specified/provided
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
16 Coupling of pump and drive and free rotation of 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
8.3.3 Normal starting and running checks
• When all the foregoing pre-start checks are satis-
factory, start the pump and check the direction of
rotation (indicated by a direction arrow on the
pump casing) otherwise stop the pump immedia-
tely for correction of direction of rotation. Then
run the pump at its rated speed.
• Check the ammeter reading to ensure that the
motor is not being overloaded.
Installation and operating instructions Wilo-SCP
Activities
tive devices incorporated in the auxiliary and main
pumping control system.
• Ensure that all electrical checks on motor, relay
setting in panel etc have been carried out in
accordance with the instructions of motor manu-
facturer.
• Ensure that stuffing box sealing water seal
connection is provided as shown in GA Drawing.
Checked on
• If applicable, ensure that the stuffing box is not
overheating and that there is slight leakage from
the gland (about 1 drop per second). There may be
at first a tendency for the stuffing boxes to run
warm because of the high viscosity lubricant in
the packing. During the first few minutes of run-
ning with new packing, a small quantity of very
viscous fluid will be extruded, but the flow should
reduce when the packing has settled down.
English
Remarks
61