VC Pro VRF 50/60Hz 
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Part 3 - System Design and Installation 
Figure 3-3.13: 28-30HP units fan performance 
 
3.5 Snow Shielding 
In areas of high snowfall, snow shields should be installed on air inlets and outlets to prevent snow from entering the units. 
Additionally, the height of the base structures should be increased so as to raise the units further off the ground. 
 
Figure 3-3.14: Outdoor unit snow shielding 
 
   
0
5
10
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Static pressure(Pa)
Air flow (m
3
/h)
Snow shield for air outlet
Snow shield for air inlet
Snow shield for air inlet
  Before installing outdoor unit ducting, be sure to remove the unit’s steel mesh cover, otherwise airflow will be 
adversely affected. 
Snow shield for air outlet