Carrier 38QUA009DS, Service Manual, Page: 12 / 116

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2.3 Features
2.3.1 A5 Duct Units
2.3.1.1 Easy Installation: Two air Inlet Styles (Bottom side or Rear side)

Air inlet from rear is standard for all capacity; air inlet from bottom is optional.
 The size of air inlet frame from rear and bottom is same, it’s very easy to move the cover from
bottom to rear side, or from rear to the bottom, in order to matching the installation condition.
2.3.1.2 Fresh Air Intake Function

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.
2.3.1.3 Easy Maintenance

Clean the filter (Optional, standard product without filter)
It is easy to draw out the filter from the indoor unit for cleaning, even the filter is installed in rear
side or bottom side.

Replace the motor or centrifugal fan
Remove the ventilated panel firstly. Remove a half of blower housing and take out the motor with
centrifugal fan. Directly remove two bolts, and then replace the motor or centrifugal fan easily.
Air intake from rear (Standard) Air intake from bottom (Optional)