Installation and connection
Diaphragm Vacuum Pump N 828 / N 838
26
Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19
Pumps with brushless DC motor
1. Compare the supply data with the data on the motor plate. For
maximum operating curren
t of the pump see pump’s type
plate.
The voltage must not vary by more than + 10% and - 10% from
that shown on the type plate.
2. Electrical connect of the pump according to Tab. 12, page 27
(N 8__ K_DC-B) and Tab. 13, page 28 (N 8__ K_.29DC-B).
Note the proper polarity (see marking on the motor). Incorrect
lead connection will damage electronics of brushless DC mo-
tors (type designation ending with B). The supply wires have
inverse-polarity protection in the motor board for this purpose,
while the control-voltage wires do not have this protection func-
tion.
Control voltage may only be applied if the motor controller is
supplied with operating voltage. Otherwise damages can occur
on the motor controller.