LG MULTI F A5UW40GFA0

3. Installation of outdoor unit
71 _ Heat pump 50Hz/R410A
Part 3 Design and installation
3.11.2 Air flow rate confirmation
Example. 1
n Application Model : A7UW40GFA0 [FM40AH UO2] Airflow rate 90 m
3
/min
Air guide duct
[Total opening rate]
390mm
165mm
620mm
165mm
1170 mm
1145 mm
n Louver total dimension (excluding frame) (A) = 1.2 m x 1.9 m = 2.28 m
2
n Louver shielding dimension by product (B) = 0.95 m x 1.17 m = 1.11 m
2
n Suction able louver dimension (A-B) = 1.17 m
2
n Equivalent suction dimension (Opening rate 80%) = 1.17 m
2
x 0.8 = 0.94 m
2
n Equivalent suction air volume = 0.94 m
2
x 2.5 m/s x 60s = 141 m
3
/min
n Required air volume / equivalent volume = 141 m
3
/min / 90 m
3
/min(product airflow rate) = 157 %
· OK
n Case : velocity of discharging air: 5m/s,
velocity of suction air: 2.5m/s
n Openness rate = 80% or more
h Openness rate =
n Air guide of discharging air part should be equipped.
Effective face area(Af)
Total face area(A)