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RT-PRC001-EN34
*Indicates both downflow and horizontal units.
Performance
Data
(20 Ton)
Standard Efficiency
Factory supplied motors, in commercial equipment, are
definite purpose motors, specifically designed and tested to
operate reliably and continuously at all cataloged conditions.
Using the full horsepower range of our fan motors as shown
in our tabular data will not result in nuisance tripping or
premature motor failure. Our product’s warranty will not be
affected.
For Standard Evaporator Fan Speed (RPM), reference Table PD-31.
For Standard Motor and High Static Drive Accessory/Fan Speed (RPM),reference Table PD-32.
For Oversize Evaporator Fan Speed (RPM), reference Table PD-33.
Fan motor heat (MBH) = 3.15 x Fan Bhp.
Data includes pressure Drop Due to West Coils and Filters.
No accessories or options are included in pressure drop data.
Refer to Table PD-36 to determine add’l static pressure drop due to other options/accessories
Notes:
1. Field Supplied Fan Sheave BK190 Required. Field Supplied Belt may be necessary.
2. 7.5 HP Oversize Motor with Field Supplied Motor Sheave 1VP50 Required. Field
Supplied Belt may be necessary.
3. For 380V/60 Hz units, the oversized motor is used as the standard motor, Refer to
“Motor and Sheave/Fan Speed” tables to determine operating range.
Table PD-20 — Evaporator Fan Performance — 20 Ton— YC*240B — Continued
External Static Pressure (Inches of Water)
1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00
CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5 HP Standard Motor & Drive 5 HP Standard Motor & High Static Drive Accessory
6400 758 3.4 781 3.64 804 3.85 827 4.07 848 4.29 869 4.51 890 4.73 910 4.97 929 5.21 949 5.45
7200 792 4.24 813 4.46 834 4.68 854 4.90 875 5.13 895 5.37 916 5.62 936 5.86 955 6.11 973 6.35
8000 830 5.18 850 5.42 869 5.66 888 5.91 907 6.16 925 6.40 944 6.65 962 6.90 981 7.16 1000 7.44
8800 873 6.34 890 6.58 908 6.82 925 7.08 943 7.34 961 7.61 978 7.88 995 8.16 — — — —
9600 919 7.73 935 7.97 951 8.21 967 8.46 — — — — ————————
7.5 HP Oversized Motor & Drive
Table PD-20 — Evaporator Fan Performance — 20 Ton — YC*240B
External Static Pressure (Inches of Water)
.10 .20 .30 .40 .50 .60 .70 .80 .90 1.00
CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
5 HP Standard Motor & Field Supplied Low Static Drive (1) 5 HP Standard Motor & Drive
6400 511 1.56 538 1.72 564 1.99 590 2.16 615 2.31 639 2.47 663 2.65 688 2.84 711 3.04 735 3.23
7200 555 2.25 587 2.46 614 2.67 640 2.88 663 3.06 685 3.23 706 3.41 728 3.60 749 3.80 771 4.01
8000 609 3.03 639 3.26 665 3.50 690 3.73 712 3.96 733 4.16 753 4.35 772 4.55 792 4.75 811 4.96
8800 664 3.98 692 4.23 717 4.49 740 4.75 762 5.01 782 5.25 801 5.48 820 5.69 838 5.90 855 6.12
9600 719 5.11 745 5.38 770 5.66 792 5.94 813 6.23 832 6.51 851 6.78 869 7.03 886 7.27 902 7.50
(2) 7.5 HP Oversized Motor & Drive