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Flow diagram

flow diagram radiant system
Figure 3. Heated and chilled water supply to the radiant systems 

There are 26 groups of mullions in the IW. Each group has four mullions controlled by one control valve. The mullion pump currently runs at about 24gpm during the daytime schedule. Currently, the IW mullion system is the only user of the hot water produced by the heat exchanger in the basement.  The surface temperature of the mullions is controlled based on the outside and inside temperatures and the room air set point temperature.

mullion layout 
Figure 4. Mullions - layout