York R-407C Reliable Scroll Compressor Technology, Serviceability, Install with Ease and Safety

Page 5

FORM 100.50-EG1

•Enhanced filtration – The Eco2 unit gives design- ers the flexibility to meet various IAQ requirements with a full range of rigid and throwaway filters at various efficiency levels.

Reliable Scroll Compressor Technology

Reliable, efficient, trouble-free operation is the true mea- sure of a packaged rooftop’s value. That’s why YORK Eco2 Packaged Rooftop Air Conditioners use estab- lished scroll-compressor technology to deliver depend- able, economical performance in a wide range of appli- cations. With the Eco2 Packaged Rooftop, you get the latest generation of compressor enhancements added to the scroll’s inherent strengths. The simplicity of a hermetic scroll compressor allows the use of fewer moving parts to minimize breakdown. YORK also em- ploys the latest sealing technology to avoid metal-to- metal contact. Axial sealing is accomplished with float- ing tip seals, while radial sealing utilizes a microcushion of oil. The result: a maintenance-free compressor pro- viding minimum wear and maximum runtime.

A scroll compressor operates with two scroll members— a fixed scroll and an identical orbiting scroll turned 180 degrees, like two hands curled and interlocked together. As the orbiting scroll oscillates against the fixed scroll, it traps and compresses suction gas inside involute pockets. As the orbiting scroll moves, the gas is com- pressed into the central area, where it is discharged as compressed gas. High efficiency is achieved through a precisely controlled orbit and the use of advanced scroll geometry. There is no wasted motion. All rotating parts are statically and dynamically balanced to ensure opti- mal performance over the long haul.

Balanced components and precision machining also ensure that smooth compression occurs in all involute pockets simultaneously. When compression forces are equally distributed over the entire scroll surface, equal forces in opposing directions cancel one another, mini- mizing any imbalance. Consequently, compression is smooth, continuous, and quiet. Vibration isolators on each compressor handle normal vibration. For extra quiet operation, acoustic sound blankets for each com- pressor are available as options.

Serviceability

•OptiLogicTM – fully-integrated factory-packaged controls are standard on every unit and include a display unit with a 4x20 character LCD display. OptiLogicTM continually monitors all control setpoints and configurations. If a unit or control component, or sensor fails, the controller notifies the user of a problem. If desired, YORK service can provide re- mote monitoring and automatically schedule a ser- vice technician to make the repair and maintain your comfort.

•Access doors – full-sized access doors provide easy access into the unit for routine maintenance and inspection.

•Suction & discharge service valves – oversized service valves to provide isolation and quick recla- mation and charging of system refrigerant are avail- able to minimize downtime and simplify the service and repair task.

•VFD Fan Motor Control with Manual Bypass – Optional manual VFD bypass reduces time required for troubleshooting, commissioning and system balancing.

•Convenience Outlet – for maintenance tasks re- quiring power tools, an optional 110V GFCI power supply can power lights, drills or any other power hand tool needed.

•Filter Maintenance Alarm – An optional filter main- tenance alarm indicates when a filter becomes dirty and requires replacement or cleaning.

Install with Ease and Safety

•Factory run-tested – Each unit is subjected to a series of quality assurance checks as well as an automated quality control process before being run- tested. Fans and drives are balanced at the factory during testing. The factory run-test ensures safe, proper operation when the unit is installed and re- duces installation and commissioning time.

•Single-point power connection – Single-point power connection reduces installation time by pro- viding a single point for incoming power, including

YORK INTERNATIONAL

5

Page 4 Page 6
Image 5
Page 4 Page 6
Contents 407C Optimized Through 65 Tons Packaged Rooftop Air Conditioning UnitsTable of Contents Basic Model Number NomenclatureEcological and Economical Design FEATURES/BENEFITSIntroduction Reliable Scroll Compressor Technology ServiceabilityInstall with Ease and Safety Introduction Physical Data Physical DataPhysical Data Cont’d Location Application DataRigging EconomizerRoof Curb Harsh Environments Condenser and Evaporator Coil ProtectionBuilding Exhaust Systems Acoustical Considerations Selection ProcedureGiven Select UnitCooling Performance Data 50 TON Model Cooling Performance Data 50 Ton ModelCooling Performance Data 50 TON Model CONT’D Cooling Performance Data 55 TON Model Cooling Performance Data 55 Ton ModelCooling Performance Data 55 TON Model CONT’D Cooling Performance Data 60 TON Model Cooling Performance Data 60 Ton ModelCooling Performance Data 60 TON Model CONT’D Cooling Performance Data 65 TON Model Cooling Performance Data 65 Ton ModelCooling Performance Data 65 TON Model CONT’D 50 Through 65 TON Supply FAN Data CONT’D Fan Performance50 Through 65 TON Supply FAN Data 50 Through 65 TON Exhaust FAN Data Component Static Pressure Drops Inches of Water Column Filters Economizer Economizer Dampers Rigid Filter Manual or Electrical Data Electrical Service SizingLoad Definitions CompressorsHigh Efficiency Supply and Exhaust FAN Motor ODP or TefcPremium Efficiency Condenser FAN Motors / EachControls Unoccupied / Occupied SwitchingControl Sequences for ALL Units GeneralExhaust Control Sequences Ventilation Control SequencesSmoke Purge Sequences LOW Ambient OperationCooling Operation VAV Specific SequencesCV Specific Sequences Stand Alone ControlCooling Operation Thermostat Control Stage 1 Y1 CallSINGLE-POINT Power Supply Wiring Power WiringSINGLE-POINT Power Supply Wiring with NON-FUSED Disconnect SINGLE-POINT Power Supply Wiring With NON-FUSED DisconnectDUAL-POINT Power Supply Wiring DUAL-POINT Power Supply WiringField Control Wiring Field Control WiringBottom Supply Bottom Return General ArrangementDrawing General Arrangement Drawing Left or Right Rear Return SupplyCurb Layout Drawing Curb Layout DrawingConstruction Guide SpecificationsSupply AIR System Bearings and DrivesAIR Filtering System Power SupplyAIR Inlet System Refrigeration SystemEconomizers Accessories and OptionsControls Evaporator Coil Protection Relief SystemCondenser Coil Protection Suction and Discharge Pressure Transducers moniYork International York International Proud Sponsor Olympic Team
Top Page Image Contents