The KSM range of Centrifugal Chillers using the first and only Oil Free Magnetic Bearing Compressors to be manufactured in India. The range uses 1 or 2 compressors with a common set of heat exchangers to achieve a range of capacities from 450 to 1200 TR.

• IPLV < 0.30, COP > 6.5
• Single & Dual Compressor, 250 ~1200 TR
• Oil Free Operation
• Extremely Low OPEX, attractive ROI
• 5-Star BEE Rating

Efficiency Advantage:

• Single stage compressor design
• Optimized impeller designs
• High efficiency, refrigerant cooled motors
• Option of fixed and variable speed drives
• Flooded design evaporators
• Oil free compressor maximises chiller efficiency

Oil in HVAC Systems results in Efficiency Losses:

• An ASHRAE determined the average quantity of oil as a percentage of in older chiller. This found the average to be 12.88%
• A study determined that even at 3.5% of oil equated to an 8% efficiency loss
• Thus, oil free compressors stand to benefit to a large extent due to the absence of oil

Efficiency Advantage :

• Single stage compressor design
• Optimized impeller designs
• High efficiency, refrigerant cooled motors
• Free standing Variable Frequency Drive
• Frictionless compressor bearings minimize efficiency Loss
• Easily meeting BEE 5–Star Rating: ISEER 9.87 to 10.0
• IPLV @ AHRI conditions < 0.30 IkW/TR
• Capable of operating at a high lift condition, such as high condensing or low leaving chilled water
• Advance component designs - Internally and externally enhanced copper tube for high heat transfer coefficients
• Options of alternative materials - Cupro Nickel, SS & Titanium for sea water / corrosive applications

Unloading Advantage:

• Combination of Inlet Guide Vane and VFD control
• Excellent stability at lower loads
• Movable discharge diffuser to avoid surging at low load and high lift conditions
• Electronic expansion Valve provides superior refrigerant flow control over a range of operating conditions
• Provides excellent part load efficiency

Speed Advantage:

• Gear-driven, high-speed impeller allows for size and weight reduction
• Magnetic bearings with no friction increase life of the compressor
• Lower vibrations levels
• The compressor speed adjusts automatically to match the load and current operating conditions so that optimum efficiency is gained
• High operating speeds – between 12,000 and 24,000 rpm

Reliability Advantage:

• Bearings capable of handling high thrust & radial loads, can handle any shocks / surge conditions without damage
• Permanent Magnet Motor, designed for 20,000 rpm speed, capable of easily handling power fluctuations
• VFD designed for high switching frequency considering the requirements of Permanent Magnet motor
• Precise stepper motor driven IGV operation with runtime auto calibration
• Totally enclosed IGV operating mechanism
• Sine Wave filters used to smoothen the power supply, minimizes the effect of voltage fluctuations
• Default Quick Start option
• Compressors are field-serviceable with site-serviceable IGV, only OEM to have facility for Compressor service in India with all parts being available from the plant in India
• Default capability of Screen Cloning on network PC through ethernet

Coast Down Mechanism

• Within 0.5 of a micro-second, the motor becomes a generator to power the bearings to a controlled coast-down. The onboard capacitors have enough power to fully support the bearing system during the switch from motor to generator mode.
• Shaft will rest on the back up bearings, which are made of composite material.

Heat Exchangers

• Internally and externally enhanced tubes for high heat transfer coefficients
• Options of alternative materials – Cupro-Nickel, SS & Titanium for sea water / corrosive applications
• Heat exchangers designed, manufactured & tested in accordance with ASME, certified welders
• Inspection and testing at every stage
• Option of heat exchangers with ASME U stamping / PED certifications

Operation Advantage:

• A user-friendly, 15” touch screen HMI with 1280 x 800 dpi resolution provides the operator with essential information about operating parameters, alarms and trips.
• IoT enabled, to collect operating data, web-based monitoring, alarm pre-alerts etc. which improves overall uptime

Performance Advantage:

• All Chiller factory run-tested as standard, on AHRI Certified Test Facility
• Factory operational test at full load design conditions
• Can offer witness testing at full load / part load points - ensures correctness of capacity and efficiency