An electronic expansion valve, using PID control, continuously adjusts the refrigerant volume in respond to load variations of the indoor units. The VRV
system thus maintains comfortable room temperatures at a virtually constant level, without the temperature variations typical of conventional ON/OFF
control systems.
1
The thermostat can control stable room temperature at ± 0.5°C from set point.
NOTE
1
the graph shows the data, measured in a test room assuming actual heating load.
1-3
Less frequent start/stop cycle - VRVII & VRV-WII
•
The technique adopted by Daikin, of regulating the capacity using multiple compressors clearly results in minimum switching losses and power surges
because of the overlap in capacity and frequency
•
Since Daikin utilises small 5HP inverter compressors, the influence of harmonics is less than that generated by a single large compressor
•
The use of multiple compressors by Daikin also ensures a 50 % standby facility
•
Smaller compressors are cheaper and faster to replace