Carrier 50SZ Series Installation, Start-up And Service Instructions Manual

Also see for 50SZ Series: Manual Product data

Contents

Improper installation, adjustment, alteration, service, mainte-nance, or use can cause explosion, fire, electric shock, orother occurrences, which could cause serious injury or deathor damage your property. Consult a qualified installer orservice agency for information or assistance. The qualifiedinstaller or agency must use only factory-authorized kits oraccessories when modifying this product.Recognize safety information. This is the safety-alert symbol .When you see this symbol on the product or in instructions ormanuals, be alert to the potential for personal injury.Understand the signal words — DANGER, WARNING, CAU-TION, and NOTE. Danger identifies the most serious hazards,which will result in severe personal injury or death. Warningindicates a condition that could cause serious personal injury ordeath. Caution is used to identify unsafe practices, which mayresult in minor personal injury or product and property damage.NOTE is used to highlight suggestions which will result inenhanced installation, reliability, or operation.1. The power supply (volts, phase, and hertz) must correspond tothat specified on unit rating plate.2. The electrical supply provided by the utility must be sufficientto handle load imposed by this unit.3. This installation must conform with local building codes andwith NEC (National Electrical Code). Refer to provincial andlocal plumbing or waste water codes and other applicable localcodes.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.Before performing service or maintenance operations onsystem, turn off main power to unit. Turn off accessory heaterpower switch if applicable.INTRODUCTIONThe 50SZ heat pump is fully self-contained and designed foroutdoor installation (See Fig. 1). Standard units are shipped in ahorizontal-discharge configuration for installation on a ground-level slab. Units can be converted to downflow (vertical) dischargeconfigurations for rooftop applications.RECEIVING AND INSTALLATIONStep 1—Check EquipmentIDENTIFY UNITThe unit model number and serial number are stamped on the unitidentification plate. Check this information against shipping pa-pers.INSPECT SHIPMENTInspect for shipping damage while unit is still on shipping pallet.If unit 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. Manu-facturer is not responsible for any damage incurred in transit.Check all items against shipping list. Immediately notify thenearest Carrier Air Conditioning office if any item is missing. Toprevent loss or damage, leave all parts in original packages untilinstallation.Step 2—Provide Unit SupportROOF 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 is criticalfor a watertight seal. Install gasketing material supplied with theroof curb. Improperly applied gasketing also can result in air leaksand poor unit performance.Curb should be level to within 1/4 in. (See Fig. 6). This isnecessary for unit drain to function properly. Refer to accessoryroof curb installation instructions for additional information asrequired.SLAB MOUNTPlace the unit on a solid, level concrete pad that is a minimum of4 in. thick with 2 in. above grade (See Fig. 7). The slab shouldextend approximately 2 in. beyond the casing on all 4 sides of theunit. Do not secure the unit to the slab except when required bylocal codes.GROUND 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—Provide ClearancesThe required minimum service clearances are shown in Fig. 2 and3. Adequate ventilation and outdoor air must be provided. Theoutdoor fan draws air through the outdoor coil and discharges itthrough the top fan grille. Be sure that the fan discharge does notrecirculate to the outdoor coil. Do not locate the unit in either acorner or under an overhead obstruction. The minimum clearanceunder a partial overhang (such as a normal house overhang) is 36in. above the unit top. The maximum horizontal extension of apartial overhang must not exceed 48 in. For extended overhangs,provide a minimum clearance of 48 in.IMPORTANT: Do not restrict outdoor airflow. An air restrictionat either the outdoor-air inlet or the fan discharge may bedetrimental to compressor life.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 or other combustible materials. Slab-mounted unitsshould be at least 4 in. above the highest expected water and runofflevels. Do not use unit if it has been under water.Step 4—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.INSPECTIONPrior to initial use, and at monthly intervals, all rigging bracketsand straps should be visually inspected for any damage, evidenceof wear, structural deformation, or cracks. Particular attentionshould be paid to excessive wear at hoist hooking points and loadsupport areas. Brackets or straps showing any kind of wear in theseareas must not be used and should be discarded.2