GEA Bock HG66e Series, Assembly Instructions Manual

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GB
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Designation on the name plate Sticker on the terminal box
Y/YY
Y/YY
7.2 Standard motor, design for direct or partial winding start
INFO
A mechanical unloaded start with bypass solenoid valve is
not required.
7 | Electrical connection
Compressors with this marking are suitable for direct or partial winding start. The motor winding is
subdivided into two parts:
Part winding 1 = 50 % and part winding 2 = 50 %.
This winding division reduces the start-up current needed for a part winding start to approx. 50 % of
that for a direct start.
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:
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.
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