Fig. 15 Ð Field Control Thermostat Wiring
IX. OUTDOOR-AIR INLET ASSEMBLY
A. Economizer
NOTE: If accessory power exhaust or barometric relief pack- ages are being added to the unit, install power exhaust or barometric relief before installing economizer hoods.
Economizer Hood Assembly
The economizer hood is shipped in a package secured to the outside of the unit and must be ®eld assembled. There are 2 hoods on every unit. The 580H units are side supply and side return. The return duct limits access to economizer ®lters from below. Filter tracks (mounting angle without tabs) must be installed correctly to allow access to economizer ®lters from each side.
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.
Perform the following procedure to assemble the economizer hood:
1.a. Apply black seal strip (provided in package) to out- side top edge of hood sides. Wrap seal strip over to cover top ¯ange (4 hood sides). Make certain seal strip covers screw holes. Allow strip to overhang 1¤8 in. past end opposite mounting ¯ange. See Fig. 16.
b.Assemble hood sides, top, and cross member with gas- keted screws provided. See Fig. 17.
c.Attach 10 green speed clips (provided) to hood top.
d.Apply black seal strip to mounting ¯anges (cover holes) of hood sides. See Fig. 18.
NOTE: Each hood assembly has a slotted side that should be adjacent to the other hood when mounted to the unit.
e.Apply black seal strip to hood top mounting ¯ange. Seal strip of hood top mounting ¯ange must press against seal strip of hood side mounting ¯anges. See Fig. 19.
f.Add gray foam strip (provided) to cross members at bottom tray. See Fig. 20.
TOP
FLANGE
BLACK
SEALHOOD SIDE STRIP
Fig. 16 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 opposite side.
Fig. 17 Ð Economizer Hood Assembly
(Right-Side Economizer Hood Shown)
Exhaust Mounting Details
g.Place gray foam strip on inside of slotted hood side between ®lter and cross member opposite mounting end. See Fig. 21.
h.Attach gray foam strip to blockoff baffle on outer face area of ¯ange. See Fig. 22.
2.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.
3.Attach accessory enthalpy bracket on hood side fur- thest from control box end. Locate bracket on inside upper right hand corner using hood mounting holes. Mount
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