Close Control – CA Range Fluid Chillers Heat is removed from the circulating fluid by a stainless steel brazed plate type evaporator, and subsequently rejected to atmosphere via a copper tube, aluminium finned air-cooled condenser. Six pole motors drive propellor type condenser fans as standard, whilst optional eight pole motors can be fitted for very noise sensitive external applications. Axial fan types can be supplied to develop static pressure, if required, for ducted plant room applications. If units are to be sited in arduous environments, condenser coils can be supplied with alternative copper fins and these can further be appropriately coated as necessary. The microprocessor controller senses the fluid temperature and cycles the refrigeration system accordingly. Hot gas injection can, however, be specified for precise load/capacity matching, and this can incorporate liquid desuperheating if operation at high turndown is envisaged. Basic evaporator protection is provided by a flow or pressure differential switch, but this is of course further enhanced if the hot gas option is fitted. Compressor protection is provided both by external adjustable high pressure and low pressure cut off switches, and by internal thermostatic devices. CA chillers are applied when process fluid temperatures cannot be achieved year round by using either dry coolers or evaporative cooling towers. This is usually where a supply temperature of 15°C or below is required, in moderate climates. A direct expansion refrigeration system is used, incorporating the latest scroll compressor technology and operating with non-ozone depleting refrigerants. Multiple modules can be stacked vertically to provide increased capacity with resultant inherent autonomy, or simply for standby capacity with ease of installation.

CA Range