Electrical Connection; Operation - Walrus Systemflo SLB-C Series Installation And Operation Manual

SLB-C, SLB-S, SLB-N

6. Electrical Connection

¾ All electrical connections should be in accordance with the local regulations and carried out by a qualified electrician.
¾ Make sure that the supply voltages, frequencies, and phase are suitable for the motor specifications.
¾ Before proceeding, make sure that all the connections are grounded and well insulated.
¾ Overload protection should be provided.
¾ Wiring information is shown on the inside of the terminal box cover.
¾ The terminal box can be turned to four positions.
¾ Check the direction of rotation is consistent with the direction marked on the fan cover (three-phase motor only).
¾ Make sure that the controls are properly grounded.
¾ We strongly recommend installing dry running protection.
7. Start-up
The pump and suction pipe should be filled with liquid before start-up to prevent dry running.
Dry running can damage the pump bearing and shaft seal.

7.1 Operation

¾ Start the pump and check the direction of rotation of the motor (three-phase motors).
¾ Start the pump while the on-off valve of the discharge is closed. Right after start-up, open the on-off valve slowly. The pump
should be running smoothly and quietly. Otherwise, it may be necessary to re-prime the pump.
¾ Check the current draw of the power. If necessary, adjust the setting of the thermal relay.
¾ Air pockets trapped inside the pump may be released by adjusting the air screw.
If the pump is installed in a location that may be exposed to freezing when not in operation, the pump and the pipe system
must be drained to prevent freezing damage.