88
RT-SVX34R-EN
Table 62. 27.5 - 35 Ton horizontal economizer (O/A) -
ultra-low-leak economizer (continued)
Sys-
tem
De-
sign
CFM
Return Air Duct Static + Return Air Damper
Static (in WC)
0.2-
0
0.4-
0
0.6-
0
0.8-
0
1.0-
0
1.2-
0
1.4-
0
stroke limit setting % on OA damper
actuator
11500 100 80 50 45 40 40 40
12000 100 100 60 45 40 40 40
12500 100 100 60 50 45 40 40
13000 100 100 60 50 45 40 40
13500 100 100 70 50 45 45 40
14000 100 100 70 60 50 45 40
14500 100 100 80 60 50 45 45
Table 63. 40 - 50 Ton downflow economizer (O/A) -
ultra-low-leak economizer
Sys-
tem
De-
sign
CFM
Return Air Duct Static + Return Air Damper
Static (in WC)
0.2-
0
0.4-
0
0.6-
0
0.8-
0
1.0-
0
1.2-
0
1.4-
0
stroke limit setting % on OA damper
actuator
12000 100 100 65 60 55 55 55
12500 100 100 65 60 60 55 55
13000 100 100 75 65 60 55 55
13500 100 100 75 65 60 60 55
14000 100 100 75 65 65 60 55
14500 100 100 75 75 65 60 60
15000 100 100 100 75 65 60 60
15500 100 100 100 75 65 60 60
16000 100 100 100 75 65 65 60
16500 100 100 100 75 75 65 60
17000 100 100 100 75 75 65 65
17500 100 100 100 100 75 65 65
18000 100 100 100 100 75 65 65
18500 100 100 100 100 75 75 65
19000 100 100 100 100 75 75 65
19500 100 100 100 100 75 75 75
20000 100 100 100 100 100 75 75
Table 64. 40 - 50 Ton horizontal economizer (O/A) -
ultra-low-leak economizer
Sys-
tem
De-
sign
CFM
Return Air Duct Static + Return Air Damper
Static (in WC)
0.2-
0
0.4-
0
0.6-
0
0.8-
0
1.0-
0
1.2-
0
1.4-
0
stroke limit setting % on OA damper
actuator
12000 100 80 50 45 40 40 40
12500 100 80 60 50 45 40 40
13000 100 100 60 50 45 40 40
13500 100 100 60 50 45 40 40
14000 100 100 70 50 45 45 40
14500 100 100 70 60 50 45 45
15000 100 100 80 60 50 45 45
15500 100 100 80 60 50 50 45
16000 100 100 100 70 60 50 45
16500 100 100 100 70 60 50 45
17000 100 100 100 80 60 50 50
17500 100 100 100 80 60 50 50
18000 100 100 100 80 70 60 50
18500 100 100 100 100 70 60 50
19000 100 100 100 100 80 60 50
19500 100 100 100 100 80 70 50
20000 100 100 100 100 80 70 60
Manual Outside Air Damper
Units ordered with the 25% manual outside air option
have two slidable dampers. By adjusting one or both,
the desired amount of fresh air entering the system can
be obtained.
To adjust the outside air damper;
1. Turn the “System” selection switch to the “Off”
position and the “Fan” selection switch (if
applicable) to the “Auto” position.
2. Close the disconnect switch or circuit protector
switch that provides the supply power to the unit's
power terminal block or the unit factory mounted
disconnect switch.
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