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

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Carrier 58DLA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 11 page image

11BottomClosure PanelBottom Filler PanelA10273Fig. 9 -- Removing Bottom Closure Panel2. Outdoor openings shall be located as required in the Out-door Combustion Air Method mentioned previously and,3. Outdoor openings shall be sized as follows:a. Calculate the Ratio of all Indoor Space volume dividedby required volume for Indoor Combustion Air Meth-od below.b. Outdoor opening size reduction Factor is 1 minus the Ra-tio in a. above.c. Minimum size of Outdoor openings shall be the size re-quired in Outdoor Combustion Air Method above multi-plied by reduction Factor in b. above. The minimum di-mension of air openings shall be not less than 3 in. (80mm).INSTALLATIONUPFLOW 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 two screws holding bot-tom filler panel. (See Fig. 9.)2. Rotate bottom filler panel downward to release holdingtabs.3. Remove bottom closure panel.4. Reinstall bottom 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. Do not use side return--airopenings in DOWNFLOW configuration.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 areused. It may be necessary to remove and reinstall bottom closurepanel to install leveling legs. To remove bottom closure panel, seeItem 1. in Bottom Return Air Inlet section.To install leveling legs:1. Position furnace on its back. Locate and drill a hole ineach bottom corner of furnace. (See Fig. 10.)2. For each leg, install nut on bolt and then install bolt andnut in hole. (Install flat washer if desired).1 3 /4″1 3 /4″1 3/ 4″1 3/ 4″5/ 16″5 /16″5/ 16″5/ 16″(44mm)(8mm)(44mm)(8mm)(8mm)(8mm)(44mm)(44mm)A89014Fig. 10 -- Leveling Legs3. Install another nut on other side of furnace base. (Installflat washer if desired).4. Adjust outside nut to provide desired height, and tighteninside nut to secure arrangement.5. Reinstall bottom closure panel if removed.DOWNFLOW INSTALLATIONNOTE: For downflow applications, this furnace is approved foruse on combustible flooring when any one of the following 3accessories are used:S Special Base, KGASBS Cased Coil Assembly Part No. CNPV, CNRV, CAP, orCARS Coil Box Part No. KCAKC1. Determine application being installed from Table 4.2. Construct hole in floor per Table 4 and Fig. 11.3. Construct plenum to dimensions specified in Table 4 andFig. 11.4. If downflow subbase, KGASB is used, install as shown inFig. 12. If Coil Assembly Part No. CAPVP, CAPMP, andCNPVP or Coil Box Part No. KCAKC is used, install asshown in Fig. 13.NOTE: It is recommended that the perforated supply--air ductflanges be completely folded over or removed from furnace wheninstalling the furnace on a factory--supplied cased coil or coil box.To remove the supply--air duct flange, use wide duct pliers orhand seamers to bend flange back and forth until it breaks off. Becareful of sharp edges. (See Fig. 14.)Bottom 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 two screws holding bot-tom filler panel. (See Fig. 9.)2. Rotate bottom filler panel downward to release holdingtabs.3. Remove bottom closure panel.4. Reinstall bottom filler panel and screws58DL