Unit control modue for 130 to 400-ton air-cooled chillers.

Clear Language Display Keypad (UCM) -- Air-Cooled, 70 to 125 tons

Trouble-Free Installation, Start-Up and Operation

Adaptive Control™ Microprocessor

The air-cooled Series R® chiller employs the most advanced microprocessor control available on any packaged water chiller in the marketplace and features the Adaptive Control microprocessor. So what is the Adaptive Control microprocessor? Adaptive Control means the Unit Control Module (UCM) directly senses the control variables that govern operation of the chiller : motor current draw, evaporator temperature, condenser temperature, etc. When any of the variables approaches a limit condition where the unit may be damaged or shut down on a safety, the UCM takes corrective action to avoid shutdown and keep the chiller operating. It does this through combined actions of compressor slide valve modulation, electronic expansion valve modulation and fan staging. Additionally, the UCM optimizes total unit power consumption during normal operating conditions. No other chiller control system in the marketplace duplicates this performance.

The End Of Nuisance Trip-Outs And Unnecessary Service Calls?

Unnecessary service calls and unhappy tenants are avoided. The unit does not nuisance trip or unnecessarily shut down. Only when the UCM has exhausted the corrective actions it can take and the unit is still violating an operating limit will the unit shut down. CONTROLS ON OTHER CHILLERS TYPICALLY SHUT DOWN THE CHILLER, QUITE PROBABLY JUST WHEN IT IS NEEDED THE MOST.

For example: A typical five-year-old chiller with dirty coils might trip-out on high pressure cutout on a 100 F day in August. A hot day is just when comfort cooling is needed the most. In contrast, the air-cooled Series R chiller with an Adaptive Control microprocessor will stage fans on, modulate electronic expansion valve, and modulate slide valve as it approaches a high pressure cutout. Thereby KEEPING THE CHILLER ON-LINE JUST WHEN YOU NEED IT THE MOST.