Transcription of Variable Volume Chilled Water Pumping System Controls
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Variable Volume Chilled Water Pumping System Controls
Dave Hacker Engineering ManagerKyle Schroeder, PE Sales EngineerVariable Volume Chilled Water Pumping System ControlsOutline Introduction Chilled Water Pumping Systems Configurations / control Strategies Primary Secondary Pumping Variable Primary Pumping Demonstration / Live Web Graphics Discussion and QuestionsLocal Service and SupportInnovative Energy Solutions 45 year record of successful project installations Hundreds of local DDC installations On-staff engineers, technicians Factory-trained 24 hour 7 day on-call service for Temperature Controls and Full HVAC Mechanical Service Service agreements Comprehensive local parts stock Local training Over 250 years HVAC / Controls experience on staffEvolution of Pumping SystemsVariable Flow ChillerVariable Flow Chiller2000s2000s1980s1980s1990s1990sPum p CurvePump CurveTechnologyTechnologyInnovationInnov ation33--way valvesway valvesPrimary / SecondaryPrimary / SecondaryBypass ValvesBypass ValvesConstant SpeedSystemsVFDsVFDsBasic Chilled Water Pumping Syst
temperature is above setpoint and at least 1 chilled water coil control valve is open to coil. Modulate (vary) the speed of the pump VFD to maintain a constant differential pressure. Enable chiller after flow is proven. Chiller operates to maintain leaving chilled water temperature at setpoint. Coil valves modulate to maintain comfortable space
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