Rheem Crossflow™ Heat Exchanger Technology

Model Number: RD600

Rheem Crossflow is used to instantaneously transfer the heat from the primary circuit to the secondary or domestic hot water circuit without the need for further storage.

Consists of two 316L stainless steel single wall brazed plate heat exchangers, and a temperature controlled variable speed circulator for the primary fluid circuit to regulate the rate of energy transfer to the potable water. The Rheem Crossflow controls allow heat input up to 90°C to be supplied on the primary side and accurate, reduced temperature to be delivered on the potable side.

Each heat exchanger can be separately isolated and removed for individual maintenance, thus providing redundancy capability.

  • WaterMark certified
  • Instantaneous delivery
  • Accurate temperature control
  • Factory assembled and tested
  • Single pump, or dual pump models for duty/standby redundancy
  • Manifold heat delivery skids for greater output
  • 316L stainless steel single wall brazed plate-type heat exchangers
  • Suitable for water to water only applications
  • Insulated heat exchangers to maximise efficiency
  • Hot dip galvanised frame
  • 316L stainless steel pipe work
  • Low pressure loss
  • 1 year parts and labour

*Warranty conditions apply 

**Nominal flow rate calculated with primary side temperature of 80°C and the secondary side inlet/outlet 15°C/65°C


Model     RD600
Nominal Capacity   kW 600
  Primary Side (Non-potable)    
  Inlet Temp °C 80
  Flow Rate L/min 144
  Pressure Drop kPa 36
  Secondary Side (Potable)    
  Inlet/Outlet Temp °C 15/65
  Flow Rate L/min 172
  Pressure Drop kPa 51
Dimensions H x W x D mm 1364 x 761 x 700
Weight   kg 138
Pipe Connections - Primary Circuit BSPF   RP1/1/4
Pipe Connections - Secondary Circuit     50mm Flange Type E
Max Operating Pressure Primary Circuit kPa   14001
Max Operating Pressure Secondary Circuit kPa   14001
Electrical Supply   230-240V 50-60Hz Hard Wired By Electrician
Min Circuit Size Amps   10

1 The maximum working pressure of each side of the system will be governed by the lowest operating appliance connected to it. The potable side (secondary side) water pressure must be higher than the non potable side (primary side) pressure.


Technical Documents

Owners Guide & Installation Instructions Download
CrossFlow-Delivery Skid drawing.pdf Download
CrossFlow-Delivery Skid drawing.dwg Download
Crossflow Brochure Download