York CU060 Installation Instruction

Contents

York CU060 Installation Instruction Manual pdf 3 page image

036-33072-001 Rev. A (0601)Unitary Products Group 3GENERALOur units are designed to accommodate the ever-changinginstallation requirements of today's market. All models 5 -25tons are shipped as factory-charged unitized packages.These units are designed to allow easy passage throughdoors, hallways and elevators. All models are designed forfree-standing mounting on the floor. All unit components aresecurely mounted inside the heavy gauge "Galvalume" steelcabinet. All units are lined with 1/2" thick -2 Ib density acous-tical insulation to ensure the quietest operation. All modelsare provided with medium- efficiency 2" thick throwaway fil-ters. All models are shipped with vertical evaporator fan dis-charge as standard. The evaporator fan dischargeconfiguration is field convertible on all units. An optional dis-charge plenum is available for horizontal 'free-blow' applica-tions.The 5 ton model has a single refrigerant circuit. The 8through 20 ton models are dual compressor units with twoindependent compressor/condenser circuits. The 25 tonmodel has three independent compressor/condenser circuits.Evaporator coils are of copper tube and rippled aluminumplate fin construction. The high-efficiency tube-in-tube con-densers feature a convoluted inner tube design for optimumperformance. Standard models feature a copper inner tubesurrounded by a steel outer tube, and carry a 400 psig work-ing pressure rating. Multiple refrigerant circuit models featureinternally manifolded condensers (single water in, water outconnection).High efficiency Scroll compressors are used in all models,mounted on durable rubber isolators to reduce vibration andnoise while operating. Each refrigerant circuit is equippedwith high pressure and low pressure switches. All models areequipped with an adjustable thermal expansion valve (withexternal equalizer), one valve per circuit. Each refrigerant cir-cuit is also equipped with a liquid line filter drier, sight glass/moisture indicator, and service access ports. An electricallyre-setable lock-out relay will shut off the compressor in theevent of pressure switch trip during operation. Control circuitoperates on 24V, and features an oversized transformer.Optional anti-short circuit timers can be field/factory installed.Installation time is minimized with all models. When planningan installation consider power supply, thermostat, conden-sate drain line, duct run, and service clearances. A remotethermostat device is field supplied and installed to control theunit operation. Attachments to the unit include the bolt-on fil-ter frame (20 and 25 ton only), and factory supplied dischargeduct flanges.Service access doors are equipped with lifting handles, andare located on all sides of the unit to allow easy servicing ofall components. The compressor access door is supplied withknock-outs allowing gauge lines to be installed and readingsto be taken with the machine in operation. In addition thereare removable viewing ports to allow observation of the sightglass without removing the access door.All units are equipped with centrifugal blowers combined withvariable pitch adjustable pulleys. Forward curved doublewidth, double inlet blowers are used for evaporator air move-ment. All models employ a draw-through air flow arrange-ment. Large evaporator coil face areas reduce noise levels,air pressure drops, and minimize potential condensate blow-off .All blower wheels are galvanized steel, with solid steelshafts supported in permanently lubricated ball bearings. V-belts drive all models and blower RPM can be adjustedthrough the motor sheave.ONLY QUALIFIED PERSONNEL SHOULD PER-FORM INSTALLATION AND SERVICE OF UNITS.CAUTION