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

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

The furnace can operate in the high-fire mode when certainfault conditions occur. The following precautions should betaken:1. Size gas piping based on the high-fire input.2. Check the high-fire input and adjust it per the mainliterature instructions.NEVER assume the high-fire input rate is not important forlow-fire-only installation.Step 3—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 4—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: This furnace is approved for use on combustible flooringwhen manufacturer’s accessory floor base, Part No.KGASB0201ALL, is used. Manufacturers accessory floor 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 CD5 or CK5 or Coil Box 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 wideduct pliers or duct flange tool to bend flange back and forth untilit breaks off. Be careful of sharp edges. (See Fig. 16.)Do not bend duct flanges inward as shown in Fig. 16. Thiswill affect airflow across heat exchangers and may cause limitcycling or premature heat exchanger failure. Remove ductflange completely or bend it inward a minimum of 210° asshown in Fig. 16.When 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