Daikin is set to launch 4th generation of VRV with claimed benchmark efficiency and enhanced functions
The new VRV IV heat pump units will be available from January 2013 with three key functions: variable refrigerant temperature, continuous heating during defrost and the VRV configurator for simplified commissioning and servicing.
Variable refrigerant temperature technology allows installers to customise the system using a choice of pre-sets.
In automatic mode, the system is configured for high efficiency levels throughout the year, while allowing rapid response on the hottest days, thereby ensuring comfort at all times.
Daikin say this technology is capable of delivering a 28 per cent increase in seasonal efficiency, because the system continually adjusts the refrigerant temperature according to the total required capacity and weather conditions.
For example, in mid-season when little cooling is needed, the room temperature will already be close to the setpoint, so a small difference between room and refrigerant temperature is sufficient for the system to operate effectively.
In automatic mode, the system will change the refrigerant temperature from 6 deg C (the current operating standard) to a higher temperature, resulting in reduced energy consumption and significantly improving the seasonal efficiency.
The other available mode is the “high sensible” mode, where energy efficiency is maximised with guaranteed high outblow temperatures and no cold drafts, but the set point may not be maintained so accurately.
Continuous heating during defrost is another revolutionary innovation that sets a new standard in comfort, making VRV IV the best heat pump alternative to traditional heating and cooling systems.
Continuous heating finally overcomes any perceived disadvantages of specifying a heat pump because the heat pump continues to provide continuous comfort, even when in defrost mode.
The new VRV configurator completes the trio of innovations, offering an advanced software solution which simplifies commissioning and servicing.
The software allows the remote configuration of settings that can be used at multiple sites, so less time is required on the roof, configuring the outdoor unit. Ongoing maintenance is easier too, thanks to a graphical interface that allows engineers to evaluate operational data and errors.