Daikin EWAD740C-SS [81/304] Available fan static pressure correction factors

ESIE10-01 General Outline

Part 1 – System Outline 1–75

1.25 Available Fan Static Pressure Correction Factors

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

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