Diaphragm pump N680 EX
Servicing
Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
39
5. Turn the four nuts (
1
) on the stud bolts (
8
) and tighten them crosswise
(tightening torque: 11 Nm).
Inspecting pumps
1. Mark the motor fan cover (
9
) with a continuous line made with a felt-tip
pen.
2. Loosen the fastening screws (
10
) of the motor fan cover (
9
) and remove
the motor fan cover (
9
).
3. Check the pump for smooth running by turning the fan.
4. Refit the motor fan cover (
9
) according to the marking.
5. Hand-tighten the fastening screws (
10
) again.
When fitting the motor fan cover, make sure that all of the screws are
fitted again, the fan cover and the fan are undamaged, and the fan can
rotate freely. To do this, perform a function test.
6. Function test
Perform a function test in an non-explosive atmosphere.
– Connect the suction and pressure sides to the pump.
– Electrically connect the pump.
– Test the functionality of the pump.
– Disconnect the pump electrically and pneumatically again.
7. Pump integrated in application
– Connect the suction and pressure sides to the pump.
– Electrically connect the pump.
– Test the functionality of the pump.
