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09790-02.2018-DGbFEIRu

5| Electrical connection

Temperature monitoring connections:

Motor winding: Terminals 1 - 2

Thermal protection thermostat: Terminals 3 - 4

Restart prevention: Terminals 5 - 6

5.6 Electronic trigger unit MP10

Thecompressormotoristtedwithcoldconductortemperaturesensors(PTC)connectedtotheelec-

tronic trigger unit MP10 in the terminal box. Readiness to operate is signalled by the H3 LED (green)

after the power supply is applied. In the case of excess temperature in the motor winding, the unit

switches off the compressor and the H1 LED lights red.

The hot gas side of the compressor can also be protected against overtemperature using a thermal

protection thermostat (accessory). The H2 LED (red) is provided for the protection function.

The unit trips when an overload or inadmissible operating conditions occur. Find and remedy

the cause.

5.7 Connection of the trigger unit MP10

PTC1

PTC2

Terminal box

Fig. 22

ATTENTION

Terminals 1 - 6 on the trigger

unit MP10 and terminals PTC 1

and PTC 2 on the compressor

terminal board must not come

into contact with mains voltage.

This would destroy the trigger

unit and PTC sensors.

The supply voltage at L1-N

(+/- for DC 24 V version) must

be identical to the voltage at

terminals 11, 12, 14 and 43.

INFO Connect the trigger unit MP10 in accordance with the circuit dia-

gram. Protect the trigger unit with a delayed-action fuse (F) of max.

4 A. In order to guarantee the protection function, install the trigger

unitastherstelementinthecontrolpowercircuit.

INFO

Theunithasarestartpreventiondevice.Afteryouhaverectiedthe

fault, interrupt the mains voltage. This unlocks the restart prevention

device and the LEDs H1 and H2 go out.

GEA Bock HG8 Series User Manual

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