Exhaust Fan Removal - Carrier 48HC 04-28 Controls, Start-Up, Operation And Troubleshooting

EXHAUST FAN REMOVAL

1. Turn off, lockout and tag-out electrical power to unit.
2. Remove the exhaust fan access panel by removing the
self-sealing screws around the perimeter (see Fig. 57).
NOTE: Even after all of the screws have been removed from the
panel it still may be difficult to remove due to the gasket applied
from the original installation. Take care not to damage the gasket.
If damage occurs use 9430-2300 gasket to replace before reattach-
ing the panel.
3. Open the door to the EnergyX unit in order to gain access
to the exhaust fan front panel.
NOTE: See instructions for removing the wheel and exhaust fil-
ters if more room is needed to access the exhaust fan front panel.
Fig. 57 — Outside Air Fan Removal
4.
5.
6.
7.
8.
99
If installed, remove the exhaust motorized damper.
Remove the fasteners around the perimeter of the exhaust
fan that secure the exhaust fan front panel to the dividing
wall by access through the door of the unit. See Fig. 58.
Disconnect connectors PL120 and PL122 as well as the
power wires for the e xhaust fan motor from the wiring
harness inside the air chamber of the EnergyX unit.
Remove the exhaust fan by moving it back and then out
the side of the unit through the exhaust motorized damper
access panel. See Fig. 59.
Repeat steps 5, 6, and 7 to remove the second exhaust fan
on size 20, 24, and 28 models.