036-21217-001-B-1203  
					charge are provided with the unit, for field installation. Duct  
					flange on CU240 evaporator return is incorporated into the fil-  
					ter frame.  
					DESCRIPTION  
					These units are completely assembled, piped, wired, charged  
					and tested at the factory and are shipped ready for immediate  
					installation. Only the power supply wiring, the thermostat wir-  
					ing, the condenser water piping, the condensate drain piping  
					and the ductwork are required to complete the installation.  
					REFRIGERATION CIRCUITS  
					All models utilize "Scroll" type hermetic compressors. Com-  
					pressors are mounted on rubber isolators to minimize vibra-  
					tion transmission. Internal overload protection is provided.  
					External high pressure and low pressure cutout switches are  
					included in each compressor control circuit. The 5 ton units  
					have a single refrigeration circuit. The 8 -20 ton units feature  
					two independent refrigeration circuits. Each refrigeration cir-  
					cuit includes an adjustable thermal expansion valve (with  
					external equalizer), liquid line filter drier, sight glass/moisture  
					indicator, and service gauge ports.  
					Units include a one-year limited warranty on all replacement  
					parts and a five-year limited warranty on each compressor.  
					APPLICATION FLEXIBILITY  
					These ìcooling onlyî units can be applied with:  
					1. Cooling towers.  
					2. Well or surface water providing the temperature and the  
					GPM of the water meet the application limitations of the  
					unit.  
					The evaporator coils are constructed of internally enhanced  
					copper tubes mechanically bonded to rippled aluminum plate  
					fins. The evaporator coil is employed in a draw-through con-  
					figuration, and features inter-laced circuiting. Large evapora-  
					tor coil face area minimizes potential water blow-off.  
					3. Brackish or salt water and a secondary heat exchanger.  
					They can be installed:  
					The high-efficiency tube-in-tube condensers feature a convo-  
					luted inner tube design for optimum performance. Standard  
					models feature a copper inner tube surrounded by a steel  
					outer tube, and carry a 400 psig working pressure rating.  
					1. Within the conditioned space as ìfree standingî units  
					without any ductwork. Supply air plenum and return air  
					grille accessories are available for these freestanding  
					applications.  
					2. In an equipment room with both supply and return air  
					ductwork  
					INDOOR FANS  
					GENERAL  
					Forward curved, double inlet and double width centrifugal  
					blowers are used for evaporator air movement. Large diame-  
					ter wheels are employed to provide required airflow perfor-  
					mance at minimum rpm and noise levels. Blower wheels are  
					fabricated of galvanized steel. Blowers employ solid steel  
					shafts, supported in permanently lubricated ball bearings. All  
					blowers are belt driven. Variable-pitch motor sheaves allow  
					for field adjustment of blower rpm.  
					Horizontal (CH) units are designed for suspended mounting.  
					HWC models are shipped with ëstraight-throughí evaporator  
					fan discharge as standard. Airflow orientation is field convert-  
					ible to side discharge. Vertical (CU) units are designed for  
					free-standing floor mounting. All units are completely factory  
					wired and pre-piped. Water supply, water outlet, and conden-  
					sate drain connections are via female pipe thread fittings.  
					All models 5 -25 tons ship as factory-charged unitized pack-  
					ages. The 5 -15 ton units may be field split between the evap-  
					orator /compressor section and the upper blower section;  
					installation is possible through standard height doorways and  
					elevators. All packages are designed for free-standing floor  
					mounting. All models are shipped with vertical evaporator fan  
					discharge as standard. Units are completely factory wired  
					and piped. Dual circuit models feature internally manifolded  
					condensers.  
					ELECTRICAL/CONTROLS  
					All units are completely factory wired with all necessary con-  
					trols. Manual reset protection is provided on evaporator  
					blower motors. A manual reset circuit is also provided on  
					each compressor control circuit in the event of high/low pres-  
					sure cutout. A 24 volt control circuit, with oversize trans-  
					former, is provided for field connection. Units are designed to  
					operate with conventional thermostat control interface.  
					CABINET  
					FILTERS  
					All cabinets are completely constructed of 18 Ga. corrosion  
					resistant "Galvalume" coated steel. The entire unit interior  
					(both evaporator and condensing section) is insulated with  
					1/2" thick, 2 lbs. density insulation. Service panels are  
					equipped with lifting handles for ease of removal and han-  
					dling. Duct flanges for return air intake and evaporator dis-  
					All models are shipped with 2 inch thick medium-efficiency  
					throwaway filters factory installed. Filters are accessible from  
					either front or right side on 5-15 ton models. The CU240 filter  
					rack is external to the cabinet (shipped loose).  
					Unitary Products Group  
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