![](/images/new-backgrounds/1057769/5776929x1.webp)
Installation
Supply fan adjustment
Use the following procedure to determine the proper adjustment of the supply fan for a specific application.
1.Determine total external static pressure about system and accessories.
a.Obtain the design airflow rate and the design external static pressure drop through the distribution system.
b. Add static pressure drop of the accessories installed on the unit. (Table 7,8 & 9)
c. Add the total accessory static pressure drop (from step 1b) to the design external static pressure (from step 1a).The sum of these two values is the total system external static pressure.
2.Using the Tables 10 through 20 to find the external static pressure that most closely approximates total system external static pressure. Then locate the appropriate airflow rate for your unit. The value obtained represents the brake horsepower for the supply fan motor and the fan RPM.
3.Adjust motor sheave according to Table 6.
Table 6 - Motor sheave / Fan speed
Fan Speed (RPM)
Standard Drive
| 6 turns | 5 turns | 4 turns | 3 turns | 2 turns | 1 turns |
|
UNIT | Open | Open | Open | Open | Open | Open | Closed |
|
|
|
|
|
|
|
|
YKD/YKH 155 | 566 | 601 | 637 | 672 | 708 | 743 | N/A |
YKD/YKH 175 | 724 | 769 | 815 | 860 | 906 | 951 | N/A |
YKD/YKH 200 | 513 | 550 | 586 | 623 | 659 | 696 | N/A |
YKD/YKH 250 | 588 | 619 | 650 | 681 | 712 | 743 | N/A |
|
|
|
|
|
|
|
|
TKD/TKH 155 | 566 | 601 | 637 | 672 | 708 | 743 | N/A |
TKD/TKH 175 | 724 | 769 | 815 | 860 | 906 | 951 | N/A |
TKD/TKH 200 | 513 | 550 | 586 | 623 | 659 | 696 | N/A |
TKD/TKH 250 | 588 | 619 | 650 | 681 | 712 | 743 | N/A |
|
|
|
|
|
|
|
|
WKD/WKH 125 | 533 | 566 | 600 | 633 | 667 | 700 | N/A |
WKD/WKH 155 | 566 | 601 | 637 | 672 | 708 | 743 | N/A |
WKD/WKH 200 | 513 | 550 | 586 | 623 | 659 | 696 | N/A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Fan Speed (RPM) |
|
|
|
|
|
|
| Oversized Drive |
|
|
|
|
|
|
|
|
|
|
|
| 6 turns | 5 turns | 4 turns | 3 turns | 2 turns | 1 turns |
|
UNIT | Open | Open | Open | Open | Open | Open | Closed |
|
|
|
|
|
|
|
|
YKD/YKH 155 | 672 | 714 | 756 | 798 | 840 | 882 | N/A |
YKD/YKH 175 | 791 | 840 | 890 | 939 | 989 | 1038 | N/A |
YKD/YKH 200 | 680 | 711 | 742 | 773 | 804 | 835 | N/A |
YKD/YKH 250 | 690 | 722 | 754 | 786 | 818 | 850 | N/A |
|
|
|
|
|
|
|
|
TKD/TKH 155 | 672 | 714 | 756 | 798 | 840 | 882 | N/A |
TKD/TKH 175 | 791 | 840 | 890 | 939 | 989 | 1038 | N/A |
TKD/TKH 200 | 680 | 711 | 742 | 773 | 804 | 835 | N/A |
TKD/TKH 250 | 690 | 722 | 754 | 786 | 818 | 850 | N/A |
|
|
|
|
|
|
|
|
WKD/WKH 125 | 724 | 769 | 815 | 860 | 906 | 951 | N/A |
WKD/WKH 155 | 513 | 550 | 586 | 623 | 659 | 696 | N/A |
WKD/WKH 200 | 588 | 619 | 650 | 681 | 712 | 743 | N/A |
|
|
|
|
|
|
|
|
15 |