Carrier 50EY, 50EJ, 50EW Ð Adding Seal Strip to Top of Hood Sides, Mounting Flange of Hood Sides

NOTE: Before assembly of the economizer hood, check along the outer edges of the economizer assembly for any seal strip protruding past the ¯anges. Trim the excess seal strip so that it is ¯ush with the economizer assembly ¯anges.

1.Apply black seal strip (provided in package) to outside top-edge of hood sides. Wrap seal strip over edge to cover top ¯ange (4 hood sides). Make sure seal strip covers screw holes. Allow strip to overhang 1¤8-in. past the end opposite the mounting ¯ange. See Fig. 18.

2.Assemble hood sides, top, and cross member with gas- keted screws provided. See Fig. 19.

3.Attach 10 green speed clips (provided) to hood top.

4.Apply black seal strip (provided) to mounting ¯anges of hood sides being sure to cover mounting holes. See Fig. 20.

NOTE: Each hood assembly has a slotted side that should be adjacent to the other hood when mounted to the unit.

5.Apply black seal strip (provided) to hood top mounting ¯ange. Seal strip of hood top mounting ¯ange must press tightly against seal strip of hood side mounting ¯anges. See Fig. 21.

6.Add gray foam strip (provided in package) to cross mem- bers on bottom tray. See Fig. 22.

7.Place gray foam strip (provided) on inside of slotted hood side between ®lter and cross member opposite the mount- ing end. See Fig. 23.

8.Attach gray foam strip (provided) to block-off baffle on outer face of ¯ange. See Fig. 24.

9.Remove the screws on each end and along top of damper assembly of unit. Remove top 2 screws on each side of ®lter panel under damper assembly. Set hood assembly in place and attach to unit using these screws.

10.Attach accessory enthalpy bracket on hood side furthest from control box end. Locate bracket on inside upper right-hand corner of economizer hood using hood mount- ing holes. Mount outdoor-air thermistor to enthalpy bracket (if purchased). Attach and wire enthalpy assembly. Place quick connects on enthalpy wires.

11.Remove screws along bottom of damper assembly. Lo- cate and mount blockoff baffle using these screws.

12.Assemble 2 ®lter tracks side-by-side with the as- sembled ends together.

13.Attach mounting angle (without tabs) to the assembled end of the ®lter track. See Fig. 25.

14.Attach 6 green speed clips (provided) to mounting angles. Engagement section of clip faces inside of rack.

TOP

FLANGE

BLACK

SEALHOOD SIDE STRIP

Fig. 18 Ð Adding Seal Strip to

Top of Hood Sides

NOTE: Left side economizer hood has mounting angle without tabs and ®lter track assembled end on the opposite side.

Fig. 19 Ð Economizer Hood Assembly (Right-Side Economizer Hood Shown)

MOUNTING

FLANGE

HOOD SIDE

Fig. 20 Ð Adding Seal Strip to

Mounting Flange of Hood Sides

15.Attach remaining mounting angle (with tabs) to other end of the ®lter track with no. 10 screws provided. See Fig. 26.

16.Place ®lter track assembly in bottom of hood by placing tabbed end into slotted side (with tab on bottom) and attaching opposite end to hood with speed clips and gas- keted screws provided. Tabs can be hand bent after they have been inserted into the side.

NOTE: The ®lter track assembly end with screws should face away from the other hood when mounted on the unit. NOTE: Tabs from both ®lter tracks will be in the same space. After one ®lter track has been inserted into board, bend the tabs so they will not interfere with installation of the second hood.

17.Attach black seal strip (provided) to ®lter cover. Seal strip should be applied to the center of the large ¯ange making sure to cover holes. See Fig. 27.

18.Slide two 20 x 25-in. ®lters into cross members of hood assembly. Attach ®lter cover over ®lters with screws and speed clips provided.

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