Draining and expansion vessel for open solar heating system - provides security without temperature and pressure safety devices

摘要

A solar heating installation working with absolute security is an open one, so that no safety devices against excessive pressures and/or temps. are necessary. The system has a venting an expansion vessel to receive the contents of the collector when the circulation pump for the solar circuit is stopped. This vessel is open to the atmos. and is located at a lower level than the components threatened by excessive temp. or frost, so that the water or other heat transporting medium drains from the higher points of the plant into it.