York Sun Select YV28, Manual

Page: 79 / 110

Table 58: Belt tension
Belt tension
Size Motor-Static
Deflection
force (lb)
Deflection
distance (in.)
Max PRM
7.5HP - STD 5.78 0.4
10HP - MED 4.48 0.4 YV28
15HP - HIGH 5.72 0.4
1100
7.5HP - STD 5.9 0.4
10HP - MED 6.91 0.4 YV30
15HP - HIGH 5.93 0.4
1100
7.5HP - STD 5.78 0.4
10HP - MED 4.48 0.4 YV35
15HP - HIGH 5.72 0.4
1150
10HP - STD 7.42 0.4
15HP - MED 8.85 0.4 YV40
20HP - HIGH 7.23 0.4
1150
10HP - STD 7.42 0.4
15HP - MED 8.85 0.4 YV50
20HP - HIGH 7.23 0.4
1150
Drive selection
1. Determine the required airflow.
2. Calculate or measure the amount of external
static pressure.
3. With the operating point determined from
the previous steps, locate this point on the
appropriate supply air blower performance
table. Linear interpolation may be necessary.
4. Note the RPM and BHP from the previous
step and locate the appropriate motor and/or
drive.
5. Review the BHP compared to the motor
options available. Select the appropriate
motor and/or drive.
6. Review the RPM range for the motor options
available. Select the appropriate drive if
multiple drives are available for the chosen
motor.
7. Determine the turns open to obtain the
required operation point.
Example
1. 9000 CFM
2. 1.2 IWG
3. Using the supply air blower performance table
below, the following data point was located:
810 RPM and 4.82 BHP.
4. Using the following RPM selection table, Size X
and Model Y is found.
5. 4.82 BHP does not exceed the maximum
continuous BHP rating of any of the three
motor options, so all three motors are still
eligible for selection.
6. 810 RPM falls within the range of the 7.5-HP
drive.
7. Using the 7.5-HP motor, 2.5 turns open
achieves 810 RPM.
Table 59: Example supply air blower performance
Available external static pressure - IWG
0.3 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.5
Air flow
(CFM)
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
Standard 7.5HP and field drive Standard 7.5HP and drive Medium 10HP and drive High 20 HP and drive
8000 573 2.29 599 2.53 649 2.98 696 3.39 742 3.78 786 4.16 828 4.55 869 4.95 910 5.36 949 5.79 988 6.25 1026 6.75 1045 7.00
9000 606 2.92 631 3.15 678 3.59 724 4.01 768 4.41 810 4.82 851 5.24 892 5.67 931 6.13 970 6.60 1007 7.12 1045 7.66 1063 7.95
10000 642 3.62 665 3.85 711 4.29 754 4.72 796 5.15 837 5.58 877 6.04 916 6.51 955 7.00 992 7.53 1029 8.09 1066 8.69 1084 9.01
11000 680 4.41 702 4.64 745 5.09 787 5.54 827 6.00 867 6.47 906 6.96 943 7.47 981 8.01 1017 8.59 1054 9.21 1089 9.87 1107 10.21
12000 721 5.31 741 5.55 782 6.02 822 6.50 861 6.99 899 7.49 936 8.02 973 8.58 1009 9.18 1045 9.81 1080 10.49 1115 11.21 1132 11.58
13000 763 6.36 783 6.60 822 7.10 860 7.61 897 8.14 933 8.69 969 9.26 1005 9.88 1040 10.52 1075 11.22 1109 11.95 1143 12.74 - -
Note: Blower performance includes gas heat exchangers and 2-in. filters. See the Static resistance
table for additional applications. See the RPM selection table to determine the required motor sheave
setting and to determine the maximum continuous BHP. kW = BHP x 0.93
Table 60: Example RPM selection
Model HP Max BHP
Motor
sheave
Blower
sheave
6 turns open 5 turns open 4 turns open 3 turns open 2 turns open 1 turn open Fully closed
7.5 8.24 1VP65 - 1 3/8 1B5V124 717 745 772 800 827 855 882
10 10.90 2VP60- 1 3/8 2B5V94 848 884 920 956 992 1028 1064 YV28
15 16.13 2VP60- 1 5/8 2B5V86 945 985 1026 1066 1106 1147 n/a
Installation Manual: YORK
®
Sun™ Select YV28 to YV50
79
Johnson Controls Ducted Systems