Carrier 38GXC Installation Instructions Manual

Also see for 38GXC: Owner's manual Owner's manual Product data Service 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 current editions of the National ElectricalCode ( NEC ) NFPA 70. In Canada, refer to current editions of theCanadian electrical code CSA 22.1.Recognize safety information. This is the safety--alert symbol !! .When you see this symbol on the unit and in instructions ormanuals, be alert to the potential for personal injury.Understandthese signal words: DANGER, WARNING, and CAUTION.These words are used with the safety--alert symbol. DANGERidentifies the most serious hazards which will result in severepersonal injury or death. WARNING signifies hazards whichcould result in personal injury or death. CAUTION is used toidentify unsafe practices which may result in minor personal injuryor 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 of38GXC(Q) outdoor and 40GXC(Q) indoor units duct free systems.SYSTEM REQUIREMENTSAllow sufficient space for airflow and servicing unit. See Fig. 2and 3 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)9 & 12K 65 (20) 35 (11) 35 (11)18K 80 (25) 50 (15) 50 (15)24K 100 (30) 50 (15) 50 (15)S The following are the piping sizes.PIPE SIZESUnit Size Mix Phase Vapor9, 12 & 18K 1/4” 1/2”24K 3/8” 5/8”Refrigerant ChargeREFRIGERANT CHARGEUnit Size Amount of Charge lb. (kg)9 K 2.65 (1.2)12 K 2.8 (1.27)18 K 3.5 (1.6)24 K 5.4 (2.5)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 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 and ground between theoutdoor and indoor unit.Two wires are high voltage AC power, one is low voltage andone 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/CBAMP9 K 115 --- 1 --- 60 20/2512 K 115 --- 1 --- 60 20/2512 K 208/230 --- 1 --- 60 10/1518 K 208/230 --- 1 --- 60 14/2524 K 208/230 --- 1 --- 60 16/30S 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 65 Feet (19.8 m)14 AWG >65 Feet (19.8 m)38/40GXC(Q)