Fan Data; Calculating Total Static Pressure - AIREDALE EasiCool Technical Manual

EasiCool

Fan Data

Calculating Total Static Pressure

Example
Indoor Unit Model Ref = V50-CW-EZRE-2
Design Air Volume = 4.4m³/s
Design External Static Pressure (ESP) = 85Pa
• Plot the Design Air Volume from the X Axis vertically.
• Where the X Axis and the System Curve intersect, plot a line to the Y Axis, to establish the
Internal Static Pressure (ISP)
• Calculate the Total Static Pressure (TSP) of the system thus:
ISP + ESP = TSP
• Using the TSP, plot a line from the Y Axis to intersect with the Design Air Volume line. Where
the line intersects, an approximate Input Voltage can be estimated between those noted on the
graphs.
800
700
660
600
575
500
400
1000 RPM
300
200
100
0
2.00
136 EasiCool Technical Manual 7525389 V1.8.0_05_2016
V50-60 Backward Fan Curve
1510 RPM
1250 RPM
750 RPM
2.50 3.00 3.50
Internal Static Pressure + External Static Pressure = Total Static Pressure
Precision Air Conditioning
1510 rpm
4.4
4.00 4.50
AirFlow [m
3 /s]
e.g. 575+85 = 660
V 50 - 60
5.00 5.50 6.00