Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions

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Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 9 page image

the structure shall be at least 1 in. from the sides and backand 6 in. from the front of the appliances. See Table 2 andFig. 8.When ducts are used, they must be of the same cross sectional areaas the free area of the openings to which they connect. Theminimum dimension of ducts must not be less than 3 in.INSTALLATIONStep 1—Upflow InstallationBOTTOM RETURN AIR INLETThese furnaces are shipped with bottom closure panel installed inbottom return-air opening. Remove and discard this panel whenbottom return air is used. To remove bottom closure panel,perform the following:1. Tilt or raise furnace and remove 2 screws holding front fillerpanel. (See Fig. 9.)2. Rotate front filler panel downward to release holding tabs.3. Remove bottom closure panel.4. Reinstall front filler panel and screws.SIDE RETURN AIR INLETThese furnaces are shipped with bottom closure panel installed inbottom return-air opening. This panel MUST be in place whenonly side return air is used.NOTE: Side return-air openings can be used in UPFLOW andmost HORIZONTAL configurations ONLY.LEVELING LEGS (IF DESIRED)In upflow position with side return inlet(s), leveling legs may beused. (See Fig. 10.) Install field-supplied, 5/16 X 1 1/2 in. (max)corrosion-resistant machine bolts, washers and nuts.NOTE: Bottom closure must be used when leveling legs are used.It may be necessary to remove and reinstall bottom closure panelto install leveling legs. To remove bottom closure panel, see Step1 above.To install leveling legs:1. Position furnace on its back. Locate and drill a hole in eachbottom corner of furnace. (See Fig. 10.)2. For each leg, install nut on bolt and then install bolt and nut inhole. (Install flat washer if desired.)3. Install another nut on other side of furnace base. (Install flatwasher if desired.)4. Adjust outside nut to provide desired height, and tighten insidenut to secure arrangement.5. Reinstall bottom closure panel if removed.Step 2—Downflow InstallationNOTE: For downflow applications, this furnace is approved foruse on combustible flooring when any one of the 3 accessories areused:• Special Base, KGASB0201ALL• Cased Coil Assembly Part No. CD5 or CK5Table 2–Minimum Free Area of Combustion Air Opening*FURNACEINPUT(BTUH)AIR FROM INDOORUNCONFINED SPACEOUTDOOR AIR THROUGHVERTICAL DUCTSOUTDOOR AIR THROUGHHORIZONTAL DUCTSOUTDOOR AIR THROUGHSINGLE DUCTFree Areaof Opening(Sq In.)Free Area ofOpening and Duct(Sq. In.)Round Pipe(in. Dia)Free Area ofOpening and Duct(sq In.)Round Pipe(in. Dia)Free Area ofOpening and Duct(Sq In.)Round Pipe(In. Dia)66,000 100 16.5 5 33 7 22.0 688,000 100 22.0 6 44 8 29.3 711,000 110 27.5 6 55 9 36.7 7132,000 132 33 7 66 10 44.0 8154,000 154 38.5 7 77 10 51.3 8* Free area shall be equal to or greater than the sum of the areas of all vent connectors in the confined space. Opening area must be increased if other gas appliances inthe space require combustion air.Fig. 9—Removing Bottom Closure PanelA02098Fig. 10—Leveling LegsA020711 3⁄4″1 3⁄4″1 3⁄4″1 3⁄4″5⁄16″5⁄16″5⁄16″5⁄16″8