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09706-09.2013-DGbFEI

5| Electrical connection

Terminal box

Fig. 20

Temperature monitoring connections:

Motor winding: Terminals 1 - 2

Thermal protection thermostat: Terminals 3 - 4

Restart prevention: Terminals 5 - 6

ATTENTION!

Terminals 1 - 6 on the trigger

unit MP 10 and terminals PTC

1 and PTC 2 on the compres-

sor 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.

5.4 Electronic trigger unit MP 10

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

electronic trigger unit MP 10 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.

5.5 Connection of the trigger unit MP 10

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 HG7 Series User Manual

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