Economizer Damper Adjustment - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

Unit Start Up
Table 47. Return fan performance—60, 70, 75 tons AC; 73, 80, 89 tons EC (36.5" fan)
CFM
Std. 0.25
Air RPM BHP RPM
12000 459 1.07 502
13000 490 1.27 530
14000 520 1.49 560
15000 552 1.73 590
16000 583 2.00 619
17000 615 2.30 650
18000 646 2.64 680
19000 678 3.01 711
20000 711 3.42 742
21000 743 3.87 773
22000 775 4.36 805
23000 808 4.89 836
24000 840 5.46 868
25000 873 6.08 900
26000 906 6.75 931
27000 939 7.47 963
Notes:
1. Max fan RPM 1151 for 36.5" Class I Fan
2. Max motor available 20 HP for 36.5" fan size
3. Max motor available 20 HP for 60, 70 & 75T/ 73, 80 & 89T
4. Max CFM is 27000 for 60, 70 & 75T/ 73, 80 & 89T
5. Min CFM is 12000 for 60, 70 & 75T/ 73, 80 & 89T
6. Return fan belt drive RPM selections will be available to cover 500-1100 RPM range +/- 50 RPM
7. Performance data includes cabinet and rain hood effect. Damper pressure drop will have to be added to return duct static per table

Economizer Damper Adjustment

Exhaust Air Dampers
Verify that the exhaust dampers (if equipped) close tightly when the unit is off. Adjust the damper
linkage as necessary to ensure proper closure. An access panel is provided under each damper
assembly.
Fresh Air & Return Air Damper Operation
The fresh air and return air damper linkage is accessible from the filter section of the unit. The
damper linkage connecting the fresh air dampers to the return air dampers is preset from the
factory in the number 1 position. Refer to
and operating airflow (CFM).
No Step Surface!
Do not walk on the sheet metal drain pan. Walking on the drain pan could cause the
supporting metal to collapse, resulting in the operator/technician to fall. Failure to follow this
recommendation could result in death or serious injury.
Note: Bridging between the unit's main supports may consist of multiple 2 by 12 boards or sheet
Arbitrarily adjusting the fresh air dampers to open fully when the return air dampers are closed or;
failing to maintain the return air pressure drop with the fresh air dampers when the return air
132
Negative Static Pressure
0.50 0.75
BHP RPM BHP RPM
1.59 541 2.13
1.83 567 2.40
2.09 595 2.70
2.38 623 3.03
2.70 652 3.39
3.05 681 3.78
3.43 711 4.20
3.85 741 4.67
4.30 771 5.17
4.78 801 5.70
5.31 832 6.28
5.88 863 6.90
6.49 894 7.56
7.15 925 8.26
7.86 956 9.00
8.62 987 9.79 1010
metal grating.
1.00 1.25
BHP RPM BHP
578 2.71 613 3.31
603 3.01 636 3.65
628 3.34 660 3.99
655 3.70 686 4.39
682 4.09 712 4.82
710 4.52 739 5.28
739 4.98 766 5.78
768 5.48 794 6.31
797 6.02 823 6.90
827 6.60 852 7.51
857 7.22 881 8.17
887 7.89 911 8.88
918 8.60 941 9.63
948 9.35 970 10.42
979 10.16 1001 11.28
11.01 1031 12.18
Table 48 for the appropriate linkage position for the unit
WARNING
1.50 1.75
RPM BHP RPM BHP
647 3.91 681 4.54
668 4.29 700 4.94
691 4.69 721 5.38
715 5.11 744 5.85
740 5.57 767 6.34
766 6.06 792 6.85
792 6.60 817 7.41
819 7.16 844 8.03
847 7.77 871 8.66
875 8.41 898 9.36
904 9.11 926 10.09
933 9.87 954 10.86
962 10.67 983 11.71
992 11.49 1012 12.59
1021 12.37 1041 13.49
1052 13.33 1071 14.47
2.00
RPM BHP
713 5.20
731 5.64
751 6.10
771 6.59
794 7.14
818 7.67
842 8.27
867 8.89
894 9.59
920 10.30
947 11.06
975 11.88
1004 12.75
1032 13.67
1061 14.63
1090 15.65
Table 40, p. 126
RT-SVX36G-EN