Posts Tagged ‘Twin Rotary Compressor’


Focus on: Fujitsu J-IIS Mini VRF (2-Pipe)

Thursday, July 16th, 2015

It’s easy for this little diamond to go under the radar,  given it has a height of less than 1M.  The Fujitsu Air Conditioning J-IIS Mini VRF is becoming a very popular option for applications where space is restricted or the height of the condensing unit it paramount.

Fujitsu Air Conditioning J-IIS Outdoor

The single fan VRF can connect up to 8 fan coil units with up to 130% connected capacity and has a quiet operation of as low as 51dB(A) (4HP model).  Despite it’s small size, it certainly isn’t small in operation.  Comprising of full DC inverter control, a DC twin rotary compressor, a three row large heat exchanger and DC fan motor.

Not forgetting the engineer either, the outdoor has been designed for easy maintenance.  It has a 7 segment LED showing operation status, addressing & pressures hosted with a removable PCB panel for ease of access.

There is a full range of easy-to-use controllers available, from wireless remote controls to a PC-based control software. The installation can also be linked to a building management system. The touch panel LCD wired controller has a large clear screen for ease of use and allows service engineers to interrogate indoor and outdoor units to diagnose the system.

The Fujitsu Air Conditioning J-IIS Mini VRF is available from Cool Designs Ltd.

New Toshiba SMMSi

Tuesday, June 22nd, 2010

2010 Sees the introduction of the next in the series of  Toshiba VRF.  The first product due is the new range of Heat Pump VRF condensing units later this year.  Little known about exactly what breakthrough’s Toshiba have accomplished but we have found that that these systems will include three inverter compressors.  Toshiba made an industry first by making their current VRF fully inverter with each module including two inverter compressors with the ability to isolate each individual compressor if needed.  More on this as we hear it!

Toshiba SMMSi known features

  • Three Twin Rotary Inverter Compressors

Toshiba Launch Estia Air to Water Heat Pump System

Monday, June 21st, 2010

Toshiba has long term experience of successes in air to air heat pump production. The same reliable award winning technology is at the core of the new air to water heat pumps. Above all the advanced inverter technology and the DC twin rotary compressor. Estia heat pumps operate with the reliable and safe R410A refrigerant.

The high efficiency plate heat exchanger receives the optimum quantity of refrigerant to produce hot water at low or medium temperature (20-55’C), or cold water (10-20’C). A back-up heater (3,6 or 9kW) futher supports the operation for extreme conditions. The hydro unit integrates the advanced control of water temperature to allow an optimized distribution to emitters and to the domestic hot water tank.

The Estia tank is a compact stainless steel insulated tank producing domestic hot water for sanitary use. The performance of the overall system is also maximised thanks to the integrated coaxial heat exchanger which uses hot water produced by the heat pump (whenever energy efficient and possible). With the optimised control logic, whenever additional hot water is needed, an internal electric heater is activated. This solution reduces running cost and guarantees a constant level of hot water temperature. Three storage capacities (150, 210 or 300 litres) meet any household requirements.

The system includes a weekly timer that controls the distribution of hot water up to 2 zones and to the hot water tank. The built in software logic collects the signals from the sensors, regulates the water temperature and optimizes the systems energy consumption. In addition the anti-bacteria control routinely increases the temperature in the domestic hot water tank. The easy to use remote control is conveniently attached to the hydronic unit. With its large and detailed display it is possible to visualize and set all the major operating parameters and also program the weekly timer.

The Toshiba Estia has a COP of up to 4.66.