Nexus Dual Circuit D Combined

The Nexus Dual Circuit D Combined is a floor standing interface unit suitable for larger or high end apartments. It delivers large volumes of stored DHW and high outputs for indirect apartment heating and cooling. The unit manages the heating and cooling and is designed to be connected to a separate DHW cylinder(s).

Specification:

  • Delivery of max 25 litres/min to remote DHW cylinder coil
  • Heating output up to 20kW
  • Cooling output up to 20kW
  • Floor standing design
  • Top connections
  • Hydraulic separation between primary and apartment heating & cooling circuits
  • Direct connection from primary circuit to DHW cylinder coil
  • Stored DHW (cylinder supplied separately) and secondary heating & cooling
  • Insulated copper brazed AISI 316 stainless steel plate heat exchangers from SWEP
  • Insulated cooling pipework
  • Differential pressure control valve (DPCV)
  • Microprocessor controls
  • Electronic temperature control of secondary heating & cooling
  • Mechanical temperature control of stored DHW via remote cylinder thermostat
  • Insulated painted steel case (RAL 9010) with lockable front panel
  • High efficiency ErP compliant modulating secondary heating & cooling high torque pumps from Wilo
  • 4bar rated pressure relief valve on secondary heating & cooling circuits
  • Pressure gauge on secondary heating & cooling circuits
  • 8.5 litre expansion vessel on secondary heating & cooling circuits
  • Primary circuit strainers
  • Interface with external programmer(s) for time/temp control (volt free contact)
  • Prepaid billing integration
Heating Performance Data up to 20kW
Primary flow temp °CHeating outputHeating temps °CHeating flow rate l/minResidual pump head Δp-c kPaResidual pump head Δp-v kPaPrimary flow rate l/minPrimary pressure drop kPaPrimary return temp °C
801045/3514.450463.31.835.1
801050/4014.450463.72.340.2
801060/407.256403.82.541.1
802045/3528.71336.67.535.5
802050/4028.71337.59.640.6
802060/4014.3550467.91142.6
851045/3514.4504631.635.1
851050/4014.450463.31.840.1
851060/407.256403.4240.7
852045/3528.71336635.4
852050/4028.71336.67.540.5
852060/4014.3550466.9841.9
Cooling Performance Data up to 20kW       
Primary flow and return temps °CCooling output kWPrimary flow rate l/minCooling flow rate l/minResidual pump head Δp-c kPaResidual pump head Δp-v kPaPrimary pressure drop kPaCooling flow and return temps °C
6/121536366161188/14
6/12204848555523