Trane Voyager Commercial Installation & Operation Manual page 76

Startup
2. To determine the actual CFM (within + 5%), plot the fan's operating RPM and the Theoretical
Theoretical BHP Formula:
Where the two points intersect, read straight down to the CFM line. Use
new fan drive if the CFM is not within specifications.
Table 30. Supply Fan Performance—27½-35 Ton—60 Hz
0.25
CFM Std.
Air RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM
8000 308 1.17 372
8500 317 1.33 381
9000 326 1.51 391
9500 337 1.72 401
10000 349 1.96 411
10500 363 2.22 421
11000 376 2.52 430
11500 390 2.83 438
12000 404 3.18 447
12500 417 3.55 457
13000 431 3.95 468
13500 445 4.39 479
14000 459 4.85 490
14500 473 5.35 503
Total Static Pressure (in.
2.50
CFM Std.
Air RPM BHP RPM BHP RPM BHP
8000 738 6.48 773
8500 739 6.82 774
9000 740 7.16 775
9500 740 7.48 776
10000 742 7.86 777
10500 742 8.20 777
11000 741 8.56 777
11500 743 8.95 777
12000 747 9.43 780
12500 750 9.90 783
13000 755 10.45 786
13500 760 11.04 790
14000 768 11.79 795
14500 778 12.59 803
Notes:
1. Supply fan performance table includes internal resistance of rooftop. For total static pressure determination, system external static must be added to
appropriate component static pressure drops, (evaporator coil, filters, optional economizer, optional heating system, optional roof curb).
2. The pressure drop from the supply fan to the space cannot exceed 2.25".
3. Maximum air flow for 27½ ton — 12,100 cfm, 30 ton — 13,200 cfm, 35 ton — 14,400 cfm.
4. Maximum motor horsepower for 27½ ton — 10 hp, 30 ton — 10 hp, 35 ton — 15 hp.
76
BHP onto the appropriate Fan Performance Curve in
Actual Motor Amps
----------------------------- ------------------------------------------ -
Motor Nameplate Amps
Total Static Pressure (in.
0.50 0.75 1.00
1.62 427 2.09 475
1.82 436 2.33 480
2.04 443 2.55 489
2.28 451 2.80 498
2.54 459 3.09 506
2.82 468 3.40 513
3.11 479 3.74 521
3.41 489 4.10 530
3.74 499 4.48 538
4.10 509 4.88 549
4.50 518 5.30 559
4.92 526 5.73 569
5.39 535 6.19 579
5.90 544 6.68 588
wg)1
2.75 3.00
7.18 805 7.88
7.54 807 8.28
7.92 809 8.70
8.30 810 9.12
8.68 812 9.54
9.05 812 9.94
9.43 812 10.35
9.83 812 10.78
10.30 812 11.21
10.79 814 11.70
11.30 817 12.22
11.88 821 12.81
12.52 824 13.39
13.30 829 14.10
Motor HP
=
wg)1
1.25 1.50
2.55 525 3.11 574 3.75
2.77 528 3.34 574 3.97
3.08 532 3.58 577 4.22
3.39 537 3.87 580 4.50
3.69 545 4.25 584 4.81
3.98 555 4.65 589 5.17
4.33 563 5.03 598 5.63
4.72 570 5.38 607 6.11
5.13 578 5.79 615 6.56
5.58 586 6.24 623 7.00
6.04 594 6.73 630 7.45
6.53 604 7.26 638 7.98
7.04 614 7.81 647 8.56
7.59 624 8.40 656 9.18
Figure 43, p. 78 and Figure 44, p.
Theoretical BHP
Table 38, p. 87
1.75 2.00
BHP
620 4.42 661 5.09
620 4.66 662 5.36
620 4.91 663 5.64
621 5.18 663 5.93
624 5.48 664 6.23
628 5.84 666 6.56
633 6.22 670 6.95
639 6.68 674 7.37
648 7.22 679 7.83
657 7.78 687 8.42
665 8.30 696 9.04
673 8.82 705 9.68
680 9.35 713 10.26
688 9.96 720 10.86
78.
to select a
2.25
RPM BHP
701 5.77
702 6.08
703 6.40
703 6.70
703 7.02
703 7.34
706 7.73
709 8.14
713 8.59
718 9.10
724 9.69
733 10.38
742 11.09
751 11.78
RT-SVX34C-EN