Y-TG, R-410A ZJ/ZR/ZF Series 15-25 ton, 60 Hertz - Usair-eng.com
Y-TG, R-410A ZJ/ZR/ZF Series 15-25 ton, 60 Hertz - Usair-eng.com
Y-TG, R-410A ZJ/ZR/ZF Series 15-25 ton, 60 Hertz - Usair-eng.com
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<strong>25</strong>1934-Y<strong>TG</strong>-I-1008Drive Selection1. Determine side or bottom supply duct application.2. Determine desired airflow3. Calculate or measure the amount of external static pressure.4. Using the operating point determined from steps 1, 2 & 3, locate this point on the appropriate supply air blower performancetable. (Linear interpolation may be necessary.)5. Noting the RPM and BHP from step 4, locate the appropriate motor and/or drive on the RPM selection table.6. Review the BHP <strong>com</strong>pared to the motor options available. Select the appropriate motor and/or drive.7. Review the RPM range for the motor options available. Select the appropriate drive if multiple drives are available for thechosen motor.8. Determine turns open to obtain the desired operation point.Example1. 6800 CFM2. 2.0 iwg3. Using the supply air blower performance table below, the following data point was located: 1020 RPM & 5.92 BHP.4. Using the RPM selection table below, Size X and Model Y is found.5. 5.92 BHP exceeds the maximum continuous BHP rating of the 5.0 HP motor. The 7.5 HP motor is required.6. 1020 RPM is within the range of the 7.5 HP drives.7. Using the 7.5 HP motor and drive, 3.5 turns open will achieve 1020 RPM.Example Supply Air Blower PerformanceAir Flow(CFM)Available External Static Pressure - IWG0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHPStandard5 HP & FieldSuppliedDriveStandard 5 HP & DriveHigh Static 7.5 HP & Drive6400 719 2.55 756 3.03 792 3.49 828 3.92 864 4.32 899 4.67 933 4.98 966 5.24 998 5.45 1028 5.59 1056 5.67 1083 5.686800 742 3.02 778 3.51 814 3.97 850 4.40 886 4.79 921 5.<strong>15</strong> 955 5.46 988 5.72 1020 5.92 1050 6.07 1078 6.<strong>15</strong> 1105 6.167200 765 3.54 802 4.03 838 4.49 874 4.92 910 5.32 945 5.67 979 5.98 1012 6.24 1044 6.44 1074 6.59 1102 6.67 1129 6.687<strong>60</strong>0 790 4.11 827 4.<strong>60</strong> 863 5.06 899 5.49 935 5.88 970 6.24 1004 6.55 1037 6.81 1069 7.01 1099 7.16 1127 7.24 1<strong>15</strong>4 7.<strong>25</strong>7.5 HP & FieldSupplied DriveTable X: RPM SelectionSize(Tons)XModelYHPMax Motor Blower 6 Turns 5 Turns 4 Turns 3 Turns 2 Turns 1 Turn FullyBHP Sheave Sheave Open Open Open Open Open Open Closed5 5.75 1VP<strong>60</strong> BK110 730 765 800 835 870 905 N/A7.5 8.63 1VP<strong>60</strong> BK090 905 950 990 1035 1075 1120 N/A66 Johnson Controls Unitary Products
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