Step 11 - Install Outdoor Air Hood - Carrier COMFORTLink PURON 48PM20 Installation Instructions Manual

Step 11 — Install Outdoor Air Hood
Perform the following procedure to install the outdoor-air hood on
units equipped with an economizer, two-position damper, or
manual outdoor air damper:
1. Remove blank panel from return end of unit (hood section).
Save the screws. See Fig. 20 for shipping location of
components.
2. Hood sides are fastened to sides of outdoor air opening.
Remove the hood sides and save the screws (3 each side).
3. Remove the bracket holding the bottom half of the hood in
the shipping position. Remove the hood bottom half and
filters (or manual dampers on units so equipped) from
outdoor section.
HOOD
SIDE
HOOD TOP
(TOP HALF)
HOOD
SIDE
RETURN AIR
SECTION
Fig. 20 - - Power Exhaust or Barometric Relief Damper
Mounting Details
UPPER HOOD
TOP PANEL
SEAL
STRIP
LOCATION
LOWER HOOD
TOP PANEL
FILTER
BRACKET
NOTE: Units with manual damper only use one filter.
NOTE:
attached to the unit basepan. To access the components, remove the
panel below the outdoor air intake section.
HOOD TOP
(BOTTOM HALF)
NOTE: For units with manual dampers, replace the end filters
with the manual dampers. Install the filter in the center between the
manual dampers.
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ADD
SEAL
STRIP
HOOD
SIDE
SIDE
FILTER
GUIDE
FILTERS
MANUAL
DAMPER
(IF EQUIPPED)
Fig. 21 - - Bracket and Hood Positioning
18
On units without economizers, the components are
4. Remove inner filter track from shipping position in outdoor
section. Position inner filter track so track is facing outward
from the unit. Install the filter track with 4 screws provided.
5. Apply seal strip (provided) to back flange of both hood
sides where hood side connects to the unit back panel. (See
Fig. 21.)
6. Apply seal strip (provided) to top flange of both hood sides
where hood sides connect to the hood top panels. (See Fig.
21.)
7. Install hood sides to the back panels using the screws from
item 2. The sloped flanges point outward. The drip edges of
the side panels should face outward as well. The filter
guides to the hood sides. The flanges of the filter guides
should face inward to hold the filters in place. (See Fig. 21.)
8. Apply seal strip along the entire length of the bottom flange
of the hood top. (See Fig. 21.)
9. Install the bottom part of the hood top using 4 screws
provided. (See Fig. 21.)
10. Remove the packaging from filters (3) and install into the
filter tracks. Slide the filters to the sides then place the last
filter into the center of the filter track.
ADD
FILTER
SEAL
STRIP
RETAINER
TRACK
SIDE
FILTER
GUIDE
ADD
SEAL
STRIP
ADD
SEAL
STRIP
HOOD
SIDE
UNIT
BACK
PANEL
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