....................................................................................182. GENERAL PRECAUTIONS ..........................................................................................................................................................183. INSTALLATION REGULATIONS ..................................................................................................................................................193.1. OPEN expansion Tank system ......................................................................................................................................................................193.2. CLOSED expansion Tank system .................................................................................................................................................................203.3. ANTI-CONDENSATION MIXING VALVE - (purchased as OPTIONAL part) .................................................................................................203.4. AUTOMATIC THERMAL DISCHARGE VALVE DSA (purchased as OPTIONAL part) ................................................................................203.5. SYSTEM CONNECTION AND FILLING .......................................................................................................................................................204. FIRE SAFETY ................................................................................................................................................................................214.1. IN A EMERGENCY .......................................................................................................................................................................................215. TECHNICAL DESCRIPTION .................................