HIGHLIGHTS 

•  Wide Range of Capacities: from 7.2 T.R to 12.8 T.R @50 Hz 

•  Easy installation

•  R-410a refrigerant 

•  High efficiency system

DESCRIPTION

PETRA’s Variable Refrigerant Flow (PVRF) with DC inverter compressor and R-410A refrigerant, offer a wide range of capacities to meet the customer requirements for different applications. It is a linear system that 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 systems enable individual control of up to 64 indoor units of different capacities and types at a ratio of 50~130 % in comparison with the outdoor units capacity. PETRA’s PVRF systems can reach the desired temperature at a quicker rate and steadily maintains it without wide fluctuations. That means uninterrupted comfort and significant energy savings. PVRF systems have low running costs by permitting each zone to be controlled individually. By using this system, only rooms that require air conditioning will be heated or cooled, as for the rooms that do not, the system could be easily turned off.


TECHNICAL FEATURES AND OPTIONS

The key benefits of R-410A and the air conditioning systems that use it are:

• Higher EER (Energy Efficiency Ratio)

• Enhanced heat-pump performance

• Increased efficiency and reliability

• Cost-effective design

• Proven long-term HCFC replacement capability

• No ozone-depleting chemicals

• Lowest global warming TEWI (Total Equivalent Warming Impact)

• The sizes (housing) of the basic outdoor units (modules) for combined use are all the same height

• The basic construction work required is also the same for each unit, so installation is simple

• The differences between base units and extension units have been eliminated, meaning that devices can be installed in the
   order they are delivered. Even better, the units’ compact size means that all capacity classes can be easily carried in and out
   as separate items, using ordinary lifts

• Easy Installation