Thermal reservoir for two-pipe hydronic air-conditioning system

A thermal reservoir for a two-pipe hydronic air-conditioning system which said two-pipe hydronic air-conditioning system contains a volume of water, means to condition the temperature of said volume of water having a first end and a second end, a pump to circulate said water about a piping loop containing a supply line and a return line and a plurality of water-to-air heat exchangers connected to said supply line and to said return line of said loop, comprising:

• a. tank means having a first portion and a second portion which are fluidly separated from each other;
• b. first valve means having first end and second end;
• c. second valve means having first end and second end;
• d. third valve means having first end and second end;
• e. fourth valve means having first end and second end;
• f. first pipe means connecting said first portion of said tank to said first end of said first valve means;
• g. second pipe means connecting said second end of said first valve means to said first end of said second valve means;
• h. third pipe means connecting said second end of said second valve means to said second portion of said tank;
• i. fourth pipe means connecting said first portion of said tank to said first end of said third valve means;
• j. fifth pipe means connecting said second end of said third valve means to said first end of said fourth valve means;
• k. sixth pipe means connecting said second end of said fourth valve means to said second portion of said tank;
• l. seventh pipe means connecting said second pipe means to a first portion of the piping loop of said two-pipe hydronic air-conditioning system;
• and
• m. eighth pipe means connecting said fifth pipe means to a second portion of the piping loop of said two-pipe hydronic air-conditioning system.