Kelvin II Pressure SDR/CDS Valve Controller

• APPLICATION: Case Low Side Pressure Control / High Side Head Pressure Control / Case / Lineup Liquid Pressure Control / Commercial HVAC - Head Pressure Control / Specialty Applications
• SIGNAL OUTPUT: Relay: 100-240 VAC , 3A ind/250 V, 22-28 VDC, 250 mA Digital Output with Ground (Not Currently Used)
• SIGNAL INPUT: Digital: 0-5 VDC Maximum Range (Interface to Dry Contact or Open Collector), Analog: 4 Temperature Sensors- (2 Kohm, 3 Kohm, or 98.6 Kohm), 1 Pressure Transducer .5-4.5 VR (*150psiA, 150 psig, 300 psig, or 500 psig)
• CONTROLLER TYPE: Standalone Controller With Display
• INPUT VOLTAGE (VAC): 20-26 VAC
• INPUT VOLTAGE (VDC): 22-26.6 VDC; Class II Input
• COMMUNICATION PORT: RS 485, Modbus
• INDICATOR TYPE: LED- Red, Power
• DISPLAY TYPE: LED- Red, 7 Segment, 4 Digit; LED- Red, Power
• WIRING: Screw Terminal, 12-24 AWG
• OPERATING HUMIDITY: 0-95% Relative Humidity (Non- Condensing)
• NUMBER OF OUTPUTS: 2
• NUMBER OF INPUTS: 6
• MOUNTING: DIN Rail- EN 50 022
• MINIMUM OPERATING TEMPERATURE (F): -40°
• MAXIMUM OPERATING TEMPERATURE (F): 158°
• LENGTH (INCH): N/A
• KEYPAD/USER INTERFACE OPTION: Optical Encoder (SELECT knob)
• ENCLOSURE: PC- Light Gray

The Superheat control provides true pressure/temperature superheat control via EEV utilizing Sporlan’s unique control algorithms, while the subcool control replaces mechanical subcooling that combines liquid temperature control and minimum superheat control. The temperature and pressure controls allow precise control of air temperature and pressure using electric valves (SDR and CDS).

The Kelvin II controller line boasts both integrated and remote display options, Modbus® (via RS485) networking, Auto PID and simple setup and operation.

Features:
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• Controls electric evaporator regulator valve (CDS) or hot gas bypass valve (SDR) to regulate system pressure
• Remote access via Modbus
• Pumpdown mode via dry contact input
• Manual valve positioning
• Advanced algorithm with AUTO PID to optimize system performance
• Head pressure control to replace mechanical A8 and A9 valves
• Supports inlet or outlet regulator
• One dial for setting all parameters
• One Electric Valve control (bipolar stepmotor)
• 4-digit / 7-segment LED display
• Optional controller networking for remote access
• One pressure input
• One temperature input for high temperature cut-out
• One digital input (for external switch or relay)
• Two auxiliary temperature inputs