Carrier 50GL030 Installation, Start-up, And Operating Instructions Manual

Also see for 50GL030: Installation and operating instructions Manual Operating and maintaining guide Guide to operating and maintaining

Contents

injury or product and property damage. NOTE and IMPORTANTare used to highlight suggestions which will result in enhancedinstallation, reliability, or operation.The power supply (volts, phase, and hertz) must correspond to thatspecified on unit rating plate.The electrical supply provided by the utility must be sufficient tohandle load imposed by this unit.This installation must conform with local building codes and withNEC (National Electrical Code) and NFPA 70, NFPA 54/ANSIZ223.1 latest revision, and NFGC (National Fuel Gas Code). Referto provincial and local plumbing or waste water codes and otherapplicable local codes.Approved for outdoor installation on wood flooring or on class A,B or C roof covering materials.These instructions cover minimum requirements and conform toexisting national standards and safety codes. In some instances,these instructions exceed certain local codes and ordinances,especially those that may not have kept up with changing residen-tial construction practices. We require these instructions as aminimum for a safe installation.GENERAL — The 50GL units are fully self-contained, and de-signed for outdoor installation (See Fig. 1). See Fig. 2 and 3 forunit dimensions. All unit sizes have discharge openings for bothhorizontal and downflow configurations, and are factory shippedwith all duct openings covered . Units may be installed either ona rooftop, ground-level cement slab, or directly on the ground iflocal codes permit. See Fig. 4 for roof curb dimensions.RECEIVING AND INSTALLATIONStep 1—Check EquipmentIDENTIFY UNIT — The unit model number and serial numberare stamped on unit identification plate. Check this informationagainst shipping papers and job data.INSPECT SHIPMENT — Inspect for shipping damage while unitis still on shipping pallet. If unit appears to be damaged or is tornloose from its anchorage, have it examined by transportationinspectors before removal. Forward claim papers directly totransportation company. Manufacturer is not responsible for anydamage incurred in transit. Check all items against shipping list.Immediately notify the nearest Carrier Air Conditioning office ifany item is missing. To prevent loss or damage, leave all parts inoriginal packages until installation.Step 2—Provide Unit SupportROOF CURB — Install accessory roof curb in accordance withinstructions shipped with curb (See Fig. 4 for roof curb dimen-sions). Install insulation, cant strips, roofing, and flashing. Duct-work must be attached to curb.IMPORTANT: The gasketing of the unit to the roof curb is criticalfor a watertight seal. Install gasketing material supplied with theroof curb. Improperly applied gasketing can also result in air leaksand poor unit performance. Curb should be level to within 1/4 in.(See Fig. 7). This is necessary for unit drain to function properly.Refer to accessory roof curb installation instructions for additionalinformation as required.SLAB MOUNT — Place the unit on a solid, level concrete padthat is a minimum of 4 in. thick with 2 in. above grade. The slabshould extend 2 in. on sides of the unit. Do not secure the unit tothe slab except when required by local codes.GROUND LEVEL — If local codes permit, the unit can be placeddirectly on the ground. Prepare a level gravel foundation for properdrainage.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 avertical unit, the return should be ducted through the roof deck tocomply with applicable fire codes. A minimum clearance is notrequired around ductwork. Cabinet return-air static shall notexceed -.25 in. wg.Step 4—Provide ClearancesThe required minimum operating and service clearances are shownin Fig. 2 and 3. Adequate ventilation and condenser air must beprovided.Do not restrict condenser airflow. An air restriction at eitherthe outdoor-air inlet or the fan discharge can be detrimental tocompressor life.The condenser fan draws air through the condenser coil anddischarges it through the top fan grill. Be sure that the fandischarge does not recirculate to the condenser coil. Do not locatethe unit in either a corner or under an overhead obstruction. Theminimum clearance under a partial overhang (such as a normalhouse overhang) is 36-in. above the unit top. The maximumhorizontal extension of a partial overhang must not exceed 48 in.Do not place the unit where water, ice, or snow from an overhangor roof will damage or flood the unit. Do not install the unit oncarpeting, tile, or other combustible materials.Step 5—Rig and Place UnitRigging and handling of this equipment can be hazardous for manyreasons due to the installation location (roofs, elevated structures,etc.)Only trained, qualified crane operators and ground support staffshould handle and install this equipment.When working with this equipment, observe precautions in theliterature, on tags, stickers and labels attached to the equipment,and any other safety precautions that might apply.Follow all applicable safety codes. Wear safety shoes and workgloves.INSPECTION — Prior to initial use, and at monthly intervals, allrigging brackets and straps should be visually inspected for anydamage, evidence of wear, structural deformation, or cracks.Particular attention should be paid to excessive wear at hoisthooking points and load support areas. Brackets or straps showingany kind of wear in these areas must not be used and should bediscarded.INSTALLATION1. Remove unit from shipping carton. Leave top shipping skid onthe unit as a spreader bar to prevent the rigging straps fromdamaging the unit. If the wood skid is not available, use aspreader bar of sufficient length to protect unit from damage.2. Position the lifting bracket assembly around the base of theunit. Be sure the strap does not twist.3. Place each of the 4 metal lifting brackets into the handholds inthe composite pan.2