en – Original Instructions
26
SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
5.2
Initial start-up
5.2.1
Surface unit
1.
Shut the on-off valve located on the discharge line.
2.
Open the on-off valve on the suction line, if present.
3.
Using the filling plug, fill the suction lift unit, or vent the positive suction head unit.
4.
Start the unit by connecting the plug to the power supply and/or turning on the switch.
5.
Slowly fully open the on-off valve on the discharge side.
6.
With the unit in operation, check that:
•
No liquid is leaking from the unit or piping system
•
There is no unwanted noise or vibrations
•
The electric consumption is within the rating plate limits
•
The unit offers the expected hydraulic performance levels.
7.
Note down the pressure value at zero flow rate.
5.2.2
Submerged unit
1.
Shut the on-off valve located on the discharge line.
2.
Vent the unit using the fill plug.
3.
Start the unit by connecting the plug to the power supply and/or turning on the switch. If
the unit has a float switch, it may start or not depending on its position.
4.
With the unit in operation, slowly fully open the discharge on-off valve.
5.
With the unit in operation, check that:
•
No liquid is leaking from the unit or piping system
•
There is no unwanted noise or vibrations
•
The absence of vortexes nearby the suction port
•
The float switch, if installed, moves without obstacles
•
The electric consumption is within the rating plate limits
•
The unit offers the expected hydraulic performance levels.
6.
Note down the pressure value at zero flow rate.
5.3
Rotation sense check (three-phase motors)
1.
Shut the on-off valve located on the discharge line.
2.
Start the unit.
3.
Check the pressure gauge: if no pressure or low pressure is detected, the rotation direction
is wrong.
4.
Stop the unit.
5.3.1
Wrong rotation direction
1.
Disconnect the power supply.
2.
Invert two of the three wires of the power supply cord, on the electric panel side.
5.4
Stopping
1.
Shut the on-off valve located on the discharge line.
2.
Stop the unit by disconnecting the plug from the power supply and/or turning off the
switch. If a float switch is installed, the unit stops automatically when the same reaches the
low position (minimum liquid level).
3.
Slowly open the on-off valve again and check that no liquid is returning to the tank/basin
through the unit.
