BOD_HeatExch_DistrHtg

The main control functions of the domestic hot water heat exchanger are:


Heat Exchanger Configuration Schematics


Standard stand-alone district heating heat exchanger with secondary supply temperature control and optional primary return temperature limitation.
It is not recommended to connect the primary pump in configurations with a 2-way valve



The configuration with a 3-way valve and primary pump should be used for calcification protection when the primary supply water has high calcium content. Whenever the primary supply temperature has to be lower than the district supply temperature, the configuration 3-way valve and primary pump should be connected

This configuration shows the standard district heating heat exchanger with a minimum pressure switch and a re-fill valve






Fig. 1.   Heat Exchanger Configurations