York HA300 Technical Manual

Contents

TECHNICAL GUIDESPLIT-SYSTEMAIR-COOLED CONDENSING UNITSHA300, HB360, HB480 & HB60025 thru 50 NOMINAL TONS(50 Hz)ISO 9001Certified QualityManagement System036-21345-001-B-0105FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE®DESCRIPTIONThese units are completely assembled, piped and wired at the factoryto provide one-piece shipment and rigging. Each unit is pressurizedwith a holding charge of refrigerant-22 for storage and/or shipping.The compact design, clean styling, low silhouette, and quiet operationmake these condensing units suitable for almost any outdoor location.On rooftops . . . because they weigh much less than a single packageunit of similar capacity and are much easier to rig and support. Atground level . . . because their ample sub-cooling capacity allows themto be located three or more stories below the evaporator coil.Every condenser coil is pressurized with air to 325 psig and leaktested under water. After assembly, the unit is pressurized with a com-bination of refrigerant-22 and nitrogen to 450 psig for pressure testingand additional leak testing. During this pressure test, the operation ofthe high pressure control is checked. As the unit is being evacuatedand dehydrated, the operation of the low pressure control is checked.Every compressor, condenser fan motor, crankcase heater, and elec-trical control circuit is checked to assure a trouble-free start-up andyears of reliable operation.The condenser fan guards are vinyl-coated to provide additional rustprotection and to enhance the appearance of the unit.Compressors are mounted on rubber isolators to reduce the transmis-sion of vibration. Vertical discharge condenser fans direct soundupward and away from any surrounding structures.All sheet metal parts are constructed of commercial grade (G90) gal-vanized steel. After fabrication, each part is thoroughly cleaned toremove any grease or dirt from its surfaces. The external parts arecoated with a powder paint to assure a quality finish for many years.This UL approved coating system has passed the 1000 hour, 20% saltspray test per ASTM Standard B117.A matching line of Evaporator Blower units is also offered to meet yourprecise capacity and air handling requirements.