Nexus Dual Circuit D

The Nexus Dual Circuit D is a compact wall mounted interface unit suitable for studio flats and up to 2/3 bedroom apartments where stored hot water and indirect apartment heating are required from separate appliances.

Specification:

  • Delivery of max 25 litres/min to remote DHW cylinder coil
  • Heating output up to 20kW
  • Wall mounted design
  • Top and bottom connections
  • Hydraulic separation between primary and apartment heating circuit
  • Direct connection from primary circuit to DHW cylinder coil
  • Stored DHW (cylinder supplied separately) and secondary heating
  • Insulated copper brazed AISI 316 stainless steel plate heat exchanger from SWEP
  • Differential pressure control valve (DPCV)
  • Microprocessor controls
  • Electronic temperature control of secondary heating
  • Mechanical temperature control of stored DHW via remote cylinder thermostat
  • Insulated painted steel case (RAL 9010) with lockable door
  • High efficiency ErP compliant modulating secondary high torque heating pump from Wilo
  • 4bar rated pressure relief valve on secondary heating circuit
  • Pressure gauge on secondary heating circuit
  • 8.5 litre expansion vessel on secondary heating circuit
  • Primary circuit strainer
  • 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 output kWHeating 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