Promising more accurate temperature control and long-term reliability, new ESE Series EarthSmart™ central chillers from Conair give plastics processors the flexibility to start with one chiller and expand to a plant-wide multiple chiller system operated by a single easy-to-use controller.
ESE chillers are available with integrated pumps and fluid reservoir or as a standalone chiller to supply a separate pump tank system. Systems can be water cooled, using tower water, or can be installed in a remote-air-cooled condenser configuration. There are 12 different sizes available from 10 to 160 tons, with a single refrigeration circuit available on units from 10 to 80 tons in capacity and dual refrigeration circuits available from 20 to 160 tons. Each refrigeration circuit has two Copeland scroll compressors so the system can stay up and running even if one of the compressors should require maintenance.
To meet immediate process requirements and allow for future expansion, users can install one or more ESE chillers and then add more modules up to a total of six for cooling capacity to 960 tons. All units – up to a total of 12 refrigeration circuits – can be connected to a single control interface using twisted-pair wiring, for centralized control of all chiller circuits.
PLC CONTROL FOR ACCURACY
The standard Panasonic PLC control operates with proprietary programming developed specifically for the ESE chillers. The LCD touch-screen user interface allows for quick monitoring and control, using a clear, simple-to-understand display.
All circuits are controlled using readings from a common manifold-mounted temperature sensor to avoid the blending and temperature drift that can occur when individual supply and return sensors are used. Electronic expansion valves, instead of more conventional pressure-actuated valves, are used to compensate automatically for load variations and ambient conditions. The condenser-water regulating valve is electronic too.
Extensive temperature and pressure displays, trending screens and efficient diagnostic tools make it easy to commission and fine tune chillers for optimum plant efficiency. In fact, the system provides so much information that service and maintenance personnel typically do not need meters or gauges.
RESILIENT DESIGN AND CONSTRUCTION
ESE chillers are built in an ISO 9001:2008-certified facility using the highest-quality materials available. Standard direct-drive scroll compressors are inherently more reliable than most other designs and are hermetically sealed to minimize maintenance requirements.
Remote air-cooled models feature brazed-plate, stainless-steel evaporators to resist corrosion. Water-cooled units feature a shell-and-tube condenser and a filtration system to keep out debris and prevent clogs. Chillers with integral stainless-steel reservoir and pumping system are delivered piped, wired and ready for quick installation.
The Conair Group (www.conairgroup.com) is a leading global supplier of auxiliary equipment for plastics processors, including resin drying systems, blenders, feeders and material-conveying systems, temperature-control equipment and granulators. Extrusion solutions include line-control systems, film and sheet scrap-reclaim systems and downstream equipment for pipe and profile extrusion. Over 450 individual products solve problems, save energy, cut waste and are easy to use. Conair is also an international company, with long-standing operations in Europe, Asia and Latin America. The industry’s most complete product line, top-flight engineering and unbeatable service, all combine to give processors the confidence they need to succeed in today’s competitive global marketplace.