Vertiv Liebert DSE, System Design And User Manual

Page: 17 / 120

3 SYSTEM DATA
3.1 Capacity and Performance Data
Air-side
∆ T
Supply-air
Temperature
Return-air
Temperature
Outdoor
Temperature
Air flow
6
Net Sensible
Capacity
Input
Power
SCOP
°F °F °C °F °C °F °C CFM CMH kW kBtu/hr kW –
20
70 21 90 32 95 35 40,500 68,810 248.4 848 97 2.6
74 23 94 34 95 35 43,000 73,057 259.7 886 101.5 2.6
25
70 21 95 35 95 35 34,000 57,766 258.5 882 88.3 2.9
74 23 99 37 95 35 36,000 61,164 272 928 91.8 3
1. Total Cooling Capacity is not shown because the DA250 is 100% sensible.
2. Capacity data is rated and factory certified per ASHRAE 127-2007 with a 5% tolerance.
3. For downflow, bottom-discharge options, consult the factory.
4. Quantity of Fans is 3, External Static pressure 0.1 in. and Dewpoint of 52.3°F.
5. For return-air temperatures outside the range shown, please consult factory.
6. Maximum air-flow calibration voltage must be adjusted based on the required air flow. See Table 3.4 on the next page,
for values.
Table 3.1 Capacity data for 60-Hz, Downflow, horizontal-discharge models
Air-side
∆
T
Supply-air
Temperature
Return-air
Temperature
Outdoor
Temperature
Air flow
6
Net Sensible
Capacity
Input
Power
SCOP
°F °F °C °F °C °F °C CFM CMH kW kBtu/hr kW –
20
70 21 90 32 95 35 36,000 61,165 220 751 74.1 3.0
74 23 94 34 95 35 38,000 64,560 231 788 77.4 3.0
25
70 21 95 35 95 35 30,600 52,000 232 792 68.0 3.4
74 23 99 37 95 35 32,500 55,225 243 829 70.5 3.5
1. Total Cooling Capacity is not shown because the DA250 is 100% sensible.
2. Capacity data is rated and factory certified per ASHRAE 127-2007 with a 5% tolerance.
3. For downflow, bottom-discharge options, consult the factory.
4. Quantity of Fans is 3, External Static pressure 0.1 in. and Dewpoint of 52.3°F.
5. For return-air temperatures outside the range shown, please consult factory.
6. Maximum air-flow calibration voltage must be adjusted based on the required air flow. See Table 3.4 on the next page,
for values.
Table 3.2 Capacity data for 50-Hz, Downflow, horizontal-discharge models
3 System Data 17