Pfeiffer Vacuum UNO - Connecting to the Mains Power Supply

6
3.5. Connecting To The Mains Power Supply
Power connections must comply with local
regulations. Voltage and frequency information
given on the rating plate must correspond to
the mains voltage and frequency values.
When the electrical connections have been
completed, carry out the earthed conductor
test.
The pump must be disconnected from the power before
opening the terminal box.
When switching on for the first time, check the direction of
rotation:
Checking The Direction Of Rotation
Check the direction of rotation of the pump
before filling up with operating medium.
➡ Remove blank flange on the exhaust flange,
– do not take off sieve strainer from vacuum flange 1 and
exhaust flange 2.
➡ Switch on pump for a short time (max. 3 seconds).
Motor/motor fan must turn clockwise (see arrow P on
motor fan cover).
➡ If direction of rotation is incorrect: Interchange two
phases on the connecting cable.
CAUTION
WARNING
Power section with motor to be protected
Checking The Direction Of Rotation
P
Three phase motors with PTC
Pumps fitted with these motors are used primarily in systems
or in closed rooms. The motors of these pumps are fitted with
three PTCs which are built into the stator windings. The
connection of a tripping unit will protect the pump against
overloading (see connection example).
Tripping unit:
PTC tripping unit with two switchover contacts at the output
manufactured by Ziehl, type MSR 220 F (see Section 9,
„Accessories“), AEG type TMA 4R or Siemens type 3 UN8 004.