GEA Bock HG4 R134a - Manual (Page 16)

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5| Electrical connection
400 V
Direktstart YY Teilwicklungsstart Y/YY
1V1 1W1 1U1
2W1 2V1 2U1
L3 L2 L1 L3 L2 L1
L3 L2 L1
1V1 1W1 1U1
2W1 2V1 2U1
Direct start YY Part winding start Y/YY
ATTENTION! Failure to do this results in opposed rotary fields and results in
damage to the motor. After the motor starts up via partial winding
1, partial winding 2 must be switched on after a maximum delay of
one second. Failure to comply can adversely affect the service life
of the motor.
The motor is wired for direct start (YY) at the factory. For part winding start Y / YY, the bridges must be
removed and the motor feed line connected according to the circuit diagram: