Daikin DSC Series Installation Instructions Manual page 26

Airflow Pressure Drop of Downflow Economizer for 3 to 6 Ton Rooftop Units (100% Return Air)
SCFM 800 1000
in. WG 0.02 0.04
Use only the heater kit specified for each model as dictated by the table above.
ECONOMIZER-AIRSIDE PRESSURE DROP
1200 1400
0.05 0.07
MINIMUM AIR FLOW FOR ELECTRIC HEAT
UNIT
3 TON
4 TON
5 TON
ATTENTION INSTALLING PERSONNEL
1600 1800 2000
0.09 0.12 0.14
HEATER KIT
MODEL NUMBER
EHK*-10
EHK*-15
EHK*-10
EHK*-15
EHK*-18
EHK*-10
EHK*-15
EHK*-20
26
2200 2400
0.17 0.21
MINIMUM CFM
1250
1250
1300
1400
1400
1700
1700
1800
2600 2800
0.24 0.28