Lennox ROOFTOP FLEXY FXK 55, Installation, Operating And Maintenance Manual

Page: 42 / 106

COMMISSIONING
FLEXYII_WSHP-IOM-1307-E - 40 -
STARTING THE UNIT
At this point the unit circuit breakers should be open
You will need a
DS60 maintenance controller.
Connecting the CLIMATIC displays (RJ12 connector on the
main board) :
Close the 24V Control Circuit breakers.
The CLIMATIC 60 starts after 30s
Reset the DAD photo (If fitted)
Check and adjust the control settings.
Refer to the control section in this manual to adjust the
different parameters.
POWERING THE UNIT
- Power up the unit by closing the isolator switch. - At this
point the blower should start unless the climatic does not
energise the contactor. In this particular case the blower
can be forced by bridging the port NO11 and C4 on
connector J15 on the Climatic. 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.
NOTE: A compressor rotating in the wrong direction will fail.
- If the fan turns in the wrong direction (the right direction is
shown on figure n° 11), 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, remove
the bridge on connector J15 if fitted.
- If now only one of the components rotates in the wrong
direction, disconnect the power supply at the machine's
isolator switch (if fitted) 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 specified limits,
this usually indicates excessive air flow which will affect the
life expectancy and the thermodynamic performances of the
unit. This will also increase the risks of water ingress into
the unit. Refer to the "Air Flow Balancing" section to correct
the problem.
At this point attach the manometers to the refrigerant circuit
Fig. 11