Carrier 40MFC Installation Instructions Manual

Also see for 38MFC: Service manual Owner's manual

Contents

3SAFETY CONSIDERATIONSInstalling, starting up, and servicing air--conditioning equipmentcan be hazardous due to system pressures, electrical components,and equipment location (roofs, elevated structures, etc.).Only trained, qualified installers and service mechanics shouldinstall, start--up, and service this equipment.Untrained personnel can perform basic maintenance functions suchas cleaning coils. All other operations should be performed bytrained service personnel.When working on the equipment, observe precautions in theliterature and on tags, stickers, and labels attached to theequipment.Follow all safety codes. Wear safety glasses and work gloves. Keepquenching cloth and fire extinguisher nearby when brazing. Usecare in handling, rigging, and setting bulky equipment.Read these instructions thoroughly and follow all warnings orcautions included in literature and attached to the unit. Consultlocal building codes and National Electrical Code (NEC) forspecial requirements. Recognize safety information. This is thesafety--alert symbol !! . When you see this symbol on the unit andin instructions or manuals, be alert to the potential for personalinjury.Understand these signal words: DANGER, WARNING, andCAUTION. These words are used with the safety--alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazardswhich could result in personal injury or death. CAUTION is usedto identify unsafe practices which may result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability, oroperation.! WARNINGELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Before installing, modifying, or servicing system, mainelectrical disconnect switch must be in the OFFposition. There may be more than 1 disconnect switch.Lock out and tag switch with a suitable warning label.EXPLOSION HAZARDFailure to follow this warning couldresult in death, serious personal injury,and/or property damage.Never use air or gases containingoxygen for leak testing or operatingrefrigerant compressors. Pressurizedmixtures of air or gases containingoxygen can lead to an explosion.! WARNINGCAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Do not bury more than 36 in. (914 mm) of refrigerant pipein the ground. If any section of pipe is buried, there must bea 6 in. (152 mm) vertical rise to the valve connections onthe outdoor units. If more than the recommended length isburied, refrigerant may migrate to the cooler buried sectionduring extended periods of system shutdown. This causesrefrigerant slugging and could possibly damage thecompressor at start--up.SYSTEM REQUIREMENTSAllow sufficient space for airflow and servicing unit. See Fig. 1and 4 for minimum required distances between unit and walls orceilings.PipingIMPORTANT: Both refrigerant lines must be insulatedseparately.S Minimum refrigerant line length between the indoor and outdoorunits is 10 ft. (3 m).S The following maximum lengths are allowed:REFRIGERANT LINE LENGTHS ft. (m)Unit Size Max Line Length Max Elevation(ID over OD) Max Elevation(OD over ID)9K 65 (20) 25 (8) 25 (8)12K 65 (20) 25 (8) 25 (8)17K HP 65 (20) 30 (10) 30 (10)18K AC 65 (20) 30 (10) 30 (10)22K 98 (30) 30 (10) 30 (10)S The following are the piping sizes.PIPE SIZES (in)Unit Size Mix Phase Vapor9K 1/4 3/812K 1/4 1/217K HP 1/4 1/218K AC 1/4 1/222K 3/8 5/8Refrigerant ChargeREFRIGERANT CHARGE lb. (kg)Unit Size Air Conditioner (AC) Heat Pump (HP)9K 1.34 (0.61) 2.70 (1.18)12K 1.43 (0.65) 2.70 (1.18)17K HP NA 2.87 (1.30)18K AC 1.87 (0.85) NA22K 2.60 (1.18) 3.52 (1.60)S Above charge is for piping runs up to 25 ft. (7.6 m).S For piping runs greater than 25 ft. (7.6 m), add refrigerantup to the allowable length as specified below:ADDITIONAL REFRIGERANT CHARGEUnit Size oz./ft. (g/m)9K --- 18K 0.16 (15)22K 0.32 (30)S Capillary tubes in outdoor unit are used as metering devices.