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STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. <br /> 1 1/2 Ton Heat Pump 2 Ton Heat Pump <br /> SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) <br /> F F <br /> LL 50 Add 1° 4° LL 50 1° Add 2° <br /> 40 Add 1° Add 2° Zi 40 Add 1° <br /> Lu <br /> Z 30 1° Z 30 Add 1° <br /> J J <br /> z 25 Use Design Subcooling 1° F-- <br /> 25 Use Design Subcooling <br /> 0< 15 Add 1° < 15 <br /> 10 10 <br /> Lu <br /> 20 30 40 50 60 70 80 90 100 110 120 130 140 150 20 30 40 50 60 70 80 90 100 110 120 130 140 150 <br /> TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] <br /> 2 1/2 Ton Heat Pump 3 Ton Heat Pump <br /> SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) <br /> F F <br /> LL LL <br /> LL 50 1° Add 2° LL 50 4° <br /> 40 Add 1° Zi 40 Add 1° Add 2° <br /> z 30 Add 1° z 30 Add 1° <br /> J J <br /> z 25 Use Design Subcooling z 25 Use Design Subcooling <br /> 15 1° 15 1° <br /> 0 10 10 <br /> Lu 0 2 0 <br /> 20 30 40 50 60 70 80 90 100 110 120 130 140 150 20 30 40 50 60 70 80 90 100 110 120 130 140 150 <br /> TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] <br /> 3 1/2 Ton Heat Pump 4 Ton Heat Pump <br /> _ SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) _ SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) <br /> 50 Add 4° 50 1° Add 4° <br /> 40 Add 1° Zi 40 1° <br /> z 30 Add 1° Add 2° z 30 Add 2° <br /> J J <br /> z 25 Use Design Subcooling z 25 Use Design Subcooling <br /> a< 15 Add 1° < 15 Add 1° <br /> L 10 L 10 <br /> LL 0 LL 0 <br /> Lu 20 30 40 50 60 70 80 90 100 110 120 130 140 150 20 30 40 50 60 70 80 90 100 110 120 130 140 150 <br /> TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] <br /> 5 Ton Heat Pump <br /> = ° <br /> LL SUBCOOL CHARGING CHART CORRECTIONS TABLE(FOR LINE LENGTH AND RISE) Design Subcooling Value F(from nameplate or Service Facts) <br /> 50 1° Add 4° <br /> 40 1° Subcooling Correction = ° F <br /> z 30 Add 2° <br /> J <br /> z 25 Use Design Subcooling Add 1° <br /> W 15 <br /> Lu 10 Add 1° <br /> 0 1° Final Subcooling Value = ° F <br /> w 20 30 40 50 60 70 80 90 100 110 120 130 140 150 <br /> TOTAL REFRIGERANT LINE LENGTH(FT)-[includes lift] <br /> STEP 3 - Stabilize the system by operating for a <br /> minimum of 20 minutes. <br /> At startup, or whenever charge is removed or <br /> added, the system must be operated for a mini- 20 MIN. <br /> mum of 20 minutes to stabilize before accurate <br /> measurements can be made. <br /> 18 18-BC108D1-1 B-EN <br />