Step 9 - Install Outdoor Air Hoods - Carrier WeatherExpert 48N2 Installation Instructions Manual

Step 9 — Install Outdoor Air Hoods
Unit sizes 75 to 105 nominal tons have three hoods on both sides.
Unit sizes 120 to 150 nominal tons have four hoods on both sides.
Reference images shown are for three hoods. However, assembly
of four hoods for the larger units is the same. Instructions for un-
packing and assembly of hoods are below.
1. Remove the box from the unit (see Fig. 16).
a. Shipping support straps are bolted to the unit. Remove
four bolts on each, and discard straps.
b. Remove the hood supports (quantity 2 or 3) (see
Fig. 17).
c. Remove packaging from the unit.
d. Reinstall hood supports (Fig. 17).
2. Remove filters located between return/exhaust fan and econ-
omizer dampers, these are packaged separately from hoods
for shipping (see Fig. 16). Screws, other hardware and seal
strips are packaged with the outdoor hoods.
3. Apply seal strip to the unit. Strip should extend around entire
openings (see Fig. 18).
FILTERS
PACKAGING
Fig. 16 — Packaging Locations
Fig. 17 — Hood Supports
4.
5.
SHIPPING
SUPPORT
STRAPS
OUTDOOR
HOODS
(BOTH SIDES)
HOOD SUPPORTS
(BOTH SIDES)
28
Assemble hoods (see Fig. 19).
a. Attach hood sides (Items 1 and 2) to the hood top (Item
3). Fasten hood using six screws on each side.
b. Attach hood support (Item 4) to hood top (Item 3).
c. Attach angle (Item 5) to hood sides (two per hood). Fas-
ten angle to the hood side using three screws per side.
d. Attach hood support (Item 7) to top (Item 3) using six
screws.
e. Attach clips (Item 8) to hood support (Item 7).
f. Attach angle (Item 10) to hood support (Item 7) using
eight screws.
g. Attach angle (Item 9) to angle (Item 10) using two pop
rivets.
h. Place RTV or similar sealant on all of the 6 corners to
prevent water leaks.
i. Install hood assembly to unit using four screws on each
side and nine screws on the top.
j. Install filters (Item 6) to hood assembly.
Repeat Step 4 for each hood.
Fig. 18 — Seal Strips
3
4
9
8
1
Fig. 19 — Hood Assembly
SEAL STRIP
SEAL STRIP
2
5
7
10
6