Nexus Dual Stage

The Nexus Dual Stage interface unit is designed for larger or high-end apartments where there is an increased demand for instantaneous DHW and apartment heating.

Specification:

  • DHW output up to 150kW (model dependent)
  • Heating output up to 20kW (model dependent)
  • Wall mounted design
  • Top and bottom connections
  • Hydraulic separation between primary and apartment heating circuit
  • Instantaneous high output DHW generation and secondary heating
  • DHW priority over secondary heating
  • Fast DHW temperature stabilisation attributed to Dual Stage operation
  • Insulated copper brazed AISI 316 stainless steel plate heat exchangers from SWEP
  • Insulated mains cold water (MCW) pipework
  • Unique ModFlow modulating primary control valves (PICV functionality)
  • Microprocessor controls
  • Electronic temperature control of both DHW and secondary heating
  • Switchable keep warm function on DHW plate heat exchangers
  • Insulated painted steel case (RAL 9010) with lockable door
  • High efficiency ErP compliant modulating secondary heating high torque 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 for time/temp control (volt free contact)
  • Prepaid billing integration
Heating Performance Data up to 10kW:
Primary flow rate °CHeating output kWHeating temps °CHeating flow rate l/minResidual pump head Δp-c kPaResidual pump head Δp-v kPaPrimary pressure drop kPaPrimary return temp °C
70545/3510.7654420.535.3
70550/4010.7654420.740.2
70560/405.3855370.943.4
701045/3514.3549442.235.6
701050/4014.354944340.8
701060/407.1855383.844.2
75545/3510.7654420.435.2
75550/4010.7654420.540.3
75560/405.3855370.642
751045/3514.3549441.635.4
751050/4014.3549442.240.5
751060/407.1855382.542.7
80545/3510.7654420.335.1
80550/4010.7654420.440.2
80560/405.3855370.441.2
801045/3514.3549441.335.2
801050/4014.3549441.640.4
801060/407.1855381.841.9
Heating Performance Data up to 20kW:
Primary flow rate °CHeating output kWHeating temps °CHeating flow rate l/minResidual pump head Δp-c kPaResidual pump head Δp-v kPaPrimary pressure drop kPaPrimary return temp °C
701545/3521.5328284.635.6
701550/4021.5328286.440.8
701560/4010.7655438.344.3
702045/3528.71228.335.9
702050/4028.712211.641.2
702060/4014.35505015.745.2
751545/3521.5328283.535.5
751550/4021.5328284.640.6
751560/4010.7655435.342.9
752045/3528.71226.235.7
752050/4028.71228.340.8
752060/4014.3550509.843.6
801545/3521.5328282.735.3
801550/4021.5328283.540.4
801560/4010.7655433.842
802045/3528.71224.935.5
802050/4028.71226.240.6
802060/4014.3550506.942.6
DHW Performance Data up to 90kW
Primary flow rate °CDHW output kWDHW temps °CDHW flow rate l/minDHW pressure drop kPaPrimary flow rate l/minPrimarypressure drop kPaPrimary return temp °C
707510/4530.76132.525.834.427.5
707510/5026.9101.828.341.431
707510/5523.9280.331.551.335
709010/45n/an/an/an/an/a
709010/5032.3146.73563.332.2
709010/5528.71115.83978.636.3
757510/4530.76132.52327.326.7
757510/5026.9101.824.230.229.5
757510/5523.9280.326.636.533.3
759010/45n/an/an/an/an/a
759010/5032.3146.73046.530.8
759010/5528.71115.832.554.634.3
807510/4530.76132.520.662226
807510/5026.9101.821.323.428.2
807510/5523.9280.322.826.931.6
809010/45n/an/an/an/an/a
809010/5032.3146.726.335.729.5
809010/5528.71115.82840.532.7
DHW Performance Data up to 1200kW
Primary flow rate °CDHW output kWDHW temps °CDHW flow rate l/minDHW pressure drop kPaPrimary flow rate l/minPrimarypressure drop kPaPrimary return temp °C
7010510/4543.0652.535.929.727.3
7010510/5037.740.239.636.231.2
7010510/5533.531.744.545.735.4
7012010/4549.268.842.541.728.4
7012010/5043.0652.746.650.132.1
7012010/5538.341.652.563.636.4
7510510/4543.0652.531.62326.4
7510510/5037.740.234.126.830.2
7510510/5533.531.737.131.833.4
7512010/4549.268.836.630.927
7512010/5043.0652.74036.930.6
7512010/5538.341.645.948.633.6
8010510/4543.0652.528.318.525.4
8010510/5037.740.23020.828.5
8010510/5533.531.732.223.931.8
8012010/4549.268.833.325.626.4
8012010/5043.0652.735.629.229.7
8012010/5538.341.637.532.432.7
DHW Performance Data up to 150kW
Primary flow rate °CDHW output kWDHW temps °CDHW flow rate l/minDHW pressure drop kPaPrimary flow rate l/minPrimarypressure drop kPaPrimary return temp °C
7013510/4555.3681.746.649.127.7
7013510/5048.4462.651.660.231.5
7013510/5543.0649.457.574.835.6
7015010/4561.5101.153.364.228.5
7015010/5053.8377.457.574.832.6
7015010/5547.8561.265.897.936.5
7513510/4555.3681.740.837.626.5
7513510/5048.4462.643.342.429.5
7513510/5543.0649.447.55133.4
7515010/4561.5101.146.348.527.3
7515010/5053.8377.449.655.630.5
7515010/5547.8561.254.266.434.3
8013510/4555.3681.736.630.325.6
8013510/5048.4462.638.83428.7
8013510/5543.0649.441.338.631.9
8015010/4561.5101.1413826.2
8015010/5053.8377.443.843.429.4
8015010/5547.8561.246.649.132.6