Carrier 38QUA009DS, Service Manual, Page: 20 / 116

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2.3.4.5. Communication wire connection

A6 duct uses two wires without polarity connection way, which almost has no mistake during the
installation.
2.3.4.6.
Easy Clean

With a larger window design, once the motor and the blower wheels have been detached, heat
exchanger and water receiver tray in behind can be seen very clearly. Dust can be easily removed
from the inside by vacuum
2.3.4.7.Fresh air intake function(Optional)

Install one duct from the reserved fresh-air intake to outdoor.
Continually inhale the fresh air to improve the quality of the indoor air, fulfills air quality more
healthy and comfortable.
Air intake from rear (Standard)
Air intake from bottom (Optional)