Under normal conditions, the boil-off is passed through a 1'' solenoid valve, SV91115A and is recovered (``recycled'') at ESR via the warm return line. The option of venting the magnet boil-off directly to the Hall exists via solenoid SV91115. These solenoids are wired such that opening one valve automatically closes the other. In this way, it is guaranteed that one valve is always open. The relay for vent solenoid SV91115 is tied to PI911211 so that the valve will automatically open whenever the pressure exceeds 1300 mbar. The valve should be closed by the target operator once the pressure drops below 1300 mbar.