Commercial Natural Refrigerant
Air-To-Water Heat Pumps
The S-ASX-OPVi range comprises 3 models offering LTHW heating, as well as Hot Water Production, in 45kW, 90kW and 135kW outputs in the A7W35 condition. The OPVi product designation refers to multiple low volume circuits of the R454C low pollutant refrigerant utilised in this range of machines which delivers highly efficient heating with an low GWP of 148, as well as cascading vapour injection scroll driven inverter compressors enabling effective and smooth load matching. The V frame format ensures the smallest possible unit footprint whilst also maximising incoming air flow for high output and efficiency. All the S-ASX-OPVi machines are capable of operating in a stable condition to a maximum of 68°C at the outlet, although at DT 5°C the maximum stable operating temperature is 63°C, with a maximum return of 57°C. The control system allows the unit to be operated in a cascade of up to 16 compressors, with each compressor delivering 45kW of thermal output. The S-ASX-OPVi units are provided as standard with BACnet IP protocol making the units compatible with modern BMS systems for full smart building control integration.
All the machines are supplied with low noise set-up as standard with an integrated fully modulating circulating pump and a loose supplied degassing valve to safeguard against hydraulic contamination.
Heat energy from the ambient air is obtained from the R454C refrigerant circulating inside a bank of copper and aluminium fins and then this energy is passed, after the compression cycle, to the heating circuit through a stainless steel brazed heat exchanger. The circuit is controlled by the standard supplied temperature probes and pressure transducers and is protected by high and low pressure switches. The plate heat exchanger and all hydraulic pipework is thermally insulated to avoid condensation and avoid heat loss. The S-ASX-OPVi units are fully reversible and can operate in cooling mode in the summer months. Full EER data is available on request.
