Carrier SEER 48ES Installation Instructions Manual

Also see for 48ES: Owner's information manual Installation instructions

Contents

Carrier SEER 48ES Installation Instructions Manual Manual pdf 2 page image

2(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code(NEC) NFPA 70.In Canada refer to the current editions of the National Standards ofCanada CAN/CSA--B149.1 and .2 Natural Gas and PropaneInstallation codes, and Canadian Electrical Code CSA C22.1Recognize safety information. This is the safety--alert symbol .When you see this symbol on the unit and in instructions or manu-als, be alert to the potential for personal injury. Understand thesesignal words: DANGER, WARNING, and CAUTION. Thesewords are used with the safety--alert symbol. DANGER identifiesthe most serious hazards which will result in severe personal injuryor death. WARNING signifies hazards which could result in per-sonal injury or death. CAUTION is used to identify unsafe practic-es which may result in minor personal injury or product and prop-erty damage. NOTE is used to highlight suggestions which willresult in enhanced installation, reliability, or operation.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Before installing or servicing system, always turn off mainpower to system and install lockout tag. There may bemore than one disconnect switch. Turn off accessory heaterpower switch if applicable.! WARNINGFIRE, EXPLOSION, ELECTRICAL SHOCK ANDCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personalinjury or unit damage.A qualified installer or agency must use onlyfactory--authorized kits or accessories when modifying thisproduct.WARNING!INTRODUCTIONThe 48ES unit (see Fig. 1) is a fully self--contained, combinationCategory I gas heating/electric cooling unit designed for outdoorinstallation (See Fig. 3 and 4 for unit dimensions). All unit sizeshave return and discharge openings for both horizontal anddownflow configurations, and are factory shipped with alldownflow duct openings covered. Units may be installed either ona rooftop, a cement slab, or directly on the ground, if local codespermit (See Fig. 5 for roof curb dimensions).Models with an N in the fifth position of the model number arededicated Low NOx units designed for California installations.These models meet the California maximum oxides of nitrogen(NOx) emissions requirements of 40 nanograms/joule or less asshipped from the factory and must be installed in California AirQuality Management Districts or any other regions in NorthAmerica where a Low NOx rule exists.NOTE: Low NOx requirements apply only to natural gasinstallations.RECEIVING AND INSTALLATIONStep 1 — Check EquipmentIdentify UnitThe unit model number and serial number are stamped on the unitinformation plate. Check this information against shipping papers.Inspect ShipmentInspect for shipping damage while unit is still on shipping pallet. Ifunit appears to be damaged or is torn loose from its anchorage,have it examined by transportation inspectors before removal.Forward claim papers directly to transportation company.Manufacturer is not responsible for any damage incurred in transit.Check all items against shipping list. Immediately notify thenearest equipment distribution office if any item is missing. Toprevent loss or damage, leave all parts in original packages untilinstallation.Step 2 — Provide Unit SupportFor hurricane tie downs, contact distributor for details and PE(Professional Engineering) Certificate if required.Roof CurbInstall accessory roof curb in accordance with instructions shippedwith curb (See Fig. 5). Install insulation, cant strips, roofing, andflashing. Ductwork must be attached to curb.IMPORTANT: The gasketing of the unit to the roof curb iscritical for a water tight seal. Install gasketing material suppliedwith the roof curb. Improperly applied gasketing also can result inair leaks and poor unit performance.Curb should be level to within 1/4 in. (6.35 mm). This is necessaryfor unit drain to function properly. Refer to accessory roof curbinstallation instructions for additional information as required.Slab MountPlace the unit on a solid, level concrete pad that is a minimum of 4in. (101.6 mm) thick with 2 in. (50.8 mm) above grade. The slabshould extend approximately 2 in. (50.8 mm) beyond the casing onall 4 sides of the unit. (See Fig. 2.) Do not secure the unit to theslab except when required by local codes.OPTIONALRETURNAIROPENINGOPTIONALSUPPLYAIROPENINGEVAP. COIL COND. COIL2˝(50.8mm)A07926Fig. 2 -- Slab Mounting DetailsGround MountThe unit may be installed either on a slab or placed directly on theground, if local codes permit. Place the unit on level groundprepared with gravel for condensate discharge.Step 3 — Field Fabricate DuctworkSecure all ducts to roof curb and building structure on verticaldischarge units. Do not connect ductwork to unit. For horizontalapplications, unit is provided with flanges on the horizontalopenings. All ductwork should be secured to the flanges. Insulateand weatherproof all external ductwork, joints, and roof openingswith counter flashing and mastic in accordance with applicablecodes.Ducts passing through an unconditioned space must be insulatedand covered with a vapor barrier.If a plenum return is used on a vertical unit, the return should beducted through the roof deck to comply with applicable fire codes.A minimum clearance is not required around ductwork. Cabinetreturn--air static shall not exceed --.25 in. wc.48ES