14
Pump NB/FB/WP/SM/F
Version: 27216 - E
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
Time Relay Setting
For three-phase motors with star-delta connection, you must ensure that the switching
points between star and delta follow one after the other in as little time as possible. Longer
switching times will result in damage to the motor. Time delay setting for star-delta
connection: < 3 sec.
Direction of Rotation Check
The direction of rotation of the motor must match the direction indicated by the direction of
rotation arrow on the hood of the pump. Check by switching on and off briefly.
If the direction of rotation is incorrect, reverse any two phases L1, L2 or L3 of the mains
power supply line in the motor terminal box.
Auxiliary Equipment for Motor
If special control devices are provided, for example in conjunction with use of the pump in
a technical system, the manufacturer's instructions for these control devices must always
be observed.
3
Pump Operation
3.1
Initial Commissioning
Make certain the following preconditions are met before initial commissioning of the pump:
•
The pump is connected electrically with all protective devices in accordance with
requirements.
•
The pump is filled with pumping medium and is receiving supply.
•
All shut-off elements are open on the suction end and the suction line is vented.
•
Make certain:
Dry running results in increased wear and must always be avoided!
•
Rotating parts of the pump must be provided with a contact safety device (in
accordance with German accident prevention requirements (UVV) the pump may only
be operated with a contact safety device).
•
The pump shaft has been tested to ensure it moves easily
•
The direction of motion has been checked.
3.1.1
Starting the Pump
The pump must only be turned on with the pressure-end shut-off element half open! Do not
open it until full speed is reached. Then slowly open it and adjust control to the operating
point.