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.