FILTER
ACCESS
PANEL
OUTDOOR AIR
OPENING
PANEL
SCREWS 
(SIDE)
MANUAL
SCREWSDAMPER BLADE
Fig. 13 — Damper Panel with Manual
Outdoor-Air Damper Installed
Fig. 14 — Outdoor-Air Hood Details
SCREW HOLES (TOP)
HOOD
HOOD SCREEN LOCATION (SCREEN NOT SHOWN)
Fig. 15 — Optional Manual Outdoor-Air
Damper with Hood Attached
Fig. 16 — Outdoor-Air Damper Position Setting
C. Optional EconoMi$er IV
See Fig. 17 for EconoMi$er IV component locations.
NOTE: These instructions are for installing the optional EconoMi$er IV only. Refer to the accessory EconoMi$er IV installation instructions when field installing an EconoMi$er IV accessory.
1.To remove the existing unit filter access panel, raise the panel and swing the bottom outward. The panel is now disengaged from the track and can be removed. See Fig. 18.
2.The box with the economizer hood components is shipped in the compartment behind the economizer. The EconoMi$er IV controller is mounted on top of the EconoMi$er IV in the position shown in Fig. 17. To remove the component box from its shipping posi- tion, remove the screw holding the hood box bracket to the top of the economizer. Slide the hood box out of the unit. See Fig. 19.
IMPORTANT: If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not be used and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly.
3.The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bot- tom of the indoor coil access panel. See Fig. 20.
4.Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 21.
5.Remove the shipping tape holding the economizer barometric relief damper in place.
6.Insert the hood divider between the hood sides. See Fig. 21 and 22. Secure hood divider with 2 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.
7.Open the filter clips which are located underneath the hood top. Insert the aluminum filter into the bot- tom filter rack (hood divider). Push the filter into position past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 22.
8.Caulk the ends of the joint between the unit top panel and the hood top. See Fig. 20.
