Commissioning - Carrier 42AM ATEX serie Installations-, Betriebs- Und Wartungsanleitung

5 - COMMISSIONING

Mechanical check
Before switching on the unit:
- Check that the impeller rotates freely by spinning it manually. It must not under any circumstances rub against the casing.
- Check the tightness of the screws mounting the 42AM on its support.
- Check the general cleanliness of the unit.
Electrical check
Before switching on the unit:
- Check the calibration of the electrical protection devices
- Check that the network voltage matches that indicated on the motor's data plate.
- Check that the cross section of the power supply cables is compatible with the power indicated on the motor's data plate
- Check that the cross section of the power supply cables is compatible with the cross section of the cable gland
- Check the unit's electrical connection (Phase + Earth) and heat protection.
- Check that the terminal box is properly closed.
After switching on the unit
- Check the unit's direction of rotation in accordance with the diagram below..
- Check the current absorbed by the motor and compare it with that indicated on its data plate (see below):
• If this is equal to or less than the current indicated on the unit's data plate, the installation is in good working order.
• If it is greater than the current indicated on the data plate, stop the motor immediately and check the installation and the connections.
If the motor appears to be the source of the fault, contact CARRIER.
• Check the motor rotation speed. If a variable speed control is installed, this must stay within the range of 40 % -100 % of the
motor's rated speed, at all times.
Correct direction of rotation Incorrect direction of rotation
Reverse 2 of the 3 phases
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