Tcs basys SZ2166 multi stage chiller control


Subject: Tcs basys SZ2166 multi stage chiller control
The SZ2166 is a microprocessor based chiller controller. It is designed for use on multi-stage chiller applications and includes boiler support and control.
• Stand-alone or network operation
• Stand-alone or network operation
• 365-day time clock with two holiday schedules, automatic leap year and daylight savings correction
• No backup battery required for control parameters, schedule or clock
• Hot water supply and return temperature inputs
• Chilled water supply and return temperature input
• Two digital outputs for chillers
• One digital output for alarm
• Mixed water temperature input
• Outdoor air temperature input
• Separate setpoint for thermal storage sequence
• Outdoor air reset control
• Two digital inputs for pump status
• External time clock input
• Six digital outputs for chillers, pumps and chiller stages
• Adjustable offsets and differentials on digital outputs
• Lead/Lag sequencing of up to six chillers
• Two modulating analog outputs for valves and VFDs
• Adjustable P+I+D control on modulating outputs
• LEDs for monitoring status
• Automatic rotation of pumps
• Automatic rotation of chiller and boiler stages
• Domestic hot water function
• Local override and remote override capability