Daikin ExtendAire IM 871-3, Installation & Maintenance Data

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Page 2 of 12 M 871-3
3. Bend the hold down tabs on the underside of the cabinet/
wall sleeve grille tray and control door assembly 90º and
remove grille tray (
Figure 4 ).
Figure 4: Typical Wall Construction Types
Bend Grille Tray
Tabs 90º to Remove
Grille Tray
NOTICE
If the optional boost fan is to be installed, install it now, referring to
"ExtendAire™ (Optional) Boost Fan Installation Procedure Com-
mon to Models PDAE/PDHE and PDAF/PDHF" on page 8
If the optional boost fan will not be installed continue ExtendAire
installation as follows.
Note: Before installing mounting brackets be sure they are
assembled as shown in Figure 5 detail.
4. Remove the grilles at the right and left ends of the primary
discharge section ( Figure 5 ). Position Primary Discharge
Section on top of room cabinet ( Figure 5 ). Through the
openings provided by the removed grilles, position the
mounting brackets at each end of the primary discharge
section (
Figure 5 ).
5. Position the short (bottom) mounting bracket channel so
the tabs on each end catch the underside of the grille tray
of the cabinet/sleeve (
Figure 5 ). The long (top) bracket
channel will sit on top of the turned flanges of the Primary
Discharge Section ( Figure 5 ). Adjust the bracket position
and tighten the Phillips head screw on top of the mounting
bracket to secure the discharge section to the cabinet/wall
sleeve.
Note: Be sure the primary discharge section is positioned
evenly end-to end with the cabinet/wall sleeve and that
it is aligned squarely with the front edge of the cabinet/
wall sleeve
!
CAUTION
ExtendAire & Optional Boost Fan
Installation Procedure Models PDAE
and PDHE
Installation and maintenance is to be performed only by qualified
personnel who are familiar with, and in compliance with state, lo-
cal and national codes and regulations, and experienced with this
type of equipment. Sharp edges and coil surfaces are potential
injury hazards. Avoid contact with them.
1. Remove front panel by removing the two screws located
along the top edge of the panel below the cabinet front edge
at the right and left corners (
Figure 2 ). Tilt the top of the
panel out and lift up- and out of slots in the cabinet bottom.
Note: Set front panel aside and retain screws for reinstallation
Figure 2: Remove screws holding front panel, tilt out and
lift up- and out of slots in cabinet/wall sleeve bottom
Remove screws securing front panel
2. Remove chassis from the cabinet/wall sleeve by pulling
and sliding it out ( Figure 3 ).
Note: Do not pull on coils, discharge air frame or critical
components that can be bent or damaged. The drain
pan may be used for pulling the chassis out of the
cabinet.
Figure 3: Slide the chassis out of the cabinet/wall sleeve