Priming; Operation - Pentair DHR Series Instruction Manual

EN
A - If the direction of rotation complies with the direction of the rotation indicated by the arrows shown on the machine head, the
connections are correct
B - If the direction of rotation is opposed to the one shown by the arrows present on the machine head, perform the following
operations:
MACHINES WITH SINGLE-PHASE MOTORS
To connect the machine to the mains, perform the operations described here below:
•
Make sure that the motor is suitable to
the mains voltage and frequency
•
Cut the electric system off by using a
cut-off switch
•
Loosen the screws that fix the cover to
the terminal block
•
Insert the supply cable into the cable
holder
A - If the direction of rotation complies with the direction of the rotation indicated by the arrows shown on the machine head, the
connections are correct
B - If the direction of rotation is opposed to the one shown by the arrows present on the machine head, perform the following
operations:
•
Cut the electric system off by using the
cut-off switch
•
Loosen the screws that fix the terminal
block cover in position
CHAPTER

OPERATION

WARNING
Always start the machine after filling it with fluid, as explained under sections "Operation" and "Priming".
Before using the pump, read Application chapter for a proper use.

4.1 PRIMING

NOTE
A machine is considered below the water level if the level of the fluid to pump is above the suction mouth of the machine,
both with closed or open loop systems.
28
•
Cut the electric system off by using the
cut-off switch
•
Loosen the screws that fix the terminal
block cover in position
•
Invert the connection of the two
phases
•
Reposition the terminal block cover
with the related gasket
•
Tighten the screws of the terminal
block cover
•
Connect the lines to the grounding
system
•
Reposition the cover of the terminal
block with the related gasket
•
Tighten the screws that fix the cover to
the terminal block
•
Use a bolt to temporarily short-circuit
the ends of the condenser
•
Change the position of the bridges
•
Insert the electric supply by using the
cut-off switch
•
Supply one current impulse to the
machine
•
Check the direction of rotation of the
motor
•
Remove the bolt
•
Reposition the terminal block cover
with the related gasket
•
Tighten the screws of the terminal
block cover