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. |
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