Step 10 - Install Economizer Hoods (Units With Optional High-Capacity Power Exhaust) - Carrier WEATHER MASTER P4 Installation Instructions Manual

OUTDOOR
AIR HOODS
(FIXED)
Fig. 32 — 25% Outdoor-Air Hood Location
SIDE HOODS
(ROTATE OPEN)
END HOODS
(FIXED)
Fig. 33 — Economizer Outdoor-Air Hood
Installation (Sizes 055-100)
SIDE HOODS
(ROTATE OPEN)
END HOODS
(FIXED)
POWER
EXHAUST (FIXED)
Fig. 34 — Economizer with Power Exhaust
Outdoor-Air Hood Installation (Sizes 055-100)
SIDE HOODS
(ROTATE OPEN)
END HOODS
(FIXED)
RETURN/
EXHAUST (FIXED)
Fig. 35 — Economizer with Return
Fan Outdoor-Air Hood Installation
(Units with Optional Return Fan)
Step 10 — Install Economizer Hoods (Units
with
Exhaust) —
intake hoods, 2 on each side of the unit. See Fig. 36. Two small
hoods (one per side) are factory-installed and are pivoted
inside the unit chassis for shipment. Two large hoods are
shipped in packages located inside the unit. The large hoods
(one on each side) require field assembly and mounting.
INSTALL SMALL HOODS — To install the small econo-
mizer hoods, perform the following procedure:
1. Remove the 10 screws holding each of the small econo-
2. Pivot hoods outward. (There are a total of 2 hoods.)
3. Apply seal strip to vertical flange of hood sides.
4. Install 15 screws (4 each side, 7 across top) around the
5. Apply a bead of RTV or similar sealant to corner of econ-
INSTALL LARGE HOODS — Large hoods are shipped dis-
assembled in the economizer section of the unit behind the
large economizer hood shipping cover. See Fig. 37 for assem-
bly details for large economizer hoods. To install the large
economizer hoods, perform the following procedure:
1. Remove the 17 screws holding each of the large econo-
SIDE HOODS
2. Remove the packages containing the disassembled large
(ROTATE
OPEN)
3. Place seal strip on backside of bottom support (Item 7)
4. Attach bottom support piece (Item 7) to unit. Be sure seal
5. Place seal strip on
6. Attach the side filter flanges (Item 6) to the left and right
7. Attach left and right hood sides (Items 1 and 2) to unit. Be
SIDE HOODS
(ROTATE
OPEN)
8. Place seal strip on
9. Attach top filter flange (Item 5) to hood top (Item 3).
10. Attach top hood to unit and to hood sides. Be sure seal
11. Attach front support (Item 8) between left and right hood
12. Place seal strip on all filter flanges.
13. Attach filter clips (Item 10) to front and bottom supports
14. Install filters (Item 9). Filters are held in place with filter
15. Attach hood front (Item 4) to hood top and sides.
16. Apply RTV or similar sealant to 6 places shown in
SIDE HOODS
(ROTATE
OPEN)
33
Optional High-Capacity
The economizer uses a total of 4 outdoor
mizer hood shipping covers in place.
outside of each hood. Screws are in the fastener package
taped to the basepan inside the fan section.
omizer hood at pivot points to prevent water leaks. (See
Fig. 29.)
mizer hood shipping covers in place.
economizer hoods (total of 2 packages). Each package
contains the following (see Fig. 37 for Item numbers): left
hood side (Item 1), right hood side (Item 2), hood top
(Item 3), hood front (Item 4), top filter flange (Item 5), 4
side filter flanges (Item 6), bottom support (Item 7), front
support (Item 8), 6 filters (Item 9), 9 filter clips (Item 10),
seal strip, and fasteners.
along entire length of support, covering 6 clearance holes.
strip is between bottom support and panel on unit.
3 / -in. flange on both the left and right
4
hood sides (Items 1 and 2).
hood sides (Items 1 and 2), 2 on each hood side.
sure seal strip is between hood side and unit.
3 / -in. flange on hood top (Item 3).
4
strip is between hood top and unit.
sides.
(Items 7 and 8).
clips.
Fig. 37.
Power