Petra Variable Refrigerant Flow System

Petra Variable Refrigerant Flow (PVRF) with DC inverter compressor and R410-A refrigerant, offer a wide range of capacities to meet the customer requirements for different applications.

Petra PVRF is a linear system makes use of a variable Proportional Integral (PI) control system which uses refrigerant pressure sensors to give added control over inverter and ON /OFF control compressors in order to abbreviate control steps into smaller units to provide precise control in both small and larger areas.

Petra PVRF system enables individual control of up to 64 indoor units of different capacity and type at a ratio of 50~130 % in comparison with outdoor units capacity.

Petra PVRF system can reach the desired temperature quicker and steadily maintains it without wide fluctuations. That means uninterrupted comfort and significant energy savings.

PVRF systems have low running costs because it permits each zone to be controlled individually. That is, only those rooms that require air conditioning will be heated or cooled, while the system can be shut down completely in rooms where no air conditioning is required Many kinds of indoor units are available, including vertical and horizontal installation types, exposed and concealed type, with ability to connect all types of indoor units from 12 up to 64 units to one combination of outdoor unit.

The available evaporator sections are:

• • Low static pressure fan coil unit (RAC)
  • Medium static pressure fan coil unit (CMD)
  • High static pressure comfort maker (CM)
  • Wall type mini split unit
  • Universal type mini split unit
  • Cassette type mini split unit