Carrier CRPWREXH068A00 Installation Instructions Manual

6Power Exhaust Installation for Horizontal ReturnAir ApplicationsUse the following instructions for horizontal return air duct appli-cations of the power exhaust fan assembly. (See Fig. 10.)1. A transition in the duct height is required. To assure that thetransition required will accommodate the exhaust openingsize begin at least 5 ft away from the back of the outside airhood. Provide a 42.5 in. W x 23.2 in. H opening in the side ofthe return air duct, as shown in Fig. 11.NOTE: Any obstruction closer than 5 ft will interfere withairflow and result in rain entering the hood through the filters.2. Provide engagement holes (12) for 1/4-14 x 3/4 in. gaskethead screws (AL31AZ308) around the opening as shown inFig. 11.3. Apply silicone caulking to corners and back side of matingflanges of the power exhaust fan assembly.4. Set the power exhaust hood assembly into the opening in theduct, bottom lip first as shown in Fig. 12.5. Lift the assembly to allow the bottom corner tabs to hookover the opening in the duct work. (See Fig. 12.)Fig. 10 — Typical Horizontal Air Return ApplicationFig. 11 — Horizontal Discharge Mounting OpeningCAUTIONCUT HAZARDFailure to follow this caution may result in personal injury.Sheet metal parts may have sharp edges or burrs. Use care andwear appropriate protective clothing, safety glasses and gloveswhen handling parts and servicing air conditioning equipment.Outdoor AirHoodField SuppliedReturn DuctPower Exhaust5 in. Min.Clearance5 ft. Minimum0.6223.120.950.99 42.502 x 10.25 (=20.50)0.460.999.25 2 x 12.00 ( =2 4.00) Engagement holes for1/4-14 x 3/4 in. gasket head screws(12 places)

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