Carrier 38MA R Series Installation Instructions Manual

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2 Specifications subject to change without notice. 38MAR-04SISAFETY CONSIDERATIONSInstalling, starting up, and servicing air- conditioning equipment canbe hazardous due to system pressures, electrical components, andequipment location (roofs, elevated structures, etc.).Only trained, qualified installers and service mechanics should install,start- up, and service this equipment.Untrained personnel can perform basic maintenance functions suchas coil cleaning. All other operations should be performed by trainedservice personnel only.When working on the equipment, observe the precautions in theliterature and on tags, stickers, and labels attached to the equipment.Follow all safety codes.Wear safety glasses and work gloves. Keep aquenching cloth and a fire extinguisher nearby when brazing. Use carein handling, rigging, and setting bulky equipment.Read these instructions thoroughly and follow all warnings orcautions included in the literature and attached to the unit. Consultlocal building codes and National Electrical Code (NEC) for specialrequirements. Recognize safety information.This is the safety - alert symbol . When you see this symbol onthe unit and in instructions or manuals, be alert to the potential forpersonal injury. Understand these signal words: DANGER,WARNING, and CAUTION. These words are used with thesafety- alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death.WARNING signifies hazards which could result in personal injury ordeath.CAUTION is used to identify unsafe practices which may result inminor personal injury or product and property damage.NOTE is used to highlight suggestions which will result in enhancedinstallation, reliability, or operation.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injury ordeath.Before installing, modifying, or servicing system, the mainelectrical disconnect switch must be in the OFF position. Theremay be more than 1 disconnect switch. Lock out and tag switchwith a suitable warning label.WARNINGEXPLOSION HAZARDFailure to follow this warning couldresult in death, serious personal injury,and/or property damage.Never use air or gases containing oxygenfor leak testing or operating refrigerantcompressors. Pressurized mixtures of airor gases containing oxygen can lead to anexplosion.WARNINGEQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipment damage orimproper operation.Do not bury more than 36 in. (914 mm) of refrigerant pipe in theground. If any section of pipe is buried, there must be a 6 in. (152mm) vertical rise to the valve connections on the outdoor units. Ifmore than the recommended length is buried, refrigerant maymigrate to the cooler buried section during extended periods ofsystem shutdown. This causes refrigerant slugging and couldpossibly damage the compressor at start-up.CAUTION