Carrier RAV-SP180UT-UL Installation Manual

Also see for RAV-SP180UT-UL: Service manual

– 16 –4-way Air Discharge Cassette Type Installation ManualEN6 REFRIGERANT PIPING AND EVACUATING Refrigerant Piping1. If the outdoor units are to be mounted on a wall,make sure that the supporting platform is sufficientlystrong. The platform should be designed andmanufactured to maintain its strength over a longperiod of time, and sufficient consideration shouldbe given to ensuring that the outdoor unit will not fall.2. Use copper pipe with 0.03" (0.8 mm) or morethickness. (In case pipe size is Ø5/8" (15.9 mm), with0.04" (1.0 mm) or more.)3. Flare nut and flare works are also different fromthose of the conventional refrigerant.Take out the flare nut attached to the main unit of theair conditioner, and use it.REQUIREMENTWhen the refrigerant pipe is long, provide supportbrackets at intervals of 8’2” - 9’10” (2.5 - 3 m) to clampthe refrigerant pipe. Otherwise, abnormal sound maybe generated.CAUTIONIMPORTANT 4 POINTS FOR PIPING WORK1. Remove dust and moisture from the inside of theconnecting pipes.2. Tight connection (between pipes and unit)3. Evacuate the air in the connecting pipes usingVACUUM PUMP.4. Check the gas leakage. (Connected points) Pipe size Permissible Piping Lengthand Height DifferenceThey vary according to the outdoor unit.For details, refer to the Installation Manual attached tothe outdoor unit.Flaring• Cut the pipe with a pipe cutter.Remove burrs completely.Remaining burrs may cause gas leakage.• Insert a flare nut into the pipe, and flare the pipe.As the flaring sizes of R410A differ from those ofrefrigerant R22, the flare tools newly manufacturedfor R410A are recommended.However, the conventionaltools can be used by adjustingprojection margin of thecopper pipe.▼ Projection margin inflaring : B (Unit : in (mm))Rigid (Clutch type)▼ Flaring dia. meter size : A (Unit : in (mm))* In case of flaring for R410A with theconventional flare tool, pull it out approx.0.02" (0.5 mm) more than that for R22 toadjust to the specified flare size.The copper pipe gauge is useful foradjusting projection margin size.Tightening connectionCAUTION• Do not apply excessive torque. Otherwise, the nutmay crack depending on the conditions.Modelname RAV- SP180typeSP240, SP300,SP360, SP420typePipe sizeGas side 1/2"(12.7 mm)5/8"(15.9 mm)Liquid side 1/4"(6.4 mm)3/8"(9.5 mm)Outer dia. of copperpipeR410A toolusedConventionaltool usedR410A R410A1/4” (6.4), 3/8” (9.5) 0 - 0.02”(0 - 0.5)0.06” - 0.08”(1.5 - 2.0)1/2” (12.7), 5/8” (15.9) 0.08” - 0.1”(2.0 - 2.5)Outer dia. of copperpipeAR410A1/4” (6.4) 0.36” (9.1)3/8” (9.5) 0.52” (13.2)1/2” (12.7) 0.65” (16.6)5/8” (15.9) 0.78” (19.7)B+0-0,02"(–0,4)A16-EN