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

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Carrier 58MVP Installation, Start-up, And Operating Instructions Manual Manual pdf 15 page image

INSTALLATIONStep 1—Leveling Legs (If Desired)When furnace is used in upflow position with side inlet(s), levelinglegs may be desired. (See Fig. 18.) 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. 18.)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. 19.3. Construct plenum to dimensions specified in Table 1 and Fig.19.4. If downflow subbase (KGASB) is used, install as shown inFig. 20.If coil assembly CD5 or CK5 or Coil Box KCAKC is used,install as shown in Fig. 21.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 handseamers, wide duct pliers or duct flange tool to bend flange backand forth until it breaks off. Be careful of sharp edges. (See Fig.22.)Do not bend duct flanges inward as shown in Fig. 22. 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. 22.Step 3—Installation in Horizontal ApplicationsThese furnaces can be installed in either horizontal left or rightdischarge position. In a crawlspace, furnace can either be hungfrom floor joist or installed on suitable blocks or pad. Furnace canbe suspended from each corner by hanger bolts and angle ironsupports. (See Fig. 23.) Cut hanger bolts (4 each 3/8-in. all-threadrod) to desired length. Use 1 X 3/8-in. flat washers, 3/8-in.lockwashers, and 3/8-in. nuts on hanger rods as shown in Fig. 23.Dimples are provided for hole locations. (See Fig. 2.)The entire length of furnace MUST be supported whenfurnace is used in a horizontal position to ensure properdraining. When suspended, bottom brace supports sides andcenter blower shelf. When unit is supported from the ground,blocks or pad should support sides and center blower shelfarea. Failure to follow this caution will result in intermittentunit operation or performance satisfaction.Step 4—Air DuctsGENERAL REQUIREMENTSThe duct system should be designed and sized according toaccepted national standards such as those published by: AirConditioning Contractors Association (ACCA), Sheet Metal andAir Conditioning Contractors National Association (SMACNA) orAmerican Society of Heating, Refrigerating and Air ConditioningEngineers (ASHRAE) or consult The Air Systems Design Guide-lines reference tables available from your local distributor. Theduct system should be sized to handle the required system designCFM at the design static pressure.When a furnace is installed so that the supply ducts carry aircirculated by the furnace to areas outside the space containing thefurnace, the return air must also be handled by a duct(s) sealed tothe furnace casing and terminating outside the space containing thefurnace.Secure ductwork with proper fasteners for type of ductwork used.Seal supply- and return-duct connections to furnace with codeapproved tape or duct sealer.Flexible connections should be used between ductwork andfurnace to prevent transmission of vibration. Ductwork passingthrough unconditioned space should be insulated to enhancesystem performance. When air conditioning is used, a vaporbarrier is recommended.Maintain a 1-in. clearance from combustible materials to supply airductwork for a distance of 36 in. horizontally from the furnace. SeeNFPA 90B or local code for further requirements.For a furnace not equipped with a cooling coil, the outlet duct shallbe provided with a removable access panel. This opening shall beaccessible when the furnace is installed and shall be of such a sizethat the heat exchanger can be viewed for possible openings usinglight assistance or a probe can be inserted for sampling the airstream. The cover attachment shall prevent leaks.Fig. 18—Leveling LegsA890141 3⁄4″1 3⁄4″1 3⁄4″1 3⁄4″5⁄16″5⁄16″5⁄ 16″5⁄ 16″15→