Carrier 58MCA Installation, Start-up, And Operating Instructions Manual

Also see for GAS FURNACE 58MXA: User's information manual User manual Service and maintenance instructions User's information manual User's information manual

Carrier 58MCA Installation, Start-up, And Operating Instructions Manual Manual pdf 13 page image

Provide ample space for servicing and cleaning. Always complywith minimum fire protection clearances shown on unit’s clear-ance to combustibles label. (See Fig. 3.) Locate furnace whereavailable electric power and gas supplies meet specifications onfurnace rating plate.Step 2—Furnace Location Relative to CoolingEquipmentThe cooling coil must be installed parallel with or on downstreamside of furnace to avoid condensation in heat exchanger. Wheninstalled parallel with a furnace, dampers or other means used tocontrol flow of air must prevent chilled air from entering furnace.If dampers are manually operated, they must be equipped with ameans to prevent operation of either unit unless damper is infull-heat or full-cool position.Step 3—Hazardous LocationsINSTALLATIONStep 1—Leveling Legs (If Desired)When furnace is used in upflow position with side inlet(s), levelinglegs may be desired. (See Fig. 12.) Install field-supplied,corrosion-resistant 5/16-in. machine bolts and nuts.NOTE: The maximum length of bolt should not exceed 1-1/2 in.1. Position furnace on its back. Locate and drill a 5/16-in.diameter hole in each bottom corner of furnace. (See Fig. 12.)Holes in bottom closure panel may be used as guide locations.2. For each hole, install nut on bolt and then install bolt and nutin hole. (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.NOTE: Bottom closure must be used when leveling legs are used.See Bottom Closure Panel section.Step 2—Installation in Upflow or DownflowApplicationsNOTE: For downflow applications, this furnace is approved foruse on combustible flooring when special base (available frommanufacturer) Part No. KGASB0201ALL is used. Special base innot required when this furnace is installed on manufacturer’s CoilAssembly Part No. CD5 or CK5, or Coil Box Part No. KCAKC isused.1. Determine application being installed from Table 1.2. Construct hole in floor per dimensions specified in Table 1and Fig. 13.3. Construct plenum to dimensions specified in Table 1 and Fig.13.4. If downflow subbase (KGASB) is used, install as shown inFig. 14.If Coil Assembly Part No. CD5 or CK5 or Coil Box Part No.KCAKC is used, install as shown in Fig. 15.NOTE: Remove furnace perforated, discharge duct flanges whenthey interfere with mating flanges on coil on downflow subbase.To remove furnace perforated, discharge duct flange, use wideIf these furnaces are installed in an unconditioned spacewhere ambient temperatures may be 32°F or lower, freezeprotection measures must be taken.A9305832°F MINIMUM INSTALLEDAMBIENT OR FREEZEPROTECTION REQUIREDWhen furnace is installed in a residential garage, it must beinstalled so that burners and ignition sources are located aminimum of 18 in. above floor. The furnace must be locatedor protected to avoid physical damage by vehicles. Whenfurnace is installed in a public garage, airplane hangar, orother building having a hazardous atmosphere, unit must beinstalled in accordance with requirements of National FireProtection Association, Inc.A9304418-IN. MINIMUMTO BURNERSFig. 12—Leveling LegsA890141 3⁄4″1 3⁄4″1 3⁄4″1 3⁄4″5⁄16″5⁄16″5⁄16″5⁄16″13