17DA Open-Drive Centrifugal Chiller

3000 to 6800 Nominal Tons (853 to 1933 kW), HFC-134a

A custom-designed central plant chiller that meets today's energy efficiency and environmental concerns:

Positive-Pressure Design

The 17DA is available with HFC-134a positive-pressure refrigerant, a smart solution to today's environmental problems. Positive-pressure design keeps air and moisture out of the chiller.

Design Flexibility

The 17DA allows for a wide selection of component variations, permitting an optimum match of equipment to specific project requirements. The open-drive design provides the ultimate in driver type flexibility. Selection of electric motor or turbine can be optimized for the best fuel economy both today and in the future.

Design Performance and Serviceability

The 17DA compressor incorporates a dual capacity control system. This system combines the simplicity of a single stage high efficiency shrouded impeller the precision of a variable inlet guide vanes and diffuser ring control to provide optimum performance throughout a wide range of operating conditions. The variable inlet guide vanes regulate the volume and direction of the suction gas entering the compressor. As the machine's capacity drops below 50%, the diffuser ring gradually closes to maintain a high gas velocity through the diffuser openings. This sequence maintains stable operation down to 15% load, eliminating the possibility of compressor surge and the need for inefficient hot gas bypass with its associated high noise.

The Atmospheric Lubrication System is designed to provide positive oil-pressure to the compressor bearings for proper lubrication to the iso-carbon seal to prevent escape of refrigerant from the compressor chamber during operation. During idle periods, a shutdown seal is engaged to prevent refrigerant loss which eliminates the need to operate the oil pump.

Since the bearing and seal housing operates at atmospheric pressure, oil foaming is eliminated during start-up and operation of the machine. In addition, inspection and servicing of journal bearings, thrust bearings, iso-carbon seal, and lubrication system components can be performed without the removal of refrigerant from the machine, reducing service time and costs.

The single bearing chamber cover is easily removed to provide quick access to all bearings and the carbon running seal. Removing four bolts from the bearing caps allows the split sleeve journal bearings to be removed for inspection of the thrust bearing faces. Two more bolts allow removal of the running seal cap for inspection of seal parts. The drive coupling never has to be disturbed.

Removing the suction elbow and the front compressor cover plate provides compete access to the rotor and guide vane assembly. Discharge pipe and compressor casing remain in place, saving time and labor.

No other compressor in the industry is as easy to service as Carrier's 17DA, saving both time and labor costs for the operator/end-user.

Customer Satisfaction

Carrier provides complete engineering support from our staff of knowledgeable and experienced engineers. From feasibility to start-up, this engineering support ensures that all aspects of every 17DA project run smoothly. In addition, Carrier provides an extensive service network ready to help at a moment's notice, 24 hours a day.

For more information call 1-800-CARRIER.