Carrier P3, 48P2 Install Economizer Hoods Units, 25% Outdoor-AirHood Location, Installation Sizes

OUTDOOR AIR HOODS (FIXED)

Fig. 32 — 25% Outdoor-Air Hood Location

SIDE HOODS (ROTATE OPEN)

END HOODS (FIXED)

SIDE HOODS (ROTATE OPEN)

Fig. 33 — Economizer Outdoor-Air Hood

Installation (Sizes 055-100)

SIDE HOODS (ROTATE OPEN)

END HOODS (FIXED)

POWER	SIDE HOODS
	(ROTATE
EXHAUST (FIXED)
	OPEN)

Fig. 34 — Economizer with Power Exhaust Outdoor-Air Hood Installation (Sizes 055-100)

SIDE HOODS (ROTATE OPEN)

END HOODS (FIXED)

RETURN/	SIDE HOODS
	(ROTATE
EXHAUST (FIXED)
	OPEN)

Fig. 35 — Economizer with Return Fan Outdoor-Air Hood Installation (Units with Optional Return Fan)

Step 10 — Install Economizer Hoods (Units

with Optional High-Capacity Power Exhaust) — The economizer uses a total of 4 outdoor 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- mizer hood shipping covers in place.

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 outside of each hood. Screws are in the fastener package taped to the basepan inside the fan section.

5.Apply a bead of RTV or similar sealant to corner of econ- omizer hood at pivot points to prevent water leaks. (See Fig. 29.)

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- mizer hood shipping covers in place.

2.Remove the packages containing the disassembled large 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.

3.Place seal strip on backside of bottom support (Item 7) along entire length of support, covering 6 clearance holes.

4.Attach bottom support piece (Item 7) to unit. Be sure seal strip is between bottom support and panel on unit.

5.Place seal strip on 3/4-in. flange on both the left and right hood sides (Items 1 and 2).

6.Attach the side filter flanges (Item 6) to the left and right hood sides (Items 1 and 2), 2 on each hood side.

7.Attach left and right hood sides (Items 1 and 2) to unit. Be sure seal strip is between hood side and unit.

8.Place seal strip on 3/4-in. flange on hood top (Item 3).

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 strip is between hood top and unit.

11.Attach front support (Item 8) between left and right hood sides.

12.Place seal strip on all filter flanges.

13.Attach filter clips (Item 10) to front and bottom supports (Items 7 and 8).

14.Install filters (Item 9). Filters are held in place with filter clips.

15.Attach hood front (Item 4) to hood top and sides.

16.Apply RTV or similar sealant to 6 places shown in Fig. 37.

33