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Installation - Mechanical
Field Conversions
Fan Discharge Conversion for Indoor Air
Handlers
Performance UCCA air handlers are available in the following
arrangements:
•
Horizontal direct-drive fan with top front discharge
•
Horizontal FC fan with top front discharge
•
Horizontal FC fan with front top discharge
•
Vertical FC van with front top discharge
•
Vertical FC fan with back top discharge
•
Vertical FC fan with top back discharge
•
Vertical FC fan with top front discharge
•
Vertical MI fan with front top discharge
•
Vertical MI fan with top front discharge
•
Vertical MI fan with back top discharge
Field conversions from one configuration to another can be
made for sizes 8 through 21 by modifying certain parts of the
cabinet and by rotating the fan. Also, if changing from a front
or back discharge to a top discharge configuration, a new duct
extension will need to be added.
For sizes 3 and 6, a new fan assembly will be needed.
For vertical MI fans, field conversions from one configuration
to another can be made for sizes 3-30 by modifying certain
parts of the cabinet. No need to relocate the fans.
For indoor return sections, field conversions from one
configuration to another can be made for sizes 3-30 by
modifying certain parts of the cabinet. Converting fan location
from top to back. Contact Service Parts for foam covers, duct
extensions, and fan supports.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
1. Disconnect power from the unit.
2. Remove access door and remove wall panel from non-
drive side of the fan section.
3. Remove the screws inside the cabinet along the top of the
coil that secure the coil to the cabinet roof. Remove the
screws that attach the roof to the side walls and the front
panel.
4. Remove roof.
5. If horizontal (front or back) discharge, loosen and remove
j-bolt securing fan housing to cabinet.
6. Loosen bolts securing sliding motor base in place and
loosen nuts on belt tensioning j-bolt.
36
7. Remove V-belt(s).
8. Detach fan from the isobase and rotate to the desired
discharge position.
9. It may be necessary to remove and reinstall the fan shaft
on the opposite side depending on the new discharge
position. Loosen set screws on the fan bearings that hold
the shaft in place. Loosen set screw holding fan in place.
Remove shaft from the fan and reinstall so that the driven
end is on the opposite side.
10. Reattach fan to the isobase.
11. Reattach v-belt, tighten, and secure sliding motor base in
place. Because the distance between the motor shaft and
the fan shaft may change, it may be necessary to purchase
a new V-belt.
12. Cut a hole in the discharge panel for the air discharge and
cover the exposed foam insulation at the inside edges of
the hole using the insulation cover channels installed on
the other discharge panel.
13. If changing from horizontal discharge to vertical (such as
front/top to top/ front) the duct extension will be different.
Contact Service Parts for a duct extension kit.
Figure 38. Contact service parts for front/top duct
extension kit
Front/Top
Figure 39. Contact service parts for top/front duct
extension kit
Top/Front
14. The duct extensions do not extend as far and do not reach
the cabinet panel. The gap is bridged by a flexible foam
gasket. Contact Service Parts for angle/gasket ki
CLCH-SVX009L-EN
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