Invictus Model IVS-095-WLB (4 ton unit) qty-2

Trace700 has a nice direct fired single stage absorption water cooled chiller. I copied the unit and changed only the Utility over to gas and didn't mess with it too much (since I need it to work first).

I think the unit is using the cooling or heating as needed to the 4-pipe fancoil/DOAU system with boiler backup heat. The cooling capacity by the 2 units is 1/2 ton short so these will be on more than cycling on/off during peak times. There is more to the story I'm not getting into right now, but there is a 34,000cfm DOAU process ventilation...HW heating only. 

Kinda goes along the same lines as the Multistack Chillers and Tranes bidirectional cascade piping/controls

{Work in Progress}