October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Thermal Vacuum Valve (TVV)

Heat the sensing portion of TVV to 129°F (54°C) by immersing in hot water. Blow air into one of the pipes and check that TVV is open. Cool sensing portion of TVV to below 95°F (35°C) by immersing in cool water. Blow air into one of the pipes and check that TVV is closed. If a problem is found, replace TVV.