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Model CYK Compound Centrifugal Liquid Units Style G
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Model CYK Compound Centrifugal Liquid Units Style G - 1

Model CYK Compound Centrifugal Liquid Units Style G Cooling Duty: 300 through 2,500 Tons (1,050 through 8,800 kW) Heating Duty: 10,000 through 40,000 MBH (2,900 through 11,700 kW) Air-cooled Radiators, Brine-chilling and Heat Pump Applications 50 and 60 Hz Utilizing R-134a

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Cooler Code Condenser Code Low Stage Compressor Code High Stage Compressor Code Design Level High Stage Motor Code Low Stage Motor Code Power Supply 5 for 50Hz JOHNSON CONTROLS

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Introduction The YORK® Compound YK Unit (CYK) is a design using two centrifugal compressors arranged in series to handle radiator-cooled, brine-chilling, and heat-pump applications at conditions outside the range of typical centrifugal units. These custom units use R-134a refrigerant and are available in a wide range of capacities: • For air-cooled applications, (air-cooled radiators) 600 to 2,500 tons up to 155°F LCWT (2,100 to 8,800 kW up to 68°C LCWT). • For brine chilling, 300 to 2,000 tons (1,050 to 7,000 kW). Brine temperatures as low as 0°F (-18°C) • For heat pump applications,...

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Introduction smoothly from 100% to minimum load for excellent operation in all applications. PRECISION CONTROL OF COMPRESSOR OIL PRESSURE Using our expertise in variable-speed drive technology and applications, Johnson Controls has moved beyond the fixed head and bypass approach of oil pressure control. The old approach only assures oil pressure at the outlet of the pump rather than at the compressor, and allows no adjustment during unit operation. The CYK units feature two variablespeed drive oil pumps, monitoring and providing the right amount of oil flow to each compressor on a...

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Sustainability Focus OZONE-DEPLETION POTENTIAL (ODP) The YORK CYK unit employs one the most environmentally friendly refrigerants available today, HFC-134a, with no Ozone Depletion Potential (ODP) and no phase out date per the Montreal Protocol. Ozone is a very small part of the atmosphere, but its presence is nevertheless vital to human well-being. Most ozone resides in the upper part of the atmosphere. This region, called the stratosphere, is more than 10 kilometers (6 miles) above the Earth’s surface. There, about 90% of atmospheric ozone is contained in the “ozone layer,” which shields...

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Sustainability Focus two categories of refrigerants listed in the table. Manufac- turers in developed nations are in the final processes of converting from HCFC's to HFC's in accordance with the Montreal Protocol treaty. Markets in developing countries are already seeing a transition away from HCFC's ahead HCFC's were used as a transitional refrigerant as they were a "Lesser Evil" and allowed the HVAC industry to quickly transition away from CFCs while maintaining energy efficiency. The fact remains that they destroy the ozone layer and are legislated to be completely phased The Montreal...

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Equipment Overview GENERAL YORK CYK Compound Centrifugal Liquid Units are factory-packaged including the evaporator, condenser, compressor, motor, lubrication system, control center, and interconnecting unit piping and wiring. The flash economizer (intercooler) ships loose for assembly with the unit at time of installation. All piping between the economizer and the units is prefabricated in the factory. No welding is required in the field. The initial charge of refrigerant and oil is supplied for each unit. Actual shipping procedures will depend on a number of project-specific details....

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Equipment Overview LUBRICATION SYSTEM HEAT EXCHANGERS Lubrication oil is force-fed to all bearings, gears and rotating surfaces by a variable speed drive pump; which operates prior to startup, and continuously during operation and during coast-down. A gravity-fed oil reservoir is built into the top of each compressor to provide lubrication during coast-down in the event of a power failure. Dual oil reservoirs, separate from the compressors, contain the 2 HP submersible oil pumps and 1500 watt immersion-type oil heaters for each compressor. The oil heaters are thermostatically controlled to...

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WATER BOXES ISOLATION MOUNTING The removable water boxes are fabricated of steel. The design working pressure is 150 psig (10.3 barg) and the boxes are tested at 225 psig (15.5 barg). Integral steel water baffles are located and welded within the water box to provide the required pass arrangements. Stub-out water nozzle connections with ANSI/AWWA C-606 grooves are welded to the water boxes. These nozzle connections are suitable for ANSI/AWWA C-606 couplings, welding or flanges, and are capped for shipment. Plugged 3/4” drain and vent connections are provided in each water box. The unit is...

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Unit Components JOHNSON CONTROLS

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Quantum LX Control Center QUANTUM LX CONTROL CENTER The unit is controlled by a stand-alone QuantumLX microprocessor-based control center with a Linux-based operating system. The unit control center provides all the necessary controls and control logic to provide automatic start-up, automatic operation, capacity control and safety protection of the unit. CONTROL PANEL The control panel includes a 10.4” color active matrix MFD with integral keypad for operator interface. The control panel is a factory wired, unit mounted, NEMA 12, gasketed enclosure. The panel is fabricated of 10 gauge steel...

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Quantum LX Control Center production of chilled water in the interests of keeping the unit online. HEAT PUMP The Heat Pump is limited to produce heat on the available heat extracted from the chilled water loop. If there is insufficient load on the chilled water loop, then hot gas will generate as much heat as it can to make up the lack of source heat from the chilled loop. More importantly the Heat Pump must have sufficient load on the condenser (heating) side to carry away the heat of compression of the system. The Design working pressure of the condenser vessel is the limiting factor of...

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Digital Output List 1. Low Stage Liquid Line Solenoid Valve 2. High Stage Liquid Line Solenoid Valve 3. High Stage Oil Return Solenoid (brine units only) 4. Low Stage Oil Return Solenoid Valve 5. Low Stage Compressor Oil Heater Contactor 6. High Stage Compressor Oil Heater Contactor 7. Low Stage Compressor Motor Start/Stop Control Relay 8. High Stage Compressor Motor Start/Stop Control Relay 9. Low Stage Compressor Oil Pump Start/Stop Relay 10. High Stage Compressor Oil Pump Start/Stop Relay 11. Oil Level Control Pump Start/Stop Relay (brine units only) 12. Open Low Stage PRV 13. Open High...

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