GEA HA22P/125-4 Assembly Instructions Manual

Contents

16DGBFEIRu09636-12.2014-DGbFEIRu5| Electrical connectionPTC1 PTC2Terminal boxFig. 19ATTENTION!Terminals 1 - 6 on the triggerunit MP 10 and terminals PTC1 and PTC 2 on the compres-sor terminal board must notcome into contact with mainsvoltage. This would destroy thetrigger unit and PTC sensors.The supply voltage at L1-N(+/- for DC 24 V version) mustbe identical to the voltage atterminals 11, 12, 14 and 43.5.5 Electronic trigger unit MP 10The compressor motor is fitted with cold conductor temperature sensors (PTC) connected to theelectronic 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, theunit 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 thermalprotection 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 remedythe cause.5.6 Connection of the trigger unit MP10INFO! 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 triggerunit as the first element in the control power circuit.Temperature monitoring connections:Motor winding: Terminals 1 - 2Thermal protection thermostat: Terminals 3 - 4Restart prevention: Terminals 5 - 6INFO! The unit has a restart prevention device. After you have rectified thefault, interrupt the mains voltage. This unlocks the restart preventiondevice and the LEDs H1 and H2 go out.5.4 Start unloaderTo avoid current peaks during the starting phase we recommend using the GEA Bock-ESS softstarting device (Electronic Soft Start). Refer to "Accessories" for further information.