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Summary of Contents for Carrier 38GL2M12G
- Page 1 38GL_M…G 38GL2M12G 38GL3M21G 38GL4M24G 38GL2M18G 38GL2M24G R-410A INSTALLATION MANUAL...
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Page 2: Table Of Contents
• Never open system to atmosphere while it is under vacuum. • When the system must be opened for service, break vacuum with dry nitrogen and replace filter driers. • Do not vent R-410A into the atmosphere. • Use only Carrier matching indoor units (Table I). Quantity CC Models... -
Page 3: Dimensions And Weight
38GL_M…G R-410A Dimensions, weight and minimum clearances Dimensions and weight Ø 8,5 Ø 8,5 Ø 8,5 38GL2M18G 38GL2M12G 38GL4M24G 38GL2M24G 38GL3M21G Model 38GL2M12G 38GL2M18G 38GL2M24G 38GL3M21G 38GL4M24G Minimum clearances Model 38GL2M12G 38GL2M18G 38GL2M24G 38GL3M21G 38GL4M24G GB - 2... -
Page 4: Connections
38GL_M…G R-410A Connections and operating limits E N G L I S H Connections B / B 1 38GL4M24G 38GL2M12G 38GL2M18G 38GL3M21G Outdoor unit 38GL2M24G Indoor unit circuit A Indoor unit circuit A Indoor unit circuit B Pipe diameter Indoor unit circuit B... -
Page 5: General Information
• This installation manual describes the installation procedures of the outdoor unit of a residential split system consisting of two units manufactured by Carrier. Consult factory or a qualified system engineer prior to connecting this unit to any other manufacturer's indoor unit. -
Page 6: Warnings: Avoid
38GL_M…G R-410A Warnings: avoid..E N G L I S H Disconnecting the refrigerant connections after installation: Excessive height difference between indoor and outdoor unit (see thiis will cause refrigerant leaks. Table II "Connections"). Excessive distance between indoor and Connecting the condensate drain pipe to the outdoor unit. outdoor units. -
Page 7: Refrigerant Connections
38GL_M…G R-410A Refrigerant connections No moisture. No dust. Charge liquid-no gas. No leak. No mineral oil. Copper tubes during storage. Neat. 1/2” UNF (R-410A) 7/16” UNF (R-22) Use tools designed for R-410A higher pressure. Keep inside clean. Dry nitrogen brazing. Min. - Page 8 38GL_M…G R-410A Refrigerant connections E N G L I S H Flaring the ends of the tubing Remove protective caps from copper tube ends. Position tube end downward, cut the tube to the requested length and remove the burrs with a reamer. Do not leave system open to atmosphere any longer than minimum required for installation.
- Page 9 38GL_M…G R-410A Refrigerant connections Three-way valve Needle valve Valve cap Valve needle Two-way valve Allen (hex. head) wrench Gas line (large diameter) Liquid line (small diameter) Flare nut Indoor unit Outdoor unit Vacuum pump Air purging Use only a vacuum pump to purge air from the piping. NEVER use the system compressor as a vacuum pump.
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Page 10: Electrical Connections
38GL_M…G R-410A Electrical connections E N G L I S H Cooling only unit C1 Y1 C2 Y2 C3 Y3 C4 Y4 L N R C Y R C Y R C Y R C Y A / A1 B / B1 Terminal box legend Mains supply connecting cable (field wiring). -
Page 11: Electrical Data
20°C d.b. 15°C w.b. indoor 27°C gL type outdoor 35°C d.b. 24°C w.b. outdoor 43°C d.b. 32°C w.b. outdoor 7°C d.b. 6°C w.b. outdoor 24°C d.b. 18°C w.b. Cooling only 38GL2M12G 1460 1850 38GL2M18G 2040 11.7 2500 38GL2M24G 11.5 2625 15.6... -
Page 12: Testing
38GL_M…G R-410A Testing, Pump Down and check the refrigerant charge E N G L I S H ³ » · ³ Superheat °C · Condenser entering dry bulb temperature °C » Evaporator entering wet bulb temperature °C Testing • R-410A refrigerant cylinders contain a dip tube which allows liquid refrigerant to flow from the cylinder in an upright IMPORTANT: position. -
Page 13: Check The Refrigerant Charge
38GL_M…G R-410A Check the refrigerant charge Refrigerant charge control 38GL2M12G 38GL2M18G - 38GL2M24G 38GL3M21G Outdoor unit Circuit A compressor Circuit B compressor Outdoor unit coil Filter Expansion device (Capillary) Expansion device (Accurater) Distributor Solenoid valve Service valve Indoor unit coil A1... -
Page 14: Unit Maintenance
38GL_M…G R-410A Check the refrigerant charge and unit maintenance E N G L I S H Refrigerant charge control 38GL4M24G Outdoor unit Circuit A compressor Circuit B compressor Outdoor unit coil Filter Expansion device (Capillary) Expansion device (Accurater) Distributor Solenoid valve Service valve Indoor unit coil A1 Indoor unit coil A2... -
Page 15: Troubleshooting
38GL_M…G R-410A Troubleshooting, guide for the owner and accessories Troubleshooting Discharge pressure too low: • Refrigerant charge too low; add refrigerant. Compressor and fan of the outdoor unit will not start: • Compressor valves broken; replace compressor. • Unit not energized; check the mains power connections. •... - Page 16 L010124H50 - 0202 Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1 The manufacturer reserves the right to change any product specifications without notice. Order No. 13816-74M10, February 2002. Supersedes Order No. 13816-74M10, April 2001. Printed in Italy...
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