Hitachi has launched a new range of 2-pipe heat pump and 3-pipe heat recovery range to replace its existing Set Free VRF units.
Called Set Free Sigma, the new range extends the line-up from 5 to 24hp in a single unit module and up to 96hp with combinations. The outdoor unit casing has been completely redesigned and offers a total of seven new capacity models – 18, 20, 22 and 24hp (standard) and 14,16 and 18hp (high efficiency).
The new range will be produced in the company’s European manufacturing facility in Spain to be compatible with Hitachi’s System Free indoor range. The High Efficiency FSXNPE model extends compatibility further with up to 64 connectable 0.4hp or 0.6hp indoor units.
A new high efficiency DC inverter compressor is employed in the new range, giving precise control in 0.1Hz increments. This is said to provide a 4.6% increase in seasonal efficiency over previous models. Combined with a new fan design, bell-mouth fan housing and sigma-shape heat exchanger, the Set Free Sigma VRF range is said to achieve improved efficiency even at low or partial load in cooling operation, with performances increased to achieve SEER up to 8.33 and SCOP up to 5.06.
150 per cent combinability
All units are compatible with Hitachi’s System Free indoor range, with comfort (cold draught) protection available as standard across the range. The High Efficiency FSXNPE model combinability ratio has been extended to 150 per cent with up to 64 connectable 0.4HP or 0.6HP indoor units.
Gboyega Obafemi, Managing Director UK & Ireland, Johnson Controls-Hitachi Air Conditioning Europe SAS, commented:
“Perfect for the UK market, the new Hitachi Sigma VRF models deliver increased installation flexibility and, when combined with our changeover boxes and valves, enables both 2-pipe heat pump and 3-pipe heat recovery from a single unit for buildings where heating and cooling are required simultaneously,”