18-GF75D1-1C-EN
17
Coil Conversion Instructions
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IImmppoorrttaanntt:: Restrictions apply to Downflow
applications.
1. For 3, 3.5 and 4 ton downflow
applications, airflow must not exceed
1600 cfm due to condensate blowoff.
2. For 5 ton downflow applications,
airflow must not exceed 1800 cfm.
Follow the conversion steps when installing the air
handler in downflow configuration.
1. Remove the front panels panel from the air handler.
The coil and line set panel do not need to be
separated.
2. Remove the fasteners on both sides of the coil.
3. Remove the two screws holding the center
horizontal bracket and rotate out of place. Retain
parts.
4. Slide the coil assembly out. Remove and discard
the horizontal drain pan.
5. On both sides of the cabinet, remove the screws
that hold the coil support brackets and retain for
later use. Seal the holes to prevent air leakage.
6. Rotate and lift the two coil support brackets to
remove from front slots in cabinet.
Figure 3. All models
Figure 4. All models
7. Rotate the unit into the downflow orientation.
8. Pre-drill two clearance holes in the cabinet at
dimples located below the location the screws were
removed for the coil support brackets. There is one
hole per side. See location of holes.
9. Replace the center horizontal bracket removed in
Step 3. Use the screws retained from Step 3 to
attach.
10. Place coil support brackets into the lower set of
slots and rotate into place. Push downward to lock
into place.
11. Secure each bracket with a screw that were
previously removed.
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