Tower developed a control system that took over the old steam heating valves by intercepting the air signal from the pneumatics and having it respond to a modern control signal. Additional relays were added to control the 40 ton cooling system and work with the new economizer. The new system was integrated into the Tekmar boiler controls so that the boiler was disabled when the restaurant was calling for cooling. It is very common for the facility to need cooling when fully occupied, even in winter, so having the heat running during a call for cooling made both the heating and cooling run at full capacity when not needed.
This new control is expected to save 40% on total energy costs throughout the season.