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48 _ Air conditioning system
has applied frontal induction and discharge method for the first time on a VRF unit,
therefore keeping the building interior safe from strong winds associated with high rise buildings.
Sirocco fans designed to withstand high building wind speeds
Building wind and reverse wind effect are stronger at higher floor levels, which can cause
discharge air to short cycle back to the induction side affecting system control. It can also
cause damage to the fans, which in turn will considerably reduce system performance.
However, is designed to generate very strong airflow (7m/s or more) to
overcome this problem. This makes ideal for use in such high rise
applications.
Design
Air guide
Conventional
Hot air
Building wind
4m/s
4m/s
Outdoor unit
Right outoor unit
7m/s
7m/s
Left outoor unit
No interference from the discharge air between units or between floors
Because of the symmetrical design characteristics of conventional VRF systems, high rise
installation is not always recommended (due to heat columns affecting system control on
higher floors). solves such installation problems using powerful left and right
air discharge fans which throw the air outwards rather than upwards, allowing high rise
installation with no control problems on the upper floors.
Sirocco fan
Conventional
Hot air
Building wind
61799 LG Multi V Catalogue 4/5/07 2:18 pm Page 48