ESIE10-01 General Outline
Part 1 – System Outline 1–75
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1.25 Available Fan Static Pressure Correction Factors
CIAT: Condenser Inlet Air Temperature
CIAT: Condenser Inlet Air Temperature
How to use the
Correction factors
proposed in the
previous tables?
Type
EWAD~C-SS /
EWAD~C-SL
EWAD~C-XS /
EWAD~C-XL
EWAD~C-PR
LN
EWAD~C-PS /
EWAD~C-PL
External Static Pressure (Pa)0 102030405060708090100
Cooling Capacity (kW) Correc-
tion factor
1.000 0.998 0.996 0.995 0.993 0.992 0.991 0.989 0.986 0.985 0.982
Compr. Power Input (kW) Cor-
rection factor
1.000 1.004 1.009 1.012 1.018 1.021 1.024 1.027 1.034 1.039 1.045
Reduction of Max CIAT (°C) 1.000 -0.3 -0.5 -0.7 -1.0 -1.1 -1.3 -1.6 -1.8 2.1 -2.4
Type EWAD~C-SR EWAD~C-XR EWAD~C-PR
External Static Pressure (Pa) 0 10 20 30 40 50 60 70
Cooling Capacity (kW) Correction factor 1.000 0.996 0.991 0.985 0.978 0.97 0.954 0.927
Compr. Power Input (kW) Correction factor 1.000 1.005 1.012 1.02 1.028 1.039 1.058 1.092
Reduction of Max CIAT (°C) 1.000 -0.3 -0.7 -1.1 -1.6 -2.2 -3.3 -5.1
Example
Unit Size: EWAD650C-SS
External Static Pressure: 0 Pa
Working Condition: ELWT 12/7°C – Condenser inlet air temperature 35°C
Cooling capacity: 647 kW
Power Input: 221 kW
Maximum CIAT: 46°C (see graphic operating limit)
External Static Pressure: 40 Pa
Working Condition: ELWT 12/7°C – Condenser inlet air temperature 35°C
Cooling capacity: 647 x 0.993 = 642 kW
Power Input: 221 x 1.018 = 225 kW
Maximum CIAT: 46°C - 1.0 = 45°C
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