Lennox BAC 024 SNM 3M, Installation, Operating And Maintenance Manual

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BALTIC-IOM-0412-E / Service manual
COMMISSIONING
WARNING: commissioning must only be carried out by trained refrigeration engineers whom qualifi cation
certifi cates are compliant with the local regulation
WARNING: ensure that the power supply includes 3 phases with no neutral
WARNING: check the wire connection tightness
WARNING: a compressor rotating in the wrong direction will fail shortly.
Before turning on the power
Wire connection tightness checks
CLIMATIC™ confi guration
See CLIMATIC™ section
Powering the unit
Power up the unit by closing the isolator switch (if fi tted).
At this point the blower should start unless the CLIMATIC™ does not energise the contactor. Once the fan is running, check the rotation
direction. Refer to the rotation arrow located on the fan.
The fans and compressors direction of rotation is checked during the end of line test. They should therefore all turn in either the right
or wrong direction.
Ensure that the power supply between the building and the unit meets local authority standards and that the cable speci fi cation satis fi es
the start-up and operating conditions displayed on the name plate.
Check the following wire connections for tightness:
• Main switch connections,
• Mains wires linked to the contactors and circuit breakers
• Cables in the 24V control supply circuit.
If the fan turns in the wrong direction (the right direction is shown below), disconnect the
main power supply to the machine at the building's mains switch, reverse two phases
and repeat the above procedure.
Close all circuit breakers and power up the unit.
If now only one of the components rotates in the wrong direction, disconnect the power
supply at the machine's isolator switch (if
fi tted) and reverse two of the component’s
phases on the terminal within the electrical panel.
Check the current drawn against the rated values, in particular on the supply fan.
If the readings on the fan are outside the speci
fi ed limits, this usually indicates excessive
air fl ow which will affect the life expectancy. In this case reduce rpm using eDrive™.