UK: Toshiba is all set to raise the bar with the launch of its new groundbreaking energy efficient SMMS-e VRF air conditioning heat pump system.
The latest generation of the company’s industry-leading VRF continues to push the boundaries, by setting a new benchmark for energy efficiency and comes fully loaded with a number of industry firsts such as continuous heating and an innovative hands-free wireless commissioning system.
At the heart of Toshiba’s new technology is a new rotary compressor, which uses a two-stage compression process for improved efficiency and performance.
Surfaces on the compression vanes are treated with a high-tech Diamond-Like Carbon (DLC), giving outstanding hardness, wear resistance and reliability. This enables a significant increase in compressor rotation speed, resulting in a higher displacement volume of up to 50% greater than the previous generation of VRF systems.
As a result of the new compressors design and improved system controls, the operating temperature range has been significantly extended, and is now -5 to +46C for cooling operation and -25C to +15.5C in heating mode.
The system’s heat exchanger has been completely redesigned, using smaller diameter tubes arranged in three rows in the coil, resulting in a 13% increase in surface area, further improving performance and efficiency.
The capacity of the new generation heat exchanger can be adjusted to match the current load and ambient conditions. The new three-way variable heat exchanger enables the VRF’s control system to automatically select the optimum setting.
The SMMS-e breaks new ground in being able to provide continuous heating, with no requirement to stop during defrosts, as with rival systems. This is made possible by the use of a new hot-gas bypass control, which simultaneously defrosts outdoor heat exchanger coils, while allowing the indoor unit to continue operating in heating mode.
Advanced intelligent control
For installers, Toshiba has developed Wave Tool Technology (WTT), a wireless commissioning and performance validation tool that enables engineers to read and write data to the condensing unit using their smart phone, enabling testing and commissioning without removing the unit covers.
This WTT allows service and commissioning engineers to instruct and obtain key system information, simply by touching their smart phone onto the Near Field Communication (NFC) tag located on the outdoor unit.
The technology simplifies commissioning and reduces the amount of time spent on-site, giving the service engineer the ability to quickly and easily send key system data via e-mail back to the office for analysis.
Importantly, the SMMS-e is available in a wider capacity range than ever before. On the smaller end of the scale, indoor units are now available in capacities of 0.6hp, increasing the number of units that can be connected into a system, making it more flexible. Up the scale, outdoor units can offer up to 22hp on a single module platform, due to a newly developed chassis, reducing footprint, pipework and speeding up installation time.
With the new SMMS-e, it is now possible to connect up to 60hp in a single system, with up to 64 connectable indoor units, beating the previous 48hp maximum by a wide margin.
Improvements in pipe work and connectivity give significant advantages in terms of system design and application. Maximum total pipe work length for SMMS-e is 1000m (double the previous allowable length), with 235m now the maximum allowable distance between an outdoor unit and the farthest indoor unit, another industry first.
A maximum of 40m between indoor units is enough to cover an entire 11-storey building, expanding the application envelope for Toshiba VRF to larger buildings.
Finally, in another industry first, the combined compressor, heat exchanger and advanced intelligent control technologies ensure all of the outdoor units in Toshiba’s new SMMS-e VRF range have an ESEER (European Seasonally Adjusted Energy Efficiency Rating) higher than 7, making it a cut above the rest of it’s rivals.