Vertiv Liebert DSE, System Design And User Manual, Page: 18 / 120

3.2 Physical Data
Model Size DA250, Downflow, Horizontal Discharge
EVAPORATOR COIL- Copper Tube/Aluminum Fin
Face Area, sq. ft. (sq. m) 67.5 (6.27)
Rows of Coil 4
Face Velocity, FPM (m/s), Std. Air Volume
520 ft/min (158.5 m/s) based on 35,000 CFM (5946 CMH)
540 ft/min (165 m/s) based on 36,500 CFM (62,013 CMH)
622 ft/min (189 m/s) based on 42,000 CFM (71,358 CMH)
FILTER SECTION - Disposable Type - Nominal Sizes and Quantities
Nominal Size, inches 28 x 22 x 4
Quantity 15
UNIT PIPING CONNECTION SIZES (not external line sizes)
Condensate Drain
w/opt Condensate Pump, OD
1/2-in. O.D. Cu
Condensate Drain, FTP 3/4 in.
Liquid Line, O.D. Cu 1-3/8 in. O.D. Cu
Hot Gas Line, O.D. Cu 1-5/8 in. O.D. Cu
Table 3.3 Physical data for 60/50-Hz models
Air flow* at 0.1 in. (25 Pa) ESP Air-flow calibration voltage
CFM CMH 60 Hz 50 Hz
25,000 42480 4.66 5.57
26,000 44179 4.83 5.78
27,000 45878 5.00 5.98
28,000 47578 5.17 6.19
29,000 49277 5.34 6.39
30,000 50976 5.52 6.60
31,000 52675 5.69 6.81
32,000 54374 5.86 7.01
33,000 56074 6.03 7.22
34,000 57773 6.20 7.42
35,000 59472 6.38 7.63
36,000 61171 6.55 7.83
37,000 62870 6.72 8.04
38,000 64570 6.89 8.24
39,000 66269 7.06 8.45
Table 3.4 Air-flow Calibration Voltage
Vertiv | Liebert® DSE™ System Design and User Guide
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