It will automatically adjust capacity control to: Variable flow compensation is a new optional control feature for CTV chillers. How It Works The Tracer chiller controller uses a patented, variable, water-flow compensation algorithm to maintain stable, precise capacity control. The following data will be shown at the DynaView and TechView displays and at Tracer Summit. Flow switches or some other means to prove flow are still required and must be field connected. This option includes transducers for the differential evaporator and condenser water pressures (psid). The Condenser Limit Setpoint is factory set (93 percent of HPC), however can be altered via the service tool. When limited by this action, “Condenser Pressure Limit” will be displayed as a sub-operating mode. If the Condenser Refrigerant Pressure Sensor is installed, then the limit will be based from the Pressure sensor.
The Condenser Limit will be based from a pressure conversion from the Condenser Refrigerant Temperature sensor, unless there is a Condenser Refrigerant Pressure sensor installed (CDRP option). The purpose of this limit is to avoid High Pressure Cutout (HPC) trips by allowing the Chiller to continue to run at a lower load instead of tripping off via HPC. A fully loaded compressor, operating at high Evaporator Leaving Water Temperature (ELWT) and high condenser temperatures causes high condenser pressures. This protection is called Condenser Refrigerant Pressure Limit, or High Pressure Limit. Condenser pressure is continuously monitored to provide a limit function that prevents High Pressure Cutout (HPC) trips.
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