12Main pipe 1 size increasing ExamplesExample) 34 HPWith 1 bigger size, it can increase cooling capacity by 16.8 %.
13Selection the refrigerant pipe 1. 명기된 사양은 개발진행에 따라 변경 될 수 있습니다.2. 배관은 미주 지역에서 구입 가능한 배관으로 선정되어 있습니다.현지에서 구매가 불가능한 배관을 제외(1, 1 ¼, 1 ½ )하였기에, 배관 선정 사양이 기존의 DVM PLUS 2 대비 해서,변경될 소지가 있으니 참고 하시길 바랍니다.(위에 말씀 드린 것처럼 첨부된 문서의 설치 사양은 변경될 소지가 있습니다.)
14■ Definitions A1 Branched pipes from outdoor joints to outdoor A2 Outdoor unitA1Branched pipes from outdoor joints to outdoorA2Branched pipes between outdoor jointsA3Main PipesBranched pipes between branch jointsBCPipes to indoor unitsDOutdoor jointsE, FBranch joints (Indoor joints)
15■ Step 1 – Select pipes to outdoor units from ‘outdoor joints’ Piping Diameter for each Outdoor unit (A1)TonHPLiquidGasH.P. Gasmminch67.59.523/819.053/415.885/8810.022.237/81012.512.701/228.581 1/8A1Piping Diameter for between outdoor joints (A2)TonHPLiquidGasH.P. Gasmminch67.59.523/819.053/415.885/8810.022.237/81012.512.701/228.581 1/81215.01417.51620.01822.52025.034.931 3/82227.52430.02632.52835.03037.5■ Step 2 – Select pipesbetween outdoor jointsA2
17Main Pipe Diameter (A3) in case of the farthest indoor unit over 90m ■ Step 3 – Upsizing “Main” pipes, When?Main Pipe Diameter (A3)TonHPLiquidGasH.P. Gasmminch67.59.523/819.053/415.885/8810.022.237/81012.512.701/228.581 1/81215.01417.51620.01822.52025.034.931 3/82227.52430.02632.52835.03037.5Outdoor unitA3The farthest indoor unitMain Pipe Diameter (A3) in case of the farthest indoor unit over 90mTonHPLiquidGasH.P. Gasmminch67.512.701/222.237/819.053/4810.028.581 1/81012.515.885/81215.034.931 3/81417.51620.01822.52025.02227.52430.02632.52835.041.281 5/83037.5If the piping length between outdoor to the farthestindoor unit is over 90m (295ft), use right table.A3
18■ Step 4 – Select ‘Outdoor joints’ Model NameOutdoor unit’s capacityLiquid & low Pressure gas pipeMXJ-T3819K12 ~ 30 TonHigh Pressure gas pipeMXJ-T3100KD■ Step 5 – Select the first ‘Branch joints’Model NameOutdoor unit’s capacityLiquid & low Pressure gas pipe JointsMXJ-YA2512K6, 8,10 TonMXJ-YA2812K12 TonMXJ-YA2815K14,16,18,20 TonMXJ-YA3119K22, 24, 26, 28 TonMXJ-YA3819K30 TonHigh Pressure gas pipe JointsMXJ-YA1500K6 TonMXJ-YA2500K8, 10, 12, 16, 18 TonMXJ-YA3100K20, 22, 24, 26, 28, 30 TonE
22Additional refrigerant √ Additional refrigerant has to be charged according to the length and size of liquid pipe.Liquid pipe size (O.D. mm)Additional refrigerant charging (lbs/ft)Φ 1/4 (Φ 6.4)Φ 3/8 (Φ 9.5)Φ 1/2 (Φ 12.7)Φ 5/8 (Φ 15.9)Φ 3/4 (Φ 19.1)Φ 7/8 (Φ 22.2)MCUlbsEach MCU1.1Liquid line after expanding(From Sing EEV kits, or From MCUs)Each liquid line0.022
28Outdoor units piping ■ Refrigerant piping should be the same level or lower than connecting position.Correct piping workWrong piping workAccumulating of oil
29Outdoor units piping ■ Refrigerant piping should be connected with side direction.Correct piping workWrong piping workUnbalancing of Ref. & oil distributionRefrigerant can excessively leans to one direction.
30Refrigerant can excessively leans to one direction. Outdoor units piping ■ Refrigerant piping should be connected with side direction.Correct piping workWrong piping workRefrigerant can excessively leans to one direction.
31Outdoor units piping ■ Refrigerant piping should be installed in a horizontal direction.Correct piping workWrong piping workBe horizontalMin. 4 inch
32Outdoor units piping Vertical trap ■ Vertical trap Correct piping work Wrong piping work8 ~ 12 inch40 inch80 inchVertical trap80 inch
33 ■ Connecting the outdoor unit pipe Outdoor units piping ■ Connecting the outdoor unit pipeSingle installationModule installationFront connectionFront connectionOil valve size : 1/4 inchBottom connectionBottom connection
34Refnet Y Joint Installation Horizontally installedVertically installedVaporized refrigerant leans to upper direction in Y joint.For uniform refrigerant distribution
35Header joint installation Refnet Head Joint Installation Liquid head JointVaporized refrigerant leans to one of direction in branch joint.Header JointGas head JointDo not install vertically.
36Header joint installation Connect according to larger capacity of indoor unit in order
37Piping work Taping Nitrogen replacement before brazing Without nitrogen gas blowingWith nitrogen gas blowing
49conventional flare tool INSTALLATION TOOLS – Exclusive Use to R410AToolUsing reasonSpecificationManifold gaugeR410A is composed H-F-C as different as R22 is composed C-F-Cl.Don't use mineral oil when gauge pressure to prevent contamination.Only for R410A.High pressure gauge : -0.1~5.3㎫Low pressure gauge : -0.1~3.8㎫Connection port diameter : 5/16 flareNo oil usedManifoldcharginghoseChange in service port diameterR410A has high pressure as compared with R22.It should be made of materials are not affected a using refrigerant.Working pressure : 5.08㎫Bursting pressure : 25.4㎫Vacuum pumpR410A is used with a ploy ester oil but a vacuum pump uses a conventional mineral oil.The degree of vacuum is 5torr Need a check valve to prevent reverse oil flow if using a conventional vacuum pumpFlaring ToolNeed a flare gauge for R410A.When using a conventional flare tool, the pipe extension margin should be 1.0~1.5mm or 1.5~2.0.Torque spannersIncrease a connecting torque.*Adding a propertorque to the pipeusing R410A whenconnect pipes toflare nuts.RefrigerantoilCoat the connection with refrigerant oil film. If not, leakage is possible because of the pressure of R410A.Coat after flare work on pipe connection.All refrigerants are available as using a synthetic oilHigh rust resistanceLong stability over long period timeGasleak testerSince R410A don't have chlorine, the tester must can detect Hydrogen.R410A,R407C(E),R404A,R507A,R134a,R12,R22,R502,R500 are detected.Available in the range of 0 to 40℃.DA(㎜)flare tool fit on R410Aconventional flare toolclutch typewing nut type6.350~0.51.0~1.51.5~2.09.5212.7015.88nominal dimensionTorque (N·m)6.3514.2~17.29.5232.7~39.912.7049.5~60.315.8861.8~75.4