Un-Used Series CXV Evaporative Condenser

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1 Un-Used Series CXV Evaporative Condenser Mfg: Baltimore Aircoil Company Stock No. NBAC01. Model: CXV-253 Serial No. Un-Used Baltimore Aircoil Company CXV Evaporative Condenser. Model CXV-253. BAC Series CXV delivers fully rated thermal performance over a wide range of heat rejection and temperature requirements for various refrigerants. Standard design features satisfy today s environmental concerns, minimize installation costs, maximize year-round operating reliability, and simplify maintenance requirements. CXV Evaporative Condensers Reduced Refrigerant Charge Low Energy Consumption Low Installed Cost Easy Maintenance Reliable Year-Round Operation Long Service Life ASME B31.5 Compliant Coils Five-Year Warranty on Mechanical Equipment Model 70 F WB 70 F WB 75 F WB 75 F WB 78 F WB 78 F WB 80 F WB 80 F WB CXV , , , ,472.8

2 CXV Evaporative Condensers F35 Product Detail Product Introduction F36 Benefits F38 Construction Details F40 Custom Features & Options F44 Evaporative Condensers Accessories F47 Engineering Data F50 Structural Support F55 Engineering Specifications F56 Engineering Considerations F58

3 F36 CXV Evaporative Condensers CXV Single Model Capacity: 64 1,888 Nominal R-717 Tons (81 2,390 Nominal R-22 Tons) CXV Evaporative Condensers deliver fully rated thermal performance over a wide range of heat rejection and temperature requirements for various refrigerants. Standard design features satisfy today s environmental concerns, minimize installation costs, maximize year-round operating reliability, and simplify maintenance requirements. CXV Evaporative Condensers Reduced refrigerant charge Low energy consumption Low installed cost Easy maintenance Application flexibility Reliable year-round operation Long service life ASME B31.5 compliant coils Five-year warranty on mechanical equipment Baltimore Aircoil Company

4 Evaporative Condensers F37...because temperature matters

5 F38 Benefits Reduced Refrigerant Charge CXV Combined flow technology provides maximum capacity at the lowest refrigerant charge available in the industry. Reduced refrigerant charge lowers installation costs and may help satisfy refrigerant charge thresholds. * For more information on combined flow technology, see pages F1. Operating Charge CXV Others Others Low Energy Consumption Evaporative cooling equipment minimizes the energy consumption of the entire system because it provides lower operating temperatures. The owner saves money while conserving natural resources and reducing environmental impact. Evaporative condensers provide lower condensing temperatures and can offer significant horsepower savings over conventional air-cooled and water-cooled condensing systems. The CXV provides heat rejection at the lowest possible energy input and maintenance requirements via: High efficiency, low horsepower axial fans Patented combined flow technology, which reduces evaporation directly off the coil, minimizing the potential for scaling and fouling Parallel flow of air and spray water, which eliminates scale-promoting dry spots Variable Frequency Drives ENERGY-MISER Fan System available (see page F45 for details) Low Installed Cost Support All models mount directly on parallel I-beams and ship complete with motors and drives factory-installed and aligned. Modular Design Units ship in multiple sections to minimize the size and weight of the heaviest lift, allowing for the use of smaller, less costly cranes. Coil Connections Fewer coil connections reduce costs of pipe, valves, purgers, and labor. Baltimore Aircoil Company

6 F39 Easy Maintenance Access - Hinged access doors on each end wall provide easy access to the unit interior. In addition, all single air inlet models (CXV-64 thru -962 and CXV-N465 thru -N687) are provided with an internal walkway as standard. An internal walkway is available as an option on CXV-T models. Spacious Interior Provides easy access to the cold water basin, drift eliminators, fan drive system and condensing coil. Access to Spray Distribution Parallel flow of air and spray water over the coil allows for inspection and access to the top of the coil during full operation. Application Flexibility Replacement applications Single air inlet models are designed to mount directly on existing support steel of both crossflow and counterflow units. Coil configurations Alternate coil configurations and materials available. ASME U Stamp available (see page F44 for details). Highest capacity in the industry CXV-T models offer the highest single cell capacity of any evaporative condenser in the industry. Projects benefit from fewer required cells, lower overall fan horsepower, and fewer piping connections. Reliable Year-Round Operation BALTIDRIVE Power Train Backed by a five-year fan drive and motor warranty, the BALTIDRIVE Power Train utilizes special corrosion-resistant materials of construction and state-of-the-art technology to ensure ease of maintenance and reliable year-round performance. Separate Air Inlet Louvers Reduce the potential for scale build-up and damaging ice formations at the air/water interface by providing a line of sight from the outside of the unit into the fill. Oversized, hinged access door Drift eliminators can be removed for additional access to the condensing coil Evaporative Condensers Long Service Life Materials of Construction Various materials are available to meet the corrosion resistance, unit operating life, and budgetary requirements of any project (see page F44 for construction options). Spray distribution system...because temperature matters

7 F40 Construction Details CXV Models CXV Baltimore Aircoil Company

8 F41 1 Heavy-Duty Construction G-235 (Z700 metric) hot-dip galvanized steel panels 2 BALTIDRIVE Power Train Premium quality, solid-backed, multi-groove belt Corrosion resistant cast aluminum sheaves Heavy-duty bearings (280,000 hour average life) Cooling tower duty fan motor Five-year motor and drive warranty 3 Low HP Axial Fan(s) Quiet operation Corrosion resistant aluminum 4 Water Distribution System Visible and accessible during operation Overlapping spray patterns ensure proper water coverage Large orifice, non-clog nozzles 5 Coil Section (Not Shown) Continuous serpentine, steel tubing Hot-dip galvanized after fabrication (HDGAF) Pneumatically tested at 375 psig Sloped tubes for free drainage of fluid ASME B31.5 compliant Orders shipping into Canada are supplied with a CRN 6 BACross Wet Deck Surface with Integral Drift Eliminators (Not Shown) Polyvinyl chloride (PVC) Impervious to rot, decay and biological attack Flame spread rating of 5 per ASTM E84-77a 7 FRP Air Inlet Louvers Corrosion resistant UV resistant finish Maintenance free 8 Cold Water Basin Sloped cold water basin for easy cleaning Suction strainer with anti-vortex hood accessible from louver face Adjustable water make-up assembly accessible from louver face Integral internal walkway 9 Recirculating Spray Water Pump Close coupled, bronze fitted centrifugal pump Totally enclosed fan cooled (TEFC) motor Bleed line with metering valve installed from pump discharge to overflow Hinged Access Doors Inward swinging door on each end wall Evaporative Condensers...because temperature matters

9 CXV F42 Construction Details CXV-T Models Baltimore Aircoil Company

10 F43 1 Heavy-Duty Construction Heavy-gauge steel frame 2 FRP Casing Panels Corrosion resistant Maintenance free UV resistant finish 3 BALTIDRIVE Power Train Premium quality, solid backed, multi-groove belt Corrosion resistant cast aluminum sheaves Heavy-duty bearings (280,000 hour average life) Cooling tower duty fan motor Five-year motor and drive warranty 4 Low HP Axial Fan Quiet operation Corrosion resistant aluminum 5 Water Distribution System Visible and accessible during operation Overlapping spray patterns ensure proper water coverage Large orifice, non-clog nozzles 6 Coil Sections Continuous serpentine, steel tubing Hot-dip galvanized after fabrication (HDGAF) Pneumatically tested at 375 psig Sloped tubes for free drainage of fluid ASME B31.5 compliant Orders shipping into Canada are supplied with a CRN 7 BACross Wet Deck Surface with Integral Drift Eliminators Polyvinyl chloride (PVC) Impervious to rot, decay and biological attack Flame spread rating of 5 per ASTM E84-77a 8 FRP Air Inlet Louvers Corrosion resistant UV resistant finish Maintenance free 9 Cold Water Basin Sloped cold water basin for easy cleaning Suction strainer with anti-vortex hood Adjustable water make-up assembly Integral Recirculating Spray Water Pumps (Not Shown) Close coupled, bronze fitted centrifugal pumps Totally enclosed fan cooled (TEFC) motors Bleed line with metering valve installed from pump discharge to overflow 11 Hinged Access Doors (Not Shown) Inward swinging door on each end wall Evaporative Condensers...because temperature matters

11 F44 Custom Features and Options Construction Options CXV Standard Construction: All Models: All steel panels and structural elements are constructed of heavy-gauge G-235 hot-dip galvanized steel. Inlet louvers are constructed of UV-resistant, fiberglass reinforced polyester (FRP). CXV-T Models: Casing panels are constructed of UV-resistant, fiberglass reinforced polyester (FRP). Optional BALTIBOND Corrosion Protection System: The BALTIBOND Corrosion Protection System, a hybrid polymer coating used to extend equipment life, is applied to all hot-dip galvanized steel components of the evaporative condenser (excluding condensing coil). Optional Stainless Steel Cold Water Basin: A Type 304 stainless steel cold water basin is available. Seams between panels inside the cold water basin are welded. The basin is leak tested at the factory and welded seams are provided with a five-year leak-proof warranty. Optional Stainless Steel Construction: Steel panels and structural elements are constructed of Type 304 stainless steel. Seams between panels inside the cold water basin are welded. The basin is leak tested at the factory and welded seams are provided with a five-year leak-proof warranty. Factory Mutual Approval: All multi-cell units are available with Factory Mutual (FM) Approved construction as an option. See page J4 for more details on the materials described above. Coil Configurations Standard Serpentine Coil: The standard condensing coil is constructed of continuous lengths of all prime surface steel, hot-dip galvanized after fabrication (HDGAF). Optional Stainless Steel Coil: Coils are available in Type 304 stainless steel for specialized applications. Optional ASME U Stamp Coil: This coil meets the requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, and bears the ASME U stamp. ASME coils are hot-dip galvanized after fabrication (HDGAF). All coils are designed for low pressure drop with sloping tubes for free drainage of fluid. Each coil is pneumatically tested at 375 psig (2586 kpa) and is ASME B31.5 compliant. Orders shipping into Canada are supplied with a CRN. Other coil configurations are available for specific applications. Contact your local BAC Representative for details. Baltimore Aircoil Company

12 F45 Fan Drive System The fan drive system provides the cooling air necessary to reject unwanted heat from the system to the atmosphere. The standard fan drive system on all models is the exclusive BALTIDRIVE Power Train. This BAC engineered drive system consists of a specially designed powerband and two cast aluminum sheaves located on minimum shaft centerline distances to maximize belt life. A cooling tower duty fan motor, custom engineered for BAC to provide maximum performance for evaporative cooling service, is provided and backed by BAC s comprehensive five-year motor and fan drive warranty. ENERGY-MISER Fan System The ENERGY-MISER Fan System consists of two standard single-speed fan motor and drive assemblies. One drive assembly is sized for full speed and load, and the other is sized approximately 2/3 speed and consumes only 1/3 the design horsepower. This configuration allows the system to be operated like a two-speed motor, but with the reserve capacity of a standby motor in the event of failure. As a minimum, approximately 70% capacity will be available from the ENERGY-MISER low horsepower motor, even on a design wet-bulb day. Fan System Controls and wiring are the same as those required for a two-speed, two-winding motor. Significant energy savings are achieved when operating at low speed during periods of reduced load and/or low wet-bulb temperatures. Independent Fan Operation Models CXV-3 thru -962 and CXV-N465 thru -N687 are provided with one fan motor driving multiple fans as standard. The Independent Fan option consists of one fan motor and drive assembly for each fan to allow independent operation, adding redundancy and an additional step of capacity control. Low Sound Operation The low sound levels generated by CXV Evaporative Condensers make them suitable for installation in most environments. For very sound sensitive installations, a low sound fan option is available to significantly reduce the sound levels generated from the unit with minimal impact on thermal performance. Evaporative Condensers For extremely sound sensitive installations, factory designed, tested and rated sound attenuation is available for both the air intake and discharge. Unit with intake and discharge sound attenuation...because temperature matters

13 F46 Custom Features and Options Gear Drive System, Externally Mounted Motor (CXV-T Models Only) CXV CXV-T Models are available with a gear drive system with external TEFC motor. A non-corrosive carbon-fiber composite drive shaft with stainless steel hubs is selected with a 2.0 service factor. The motor and drive shaft ship separately for easy field installation. Gear Drive System, Externally Mounted Motor Gear Drive System, Close-Coupled Motor (CXV-T Models Only) CXV-T Models are available with a close-coupled gear drive system. Both the gear drive and couplings are selected with a 2.0 service factor. Gear construction includes a nickel-alloy steel shaft, casehardened gears, self lubrication, and a single piece, gray iron housing. This drive system ships completely installed and aligned. Gear Drive System, Close-Coupled Motor Basinless Unit Construction (CXV-T Models Only) The basinless unit construction option enables units to be directly applied to new or existing concrete cold water basins. This custom feature, available exclusively on BAC CXV-T evaporative condensers, reduces maintenance costs by eliminating the integral basin from traditional units. It simplifies piping and pumping requirements of multi-cell installations and provides a cost-effective solution for many field-erected replacement projects. CXV-T installation on a concrete basin Baltimore Aircoil Company

14 F47 Accessories External Service Platforms For external service, louver face and access door platforms can be added to the unit when purchased or as an aftermarket item. Safety gates are available for all handrail openings. All components are designed to meet OSHA requirements. Ladder, Safety Cage, Safety Gate and Handrails (CXV-T Models Only) In the event the end-user elects to provide access to the fan deck, CXV-T models can be furnished with ladders extending from the top of the unit to the base, as well as safety cages, safety gates, fan deck extensions and handrail packages. All components are designed to meet OSHA requirements. All access to the top of the equipment must be made in accordance with applicable governmental occupational safety standards. NOTE: Partial or full grating above the coil air intake is recommended with this option Internal Ladder For access to the motor and drive assemblies on models CXV-64 thru -962 and CXV-N465 thru -N687, an internal ladder is available. Internal Service Platforms For access to the motor and drive assemblies on models CXV-196 thru -962, CXV-N465 thru -N687, and all CXV-T models, an upper service platform with ladder and handrails is available. Safety gates are available for handrail openings. All components are designed to meet OSHA requirements. External platform at louver face with ladder and safety cage Evaporative Condensers Internal ladder and service platform...because temperature matters

15 F48 Accessories Vibration Cutout Switch CXV A factory mounted vibration cutout switch is available to effectively protect against equipment failure due to excessive vibration of the mechanical equipment system. BAC can provide either a mechanical or solid-state electronic vibration cutout switch in a NEMA 4 enclosure to ensure reliable protection. Additional contacts can be provided to activate an alarm. Basin Heaters Evaporative condensers exposed to below freezing ambient temperatures require protection to prevent freezing of the water in the cold water basin when the unit is idle. Factory-installed heaters, which maintain +40 F (4.4 C) water temperature, are a simple and inexpensive way of providing such protection. 0ºF (-17.8 C) AMBIENT HEATERS -20ºF (-28.9 C) AMBIENT HEATERS MODEL NUMBERS No. of HEATERS kw per HEATER No. of HEATERS kw per HEATER CXV-64 thru CXV-3 thru CXV-160 thru CXV-196 thru CXV-3 thru CXV-N465 thru -N CXV-420 thru CXV-620 thru CXV-T645 thru -T CXV-T791 thru -T CXV-T1290 thru -T CXV-T1654 thru -T Electric Water Level Control Package The electric water level control replaces the standard mechanical makeup valve when a more precise water level control is required. This package consists of a conductance-actuated level control mounted in the basin and a solenoid activated valve in the make-up water line. The valve is slow closing to minimize water hammer. Electric Water Level Control Package Baltimore Aircoil Company

16 F49 Extended Lubrication Lines Extended lubrication lines are available for lubrication of the fan shaft bearings. Grease fittings are located inside the plenum area next to the access door. Grease fittings at the access door & bearings with the extended lubrication line option Air Inlet Screens Wire mesh screens can be factory-installed over the inlet louvers and the spray distribution system to prevent debris from entering the unit. Basin Sweeper Piping Basin sweeper piping provides an effective method of preventing debris from collecting in the cold water basin of the unit. A complete piping system, including nozzles, is provided in the cold water basin for connection to side stream filtration equipment (by others). Basin Sweeper Piping Evaporative Condensers Copper Sweat Fittings Optional copper sweat fittings are available to simplify field piping. Copper Sweat Fittings...because temperature matters

17 F50 Engineering Data Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. Up-to-date engineering data, free product selection software, and more can be found at CXV ACCESS DOOR BOTH ENDS 3" OVERFLOW REFRIG IN REFRIG OUT 6" 0-3/4" 13' 2-3/4" MODELS /2" MAKE UP MODELS /2" MAKE UP MODELS /2" MAKE UP 2" DRAIN 8' 5-1/4" 1' 3-3/4" 6' 1-1/4" 1' 4-1/4" 9' 1-1/4" 1' 8-1/4" 12' 1-1/4" END ELEVATION SIDE ELEVATION SIDE ELEVATION SIDE ELEVATION See page J16 for information on sizing a remote sump tank. R-717 INTERNAL MOTOR HP NOMINAL WEIGHTS (LBS) OPERATING COIL MODEL R-22 AIRFLOW HEAVIEST CHARGE 5 VOLUME NUMBER 1 TONS 2 FAN PUMP (CFM) OPERATING 3 SHIPPING SECTION (LBS) (FT 3 ) CXV ,950 7,4 5,020 2, CXV ,550 7,780 5,340 3, CXV ,850 8,170 5,680 3, CXV ,050 8,570 6,030 3, CXV ,650,800 7,160 4, CXV ,650 11,350 7,640 4, CXV ,000 11,360 7,650 4, CXV ,550 11,9 8,130 5, CXV ,650 12,480 8,630 5, CXV ,150 12,530 8,680 5, CXV ,750 14,330 9,360 5, CXV ,150 14,380 9,4 5, CXV ,250 15,060,0 6, CXV ,450 15,130,060 6, CXV ,850 15,830,670 7, CXV ,200 15,930,770 7, Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at a 96.3ºF condensing temperature, a 20ºF suction temperature, and a 78ºF wet-bulb temperature. 2. R-22 tons are at a 5ºF condensing temperature, a 40ºF suction temperature, and a 78ºF wet-bulb temperature. 3. Operating weight is for the unit with the water level in the cold water basin at the overflow. 4. For R-22 and R-134a, the coil connection quantity will double (except for the CXV-64 thru -153). 5. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 6. Inlet and outlet connections are beveled for welding. 7. Standard make-up, drain and overflow connections are MPT. Baltimore Aircoil Company

18 F51 See page F58 for Engineering Considerations. ACCESS DOOR BOTH ENDS Notes: REFRIG IN REFRIG OUT 3" OVERFLOW A H MODELS " MAKE UP MODELS " DRAIN 11' " 1' 8-1/4" 12' 1-1/4" 2' 0-3/8" 18' 1-1/4" END ELEVATION SIDE ELEVATION SIDE ELEVATION CXV ,900 17,530,790 6, '-8 3/4" 15'- 3/4" CXV ,650 17,580,840 6, '-8 3/4" 15'- 3/4" CXV ,200 18,670 11,780 7, '-8 3/4" 15'- 3/4" CXV ,800 18,720 11,830 7, '-8 3/4" 15'- 3/4" CXV ,930 19,870 12,830 8, '-8 3/4" 15'- 3/4" CXV ,200 19,920 12,880 8, '-8 3/4" 15'- 3/4" CXV ,700 21,1 13,920 9, '-8 3/4" 15'- 3/4" CXV ,950 21,160 13,970 9, '-8 3/4" 15'- 3/4" CXV / ,900 25,500 15,320 9, '-2 1/4" 16'-4 1/4" CXV / ,650 25,590 15,4 9, '-2 1/4" 16'-4 1/4" CXV / ,550 25,690 15,5 9, '-2 1/4" 16'-4 1/4" CXV / ,760 27,2 16,8, '-2 1/4" 16'-4 1/4" CXV / ,300 27,290 16,890 11, '-2 1/4" 16'-4 1/4" CXV / ,3 29,030 18,400 12, '-2 1/4" 16'-4 1/4" CXV / ,290 30,830 19,990 14, '-2 1/4" 16'-4 1/4" CXV / ,350 29,1 18,480 12, '-2 1/4" 16'-4 1/4" CXV / ,050 30,9 20,070 14, '-2 1/4" 16'-4 1/4" CXV / ,050 30,990 20,150 14, '-2 1/4" 16'-4 1/4" CXV / ,300 31,0 20,260 14, '-2 1/4" 16'-4 1/4" CXV / ,350 31,120 20,280 14, '-2 1/4" 16'-4 1/4" 1. Model number denotes nominal ammonia capacity in evaporator tons at a 96.3ºF condensing temperature, a 20ºF suction temperature, and a 78ºF wet-bulb temperature. 2. R-22 tons are at a 5ºF condensing temperature, a 40ºF suction temperature, and a 78ºF wet-bulb temperature. 3. Operating weight is for the unit with the water level in the cold water basin at the overflow. 1" MAKE UP MOTOR HP WEIGHTS (LBS) R-717 INTERNAL DIMENSIONS OPERATING COIL MODEL NOMINAL R- AIRFLOW HEAVIEST CHARGE 5 VOLUME NUMBER 1 22 TONS 2 FAN PUMP (CFM) OPERATING 3 SHIPPING SECTION (LBS) (FT 3 ) A H CXV ,160 17,480,740 6, '-8 3/4" 15'- 3/4" 4. For R-22 and R-134a, the coil connection quantity will double. 5. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 6. Inlet and outlet connections are beveled for welding. 7. Standard make-up, drain and overflow connections are MPT. Evaporative Condensers...because temperature matters

19 F52 Engineering Data Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. Up-to-date engineering data, free product selection software, and more can be found at CXV REFRIG IN MODELS MODELS REFRIG OUT ACCESS DOOR BOTH ENDS H 3" OVERFLOW A 1" MAKE UP 1" MAKE UP 1" MAKE UP 2" DRAIN 11' " 24-5" 2-1/2" 36' 5" 2-1/2" END ELEVATION 1' 8-1/4" SIDE ELEVATION 1' 8-1/4" 2' 0-3/8" SIDE ELEVATION 2' 0-3/8" R-717 INTERNAL MOTOR HP NOMINAL WEIGHTS (LBS) DIMENSIONS OPERATING COIL MODEL R-22 AIRFLOW HEAVIEST CHARGE 5 VOLUME NUMBER 1 TONS 2 FAN PUMP (CFM) OPERATING 3 SHIPPING SECTION (LBS) (FT 3 ) A H CXV (2) 15 (2) 5 155,800 35,060 21,580 6, '-8 3/4" 15'- 3/4" CXV (2) (2) 5 134,400 37,340 23,560 7, '-8 3/4" 15'- 3/4" CXV (2) 15 (2) 5 153,600 37,440 23,660 7, '-8 3/4" 15'- 3/4" CXV (2) (2) 5 129,860 39,740 25,660 8, '-8 3/4" 15'- 3/4" CXV (2) 15 (2) 5 148,400 39,840 25,760 8, '-8 3/4" 15'- 3/4" CXV (2) 15 (2) 5 145,400 42,220 27,840 9, '-8 3/4" 15'- 3/4" CXV (2) 20 (2) 5 159,900 42,320 27,940 9, '-8 3/4" 15'- 3/4" CXV (2)15/(2)7.5 (2) ,800 51,000 30,640 9, '-2 1/4" 16'-4 1/4" CXV (2)20/(2) (2) ,300 51,180 30,820 9, '-2 1/4" 16'-4 1/4" CXV (2)25/(2)15 (2) ,0 51,380 31,020 9, '-2 1/4" 16'-4 1/4" CXV (2)/(2)5 (2) ,520 54,400 33,600 11, '-2 1/4" 16'-4 1/4" CXV (2)15/(2)7.5 (2) ,600 54,580 33,780 11, '-2 1/4" 16'-4 1/4" CXV (2)/(2)5 (2) ,620 58,040 36,780 12, '-2 1/4" 16'-4 1/4" CXV-796 1,008 (2)/(2)5 (2) ,580 61,660 39,980 14, '-2 1/4" 16'-4 1/4" CXV-832 1,053 (2)15/(2)7.5 (2) ,700 58,220 36,960 12, '-2 1/4" 16'-4 1/4" CXV-854 1,081 (2)15/(2)7.5 (2) ,0 61,820 40,140 14, '-2 1/4" 16'-4 1/4" CXV-898 1,137 (2)20/(2) (2) ,0 61,980 40,300 14, '-2 1/4" 16'-4 1/4" CXV-932 1,180 (2)25/(2)15 (2) ,600 62,200 40,520 14, '-2 1/4" 16'-4 1/4" CXV-962 1,218 (2)30/(2)15 (2) ,700 62,240 40,560 14, '-2 1/4" 16'-4 1/4" Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at a 96.3ºF condensing temperature, a 20ºF suction temperature, and a 78ºF wet-bulb temperature. 2. R-22 tons are at a 5ºF condensing temperature, a 40ºF suction temperature, and a 78ºF wet-bulb temperature. 3. Operating weight is for the unit with the water level in the cold water basin at the overflow. 4. For R-22 and R-134a, the coil connection quantity will double. 5. The R-22 operating charge is 1.93 times the ammonia charge; R- 134a is 1.98 times. 6. Inlet and outlet connections are beveled for welding. 7. Standard make-up, drain and overflow connections are MPT. Baltimore Aircoil Company

20 F53 See page F58 for engineering considerations Designed to minimize refrigerant piping, these models have coil connections on just one end. ACCESS DOOR BOTH ENDS Notes: 3" OVERFLOW REFRIG IN REFRIG OUT 2" DRAIN 11' " END ELEVATION MOTOR HP 9' 2-1/4" 16' 4-1/4" 1' 8-1/4" 1. Model number denotes nominal ammonia capacity in evaporator tons at a 96.3ºF condensing temperature, a 20ºF suction temperature, and a 78ºF wet-bulb temperature. 2. R-22 tons are at a 5ºF condensing temperature, a 40ºF suction temperature, and a 78ºF wet-bulb temperature. 3. Operating weight is for the unit with the water level in the cold water basin at the overflow. 4. For R-22 and R-134a, the coil connection quantity will double. For ammonia applications above 676 tons, the coil connection quantity will double. 1" MAKE UP WEIGHTS (LBS) MODELS N465 N687 23' 6" SIDE ELEVATION R-717 OPERATING CHARGE 5 NOMINAL MODEL R-22 AIRFLOW HEAVIEST NUMBER 1 TONS 2 FAN PUMP (CFM) OPERATING 3 SHIPPING SECTION (LBS) (FT 3 ) CXV-N (2) 15 (2) 5 174,270 34,400 20,890 12, CXV-N (2) (2) 5 149,230 36,590 22,780 14, CXV-N (2) 15 (2) 5 170,8 36,730 22,920 14, CXV-N (2) 20 (2) 5 188,430 36,770 22,960 14, CXV-N (2) 15 (2) 5 169,2 39,1 25,000 16, CXV-N (2) 20 (2) 5 186,220 39,150 25,040 16, CXV-N (2) 20 (2) 5 183,020 41,5 27,120 18, CXV-N (2) 25 (2) 5 197,790 41,6 27,220 19, CXV-N (2) 30 (2) 5 2,170 41,890 27,500 19, ' 8-1/4" INTERNAL COIL VOLUME 5. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 6. Inlet and outlet connections are beveled for welding. 7. Standard make-up, drain and overflow connections are MPT. 8. The vertical liquid leg height for models CXV-N465 thru CXV-N687 should be at least 12 feet for multiple condenser installations on ammonia applications. Minimum liquid leg height is subject to overall system piping requirements. Evaporative Condensers...because temperature matters

21 F54 Engineering Data - CXV-T Models Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. Up-to-date engineering data, free product selection software, and more can be found at CXV REFRIG. IN REFRIG. OUT REFRIG. IN REFRIG. OUT CXV T645 to T944 CXV T1290 to T1888 H ACCESS DOORS BOTH ENDS '-4 3/4" SPRAY PUMPS 2-1/2" W L L END ELEVATION SIDE ELEVATION SIDE ELEVATION MOTOR HP WEIGHTS (LBS) R-717 INTERNAL DIMENSIONS NOMINAL OPERATING COIL MODEL R-22 AIRFLOW HEAVIEST CHARGE 4 VOLUME NUMBER 1 TONS 2 FAN PUMP (CFM) OPERATING 3 SHIPPING SECTION (LBS) (FT 3 ) W L H 8 CXV-T (2) ,0 42,640 27,7 8, '-1/2" 11'-11" 18'-7 7/8" CXV-T (2) ,420 42,780 27,850 8, '-1/2" 11'-11" 18'-7 7/8" CXV-T (2) 7.5 2,980 42,840 27,9 8, '-1/2" 11'-11" 18'-7 7/8" CXV-T (2) ,150 45,8 30,6 9, '-1/2" 11'-11" 18'-7 7/8" CXV-T (2) ,490 45,870 30,670 9, '-1/2" 11'-11" 18'-7 7/8" CXV-T792 1, (2) ,9 46,030 30,830 9, '-1/2" 11'-11" 18'-7 7/8" CXV-T791 1, (2) ,480 50,070 31,770 9, '-3 1/2" 13'-11 1/8" 18'-9 7/8" CXV-T827 1, (2) ,080 50,130 31,830 9, '-3 1/2" 13'-11 1/8" 18'-9 7/8" CXV-T857 1, (2) ,9 50,290 31,990 9, '-3 1/2" 13'-11 1/8" 19'-5 7/8" CXV-T876 1,9 50 (2) ,050 53,740 35,1 11, '-3 1/2" 13'-11 1/8" 18'-9 7/8" CXV-T906 1, (2) ,630 53,900 35,270 11, '-3 1/2" 13'-11 1/8" 19'-5 7/8" CXV-T944 1, (2) ,020 53,950 35,320 11, '-3 1/2" 13'-11 1/8" 19'-5 7/8" CXV-T1290 1,633 (2) 30 (4) ,200 85,280 55,420 8,050 1, '-1/2" 24'-1/2" 18'-7 7/8" CXV-T1372 1,737 (2) 40 (4) ,840 85,560 55,700 8,050 1, '-1/2" 24'-1/2" 18'-7 7/8" CXV-T1434 1,815 (2) 50 (4) ,960 85,680 55,820 8,050 1, '-1/2" 24'-1/2" 18'-7 7/8" CXV-T1458 1,846 (2) 40 (4) ,300 91,620 61,220 9,430 1, '-1/2" 24'-1/2" 18'-7 7/8" CXV-T1526 1,932 (2) 50 (4) ,980 91,740 61,340 9,430 1, '-1/2" 24'-1/2" 18'-7 7/8" CXV-T1584 2,005 (2) 60 (4) ,820 92,060 61,660 9,430 1, '-1/2" 24'-1/2" 18'-7 7/8" CXV-T1582 2,003 (2) 40 (4) ,960 0,140 63,540 9,390 1, '-3 1/2" 28'-3/4" 18'-9 7/8" CXV-T1654 2,094 (2) 50 (4) ,160 0,260 63,660 9,390 1, '-3 1/2" 28'-3/4" 18'-9 7/8" CXV-T1714 2,170 (2) 60 (4) ,820 0,580 63,980 9,390 1, '-3 1/2" 28'-3/4" 18'-9 7/8" CXV-T1752 2,218 (2) 50 (4) ,0 7,480 70,220 11,030 1, '-3 1/2" 28'-3/4" 18'-9 7/8" CXV-T1812 2,294 (2) 60 (4) ,260 7,800 70,540 11,030 1, '-3 1/2" 28'-3/4" 18'-9 7/8" CXV-T1888 2,390 (2) 75 (4) ,040 7,900 70,640 11,030 1, '-3 1/2" 28'-3/4" 18'-9 7/8" Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at a 96.3ºF condensing temperature, a 20ºF suction temperature, and a 78ºF wet-bulb temperature. 2. R-22 tons are at a 5ºF condensing temperature, a 40ºF suction temperature, and a 78ºF wet-bulb temperature. 3. Operating weight is for the unit with the water level in the cold water basin at the overflow. 4. Coil connections also available on the end. For other refrigerants, contact your local BAC Representative for the coil connection quantity. 5. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 6. Inlet and outlet connections are beveled for welding. 7. Standard make-up, drain and overflow connections are located on the bottom of the unit. Make-up connection is 1-1/2 MPT standpipe, drain is 2 FPT and overflow is 3 FPT. 8. Models shipped with an optional gear drive or low sound fan may have heights up to.5" greater than shown. Baltimore Aircoil Company

22 F55 Structural Support The recommended support arrangement for CXV Evaporative Condensers consists of parallel I-beams positioned as shown in the drawings. Besides providing adequate support, the steel also serves to raise the unit above any solid foundation to assure access to the bottom of the unit. Alternate steel support designs include a cantilevered plan as indicated by the optional minimum D dimension in the table below. When unit is supported with a cantilever plan, the side opposite the air inlet shall be cantilevered. To support a CXV on columns or in an alternate arrangement not shown here, consult your local BAC Representative. Notes: D 1 1/8" MODEL NUMBER D OPTIONAL MINIMUM D MAXIMUM DELFECTION CXV-64 to 95 8'-3" 6'-0" 3/16" CXV-3 to 153 8'-3" 6'-0" 5/16" CXV-160 to 206 8'-3" 6'-0" 3/8" CXV-196 to '-7 3/4" 9'-6" 3/8" CXV-3 to '-7 3/4" 9'-6" 1/2" CXV-N465 to N687 11'-7 3/4" 9'-6" 1/2" CXV-420 to 6 11'-7 3/4" 9'-6" 3/8" CXV-620 to '-7 3/4" 9'-6" 1/2" 1. Support steel and anchor bolts to be designed and furnished by others. 2. All support steel must be level at the top. 3. Beams must be selected in accordance with accepted structural practice. Maximum deflection of beam under unit to be 1/360 of span, not to exceed 1/2 inch. AIR IN AIR IN 1 7/16" A/2 A STEEL SUPPORT MODEL NUMBER A MAXIMUM DEFLECTION CXV-T645 to T792 23'-9 5/8" 1/2" CXV-T791 to T944 26'- 5/8" 1/2" CXV-T1290 to T '-9 5/8" 1/2" CXV-T1654 to T '- 5/8" 1/2" 4. If vibration isolation rails are to be used between unit and supporting steel, be certain to allow for the length of the vibration rails when determining the length of the supporting steel, as vibration rail length and mounting hole locations may differ from those of the unit. 5. If point vibration isolation is used with multi-cell units, the isolators must be located under the support steel, not between the support steel and the units. AIR IN Evaporative Condensers...because temperature matters

23 F56 CXV Engineering Specifications See our website at for an electronic copy of product engineering specifications. Part 1: General A. General: Furnish and install factory assembled evaporative condenser(s) of induced draft design with vertical discharge, conforming in all aspects to the specifications and schedules as shown on the plans. B. Capacity: The evaporative condenser(s) shall be warranted by the manufacturer to have condensing capacity of BTUH heat rejection, operating with refrigerant at F condensing temperature and F entering wet-bulb temperature. C. Warranty: The manufacturer shall provide a five-year mechanical drive warranty covering the fans, fan shafts, bearings, sheaves, supports, and fan motors. The manufacturer s standard equipment warranty for the balance of the components shall be for a period of one year from the date of startup or eighteen months from the date of shipment, whichever ends first. D. Factory Testing: The manufacturer shall be capable of testing the operation of the condenser in the manufacturer s own test facility. Test facilities shall be capable of simulating design conditions, including but not limited to design wet-bulb, airflow, refrigerant mass flow rate, refrigerant condensing temperature, and total heat rejection. E. Quality Assurance: The manufacturer shall have a Management System certified by an accredited registrar as complying with the requirements of ISO-9001:2000 to ensure consistent quality of products and services. Manufacturers that are not ISO-9001:2000 certified shall provide an additional one year warranty to the customer at no additional cost. Part 2: Products 2.01 Evaporative Condenser Materials and Components A. General: A. General: All steel panels and structural elements shall be constructed from heavy-gauge, G-235 (Z700 metric) hot-dip galvanized steel, with cut edges given a protective coating of zinc-rich compound. Or, for CXV-T Models A. General: All steel panels and structural elements shall be constructed from heavy-gauge, G-235 (Z700 metric), hot-dip galvanized steel, with cut edges given a protective coating of zinc-rich compound. Casing panels shall be constructed of corrosion resistant, fiberglass, reinforced polyester (FRP) Coil Casing Assembly A. The evaporative condenser shall include a coil casing section consisting of refrigerant condensing coil, spray water distribution system, drift eliminators, and air plenum with fan assemblies as indicated by the manufacturer. 1.The refrigerant condensing coil shall be fabricated of continuous lengths of all prime surface steel at the manufacturer s own facility, and hot-dip galvanized after fabrication. a. The refrigerant condensing coil shall be pneumatically tested at 375 psig (2687 kpa). b. The refrigerant condensing coil shall be designed for low pressure drop with sloping tubes for free drainage of liquid refrigerant. c. The refrigerant condensing coil shall be ASME B31.5 compliant and coils shipping into Canada shall be supplied with a CRN. 2. Water shall be distributed evenly over the coil at a minimum flow rate of gpm/ft 2 (6.8 lps/m 2 ) to ensure complete wetting of the coil at all times. Large-diameter, non-clog, 360 plastic distribution nozzles shall be spaced across the coil face area in Schedule 40 PVC spray branches. Nozzles shall utilize a two-stage diffusion pattern to provide overlapping, umbrella spray patterns that create multiple intersection points with adjacent nozzles. a. Nozzles and spray branches shall be observable and accessible for cleaning from the outside of the evaporative condenser during condenser operation without the removal of other components. b. Spray branches and nozzles shall be held in place by snap-in rubber grommets, allowing quick removal of individual nozzles or complete branches for cleaning or flushing. 3. Removable PVC drift eliminators shall be positioned to prevent moisture from entering the air plenum and incorporate a minimum of three (3) changes in air direction. 4. Fan(s) shall be heavy-duty, axial type with aluminum alloy blades driven by a one-piece, multi-groove neoprene/polyester belt designed for a minimum of 150% of the motor nameplate horsepower. a. Fan(s) and shafts shall be supported by heavy-duty, self aligning, grease-packed ball bearings with moisture-proof seals and integral sealer rings, designed for a minimum L life of 40,000 hours (280,000 hours average life). b. Fan and motor sheaves shall be fabricated from corrosion resistant materials. c. Fan motor(s) shall be totally enclosed air over (TEAO) type with a 1.15 service factor, suitable for volt, phase, Hz electrical service and shall be mounted on an easily adjusted, heavy-duty motor base. d. The motor shall be furnished with double-sealed, permanently lubricated bearings and special moisture protection on windings, shafts and bearings. e. Air plenum shall provide a minimum of 48 (1220 mm) clearance under the motor base to provide comfortable working space for service personnel. Baltimore Aircoil Company

24 F Pan Assembly A. The evaporative condenser shall include a pan assembly consisting of cold water basin with pump assembly, heat transfer section for spray water cooling with integral drift eliminators, and wide spaced air inlet louvers. 1. The cold water basin shall be constructed of heavy-gauge steel panels and structural members. Basin shall include a depressed section with drain/cleanout connection. The basin area under the wet deck surface shall be sloped toward the depressed section to facilitate cleaning. - OR - 1. The cold water basin shall be constructed of heavy-gauge Type 304 stainless steel panels and structural members, with all welded seams. The welded stainless steel basin shall be leak tested at the factory. Basin shall include a depressed section with drain/cleanout connection. The basin area under the wet deck surface shall be sloped toward the depressed section to facilitate cleaning. 2. The cold water basin shall include: a drain/clean-out connection; a steel strainer; a brass make-up valve; over flow connection; and a water recirculation pump assembly. a. Cold water basin shall be designed so that the strainer, makeup valve and float, and pump assembly are easily accessible without removing any of the unit panels or other components. b.lift-out steel strainer shall be supplied with perforated openings sized smaller than the water distribution nozzle orifices and an integral anti-vortexing hood to prevent air entrainment. c. Water recirculation pump shall be a close-coupled, bronze-fitted centrifugal pump equipped with a mechanical seal, mounted on the basin and piped from the suction strainer to the water distribution system. i. The pump shall be installed with adequate drains so that it may drain freely when the basin is drained. ii. The pump assembly shall include an integral metering valve and bleed line to control the bleed rate from the pump discharge to the overflow connection. iii.the pump motor shall be totally enclosed fan cooled (TEFC) type suitable for volt, phase, Hz electrical service. d.on installations requiring a remote sump, the evaporative condenser shall be modified to accommodate the use of an independent sump and pump for recirculating water (by others). i. The recirculating water pump, steel strainer, make-up valve, and integral bleed line assemblies shall be omitted from the evaporative condenser scope of supply. ii. The evaporative condenser shall be supplied with a cold water basin outlet sized and located as indicated on the drawings for gravity drain to the remote sump. iii.the water distribution system shall have a design operating pressure of 1 psig (8.25 kpa) at the evaporative condenser spray water inlet connection. 3. The heat transfer section shall consist of wet deck surface with integral drift eliminators for cooling the spray water leaving the coil to optimize the thermal performance of the evaporative condenser. a. The wet deck surface and integral drift eliminators shall be formed from polyvinyl chloride (PVC). b.the wet deck surface and integral drift eliminators shall be impervious to rot, decay, fungus, and biological attack. 4. The air inlet louvers shall be manufactured of wave-formed, fiberglass-reinforced polyester (FRP) widely spaced to minimize air resistance and prevent water splash-out Optional Equipment Specifications A. Evaporative condenser shall be provided with basin heaters to prevent freezing of the recirculating water when the evaporative condenser is idle. 1. The basin heaters shall be selected to maintain +40 F (4.4 C) basin water temperature at a 0 F (-17.8 C) ambient temperature and mph (16.1 km/hr) wind speed. 2. Basin heaters shall be electric immersion type controlled by a remote thermostat with the sensing bulb located in the basin water. 3. Basin heaters shall be provided with a low water level cutout switch to prevent heater operation unless the heater elements are adequately submerged. B. Evaporative condenser shall be provided with extended lubrication lines with standard grease fittings for lubricating the fan shaft bearings from the outside base of the condenser. C. Evaporative condenser shall be supplied with dedicated motors and drives so that each fan can be cycled independently. D. Evaporative condenser shall be provided with a factory assembled, field-installed external platform with an access ladder and handrails complying with OSHA standards and regulations to provide access to the top of the evaporative condenser. 1. External platform shall have a 24 (6 mm) wide non-skid walking surface and 42 (1220 mm) high safety railings. 2. Optional ladder safety cage shall be available to meet OSHA requirements as necessary. Or, for CXV-T Models D. Evaporative condenser shall be provided with factory assembled, field installed perimeter safety railings and walking surface above coil air intake to provide access to the top of the evaporative condenser. E. Evaporative condenser shall be provided with a moveable ladder with fixed ladder supports to provide access to the fan drive system and coil assembly. F. Evaporative condenser shall be provided with an internal walkway at the access door to facilitate servicing the unit. G. Evaporative condenser shall be provided with a factory assembled internal working platform with ladder to provide a permanent working surface for maintenance personnel (CXV-193 and larger only). H. Evaporative condenser shall be provided with the ENERGY- MISER Fan System, which provides two-single speed fan motors, one sized for full horsepower and load, the other sized for 1/3 the full horsepower and approximately 70% full load for capacity control and stand-by protection from drive or motor failure. I. Evaporative condenser shall be supplied with a right angle gear drive designed specifically for evaporative condenser service. All gears shall have a minimum service factor of 2.0 based on design fan horsepower. An oil level fill port and sight glass shall be located on the gear drive to facilitate routine inspection and maintenance. Evaporative Condensers...because temperature matters

25 F58 Engineering Considerations - Evaporative Condensers Location Engineering Considerations Units must have an adequate supply of fresh air to the air inlet(s). When units are located adjacent to building walls or in enclosures, care must be taken to ensure that the warm, saturated discharge air is not deflected off of surrounding walls or enclosures and drawn back to the air inlet(s). CAUTION: Each unit should be located and positioned to prevent the introduction of the warm discharge air and the associated drift, which may contain chemical or biological contaminants including Legionella, into the ventilation systems of the building on which the unit is located or those of adjacent buildings. For detailed recommendations on layout, refer to our web site, or consult your local BAC Representative. For Series V products, bottom screens or solid bottom panels may be desirable or necessary for safety, depending on the location and conditions at the installation site. Piping and Valves Piping should be adequately sized according to standard refrigeration practice and arranged to allow flexibility for expansion and contraction between component parts of the system. Suitably sized equalizing lines must be installed between the condenser and high pressure receiver to prevent gas binding and refrigerant backup in the condenser. Service valves should be installed so that the component parts may be easily serviced. On multiple evaporative condenser installations, evaporative condensers in parallel with shell-and-tube condensers, or single condensers with multiple coils, refrigerant outlet connections must be trapped into the main liquid refrigerant header. The height of the trapped liquid legs must be sufficient to balance the effect of the unequal coil pressures without backing up liquid refrigerant into the condensing coil. This type of liquid line piping permits independent operation of any one of the parallel circuits without manually closing inlet and outlet valves. Although equalizing lines can be used to balance water levels between multi-cell evaporative condensers, the spray water for each cell must be treated separately, and a separate make-up must be provided for each cell. Note that a common remote sump for multi-cell installations can simplify make-up and water treatment see page J16 for details. See page F60 or the appropriate Operating and Maintenance Instruction Manual for more information on water treatment Baltimore Aircoil Company

26 F59 Capacity Control Variable Frequency Drives (VFD) Installations which are to be controlled by Variable Frequency Drives (VFD) require the use of an inverter duty motor as designed per NEMA Standard MG.1, Section IV, Part 31, which recognizes the increased stresses placed on motors by these drive systems. Inverter duty motors must be furnished on VFD applications in order to maintain the motor warranty. WARNING: When the fan speed is to be changed from the factory-set speed, including through the use of a variable speed control device, steps must be taken to avoid operating at or near fan speeds that cause a resonance with the unit or its supporting structure. At start-up, the variable frequency drive should be cycled slowly between zero and full speed and any speeds that cause a noticeable resonance in the unit should be locked out by the variable speed drive. Fan Cycling Fan cycling is the simplest method of capacity control. The number of steps of capacity control can be increased using the ENERGY-MISER Fan System, the independent fan motor option, or two-speed fan motors in conjunction with fan cycling (see the Custom Features & Options section of the appropriate product line to determine whether the ENERGY-MISER Fan System or the independent fan motor option are available; two-speed motors are available for all products). These options provide substantial energy savings when compared to simple fan cycling. WARNING: Rapid on-off cycling can cause the fan motor to overheat. It is recommended that controls be set to allow a maximum of 6 on-off cycles per hour. Note: Spray water pump cycling should not be used for capacity control. This method of control often results in short cycling of the pump motor as capacity changes substantially with pump cycling. In addition, alternate wetting and drying of the coil promotes scaling of the heat exchanger coil surface. Capacity Control Dampers (Centrifugal Fans Models Only) On centrifugal fan models, modulating capacity control dampers are available to provide close control of head pressure. See page F19 or contact your local BAC Representative for more details. Evaporative Condensers Vibration Cutout Switches Vibration cutout switches are recommended on all installations. Vibration cutout switches are designed to interrupt power to the fan motor and/or provide an alarm to the operator in the event of excessive vibration. BAC offers both electronic and mechanical vibration cutout switches on all evaporative condenser models....because temperature matters

27 F60 Water Treatment Engineering Considerations As water evaporates in an evaporative cooling unit, the dissolved solids originally present in the water remain in the system. The concentration of these dissolved solids increases rapidly and can cause scale and corrosion. In addition, airborne impurities and biological contaminants, including Legionella, may be introduced into the circulating water. To control all potential contaminants, a water treatment program must be employed. In many cases, a simple bleed-off may be adequate for control of scale and corrosion. Note: Bleed lines are to be provided and installed by others. However, biological contamination, including Legionella, can be controlled only through the use of biocides. Such treatment should be initiated at system startup, after periods of equipment shutdown, and continued regularly thereafter. Accordingly, it is strongly recommended a biocide treatment be initiated when the unit is first filled with water and continued regularly thereafter. For more information, consult the appropriate Operating and Maintenance Manual. When a water treatment program is employed, it must be compatible with construction materials. The ph of the circulating water must be maintained between 6.5 and 9.0. Units having galvanized steel construction and a circulating water ph of 8.3 or higher will require periodic passivation of the galvanized steel to prevent the accumulation of white, waxy, nonprotective zinc corrosion called white rust. Batch feeding of chemicals into the unit is not recommended. If units are constructed with optional corrosion resistant materials, acid treatment may be considered; however, the water quality must be maintained within the guidelines set forth in the Operating and Maintenance Instructions. Note: Unless a common remote sump is utilized, each cell of a multi-cell installation must be treated as a separate entity, even if the cold water basins are flumed together or equalized. For complete Water Quality Guidelines, see the appropriate Operating and Maintenance Instruction Manual, available at For specific recommendations on water treatment, contact a competent water treatment supplier. Sound Levels Sound rating data is available for all BAC Evaporative Condensers. When calculating the sound levels generated by a unit, the designer must take into account the effects of the geometry of the tower as well as the distance and direction from the unit to noise-sensitive areas. Low-sound fans and intake and discharge sound attenuation can be supplied on certain models to provide reduced sound characteristics (see the Custom Features and Options section of the appropriate product line for details). The ENERGY-MISER Fan System, two-speed motors, or variable frequency drives can also be used to reduce sound during periods of non-peak thermal loads. For more information on sound and how it relates to evaporative cooling equipment, see page J20. For detailed low sound selections, please consult your local BAC Representative. Baltimore Aircoil Company

28 F61 Protection Against Basin Water Freezing When a unit is shut down in freezing weather, the basin water must be protected by draining to an indoor auxiliary remote sump tank (see page H5 for remote sump engineering data; page J16 for sizing guidelines) or by providing supplementary heat to the cold water basin. Supplementary heat can be provided by electric immersion heaters or in some cases, hot water or steam coils, or steam injectors. All exposed water piping, make-up lines, and spray pumps (if applicable) that do not drain at shutdown should be traced with electric heater tape and insulated. When dry operation is planned for low ambient conditions, centrifugal fan units should be supplied with oversized fan motors to prevent motor overload when the spray water is not operating. Dry operation with standard fan motors is acceptable for axial fan units. For remote sump applications, the spray water pump must be selected for the required flow at a total head which includes the vertical lift, pipe friction (in supply and suction lines) plus the required pressure at the inlet header of the water distribution system (2.0 psi for CXV models; 1.0 psi for Series V models). A valve should always be installed in the discharge line from the pump to permit adjusting flow to the unit requirement. Inlet water pressure should be measured by a pressure gauge installed in the water supply riser at the spray water inlet, and adjusted to the specified inlet pressure. See page J17 for more information. Indoor Installations (Applicable to Series V Models Only) Many indoor installations require the use of inlet and/or discharge ductwork. Units installed with inlet ductwork must be ordered with solid-bottom panels. Generally, intake ducts are used only on smaller units while the equipment room is used as a plenum for larger units. Discharge ductwork will normally be required to carry the saturated discharge air from the building. Both intake and discharge ductwork must have access doors to allow servicing of the fan assembly, drift eliminators, and water distribution system. All ductwork should be symmetrical and designed to provide even air distribution across the face of air intakes and discharge openings. WARNING: The discharge opening must be positioned to prevent the introduction of discharge air into the fresh air intakes serving the unit or the ventilation systems of adjacent buildings. Note: Axial fan units are not suitable for indoor installations. Safety Adequate precautions, appropriate for the installation and location of these products, should be taken to safeguard the public from possible injury and the equipment and the premises from damage. Operation, maintenance and repair of this equipment should be undertaken only by personnel qualified to do so. Proper care, procedures and tools must be used in handling, lifting, installing, operating, maintaining, and repairing this equipment to prevent personal injury and/or property damage. Evaporative Condensers...because temperature matters

29 F62 Code Requirement Standard coils are ASME B31.5 compliant and are provided with a Canadian Registration Number (CRN) when required. State or local codes, or certain applications may require the use of pressure vessels designed, fabricated, tested and U stamped in accordance with the ASME Boiler and Pressure Vessel Code, Section VIII, Division I. In such cases, the optional ASME U Stamp coil must be provided. Engineering Considerations Purging Air and other non-condensable gases collect in refrigeration systems from several sources: poor evacuation prior to charging or after repairs; a leak into the system if pressures are below atmospheric; and chemical breakdown of oil and/or refrigerant. If permitted to accumulate, non-condensables in the system cause high condensing pressures and, therefore, increased power input to the compressors. Purging can be accomplished during shut down, from the high point of the system, or during operation, from the top of the condensing coil outlet and high pressure receiver. Refer to the BAC Evaporative Condenser Engineering Manual for more detailed recommendations on piping and purging. Refrigerant Liquid Subcooling The pressure at the expansion device feeding the evaporator(s) can be substantially lower than the receiver pressure due to liquid line pressure losses. If the liquid line is long or the evaporator is above the receiver, which further reduces the pressure at the expansion device, significant flashing can occur in the liquid line. To avoid liquid line flashing where the above conditions exist, it is necessary to subcool the liquid refrigerant after it leaves the receiver. The minimum amount of subcooling required is the temperature difference between the condensing temperature and the saturation temperature corresponding to the pressure at the expansion device. To determine the degree of subcooling required, it is necessary to calculate the liquid line pressure drop including valves, ells, tees, strainers, etc., and add to it the pressure drop equivalent to the static head loss between the receiver and the expansion device at the evaporator, if the evaporator is located above the receiver. Some compressor manufacturers publish their compressor ratings based on a fixed amount of subcooling at the expansion device. Subcooled liquid at the expansion device of the evaporator does increase system capacity since it increases the refrigeration effect per pound of refrigerant circulated. But the increase is relatively small and seldom justifies the cost of the subcooling device and piping for this reason alone. However, where compressor ratings based on subcooled liquid are used, the specified amount of subcooling must be added to that required for liquid line pressure drop and static head loss. Baltimore Aircoil Company

30 F63 One method commonly used for supplying subcooled liquid for halocarbon systems is to provide a subcooling coil section in the evaporative condenser, located below the condensing coil (see Figure 1). Note: This option is available on Series V Evaporative Condensers Only. Depending upon the design wet-bulb temperature, condensing temperature, and subcooling coil surface, these sections will normally furnish F to 15 F (5.6 C to 8.3 C) of liquid cooling. However, to be effective, the subcooling coil must be piped between the receiver and evaporator as Figure 1 shown in Figure 1. Note: Increasing the evaporative condenser size over the capacity required for the system will not produce liquid subcooling. The increased condenser capacity will result only in lower operating condensing temperatures. The same result will occur if the condensing coil is piped directly to the subcooling coil. Low temperature, multistage ammonia (R-717) refrigeration systems often use liquid subcooling between stages for more economical operation. However, subcooling coils in an evaporative condenser are seldom, if ever, used with an ammonia refrigeration system for several reasons: 1. Design condensing temperatures are generally lower with ammonia, thus limiting the amount of subcooling that can be obtained. 2. The density of ammonia liquid is approximately 37 pounds per cubic foot, less than half that of the normally used halocarbons, and static head losses are proportionately less. 3. The expansion devices and system designs normally used for ammonia systems are less sensitive to small amounts of flash gas. 4. The high latent heat of ammonia (approximately 480 Btu/lb versus 70 Btu/lb for R-22) results in comparatively small amounts of flash gas with a liquid line properly sized for low pressure drop. Warranties Please refer to the Limitation of Warranties applicable to and in effect at the time of the sale/purchase of these products. Evaporative Condensers...because temperature matters

31 Tons Tons Ammonia Ammonia Nominal Nominal to Up Tons) Tons) R-22 R-22 Nominal (2205 (2340 EVAPORATIVE CONDENSERS COOLING TOWERS CXV EVAPORATIVE CONDENSERS Baltimore Aircoil CLOSED CIRCUIT COOLING Bulletin S126/1-OE THERMAL STORAGE

32 CXV Evaporative Condensers The CXV Series is an extensive line of energy-efficient, induced draft, evaporative condensers incorporating many innovative features, including BAC's patented Advanced Coil Technology, that deliver superior thermal and mechanical performance. The result provides highly reliable performance with reduced maintenance, installation and operating costs for owners and operators of refrigeration systems. Superior maintenance and accessibility features ensure performance efficiency and protect your investment Advanced Coil Technology reduces the tendency for scale buildup Proven design results in reliable, cost effective operation year-round Installation advantages reduce costs and offer location and engineering flexibility 2

33 Reliable Performance, Dependable Operation Performance tested and rated by BAC, a leading industry proponent for the development of programs for independent certification of thermal performance. Time-tested components ensure dependable service. Thousands of owners currently benefit from BAC's patented Advanced Coil Technology. Unparalleled Application Flexibility Extensive product line ranges from 64 to 1888 nominal ammonia tons in a single unit: Largest single cell unit in the industry. Single and multi-fan offer units flexibility for a broad range of redundancy and capacity control options. Induced-draft configuration reduces sound levels at grade by directing mechanical noise skyward. Superior Maintenance and Accessibility Features Advanced Coil Technology reduces scaling potential. Wide-spaced, non-clog air inlet louvers. Corrosion resistant FRP casing on CXV-T Models. Water distribution system accessible from unit exterior, while unit s operating. Easy access to service points reduces maintenance costs and helps extend equipment life. Reduced Cost of Installation and Operation Fewer coil connections reduce costs of pipe, valves, purgers, and labor. Reduced refrigerant charge lowers installation costs and may help satisfy refrigerant charge thresholds. Lighter operating weight reduces support requirements. Ideal replacement unit - direct replacement for many older configurations. Top-mounted, induced-draft axial fans and rugged construction permit wet operation year-round to maximize energy savings. Operating Charge Copyright, Baltimore Aircoil Company, 2003 Printed in USA BALTIBOND, ENERGY-MISER, and BALTIDRIVE are registered trademarks of Baltimore Aircoil Company CXV Others Others 3

34 BAC s Patented Advanced Superior Thermal and Mechanical Performance Reliable performance delivered through the innovative combination of two proven heat transfer designs. Efficient year-round evaporative condensing with induced-draft fans in the warm airstream, above the wet areas. Low scaling tendency reduces maintenance requirements and sustains peak performance between service intervals. Extended service intervals due to low scaling tendency, non-clog, wide-spaced air inlet louvers and accessible large-orifice water distribution system. Spacious plenum provides easy maintenance of fan drive system, heat transfer coil and cold water basin. Fewer coil connections, reduced refrigerant charge, and low unit weights minimize installation costs. CXV Series Principle of Operation Water is sprayed in parallel with the fresh ambient air flowing over the outside of the condensing coil. Parallel air and water paths minimize scale-producing dry spots that may be found on the bottom of the tubes in other conventional condensers. WATER DISTRIBUTION SYSTEM VAPOR IN COIL LIQUID OUT AIR IN WATER WARM AIR OUT WARM AIR The cooled water increases the temperature differential between the water and the warm refrigerant, which permits the CXV to employ a reduced coil size, fewer coil connections, a lower refrigerant charge, and reduced unit weights. This facet further reduces the tendency to form scale on the coil since cooler water offers higher solubility for scale producing compounds. 4 The condensing coil rejects heat through both evaporative cooling using the fresh air stream and, more significantly, through sensible cooling using the pre-cooled recirculating spray water. Reducing this evaporative cooling component from the coil section helps to minimize the propensity to form scale on the relatively hot coil surface. AIR IN AIR INLET LOUVERS SPRAY PUMP WATER Water is pumped over the condensing coil at a rate of GPM/ft 2 of coil face area to ensure continuous flooding of the primary heat transfer surface which enhances heat transfer efficiency and minimizes scale formation. WARM AIR SUMP WATER WET DECK SURFACE The recirculating spray water falls from the coil to a wet deck surface section where it is cooled by a second fresh air stream using both evaporative and sensible heat transfer processes.

35 Coil Technology Delivers... Coil Technology Delivers... Superior Maintenance Features Superior The CXV Series delivers Maintenance unique and valuable Features features using proven components. The many The maintenance CXV delivers and accessibility unique and valuable features of features the using CXV proven eliminate components. cramped spaces The many and limited maintenance accessibility accessibility to service features points associated of the CXV with eliminate conven- and cramped tional evaporative spaces and condensers. limited accessibility The CXV to design service builds upon points countless associated decades with conventional of operating evaporative experience, condensers. incorporating The components CXV design that builds are upon proven decades to be durable of operating and simple experience, to maintain. incorporating components that are proven to be durable and simple to maintain. Direct Access to Direct Water Access Spray System to Water Spray System Hinged Access Doors for Easy Entry Hinged Access Doors for Easy Entry Oversized access doors in end wall provides easy access to the unit interior. Oversized access doors in both end walls provide easy access to the unit interior to adjust the makeup float valve and clean the strainer and basin. Easy Access to Fan Drive System Easy and Condensing Access to Fan Coil Drive System and Condensing Coil The parallel air and water flows of the CXV allow The the parallel spray area air to and be water uncovered flows (drift of the eliminators CXV allow the are spray inside), area permitting to be uncovered quick and (drift easy eliminators inspectionare inside), of the sprays permitting and coils quick from and outside easy inspection the unit while of the sprays the CXV and is coils in full from operation. outside the unit while the CXV is in full operation. Wide-Spaced, Non-Clog Air Wide-Spaced, Inlet Louvers Non-Clog Air Inlet Louvers A spacious plenum provides easy access to the fan drive system and the condensing coil through easily A spacious removable plenum PVC provides eliminators. easy access to the fan drive system and the condensing coil through easily removable PVC eliminators. Sloped Basin Floor Floor Facilitates Cleaning Durable, wide-spaced air inlet louvers reduce the potential for performance-robbing scale build-up and Durable, damaging wide-spaced ice formations air inlet at louvers the air/water reduce the interface. potential for performance-robbing scale build-up and damaging ice formations at the air/water interface. The floor of the water basin is sloped toward the depressed The floor section of the water and the basin wet is deck sloped is elevated toward the to facilitate depressed flushing section dirt and and the wet debris deck from is elevated this to critical facilitate area. the flushing of dirt and debris from this critical area. 5

36 Standard Features Corrosion-Resistant Construction CXV Evaporative Condensers are constructed from heavy gauge G-235 (Z700 metric) hot-dipped galvanized steel as standard. For CXV-T models casing panels and air inlet louvers, which are critical components for extended unit life, are constructed of non-metallic, corrosion resistant fiberglass reinforced polyester (FRP) which has been proven by decades of successful performance on large industrial equipment. This standard construction will provide reliable corrosion protection and long unit life with minimum maintenance requirements for most installations. Durable, Wide-Spaced Air Inlet Louvers The air inlet louvers on the CXV Evaporative Condenser are constructed of low maintenance, corrosion resistant FRP. They are widely spaced to reduce the potential for performance-robbing scale or ice build-up. The durable heavy-gauge, wave-formed FRP can easily withstand the rigors of cleaning and year-round operation. Serpentine Condensing Coil The serpentine condensing coil is constructed of continuous lengths of all prime surface steel and hot-dip galvanized after fabrication (HDGAF). Continuous circuits eliminate potential problems associated with intermediate butt welds. Each coil is pressure tested to 375 psig (2687 kpa). Many Fan Configuration Choices The CXV product line offers models with up to six fans per unit. Single-fan models are available in both the smallest tonnage ranges and in models that deliver more than 940 nominal ammonia tons per fan. On installations with multiple condensers, fewer fans may be desired to minimize the number of moving parts. For moderately sized projects or those where redundancy and fan cycling for capacity control are more pressing issues, the CXV has standard models with up to six fans and four fan motors (plus an option to go to six motors) per unit. 6

37 Optional Features BALTIBOND Corrosion Protection System on Galvanized Steel The BALTIBOND Corrosion Protection System is a hybrid polymer coating which is applied on top of galvanized steel in a rigorously controlled process at BAC s factories. This proprietary coating technology was developed by BAC to increase protection for galvanized steel from abnormally corrosive environments or upsets in water quality. Welded Stainless Steel Basin A welded, Type 304 stainless steel basin is available to increase leak protection and corrosion protection of this critical component. All seams between panels inside the cold water basin are welded. The basin is leak tested at the factory and comes with a five-year leak-proof guarantee. Type 304 stainless steel provides an additional measure of corrosion protection should this component be exposed to abnormally corrosive conditions such as upsets in water quality. Independent Fan System The independent fan system provides dedicated motors and drives for multiple-fan models so that each fan can be cycled independently, providing additional capacity control flexibility. ENERGY-MISER Fan System The ENERGY-MISER Fan System features a second fan motor which is sized to deliver approximately 75% of full-speed capacity while consuming approximately 33% of the full-speed fan horsepower. This configuration provides energysaving capacity control and the reserve capacity of a standby motor in the event of a failure. ASME U -Stamped Coil Construction This coil construction is available to provide an added measure of security or where codes or system designs require an ASME coil. The ASME coil is designed, manufactured, and tested per the stringent requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, and bears the ASME U Symbol. Low Sound Fans & Sound Attenuation The induced-draft CXV fans are located on top to direct sound skyward and are carefully selected to produce optimal thermal performance with minimal sound levels. For projects requiring lower sound levels, low sound fans and/or sound attenuation baffles are available. External Access Provisions An optional external service platform with aluminum ladder mounted on the louver face of the unit or perimeter handrails and ladders for CXV-T models provide easy access to the water distribution system. Internal Access Provisions Internal ladder, walkway or platform provides easier access to the fan drive system and coil. Other options: Multiple-Circuit or Split-Circuit Coils Copper Sweat Fittings Heavy-Wall Coils Stainless Steel or Copper Coils Basin Heaters and Heater Control Packages Electric Water Level Control Packages Redundant Pump Systems Two-Speed and Variable-Speed Motors Miscellaneous Special Motors Gear-Driven Fan System (CXV-T Models) Extended Lubrication Lines Vibration Cut-Out Switches Debris Screens 7

38 Construction Details Induced Draft Minimizes possible water leaks Diminishes potential for fan freeze-ups Reduces recirculation risk Directs sound skyward Corrosion-Resistant Construction Heavy gauge G-235 (Z700 metric) galvanized steel Corrosion resistant FRP casing on CXV-T models. Drift Eliminators Efficiently remove entrained moisture from leaving air stream Non-corroding polyvinyl chloride (PVC) Removable sections permit quick access to the coil section Water Distribution System Visible and accessible without disassembly or having to enter cramped spaces Overlapping spray patterns ensure proper water coverage Large-diameter, 360 spray nozzles minimize clogging Low-HP Axial Fans Efficient axial fan design Corrosion resistant aluminum construction Lower-sound fans available BALTIDRIVE Power Train Five-year motor and drive warranty Totally enclosed air-over (TEAO) motor Heavy duty bearings (280,000 hour average life) Cast aluminum sheaves Hinged Access Doors Easy-latch, inward swinging doors Located on both endwalls Integral Pump Close-coupled, bronze fitted centrifugal pump with mechanical seal and TEFC motor Bleed line and metering valve discharge to overflow connection Basin Sloped basin below elevated wet deck facilitates cleaning Corrosion resistant G-235 galvanized steel construction Welded, Type 304 stainless steel basin available 8

39 FRP Louvers Durable, corrosion resistant FRP Widely spaced to eliminate louver plugging and facilitate cleaning Removable for unhampered access Reduced Scale Tendency Four facets of the CXV Evaporative Condenser work together to reduce the propensity for scale build-up when compared with conventional condensers: 1. Air and Water Flow in Parallel Path. Better water coverage around the tubes is due to air and spray water flowing in a smooth, parallel, downward path over the condensing coil, maintaining full tube coverage. This parallel flow eliminates scale-promoting dry spots since the water is not stripped from the underside of the tubes by the airflow. CXV Casing Panels Durable, corrosion resistant fiberglass reinforced polyester (FRP) on CXV-T models Corrosion resistant G-235 galvanized steel on all other models. HDGAF Condensing Coil Pneumatically tested at 375 psig 0.06" nominal tube wall thickness Connection quantity is typically 1/2 that of other similar size units CRN for projects in Canada BACross Wet Deck Surface with Integral Drift Eliminators Polyvinyl chloride (PVC) Impervious to rot, decay, or biological attack Elevated above basin floor to facilitate cleaning Conventional 2. Increased Water Flow over Coil. The spray water flow rate over the coil is more than twice that of most conventional evaporative condensers. This provides continuous flooding of the primary heat transfer surface for decreased scaling potential. No increase in pump horsepower is required with this higher flow due to the CXV s unique heat transfer system. 3. Evaporation Occurs Primarily in Wet Deck. The CXV incorporates combined-flow technology using both primary and secondary heat transfer surfaces. The primary heat transfer surface, the serpentine condensing coil, is the most important as well as the most expensive component in the evaporative condenser. The coil of the CXV is protected from detrimental scale since the CXV coil relies primarily on sensible heat transfer and therefore is less susceptible to scale formation than are other designs that rely primarily on latent (evaporative) heat transfer from the coil surface. 4. Colder Spray Water. Spray water at colder temperatures has a lower propensity to form scale because scaling compounds remain in solution rather than depositing as solids on the coil. In the CXV, the spray water over the coil is commonly 6 F to 8 F colder than other condenser designs due to the addition of the secondary heat transfer surface. The colder spray water alone typically reduces the scaling potential* of the CXV by 25% compared to other designs. This is above and beyond the reduction achieved due to the first three facets discussed above. *Using Langelier Index 9

40 drawings, & software, Engineering at at available available are are information information additional Selection Heat Rejection Method In a mechanical refrigeration system, the function of an evaporative condenser is to reject heat to the environment. The heat to be rejected is the sum of the heat input at the evaporator and the energy input at the compressor. For a given set of operating conditions, the energy input through the compression process can vary. Therefore, to accurately determine the proper evaporative condenser required, it is necessary to establish the compressor energy input as well as the heat absorbed in the evaporator. Selection Procedure The Base Heat Rejection of each evaporative condenser is shown in Table 1. Tables 2 and 3 present correction factors to be applied to the system heat rejection for various condensing temperatures, wet bulbs, and refrigerants. 1. Establish total heat rejection required in thousands of Btu per hour (MBH): Total heat rejection = compressor evaporator capacity (MBH) + compressor Bhp x Determine the refrigerant and design conditions for condensing temperature and wet bulb temperature. 3. Using the appropriate table for the system refrigerant (Table 2 or 3), determine the correction factor for the design condensing temperature and wet bulb temperature. 4. Multiply the total heat rejection found in Step 1 by the correction factor determined in Step From Table 1, select the evaporative condenser whose Base Heat Rejection equals or exceeds the corrected heat rejection calculated in Step 4. Table 1. Base Heat Rejection Model Number CXV-64 CXV-77 CXV-86 CXV-95 CXV-3 CXV-119 CXV-125 CXV-134 CXV-143 CXV-153 CXV-160 CXV-171 CXV-179 CXV-192 CXV-184 CXV-206 CXV-196 CXV-2 CXV-220 CXV-235 CXV-253 CXV-264 CXV-283 CXV-290 CXV-305 CXV-3 CXV-324 CXV-337 CXV-349 CXV-373 CXV-388 CXV-398 CXV-416 CXV-427 CXV-449 CXV-466 CXV-481 CXV-420 CXV-470 CXV-506 CXV-528 CXV-566 CXV-580 CXV-6 Base Heat Rejection (MBH) 1,327 1,596 1,783 1,969 2,135 2,467 2,591 2,777 2,964 3,171 3,316 3,544 3,7 3,980 3,814 4,270 4,062 4,353 4,560 4,871 5,244 5,472 5,866 6,011 6,322 6,425 6,716 6,985 7,234 7,731 8,042 8,249 8,622 8,850 9,306 9,659 9,970 8,705 9,742,488,944 11,731 12,022 12,643 Model Number CXV-620 CXV-648 CXV-674 CXV-698 CXV-746 CXV-776 CXV-796 CXV-832 CXV-854 CXV-898 CXV-932 CXV-962 CXV-N465 CXV-N491 CXV-N530 CXV-N559 CXV-N574 CXV-N605 CXV-N636 CXV-N664 CXV-N687 CXV-T645 CXV-T686 CXV-T717 CXV-T729 CXV-T763 CXV-T792 CXV-T791 CXV-T827 CXV-T857 CXV-T876 CXV-T906 CXV-T944 CXV-T1290 CXV-T1372 CXV-T1434 CXV-T1458 CXV-T1526 CXV-T1584 CXV-T1582 CXV-T1654 CXV-T1714 CXV-T1752 CXV-T1812 CXV-T1888 Base Heat Rejection (MBH) 12,851 13,431 13,970 14,467 15,462 16,084 16,499 17,245 17,701 18,613 19,318 19,939 9,638,177,985 11,586 11,897 12,540 13,182 13,763 14,239 13,369 14,219 14,861 15,1 15,815 16,416 16,395 17,141 17,763 18,157 18,779 19,566 26,738 28,437 29,723 30,220 31,629 32,832 32,790 34,282 35,526 36,314 37,557 39,133 Notes: Consult your BAC Representative for evaporative condenser selections for systems utilizing refrigerants other than R-717, R-22, or R-134a and systems requiring special considerations, such as screw compressors with water cooled oil coolers, evaporative condensers with ammonia desuperheaters or halocarbon subcooling.

41 Table 2. Heat Rejection Capacity Factors R-717 (Ammonia) Condensing Pressure (psig) Cond. Temp. Entering Wet Bulb Temperature ( F) ( F) R R Table 3. Heat Rejection Capacity Factors R-22, R-134a Condensing Cond. Entering Wet Bulb Temperature ( F) Pressure (psig) Temp. ( F) R-22 R-134a R-22 R-134a Selection Example Given: R-717 refrigerant Compressor evaporator capacity = 550 tons Compressor Bhp = 600 Condensing temperature = 95 F Wet bulb temperature = 76 F Solution: Determine the total heat rejection: Compressor evaporator capacity = 550 TR x 12,000 Btu/hr/TR = 6,600,000 Btu/hr Compressor Bhp input = 600 Bhp x 2,545 Btu/hr/Bhp = 1,527,000 Btu/hr Total heat rejection = 8,127,000 Btu/hr = 8,127 MBH From Table 2, the heat rejection capacity factor for R-717 at 95 F condensing temperature and 76 F wet bulb temperature is Multiply: 8,127 MBH x 1.34 =,890 MBH From Table 1, select a unit with a Base Heat Rejection equal to or greater than,890 MBH: Model CXV-N

42 drawings, & software, Engineering at at available available are are information information additional Selection 12 Evaporator Ton Method This selection method is based on estimated horsepower requirements for open reciprocating compressors only, and cannot be considered to be precise. Critical selections of this type should be checked by the heat rejection method shown on pages and 11. Selection Procedure 1. Determine the evaporator capacity in Refrigeration Tons (one Refrigeration Ton = 12,000 Btu/hr). 2. Determine refrigerant and design conditions of condensing temperature, suction temperature, and wet bulb temperature. 3. Using tables appropriate for the system refrigerant, determine two correction factors: the Evaporator Capacity Factor (Table 5 and 7) and the Suction Temperature Factor (Tables 6 and 8). 4. Multiply the evaporator capacity in tons by the two correction factors determined in Step From Table 4, select an evaporative condenser whose model number equals or exceeds the product (factors x tons) calculated in Step 4. Notes: Consult your BAC Representative for evaporative condenser selections for systems utilizing refrigerants other than R-717, R-22, or R-134a and systems requiring special considerations, such as screw compressors with water cooled oil coolers, evaporative condensers with ammonia desuperheaters or halocarbon subcooling. Selection Example: Open Recip. Compressor Given: R-134a refrigerant Evaporator capacity = 145 tons Condensing temperature = 5 F Suction temperature = 30 F Wet bulb temperature = 80 F Solution: From Table 7, the capacity factor for R-134a at 5 F condensing temperature and 80 F wet bulb is From Table 8, the capacity factor for R-134a at 30 F suction temperature is Multiply: 145 x 0.84 x 1.03 = corrected tons. From Table 4, select a unit with Corrected Evaporator Tons equal or greater to 125.5: Model CXV-134. Table 4. Base Corrected Evaporator Tons Model Number CXV-64 CXV-77 CXV-86 CXV-95 CXV-3 CXV-119 CXV-125 CXV-134 CXV-143 CXV-153 CXV-160 CXV-171 CXV-179 CXV-192 CXV-184 CXV-206 CXV-196 CXV-2 CXV-220 CXV-235 CXV-253 CXV-264 CXV-283 CXV-290 CXV-305 CXV-3 CXV-324 CXV-337 CXV-349 CXV-373 CXV-388 CXV-398 CXV-416 CXV-427 CXV-449 CXV-466 CXV-481 CXV-420 CXV-470 CXV-506 CXV-528 CXV-566 CXV-580 CXV-6 Corrected Evaporator Tons Model Number CXV-620 CXV-648 CXV-674 CXV-698 CXV-746 CXV-776 CXV-796 CXV-832 CXV-854 CXV-898 CXV-932 CXV-962 CXV-N465 CXV-N491 CXV-N530 CXV-N559 CXV-N574 CXV-N605 CXV-N636 CXV-N664 CXV-N687 CXV-T645 CXV-T686 CXV-T717 CXV-T729 CXV-T763 CXV-T792 CXV-T791 CXV-T827 CXV-T857 CXV-T876 CXV-T906 CXV-T944 CXV-T1290 CXV-T1372 CXV-T1434 CXV-T1458 CXV-T1526 CXV-T1584 CXV-T1582 CXV-T1654 CXV-T1714 CXV-T1752 CXV-T1812 CXV-T1888 Corrected Evaporator Tons ,290 1,372 1,434 1,458 1,526 1,584 1,582 1,654 1,714 1,752 1,812 1,888

43 Table 5. Evaporator Capacity Factors R-717 (Ammonia) Condensing Pressure (psig) Cond. Temp. Entering Wet Bulb Temperature ( F) ( F) R R Table 6. Suction Temperature Factors R-717 (Ammonia) Suction Temperature ( F) Capacity Factor Table 7. Evaporator Capacity Factors R-22, R-134a Condensing Pressure Cond. Entering Wet Bulb Temperature ( F) (psig) Temp. ( F) R-22 R-134a R-22 R-134a Table 8. Suction Temperature Factors R-22, R-134a Suction Temperature ( F) Capacity Factor

44 Engineering Data Models CXV-64 to 206 Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. REFRIG IN REFRIG OUT MODELS ACCESS DOOR THIS END ONLY 3" OVERFLOW 6" 0-3/4" 13' 2-3/4" /2" MAKE UP 2" DRAIN 8' 5-1/4" 1' 3-3/4" 6' 1-1/4" 1' 4-1/4" END ELEVATION SIDE ELEVATION MODELS MODELS MAKE UP 1/2" MAKE UP 1/2" MAKE UP 1' 4-1/4" 9' 1-1/4" 1' 8-1/4" 12' 1-1/4" SIDE ELEVATION SIDE ELEVATION Nom. Box Size 8.5' x 6' 8.5' x 9' 8.5' x 12' Model Number CXV-64 CXV-77 CXV-86 CXV-95 CXV-3 CXV-119 CXV-125 CXV-134 CXV-143 CXV-153 CXV-160 CXV-171 CXV-179 CXV-192 CXV-184 CXV-206 Base Heat Rejection( MBH) 1,327 1,596 1,783 1,969 2,135 2,467 2,591 2,777 2,964 3,171 3,316 3,544 3,7 3,980 3,814 4,270 Fan Motor (HP) Airflow Rate (CFM) 28,950 28,550 27,850 31,050 48,650 43,650 48,000 42,550 45,650 52,150 58,750 67,150 57,250 65,450 55,850 70,200 Pump Motor (HP) Shipping 5,020 5,340 5,680 6,030 7,160 7,640 7,650 8,130 8,630 8,680 9,360 9,4,0,060,670,770 Approx. Weight (lbs.) Heaviest Section 2,870 3,190 3,530 3,880 4,240 4,720 4,730 5,2 5,7 5,760 5,720 5,770 6,370 6,420 7,030 7,130 Operating 7,4 7,780 8,170 8,570,800 11,350 11,360 11,9 12,480 12,530 14,330 14,380 15,060 15,130 15,830 15,930 Ammonia Operating Charge (lbs) Internal Coil Volume (ft 3 ) Spray Flowrate (GPM) Drain Size Remote Sump Volume Required (gal) Approx. Oper. Wt. (lbs) 7,120 7,490 7,880 8,280,470 11,020 11,030 11,580 12,150 12,200 13,770 13,820 14,520 14,570 15,270 15, Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at +20 F SST, 96.3 F CT, and 78 F WBT. 2. For R-22 and R-134a, the coil connection quantity will double (except for the CXV-64 to 153). 3. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 4. Remote sump gallons required does not include water in interconnecting piping or water required to cover pump suction. 5. Detailed drawings are available at our website, or through your BAC Representative.

45 Models CXV-196 to 481 Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. REFRIG IN REFRIG OUT MODELS MODELS ACCESS DOOR THIS END ONLY H 3" OVERFLOW A 1" MAKE UP 1" MAKE UP 2" DRAIN 11' " 1' 8-1/4" 12' 1-1/4" 2' 0-3/8" 18' 1-1/4" END ELEVATION SIDE ELEVATION SIDE ELEVATION Nom. Box Size 12' x 12' 12' x 18' Model Number CXV-196 CXV-2 CXV-220 CXV-235 CXV-253 CXV-264 CXV-283 CXV-290 CXV-305 CXV-3 CXV-324 CXV-337 CXV-349 CXV-373 CXV-388 CXV-398 CXV-416 CXV-427 CXV-449 CXV-466 CXV-481 Base Heat Rejection (MBH) 4,062 4,353 4,560 4,871 5,244 5,472 5,866 6,011 6,322 6,425 6,716 6,985 7,234 7,731 8,042 8,249 8,622 8,850 9,306 9,659 9,970 Fan Motor (HP) /7.5 /5 25/15 /5 15/7.5 /5 /5 15/7.5 15/7.5 20/ 25/15 30/15 Airflow Rate (CFM) 68,160 77,900 85,650 67,200 76,800 64,930 74,200 72,700 79, , , ,550 1, ,300 98,3 96, ,350 1, , , ,350 Pump Motor (HP) Shipping,740,790,840 11,780 11,830 12,830 12,880 13,920 13,970 15,320 15,4 15,5 16,8 16,890 18,400 19,990 18,480 20,070 20,150 20,260 20,280 Approx. Weight (lbs.) Heaviest Section 6,580 6,630 6,680 7,620 7,670 8,670 8,720 9,760 9,8 9,500 9,590 9,690,990 11,070 12,580 14,170 12,660 14,250 14,330 14,440 14,460 Operating 17,480 17,530 17,580 18,670 18,720 19,870 19,920 21,1 21,160 25,500 25,590 25,690 27,2 27,290 29,030 30,830 29,1 30,9 30,990 31,0 31,120 Ammonia Operating Charge (lbs) Internal Coil Volume (ft 2 ) Spray Flowrate (GPM) Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at +20 F SST, 96.3 F CT, and 78 F WBT. 2. For R-22 and R-134a, the coil connection quantity will double. 3. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 4. Remote sump gallons required does not include water in interconnecting piping or water required to cover pump suction. 5. Detailed drawings are available at our website, or through your BAC Representative Drain Size Remote Sump Volume Required (gal) Approx. Oper. Wt. (lbs) A H 16,920 16,970 17,020 18,1 18,160 19,3 19,360 20,550 20,600 24,940 25,030 25,130 26,650 26,730 28,470 30,270 28,550 30,350 30,430 30,540 30,560 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 8'-8 3/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 9'-2 1/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 15

46 Engineering Data Models CXV-420 to 962* Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. REFRIG IN MODELS REFRIG OUT * ACCESS DOOR THIS END ONLY H 3" OVERFLOW A 1" MAKE UP 2" DRAIN 11' " 1' 8-1/4" 24' 5" 2-1/2" 1' 8-1/4" * Models CXV-420 to CXV-6 are four fan units. Models CXV-620 to CXV-962 are six fan units. Nom. Box Size 12' x 24' 12' x 36 Model Number CXV-420 CXV-470 CXV-506 CXV-528 CXV-566 CXV-580 CXV-6 CXV-620 CXV-648 CXV-674 CXV-698 CXV-746 CXV-776 CXV-796 CXV-832 CXV-854 CXV-898 CXV-932 CXV-962 Base Heat Rejection (MBH) 8,705 9,742,488,944 11,731 12,022 12,643 12,851 13,431 13,970 14,467 15,462 16,084 16,499 17,245 17,701 18,613 19,318 19,939 Fan Motor (HP) (2) 15 (2) (2) 15 (2) (2) 15 (2) 15 (2) 20 (2)15/(2)7.5 (2)20/(2) (2)25/(2)15 (2)/(2)5 (2)15/(2)7.5 (2)/(2)5 (2)/(2)5 (2)15/(2)7.5 (2)15/(2)7.5 (2)20/(2) (2)25/(2)15 (2)30/(2)15 Airflow Rate (CFM) 155, , , , , , , , , ,0 203, , , , , ,0 242,0 260, ,700 Pump Motor (HP) (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 Shipping 21,580 23,560 23,660 25,660 25,760 27,840 27,940 30,640 30,820 31,020 33,600 33,780 36,780 39,980 36,960 40,140 40,300 40,520 40,560 Approx. Weight (lbs.) Heaviest Section 6,630 7,620 7,670 8,670 8,720 9,760 9,8 9,500 9,590 9,690 11,000 11,070 12,590 14,180 12,660 14,250 14,330 14,440 14,460 Operating 35,060 37,340 37,440 39,740 39,840 42,220 42,320 51,000 51,180 51,380 54,400 54,580 58,040 61,660 58,220 61,820 61,980 62,200 62,240 Ammonia Operating Charge (lbs.) Internal Coil Volume (ft 2 ) Spray Flowrate (GPM) 1,430 1,430 1,430 1,430 1,430 1,430 1,430 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 Drain Size (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " (2) " Remote Sump Volume Required (gal) 1,200 1,200 1,200 1,200 1,200 1,200 1,200 1,500 1,500 1,500 1,500 1,500 1,500 1,500 1,500 1,500 1,500 1,500 1,500 Approx. Oper. Wt. (lbs.) L H P 33,940 36,220 36,320 38,620 38,720 41,0 41,200 49,880 50,060 50,260 53,280 53,460 56,920 60,540 57,0 60,700 60,860 61,080 61,120 24'-5" 24'-5" 24'-5" 24'-5" 24'-5" 24'-5" 24'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 36'-5" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 15'- 3/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 16'-4 1/4" 1'-8 1/4" 1'-8 1/4" 1'-8 1/4" 1'-8 1/4" 1'-8 1/4" 1'-8 1/4" 1'-8 1/4" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 2'-0 3/8" 16 Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at +20 F SST, 96.3 F CT, and 78 F WBT. 2. For R-22 and R-134a, the coil connection quantity will double. 3. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 4. Remote sump gallons required does not include water in interconnecting piping or water required to cover pump suction. 5. Detailed drawings are available at our website, or through your BAC Representative.

47 Models CXV-N450 ton664 Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. REFRIG IN MODELS REFRIG OUT N465 N687 ACCESS DOOR THIS END ONLY 16' 4-1/4" 3" OVERFLOW 9' 2-1/4" 1" MAKE UP 2" DRAIN 11' " 1' 8-1/4" 23' 6" 1' 8-1/4" END ELEVATION SIDE ELEVATION Nom. Box Size Model Number Base Heat Rejection (MBH) Fan Motor (HP) Airflow Rate (CFM) Pump Motor (HP) Shipping Approx. Weight (lbs.) Heaviest Section Operating Ammonia Operating Charge (lbs.) Internal Coil Volume (ft 2 ) Spray Flowrate (GPM) Drain Size Remote Sump Volume Required( gal) Approx. Oper. Wt. (lbs.) 12' x 24' CXV-N465 CXV-N491 CXV-N530 CXV-N559 CXV-N574 CXV-N605 CXV-N636 CXV-N664 CXV-N687 9,638,177,985 11,586 11,897 12,540 13,182 13,763 14,239 (2) 15 (2) (2) 15 (2) 20 (2) 15 (2) 20 (2) 20 (2) 25 (2) , , ,8 188, ,2 186, , ,790 2,170 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 (2) 5 20,890 22,780 22,920 22,960 25,000 25,040 27,120 27,220 27,500 12,750 14,640 14,780 14,820 16,860 16,900 18,980 19,080 19,360 34,400 36,590 36,730 36,770 39,1 39,150 41,5 41,6 41, ,430 1,430 1,430 1,430 1,430 1,430 1,430 1,430 1,430 12" 12" 12" 12" 12" 12" 12" 12" 12" 1,140 1,140 1,140 1,140 1,140 1,140 1,140 1,140 1,140 33,280 35,470 35,6 35,650 37,990 38,030 40,390 40,490 40,770 Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at +20 F SST, 96.3 F CT, and 78 F WBT. 2. For R-22 and R-134a, the coil connection quantity will double. For R-717 applications above 676ton, the coil connection quantity will double. 3. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 4. Remote sump gallons required does not include water in interconnecting piping or water required to cover pump suction. 5. The vertical liquid leg height for models CXV-N465 to CXV-N687 should be at least 12 feet for multiple condenser installations. Minimum liquid leg height is subject to overall system piping requirements. 6. Detailed drawings are available at our website, or through your BAC Representative. 17

48 Engineering Data Models CXV-T645 to T1888 Do not use for construction. Refer to factory certified dimensions. This brochure includes data current at time of publication, which should be reconfirmed at the time of purchase. REFRIG. IN REFRIG. IN CXV T645 to T944 CXV T1290 to T1888 REFRIG. OUT REFRIG. OUT H ACCESS DOORS BOTH ENDS '-4 3/4" SPRAY PUMPS W END ELEVATION L SIDE ELEVATION 2-1/2" L SIDE ELEVATION Nom. Box Size Model Number Base Heat Rejection (MBH) Fan Motor (HP) Airflow Rate (CFM) Pump Motor (HP) Shipping Approx. Weight (lbs.) Heaviest Section Operating Ammonia Operating Charge (lbs) Internal Coil Volume (ft 2 ) Spray Flowrate (GPM) Drain Size Remote Sump Volume Required (gal) Approx. Oper. Wt. (lbs.) W L H 12' x 24' 14' x 26' 24' x 24' 28' x 26' 18 CXV-T645 CXV-T686 CXV-T717 CXV-T729 CXV-T763 CXV-T792 CXV-T791 CXV-T827 CXV-T857 CXV-T876 CXV-T906 CXV-T944 CXV-T1290 CXV-T1372 CXV-T1434 CXV-T1458 CXV-T1526 CXV-T1584 CXV-T1582 CXV-T1654 CXV-T1714 CXV-T1752 CXV-T1812 CXV-T ,369 14,219 14,861 15,1 15,815 16,416 16,395 17,141 17,763 18,157 18,779 19,566 26,738 28,437 29,723 30,220 31,629 32,832 32,790 34,282 35,526 36,314 37,557 39, (2) 30 (2) 40 (2) 50 (2) 40 (2) 50 (2) 60 (2) 40 (2) 50 (2) 60 (2) 50 (2) 60 (2) ,0 195,420 2, , , ,9 225, , ,9 240, , , , , , , , , , , , ,0 511, ,040 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (2) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) 7.5 (4) ,7 27,850 27,9 30,6 30,670 30,830 31,770 31,830 31,990 35,1 35,270 35,320 55,420 55,700 55,820 61,220 61,340 61,660 63,540 63,660 63,980 70,220 70,540 70,640 8,050 8,050 8,050 9,430 9,430 9,430 9,390 9,390 9,390 11,030 11,030 11,030 8,050 8,050 8,050 9,430 9,430 9,430 9,390 9,390 9,390 11,030 11,030 11,030 42,640 42,780 42,840 45,8 45,870 46,030 50,070 50,130 50,290 53,740 53,900 53,950 85,280 85,560 85,680 91,620 91,740 92,060 0,140 0,260 0,580 7,480 7,800 7, ,312 1,312 1,312 1,560 1,560 1,560 1,506 1,506 1,506 1,806 1,806 1,806 Notes: 1. Model number denotes nominal ammonia capacity in evaporator tons at +20 F SST, 96.3 F CT, and 78 F WBT. 2. Coil connections also available on the end. 3. For R-22 and R-134a, the coil connection quantity will double. 4. The R-22 operating charge is 1.93 times the ammonia charge; R-134a is 1.98 times. 5. Remote sump gallons required does not include water in interconnecting piping or water required to cover pump suction. 6. Detailed drawings are available at our website, or through your BAC Representative ,720 1,720 1,720 1,720 1,720 1,720 1,720 1,720 1,720 1,720 1,720 1,720 3,440 3,440 3,440 3,440 3,440 3,440 3,440 3,440 3,440 3,440 3,440 3,440 12" 12" 12" 12" 12" 12" 12" 12" 12" 12" 12" 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" (2) 12" 1,625 1,625 1,625 1,625 1,625 1,625 2,000 2,000 2,000 2,000 2,000 2,000 3,250 3,250 3,250 3,250 3,250 3,250 4,000 4,000 4,000 4,000 4,000 4,000 41,240 41,380 41,440 44,4 44,470 44,630 48,670 48,730 48,890 52,340 52,500 52,550 82,480 82,760 82,880 88,820 88,940 89,260 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 26'-3 1/2" 26'-3 1/2" 26'-3 1/2" 26'-3 1/2" 26'-3 1/2" 26'-3 1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 97,340 26'-3 1/2" 97,460 26'-3 1/2" 97,780 26'-3 1/2" 4,680 26'-3 1/2" 5,000 26'-3 1/2" 5,0 26'-3 1/2" 11'-11" 11'-11" 11'-11" 11'-11" 11'-11" 11'-11" 13'-11 1/8" 13'-11 1/8" 13'-11 1/8" 13'-11 1/8" 13'-11 1/8" 13'-11 1/8" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 24'-1/2" 28'-3/4" 28'-3/4" 28'-3/4" 28'-3/4" 28'-3/4" 28'-3/4" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-7 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8" 18'-9 7/8"

49 CXV-T Models Ideal for Large Projects The CXV-T Evaporative Condenser delivers the industry s greatest capacity in a single module. This is just one reason why these models are ideal for large industrial projects. The CXV-T model features include: Corrosion resistant fiberglass reinforced polyester (FRP) casing panels and louvers Enhanced layout flexibility with coil connections on air intake sides Reduced shipping and operating weights Up to 50% refrigerant charge reduction compared to conventional condensers. AIR IN WARM AIR OUT AIR IN WATER DISTRIBUTION SYSTEM VAPOR IN WATER WARM AIR WARM AIR WATER COIL LIQUID OUT AIR IN WATER WARM AIR AIR WARM WATER AIR IN SUMP WATER SUMP WATER AIR INLET LOUVERS SPRAY PUMPS WET DECK SURFACE CXV-T Principle of Operation As an extension of the patented and acclaimed CXV Evaporative Condenser, these models are induced-draft, axial fan evaporative condensers that utilizes a secondary heat transfer surface to cool the circulating water before the cooled water is recirculated over the condensing coils. The CXV-T models build on the CXV design capacity by doubling the heat transfer sections on a single, common fan system. The result is a leap in the maximum capacity per unit using components that have been proven through countless hours of use in BAC s broad range of product lines. Cell 1 Cell 2 Cell 3 Cell 4 Plan View Typical Multi-Cell Layout Layout flexibility allows the largest capacity in the smallest area compared to other conventional type condensers. The dual air inlet style and coil connections on the air inlet sides allow for greater flexibility on larger projects with limited space. 19

50 Engineering Application 20 Satisfactory evaporative condenser performance is dependent on correct selection and proper attention to overall system design. Some of the major planning considerations are highlighted below, and attention is called to published BAC bulletins and manuals that provide a more detailed treatment of evaporative condenser application, operation, and maintenance. Refer to the BAC Evaporative Condenser Engineering Manual and the BAC Operating and Maintenance Instructions for more details. Piping Proper piping is important to the successful and economical evaporative condenser operation. Piping should be adequately sized according to standard refrigeration practice and arranged to allow flexibility for expansion and contraction between component parts of the system. Suitably sized equalizing lines must be installed between the condenser and high pressure receiver to prevent gas binding and refrigeration backup in the condenser. Service valves should be installed so that the component parts may be easily serviced. On multiple evaporative condenser installations, evaporative condensers in parallel with shell-andtube condensers, or single condensers with multiple coils, refrigerant outlet connections must be trapped into the main liquid refrigerant header. The height of the trapped liquid legs must be sufficient to balance the effect of the unequal coil pressures without backing up liquid refrigerant into the condensing coil. This type of liquid line piping permits independent operation of any one of the parallel circuits without manually closing inlet and outlet valves. Purging Air and other non-condensable gases collect in refrigeration systems from several sources: poor evacuation prior to charging or after repairs; a leak into the system if pressures are below atmospheric; and chemical breakdown of oil and/or refrigerant. If permitted to accumulate, non-condensables in the system cause high condensing pressures and, therefore, increased power input to the compressors. Purging can be accomplished during shut down, from the high point of the system, or during operation, from the top of the condensing coil outlet and high pressure receiver. Refer to the BAC Evaporative Condenser Engineering Manual for more detailed recommendations on piping and purging. Cold Weather Operation The CXV Evaporative Condenser is well suited for cold weather applications when used with proper capacity control and freeze protection. When the CXV is operating under load with a minimum condensing temperature of 50 F, the recirculating water will not freeze. Under freezing conditions with the fans and the spray pump off, the basin water must be protected from freezing. Electric heaters can be installed in the condenser basin. Optional heaters are available for 0 F and -20 F ambient temperatures based on a mph wind. In addition, the pump suction line, pump, pump discharge line (up to the overflow), and the water make-up line should be wrapped with a heat-tracing element and insulated. Model Number An alternative method of freeze protection involves the use of an auxiliary sump tank and spray water recirculating pump, located in a heated indoor space. Water drains from the condenser basin to the remote sump, and when the pump is shut off, the water remains in the indoor remote sump. The tank (supplied by others) must be sized to accommodate water in suspension in the condenser(s) plus the water in supply and return piping. Remote pumps (supplied by others) must be selected for the required flow at a total head which includes the vertical lift, pipe friction, plus 1.0 psig at the CXV water inlet. A valve should be installed in the condenser water supply line to permit adjustment and maintain pressure below psig at the CXV water inlet. Capacity Control Standard 0 o F (Kw) Low Temp. -20 o F (Kw) CXV-64 to CXV-3 to CXV-160 to 192, CXV-196 to CXV-3 to CXV-N465 to N687 (2) (2) 15 CXV-420 to 6 (2) 12 (2) 16 CXV-620 to 962 (2) 16 (2) 21 CXV-T645 to T792 (2) 12 (2) 15 CXV-T791 to T944 (2) 14 (2) 20 CXV-T1290 to T1584 (4) 12 (4) 15 CXV-T1654 to T1888 (4) 14 (4) 20 Many systems are subject to wide load variations and substantial changes in ambient temperature conditions. Where refrigeration systems require a relatively constant condensing pressure, some form of capacity control is required. Fan cycling is the simplest and most convenient method of capacity control. The Independent Fan System,

51 with one motor per fan, and the ENERGY-MISER Fan System provide additional steps of control and a measure of redundancy. Two-speed fan motors offer similar capacity control. More precise control may be achieved with a variable speed control device. CAUTION: Rapid on-off cycling can cause the fan motor to overheat. It is recommended that controls be set to allow a maximum of six on-off cycles per hour. WARNING: When the fan speed is to be changed from the factory-set speed, including the use of a variable speed control device, steps must be taken to avoid creating the hazard of personal injury or property damage associated with operating at or near the fan s critical speed. Installations which are to be controlled by Variable Frequency Drives (VFDs) require the use of an inverter duty motor designed per NEMA Standard MG.1, Section IV, Part 31, which recognizes the increased stresses placed on motors by these drive systems. VFD applications require inverter duty motors to maintain the motor warranty. Water pump cycling should not be used for capacity control. Capacity changes so greatly with and without spray water that this method of control often results in short cycling of the pump. In addition, alternate wetting and drying of the coil promotes scaling of the condensing coil surface. Water Treatment As water evaporates in an evaporative condenser, the dissolved solids originally present in the water remain in the system. The concentration of dissolved solids increases rapidly and can cause scale and corrosion. In addition, airborne impurities and biological contaminant's, including Legionella, may be introduced into the recirculating water. To control all potential contaminant's, a water treatment program must be employed. Although general recommendations regarding the quality of water circulated through BAC evaporative condensers are made below, it is always the responsibility of the end-user to contact a competent water treatment specialist to design an applicationspecific treatment program for a given system. This program should consider (as a minimum) monitoring water quality, adjusting of bleed rate, passavating galvanized steel surfaces, and chemically treating, and biological control. For optimal heat transfer efficiency and maximum equipment life, the cycles of concentration should be controlled such that the recirculating water is maintained within the guidelines listed in the table below. Criteria Galvanized Steel Construction ph 7.0 to Hardness as CaCO3 30 to 500 ppm max. Alkalinity as CaCO3 500 ppm max. Total Dissolved Solids 1,000 ppm max. Chlorides 125 ppm max. Sulfates 125 ppm max. 1 Units having galvanized steel construction and a circulating water ph of 8.3 or higher will require periodic passivation of the galvanized steel to prevent white rust, the accumulation of white, waxy, non-protective zinc corrosion products on galvanized steel surfaces. The variables in water chemistry are often complex and applications-specific. Even if each of the above requirements is met, it is still possible for the overall water quality to be unacceptable. Likewise, acceptable water quality is achievable with certain criteria outside the recommended guidelines. The end user should implement an application specific treatment program developed and administrated by a water treatment specialist based on the available water supply. The bleed rate and water quality should be periodically checked to ensure that adequate control of the water quality is being maintained. The required continuous bleed rate may be calculated by the formula: The evaporation rate can be determined by one of the following: (1) approximately 2 USGPM per one million Btu/hr of heat rejection, or (2) approximately 3 USGPM per 0 tons of refrigeration. Cycles of concentration equal the number of times impurities in the recirculating water have been increased through evaporation. Refer to the BAC Operating and Maintenance Instructions for more detailed recommendations. For specific recommendations on water treatment for scale, corrosion or biological control, consult a qualified water treatment consultant. Safety Bleed Rate = Evaporation Rate (Cycles of Concentration-1) Adequate precautions, appropriate for the installation and location of these products, should be taken to safeguard the public from possible injury and the equipment and the premises from damage. Operation, maintenance and repair of this equipment should be undertaken only by personnel qualified to do so. Proper care, procedures and tools must be used in handling, lifting, installing, operating, maintaining, and repairing this equipment to prevent personal injury and/or property damage. 21

52 22 Engineering Specifications Part 1: General A. General: Furnish and install, factory assembled evaporative condenser(s) of induced draft design with vertical discharge, conforming in all aspects to the specifications and schedules as shown on the plans. B. Capacity: The evaporative condenser(s) shall be guaranteed by the manufacturer to have condensing capacity of BTUH heat rejection, operating with refrigerant at F condensing temperature and F entering wet bulb temperature. C. Warranty: The manufacturer shall provide a five-year mechanical drive warranty covering the fans, fan shafts, bearings, sheaves, supports, and fan motors. The manufacturer s standard equipment warranty for the balance of the components shall be for a period of one year from the date of startup or eighteen months from the date of shipment, whichever ends first. D. Factory Testing: The manufacturer shall be capable of testing the operation of the condenser in the manufacturer s own test facility. Test facilities shall be capable of simulating design conditions, including but not limited to design wet bulb, air flow, refrigerant mass flow rate, refrigerant condensing temperature, and total heat rejection. E. Quality Assurance: The manufacture shall have a Management System certified by an accredited registrar as complying with the requirements of ISO-9001 to ensure consistent quality of products and services. Manufacturers that are not ISO-9001 certified shall provide an additional one year warranty to the customer at no additional cost. Part 2: Products 2.01 Evaporative Condenser Materials and Components A. General: All steel panels and structural elements shall be constructed from heavy gauge, G-235 (Z700 metric) hot-dip galvanized steel, with cut edges given a protective coating of zincrich compound. CXV-T Models A. General: All steel panels and structural elements shall be constructed from heavy gauge, G-235 (Z700 metric), hot-dip galvanized steel, with cut edges given a protective coating of zinc-rich compound. Casing panels shall be constructed of corrosion resistant, fiberglass, reinforced polyester (FRP) Coil Casing Assembly A. The evaporative condenser shall include a coil casing section consisting of refrigerant condensing coil, spray water distribution system, drift eliminators, and air plenum with fan assemblies as indicated by the manufacturer. 1. The refrigerant condensing coil shall be fabricated of continuous lengths of all prime surface steel at the manufacturer s own facility, and hot-dip galvanized after fabrication. a. The refrigerant condensing coil shall be tested at 375 psig (2687 kpa) air pressure under water. b. The refrigerant condensing coil shall be designed for low pressure drop with sloping tubes for free drainage of liquid refrigerant. 2. Water shall be distributed evenly over the coil at a minimum flow rate of gpm/ft 2 (6.8 l/(s.m 2 ) to ensure complete wetting of the coil at all times. Large-diameter, non-clog, 360 plastic distribution nozzles shall be spaced across the coil face area in Schedule 40 PVC spray branches. a. Nozzles and spray branches shall be observable and accessible for cleaning from the outside of the evaporative condenser during condenser operation without the removal of other components. b. Spray branches and nozzles shall be held in place by snap-in rubber grommets, allowing quick removal of individual nozzles or complete branches for cleaning or flushing. 3. Removable PVC drift eliminators shall be positioned to prevent moisture from entering the air plenum and incorporate a minimum of three (3) changes in air direction to limit drift loss to.001% of total water circulation rate. 4. Fan(s) shall be heavy-duty, axial flow type with aluminum alloy blades driven by a one-piece, multi-groove neoprene/polyester belt designed for a minimum of 150% of the motor nameplate horsepower. a. Fan(s) and shafts shall be supported by heavy-duty, selfaligning, grease-packed ball bearings with moisture-proof seals and integral sealer rings, designed for a minimum L life of 40,000 hours (280,000 hours average life). b. Fan and motor sheaves shall be fabricated from corrosionresistant materials. c. Fan motor(s) shall be totally enclosed, air-over (TEAO) type with a 1.15 service factor, suitable for volt, phase, Hz electrical service and shall be mounted on an easily adjusted, heavy-duty motor base. d. The motor shall be furnished with double-sealed, permanently lubricated bearings and special moisture protection on windings, shafts and bearings. e. Air plenum shall provide a minimum of 48 (1220 mm) clearance under the motor base to provide comfortable working space for service personnel Pan Assembly A. The evaporative condenser shall include a pan assembly consisting of cold water basin with pump assembly, heat transfer section for spray water cooling with integral drift eliminators, and wide-spaced air inlet louvers. 1. The cold water basin shall be constructed of heavy gauge steel panels and structural members. Basin shall include a depressed section with drain/cleanout connection. The basin area under the wet deck surface shall be sloped toward the depressed section to facilitate cleaning. - OR - 1. The cold water basin shall be constructed of heavy gauge Type 304 stainless steel panels and structural members, with all welded seams. The welded stainless steel basin shall be leak tested at the factory. Basin shall include a depressed section with drain/cleanout connection. The basin area under the wet deck surface shall be sloped toward the depressed section to facilitate cleaning. 2. The cold water basin shall include: a drain/clean-out connection; a steel strainer; a brass make-up valve; overflow connection; and a water recirculation pump assembly. a. Cold water basin shall be designed so that the strainer, makeup valve and float, and pump assembly are easily accessible without removing any of the unit panels or other components. b. Lift-out steel strainer shall be supplied with perforated openings sized smaller than the water distribution nozzle orifices and an integral anti-vortexing hood to prevent air entrainment. c. Water recirculation pump shall be a close-coupled, bronzefitted centrifugal pump equipped with a mechanical seal, mounted on the basin and piped from the suction strainer to the water distribution system i. The pump shall be installed with adequate drains so that it may drain freely when the basin is drained ii. The pump assembly shall include an integral metering valve and bleed line to control the bleed rate from the pump discharge to the overflow connection. iii. The pump motor shall be totally enclosed, fan-cooled (TEFC) type suitable for v, phase, Hz electrical service. d. On installations requiring a remote sump, the evaporative condenser shall be modified to accommodate the use of an independent sump and pump for recirculating water (by others). i. The recirculating water pump, steel strainer, make-up valve, and integral bleed line assemblies shall be omitted from the evaporative condenser scope of supply. ii. The evaporative condenser shall be supplied with a cold water basin outlet sized and located as indicated on the drawings for gravity drain to the remote sump. iii. The water distribution system shall have a design operating pressure of 1 psig (8.25 kpa) at the evaporative condenser spray water inlet connection.

53 3. The heat transfer section shall consist of wet-deck surface with integral drift eliminators for cooling the spray water leaving the coil to optimize the thermal performance of the evaporative condenser. a. The wet deck surface and integral drift eliminators shall be formed from polyvinyl chloride (PVC). b. The wet deck surface and integral drift eliminators shall be virtually impervious to rot, decay, fungus, or biological attack. 4. The air inlet louvers shall be manufactured of wave-formed, fiberglass-reinforced polyester (FRP) widely spaced to minimize air resistance and prevent water splash-out Optional Equipment Specifications A. Evaporative condenser shall be provided with basin heaters to prevent freezing of the pan water when the evaporative condenser is idle. 1. The basin heaters shall be selected to maintain +40 F (4.4 C) basin water temperature at a 0 F (-17.8 C) ambient temperature and mph (16.1 km/hr) wind speed. 2. Basin heaters shall be electric immersion type controlled by a remote thermostat with the sensing bulb located in the basin water. 3. Basin heaters shall be provided with a low water level cut-out switch to prevent heater operation unless the heater elements are adequately submerged. B. Evaporative condenser shall be provided with extended lubrication lines with standard grease fittings for lubricating the fan shaft bearings from the outside base of the condenser. C. Evaporative condenser shall be supplied with dedicated motors and drives so that each fan can be cycled independently. D. Evaporative condenser shall be provided with a factory assembled, field-installed external platform with an access ladder and handrails complying with OSHA standards and regulations to provide access to the top of the evaporative condenser. 1. External platform shall have a 24 (6 mm) wide non-skid walking surface and 48 (1220 mm) high safety railings. 2. Optional ladder safety cage shall be available to meet OSHA requirements as necessary. Or, for CXV-T Models D. Evaporative condenser shall be provided with factory assembled, field installed perimeter safety railings and walking surface above coil air intake to provide access to the top of the evaporative condenser. E. Evaporative condenser shall be provided with a moveable ladder with fixed ladder supports to provide access to the fan drive system and coil assembly. F. Evaporative condenser shall be provided with an internal walkway at the access door to facilitate servicing the unit. G. Evaporative condenser shall be provided with a factory assembled internal working platform with ladder to provide a permanent working surface for maintenance personnel (CXV- 193 and larger only). H. Evaporative condenser shall be provided with the ENERGY- MISER Fan System, which provides two-single speed fan motors, one sized for full horsepower and load, the other sized for 1/3 the full horsepower and approximately 75% full load for capacity control and stand-by protection from drive or motor failure. I. Evaporative condenser shall be supplied with a right angle gear drive designed specifically for evaporative condenser service. All gears shall have a minimum service factor of 2.0 based on design fan horsepower. An oil level fill port and sight glass shall be located on the gear drive to facilitate routine inspection and maintenance. Steel Support Details The primary support arrangement for the CXV is two parallel I-beams continuously supporting the full length of the unit. Alternates include a cantilevered plan, with a minimum D dimension indicated in the table below, or transverse steel. When unit is supported with a cantilever plan, the side opposite the air intake shall be cantilevered. The steel support serves to adequately support the unit and may also serve to raise the unit above any solid foundation to assure access to the bottom on the basin. Beam size should be calculated in accordance with accepted structural design practice. The maximum permissible beam deflection and center line distances between bolt holes are tabulated below. 1 1/8" Model Number D Optional Minimum D Max. Deflection CXV-64 to 95 8'-3" 6'-0" 3/16" CXV-3 to 153 8'-3" 6'-0" 5/16" CXV-160 to 192, 206 8'-3" 6'-0" 3/8" CXV-196 to '-7 3/4" 9'-6" 3/8" CXV-3 to '-7 3/4" 9'-6" 1/2" CXV-N465 to N687 11'-7 3/4" 9'-6" 1/2" CXV-420 to 6 11'-7 3/4" 9'-6" 3/8" CXV-620 to '-7 3/4" 9'-6" 1/2" 1 7/16" A/2 A D STEEL SUPPORT AIR IN Model Number A Max. Deflection CXV-T645 to T792 23'-9 5/8" 1/2" CXV-T791 to T944 26'- 5/8" 1/2" CXV-T1290 to T '-9 5/8" 1/2" CXV-T1654 to T '- 5/8" 1/2" 23

54 BAC s Commitment to Engineering Performance Since 1938, Baltimore Aircoil Company has specialized in the design and manufacture of evaporative condensers and has become a worldwide leader in this field. BAC s continuing hallmark of engineering research and development has resulted in countless design and performance innovations, as hundreds of patents attest. Evaporative condenser research and product development programs are conducted at the world s largest Evaporative Condenser Test Facility located at BAC s Corporate Research and Development Laboratory. The BAC test facilities are a working testament to BAC s unrivaled commitment to thermal performance testing and our decades-long pursuit to develop programs for independent certification of thermal performance ratings. Manufacturing Worldwide Manufacturing facilities are strategically located to support BAC s position as the premier evaporative condenser manufacturer worldwide. Baltimore Aircoil P.O. Box 7322, Baltimore, MD Phone: FAX: Website: Printed in the U.S.A. SEN-M-03/03

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