Carrier 40MVC Installation Instructions Manual

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Carrier 40MVC Installation Instructions Manual Manual pdf 3 page image

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.CAUTION!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.GENERALThese instructions cover the installation, start--up and servicing of38MVC,MVQ outdoor and 40MVC, MVQ indoor units duct freesystems.SYSTEM REQUIREMENTSAllow sufficient space for airflow and servicing unit. See Fig. 3and 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) 35 (11) 35 (11)12K 65 (20) 35 (11) 35 (11)18K 100 (30) 50 (15) 50 (15)24K 100 (30) 60 (18) 60 (18)S The following are the piping sizes.PIPE SIZESUnit Size Mix Phase Vapor9K 1/4” 3/8”12K 1/4” 1/2”18K 1/4” 1/2”24K 3/8” 5/8”Refrigerant ChargeREFRIGERANT CHARGE lb. (kg)Unit Size Air Conditioner Heat Pump9K 2.3 (1.0) 2.4 (1.1)12K 2.9 (1.3) 3.0 (1.4)18K 4.4 (2.0) 4.5 (2.0)24K 5.3 (2.4) 5.3 (2.4)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 0.1 oz. ofrefrigerant per foot of extra piping up to the allowablelength.S Capillary tubes in outdoor unit are used as metering devices.Connecting (Power and Control Cable)S The main power is supplied to the outdoor unit. The fieldsupplied connecting cable from the outdoor unit to indoor unitconsists of four wires and provides the power for the indoor unitas well as the communication signal between the outdoor andindoor unit.For 9K and 12K units, all four wires are low voltage DC.For 18K and 24K, two wires are high voltage AC power, one ispulse DC and one is a ground wire.S Consult local building codes, NEC (National Electrical Code) orCEC (Canadian Electrical Code) for special requirements.Model Size Power SourceMIN CKT AMPMAX FUSE/CBAMP9k 115 ---1 ---60 12/2012k 15/2512k208/230 ---1 ---609/1518k 11/2024k 14/25S Connecting Cable: Voltage drop on the connecting cableshould be kept to a minimum. Do not use thermostat wire. Usecable size and max length below:18 AWG 50 Feet (16 m)16 AWG 100 Feet (33 m)38/40MVC, MVQ