AFVX-E Series (High Ambient) 50Hz Air Cooled Screw Flooded Chillers Cooling Capacity: 85 to 48 TR (299 to 692 kw) R34a Products that perform...by people who care
INTRODUCTION For more than 00 years, Dunham-Bush has focused on innovative product development. Today, we provide a full portfolio of HVAC/R products from Fan Coil Units to large centrifugal chillers as well as many other innovative green solutions. Our commitment to innovation, matched with an aggressive attitude toward growth, makes Dunham-Bush a leader in global markets. Our product development is tailored to meet the specific needs of customers, building-by-building, country-by-country and region-byregion. No other HVAC/R manufacturer takes this approach to meeting your performance expectations. The Dunham-Bush name is synonymous worldwide with the Rotary Screw Compressor Chillers technology. With over 40 years of proven experience and track records in manufacturing and installation of Rotary Screw Compressors and chillers, thousands of our Chillers have clocked more than 00,000 operating hours without any compressor tear-out or overhaul! As a pioneer and industry leader in the Rotary Screw compressor technology for HVAC/R systems, Dunham-Bush now introduces the Air Cooled Rotary Screw Flooded Chillers with unsurpassed performance and reliability. AFVX-E-5HR, Air Cooled Screw Flooded Chillers, have a cooling capacity range from 85 to 48 TR [299 to 692 kw] in 50Hz version using environmentally sound R34a refrigerant. The entire product line features high energy efficiency, installation ease, control flexibility, high reliability and advanced 2020i controller. TABLE OF CONTENT Page No Introduction... 2 Nomenclature... 2 Advantages of Flooded Chiller... 3 Components... 5 Standard Features... 5 Unit Features... 6 Operating Benefits... 2 Unit Options... 3 Unit Accessories... 3 Typical Sequence of Operation... 4 Application Data... 5 Page No Physical Specifications... 6 Performance Data... 9 Dimensional Data... 2 Floor Loading Diagram... 25 Dimensional Clearance... 27 Pressure Drop... 28 Condenser Fan... 29 Sound Pressure Data... 30 Electrical Data... 30 Typical Wiring Schematic... 3 Guide Specifications... 34 NOMENCLATURE A F V X - E 85 S - 5 H R Air Cooled Chiller R34a Flooded Evaporator Vertical High Ambient 5-50Hz 6-60Hz Screw Compressor High Efficiency S - Single Compressor Blank - Two Compressors Nominal TR - 2 -
ADVANTAGES OF FLOODED CHILLER In a flooded evaporator the refrigerant surrounds the tubes in the shell and the water to be cooled flows through the tubes. The level of liquid refrigerant in the shell is maintained by the combined action of an electronic level controller and mod-motor actuated ball valves which modulates the subcooled liquid refrigerant into the evaporator. Thus ensure that all the evaporator tubes are completely immersed in the liquid refrigerant for better heat transfer efficiency. For a Direct Expansion (DX) Evaporator the refrigerant is expanded into the tubes while the chilled water is circulated through the shell. Thermostatic expansion valve is used to throttle the refrigerant in maintaining constant superheat of suction gas to the compressor. The following are the advantages of using flooded chiller:. Higher Capacity and Higher EER Achievable with the Same Compressor The flooded evaporator with all the copper tubes immersed in the boiling liquid refrigerant enable a small approach temperature between the boiling liquid refrigerant temperature in the shell and the outlet chilled water temperature in the evaporator tubes to be achieved. This approach temperature or temperature difference between the evaporating temperature of the boiling liquid refrigerant and the chilled water outlet temperature, for a flooded evaporator, is typically less than 3 F [.7 C]. On the contrary, for a DX or Direct Expansion Evaporator, the typical approach temperature is between 8 F [4.4 C] to 0 F [5.5 C]. This simply means that for the same compressor in a flooded evaporator system will operate at a higher saturated evaporating temperature when compare to the same compressor in a DX Evaporator system, when outlet chilled water temperatures in both cases are set at the same temperature. Figure shows the typical Dunham-Bush screw compressor capacity performance curve at a particular condensing temperature over saturated evaporating temperature of between 30 F [-. C] to 50 F [0 C], and the typical power input curve over the same conditions. It can be noted that the same compressor when operating with a flooded evaporator will generates approximately 3.% more cooling capacity while kw input increases negligibly of less than 3.6%. Therefore, same compressor when coupled to a flooded evaporator will typically achieve higher cooling capacity with correspondingly higher Energy Efficiency Ratio (EER) or (BTU/Watt) or lower kw/tr. DX Evaporator uses TXV throttling to maintain about 0 F [5.5 C] to 5 F [8.3 C] suction superheat to prevent liquid flood back to compressor. In a flooded evaporator, the refrigerant boils off in the shell and gas only can be sucked out from the top of evaporator back to compressor. The suction superheat is usually about 2 F [. C] to 3 F [.7 C]. Reduction in suction superheat will further increase the capacity performance of the compressor. DX Evaporators are typically designed with higher tube velocities to ensure proper oil return to compressor both at full load and at reduced load. This will contribute to higher refrigerant pressure drop through the evaporator. On the contrary, there is very little shell side pressure losses for a flooded evaporator. Therefore, lower suction pressure drop in flooded design will impose less capacity penalty on the compressor and this further enable the compressor in a flooded evaporator to general more capacity than one in a DX Evaporator. FIGURE - 3 -
ADVANTAGES OF FLOODED CHILLER 2. Better Part Load Performance The Dunham-Bush Air Cooled Flooded Chiller with its sophisticated controller control and patented oil management system ensure all evaporator tubes are completely immersed in the boiling liquid refrigerant to achieve superior heat transfer efficiency while ensuring adequate oil return to the compressor(s). This ensures superior full-load efficiency and even better part-load efficiency as the full heat transfer surface areas of the evaporator tubes are utilized even at part-load conditions. On the contrary, in the direct expansion evaporator, because of the need to maintain adequate refrigerant gas velocities in the evaporator tubes for proper oil return, it is typical for certain bundle of evaporator tubes to be blocked or baffled off at part-load conditions. Therefore not utilizing the full-load transfer surface of the evaporator tubes means lower efficiency when compared with flooded evaporator chiller at part-load conditions. 3. Flash Economizer/ Vapor Injection Cycle for Increase Capacity and Higher EER The renowned Dunham-Bush vertical screw compressor allows for flash economizer vapor injection cycle to be incorporated, increasing capacity by as much as 25% with marginal 0% to 5% increase in kw-input. Most of Dunham-Bush s competitors who produce Rotary Screw Chillers do not incorporate flash-economizer vapor injection cycle- not to mention flooded evaporator! 4. Excellent Capacity Modulation in Response to Building Loads Dunham-Bush utilizes its state-of-the-art Vision 2020i controller in combination with the electronic level controller and mod-motor actuated ball valves to ensure instantaneous and precise feeding of liquid refrigerant to the flooded evaporator in response to changes in building loads demand; and maintains precise (±/2 F) preset outlet chilled water temperatures even at very low load conditions; whereas most of Dunham-Bush s competitors, in screw chillers, still utilizes the conventional centrifugal chiller method of using orifice plates to modulate refrigerant feed to the evaporator; and as such their machines does at function efficiently at low-load conditions and can encounter oil return problem! 5. Maximum Reliability and Redundancy Today, the Dunham-Bush vertical screw compressors are increasingly accepted for its reliability. The 2-compressor models are designed to have 2 independent refrigerant circuits for redundancy. Individual compressor is provided with suction stop valve*, suction check valve, discharge stop valve* and other isolating valves in the oil management system to allow complete isolation of an unlikely faulty compressor without contaminating the refrigerant system. 6. Cleanable Evaporator For a single pass evaporator join in a row, the end plates at both ends of the water boxes (2 pass only at return end and pass u arrangement only at u elbow end) can be removed easily without dismantling the chilled water piping connections, for inspection and for mechanical tubes cleaning with brushes or auto-brush. This will enable low tube fouling factor in the evaporator to be ensured, thus maintaining system efficiency. 7. Lower Water Side Pressure Drop In a DX Evaporator, the water flows transversely over the outside of the tubes. The water flow is guided with vertical baffles. This will have higher-pressure drop as compared with the water flow in the tubes of a flooded evaporator. In other words, the flooded chillers will require smaller water pumps to operate at lower power consumption. 8. Commonly Use In Large Tonnage Chillers Where Efficiency Is Critical As a general rule, the DX Evaporator are typically used in small and medium tonnage chillers where efficiency is not important and the low initial cost is the main consideration! However, with increasing energy cost and the drive to reduce global warming, flooded evaporator chillers will increasingly become more popular not only in the large tonnage but also in the small and medium tonnage chillers. Dunham-Bush, again, leads the industry in this respect! *Except for 226mm compressor series - 4 -
COMPONENTS Compact, quiet hermetic rotary screw compressors Direct driven fans Vapor injection cycle for increase capacity and improve efficiency Controller for safety protections, precise and reliable control V-coils configuration for small floor space requirement Rigid structural steel base to prevent unit deflection and coils and piping damage during hoisting Bolted construction for easy semi knockdown assembly at site in case of hoisting problem Flooded evaporator with cleanable and removable enhanced copper tubes STANDARD FEATURES Size / Range 8 models from 85 to 48 TR [299 to 692kW] at AHRI standard conditions. Multiple compressor models provide redundancy, and superior part load efficiency. Compressor(s) Improved, quiet, reliable MSC Vertical Rotary Screw Compressors with up to 2 integral oil separators. Optimized for R34a and optimized volume ratio for best efficiency. Improved rpm and noise level. Optimized rotor drive. Improved rotor and anti-reverse rotation bearing design. Optimized VI port position and geometry. Compartmentalized to reduce noise breakout. Multiple rotary screw compressors design for better reliability and redundancy. Welded hermetic design with no requirement for internal parts service, no periodic compressor tear down and overhaul, and eliminates casing leakages. Consistent loading and unloading with dependable slide valve mechanism. No external oil pump required. Double-delta motor winding with /3 lock-rotor amps at start-up. Star-delta motor winding for MSC 226 mm series. Faulty or damaged compressors reworkable at minimal cost at various Dunham-Bush s authorized compressors reworked facilities. To ensure minimum downtime during rework of faulty or damaged compressor, Dunham-Bush can arrange to provide a substitute reworked compressors while the faulty compressor is being reworked or repaired. Vapor injection cycle to increase capacity and improve efficiency. Evaporator One pass for 2 compressors models and 2 pass for single compressor models. Cleanable and removable integral fin copper tubes for easy serviceability. For a wide variety of applications. Removable water heads for service. Flange/victaulic water connections for quick installation or service (refer Dimensional Data). Build according to ASME code, PED whenever required. JKKP approval. Relief valves(s) standard 3/4 [9mm] FPT. - 5 -
STANDARD FEATURES Controller/ Factory Packaged Power Panel Proactive advanced controller adapts to any abnormal operating conditions and for safety protections. Tolerant and accommodating of extreme conditions at start-up. Capable of controlling multiple chillers, pumps, and etc. Circuit breaker on each multiple compressors unit. Unit mounted step-start contactors and delay for reduced inrush starting current. Current and voltage transformers. Under and voltage phase protection relay. Indicator lights for compressor overloads, micro alarm, control power, compressor control circuit, and etc. Condenser Coil/ Fans Constructed with seamless inner-grooved copper tubes expanded into die-formed aluminum fins in staggered configuration. Leaked and pressure tested to 450psig [3bar]. High efficiency low-noise condenser fan. V coil design to increase condensing surface area. V coil with internal baffle for fan cycling and fan staging. UNIT FEATURES ADVANCED CONTROLLER Vision 2020i a flexible and advance programmable microprocessor controller designed specifically for the application and precise control of Dunham-Bush Rotary Screw compressor chillers. The controller board is provided with a set of terminals that connect to various devices such as temperature sensors, pressure and current transducers, solenoid valves, compressors and fans contactors, control relays etc. Three sizes of controller boards are provided to handle different number of input and output requirements: DB3-S small, DB3-M medium and DB3-L large board. The unit algorithm program and operating parameters are stored in FLASH-MEMORY that does not require a back-up battery. The program can be loaded through PC or programming key. Vision 2020i controller is equipped with a user friendly terminal with a semi-graphic display and dedicated keys that provides easy access to the unit operating conditions, control set points and alarm history. Each unit s controller can be configured and connected to the local DBLAN network that allows multiple units sequencing control without additional hardware. The DBLAN is local area network made up of several chillers controller. Display and User Terminal The Vision 2020i controller is designed to work with a user friendly back-lit 32 by 64 pixels DBG Semi-Graphic Display panel connected with the controller through a telephone cable. The terminal allows carrying out of all program operations and also allows the unit working conditions, compressor run times and alarm history to be displayed. Set points and other parameters can be modified via the user terminal. The display has an automatic self-test of the controller on system start-up. Multiple messages will be displayed automatically by scrolling from each message to the next. All of these messages are spelled out in English on the display terminal. - 6 -
UNIT FEATURES There are 5 dedicated buttons to enable the user to access information, based on the security level of the password. For more detail operation of the DBG Display Terminal, please refer to the Unit Operation Manual. Easily accessible measurements include: Leaving chilled water temperature Entering chilled water temperature Compressor discharge temperature Leaving chiller water temperature derivative Evaporator Pressure Condenser Pressure Compressor amp draw of each compressor Compressor elapsed run time of each compressor Compressor starts status Oil level sensor status Water temperature reset value Water flow switch status External start/stop command status Optional ambient temperature is available. With this option the operator can quickly and accurately read all significant temperatures and eliminate the need for thermometers. Voltmeter is also offered as an optional feature. Capacity Control Leaving chilled water temperature control is accomplished by entering the water temperature setpoint and placing the controller in automatic control. The unit will monitor all control functions and move the slide valve to the required operating position. The compressor ramp (loading) cycle is programmable and may be set for specific building requirements. Remote adjustment of the leaving chilled water setpoint is accomplished either through direct BMS protocols connection to the controller communication ports, or from an external hardwired control signal from BMS to supply a chilled water reset 4 to 20mA analog input signal. Remote reset of compressor current limiting function may be accomplished in a similar fashion. System Control The unit may be started or stopped manually, or through the use of an external signal from a Building Automation System. In addition, the controller may be programmed with seven-day operating cycle or other Dunham-Bush control packages may start and stop the system through inter-connecting wiring. System Protection The following system protection controls will automatically act to ensure system reliability: Low suction pressure High discharge pressure Freeze protection Low differential pressure Low oil level Compressor run error Power loss Chilled water flow loss Sensor error Compressor over current Compressor Anti-recycle The controller can retain up to 99 alarm conditions complete with time of failure together data stamping on critical sensor readings in an alarm history. This tool will aid service technicians in troubleshooting tasks enabling downtime and nuisance trip-outs to be minimized. Remote Monitoring Vision 2020i controller can be completed with an optional RS485 communications card and NETVISOR software for remote monitoring and controlled from a PC terminal and optional phone modem. With various optional add-on cards the Vision2020i controller can also be interfaced directly to the Building Management System (BMS) with the standard communication protocols using MODBUS, LONWORKS, BACNET MSTP as well as over IP. This sophisticated feature makes servicing easier and more convenient to the system. The controller as standard is additionally equipped with history files which can be used to take logs and which may be retrieved via the phone modem or internet connection periodically. Now owners of multiple buildings have a simple and inexpensive method of investigating potential problems quickly and in a highly cost effective manner. - 7 -
UNIT FEATURES The Revolutionary Dunham-Bush Vertical Screw Compressor Dunham-Bush introduced the revolutionary Vertical Screw Compressors in the early 970 s. Since then, the compressor has undergone several design changes to improve efficiency, and reliability! Today, The Dunham-Bush vertical screw compressors is not only the most efficient and reliable screw compressor in its capacity range; but it is the most completely packaged rotary Screw Compressors for use in flooded chillers! The Dunham-Bush vertical screw compressor and motor assembly is completely housed in an integral oil separator heavy-duty steel casing -- therefore eliminating the need for an external oil separator and its associated piping connections. Now the compressor oil separator is improved to 2. The compressor does not require an external oil pump as it lubricates the bearing and rotors by use of the pressure differential between the discharge and suction cavities of the compressor. Thus, there is also no need for an external compressor oil cooler and its associated piping connections. The compressor is completely sealed to prevent leakage and there is no need to service the few internal moving parts of the compressor. 2 ND OIL SEPARATOR ST OIL SEPARATOR MOTOR DISCHARGE OIL DEFLECTOR CAP REPLACEABLE SUCTION FILTER SUCTION CHECK VALVE SUCTION MALE (DRIVE) ROTOR OIL STRAINER Compressor Assembly The Dunham-Bush rotary screw compressor is a positive displacement helical-axial design optimised for use with specific refrigerants. The compressor consists of two intermeshing helical grooved rotors, a male drive rotor and a female driven rotor, in a stationary housing with suction and discharge gas ports. Uniform gas flow, even torque and positive displacement, all provided by pure rotary motion contributes to vibration-free operation over a wide range of operating conditions. Intake and discharge cycles overlap, effectively producing a smooth, continuous flow of gas. No oil pump is required for lubrication or sealing purposes. Oil is distributed throughout the compressor by the pressure differential between the suction and the discharge cavities. Simplified Capacity Control The slide valve mechanism for capacity modulation and part load operation is outstanding feature: The moving parts are simple, rugged and trouble-free. The slide mechanism is hydraulically actuated. Package capacity reduction can be down to as low as 2.5% without HGBP by stepless movement of slide valves. Capacity reduction is programmed by an exclusive electronically initiated, hydraulically actuated control arrangement. - 8 -
UNIT FEATURES Positive Displacement Direct Drive The compressor is directly connected to the motor without any complicated gear systems to speed up the compressor and thus detract from the overall unit reliability. Oil Separation Each compressor is provided with up to 2 integral oil separators/impingement plate located below the discharge gas port. The separator is a multi-layered mesh element which effectively separates oil from the gas stream. The oil drains into sump and discharge gas passes around the deflection plate. An oil drain valve is located near the bottom of the oil sump. Each rotor is fitted with a set of anti-friction tapered roller bearings. They carry both radial and thrust loads. Anti-reverse rotation bearings are used. Rotors The latest asymmetrical rotor profiles of patented Dunham-Bush design assure operation at highest efficiencies. Rotors are precision machined from high strength alloy steel and precision ground, inhouse. Castings All housings are manufactured of high grade and low porosity cast iron. Solid State Motor Protection The motor winding protection module used in conjunction with sensors embedded in the compressor motor windings is designed to prevent the motor from operating at unsafe operating temperatures. The overloads for the motor are also solid state. FIG. A FIG. B FIG. C FIG. D Compressor Operation Note: For clarity reasons, the following account of the compressor operation will be limited to one lobe on the male rotor and one interlobe space of the female rotor. In actual operation, as the rotors revolve, all of the male lobes and female interlobe spaces interact similarly with resulting uniform, non-pulsating gas flow. Suction Phase As a lobe of the male rotor begins to unmesh from an interlobe space in the female rotor, a void is created and gas is drawn in tangentially through the inlet port-- Fig. A. --as the rotors continue to turn the interlobe space increases in size-- Fig. B. --and gas flows continuously into the compressor. Just prior to the point at which the interlobe space leaves the inlet port, the entire length of the interlobe space is completely filled with drawn in gas -- Fig. C. Compression Phase As rotation continues, the gas in the interlobe space is carried circumferentially around the compressor housing. Further rotation meshes a male lobe with the interlobe space on the suction end and squeezes (compresses) the gas in the direction of the discharge port. Thus the occupied volume of the trapped gas within the interlobe space is decreased and the gas pressure consequently increased. Discharge Phase At a point determined by the designed "built-in" compression ratio, the discharge port is covered and the compressed gas is discharged by further meshing of the lobe and interlobe space--fig D. While the meshing point of a pair of lobes is moving axially, the next charge is being drawn into the unmeshed portion and the working phases of the compressor cycle are repeated. - 9 -
UNIT FEATURES Compressor Fully Unloaded Compressor Fully Loaded Slide Valve Control Movement of the slide valve is programmed by an exclusive Dunham-Bush electronically initiated (by variations in leaving chilled water temperature) hydraulically actuated control arrangement. When the compressor is fully loaded, the slide valve is in the closed position. Unloading starts when the slide valve is moved back away from the valve stop. Movement of the valve creates an opening in the side of the rotor housing. Suction gas can then pass back from the rotor housing to the inlet port area before it has been compressed. Since no significant work has been done on this return gas, no appreciable power losses are incurred. Reduced compressor capacity is obtained from the gas remaining in the rotors which is compressed in the ordinary manner. Enlarging the opening in the rotor housing effectively reduces compressor displacement. REFRIGERATION CYCLE Dunham-Bush rotary screw air cooled chillers are designed for efficiency and reliability. The rotary screw compressor is a positive displacement, variable capacity compressor that will allow operation over a wide variety of conditions. Even at high head and low capacity, a difficult condition for centrifugal compressors, the rotary screw performs in a stable manner. It is impossible for this positive displacement compressor to surge. The refrigerant management system, however, is very similar to centrifugal water chillers and is shown in the refrigerant cycle diagram below. Liquid refrigerant enters the flooded evaporator uniformly where it absorbs heat from water flowing through the evaporator tubes. The vaporized refrigerant is then drawn into the suction port of the compressor where the positive displacement compression begins. This partially compressed gas is then combined with additional gas from the flash economizer as the vapor injection port at an intermediate pressure is exposed to each interlobe space. Compressed gaseous refrigerant is then discharged into the integral oil separator where oil, which is contained in the refrigerant vapor, is removed and returned to the oil sump. Fully compressed and superheated refrigerant is then discharged into the condenser, where air is being drawn through the condenser tube by the propeller fan cools and condenses the refrigerant. Liquid refrigerant then passes through the first expansion device and into the flash economizer where flash gas and liquid refrigerant are separated. - 0 -
UNIT FEATURES The gaseous refrigerant is then drawn out of the flash economizer and into the vapor injection port of the compressor. The remaining liquid refrigerant then passes through a second expansion device which reduces refrigerant pressure to evaporator levels where it is then distributed evenly into the evaporator. By removing the flash gas from the flash economizer at an intermediate pressure, the enthalpy of the refrigerant flowing into the evaporator is reduced which increases the refrigeration effect and improves the efficiency of the refrigeration cycle. Refrigerant flow into and out of the flash economizer is controlled by modulating valves which eliminate the energy wasting hot gas bypass effect inherent with fixed orifices. PART-LOAD PERFORMANCE Through the use of flash economizer modulating flow control and multiple compressors, Dunham- Bush rotary screw air cooled chillers have some of best part-load performance characteristics in the industry. In most cases, actual building system loads are significantly less than full load design conditions, therefore chillers operate at part load most of the time. Dunham-Bush rotary screw air cooled chillers combine the efficient operation of multiple rotary screw compressors with an economizer cycle and microprocessor control to yield the best total energy efficiency and significant operating saving under any load. When specifying air conditioning equipment, it is important to consider the system load characteristics for the building application. In a typical city, the air conditioning load will vary according to changes in the ambient temperature. Weather data compiled over many years will predict the number of hours that equipment will operate at various load percentages. - -
OPERATING BENEFITS Efficiency and Reliability COMPRESSOR EXPERIENCE 40 years of rotary screw experience and dedicated technological advancements. Compressors are CE listed. Simply designed for high reliability with only two rotating parts. No gears to fail. Ensured continuous oil flow to each compressor through integral high efficiency oil separation for each compressor. Chillers use multiple rotary screw compressors for fail-safe reliability and redundancy. ENERGY EFFICIENCY Designed to provide the greatest amount of cooling for the least kilowatt input over the entire operating range of your building. Delivers outstanding efficiency and total energy savings through the utilization of economizer cycle and microprocessor controlled staging producing greater capacity with fewer compressors. Maximized performance through computermatched components. High efficiency oil recovery system guarantees removal of oil carried over in the refrigerant and maintains the heat exchangers at their maximum efficiency at both full and part load. OPTIONAL ADVANTAGES Dramatic payback in reduced maintenance and overhaul costs both in down time and in labor expenditures. Ease of troubleshooting through microprocessor retention of monitored functions. Factory run tested. SAFETY CODE ASME Boiler and Pressure Vessel Code, Section VIII Division "Unfired Pressure Vessels". JKKP Code. ASME Standard B3.5 Refrigeration Piping. ASHRAE Standard 5 Safety Code for Mechanical Refrigeration. IEEE. Safety quality license for import boiler and pressure vessel, China. Optional PED Approval. REFRIGERANT COMPATIBILITY Designed to operate with environmentally safe and economically smart HFC-34a with proven efficiency and reliability. Consult Factory for use of other HFC refrigerants. CONTROL FLEXIBILITY Controller-based with DDC (direct digital control) features precise push button control over every aspect of operation with built-in standard features that allow extra energy savings on start-up and throughout the life of your equipment. Ensured uniform compressor loading and optimal energy efficiency through microprocessor controller which utilize pressure transducers to measure evaporator and condenser pressure. Lower energy costs resulting from automatic load monitoring and increased accuracy and efficiency in compressor staging. Monitor your chiller's key functions from a remote location with a simple, low costs, phone modem option. Proactive control by controller that anticipates problems and takes corrective action before they occur. Controls will unload compressor(s) if head or suction pressure approach limits. This will enable unit to stay on the line while warning operator of potential problems. - 2 -
UNIT OPTIONS Options Installed At The Factory Controller (Vision 2020i) - A standard feature for all models. Controller monitoring of return chilled water and leaving chilled water temperature. Heat reclaim condensers (desuperheaters) are available for special applications. Unit mounted disconnect for each compressor and control circuit with fuses and fuse block. Copper Condenser Fins - Copper fins offer better corrosion protection for severe conditions. In more corrosive environments, hydrophilic or Adsil-coated fins would be more appropriate. Indicator Light Set - Provides indicator lights for control power, motor overload, high motor temperature and alarm status. Hot Gas Bypass - Consists of hot gas bypass regulator(s) and solenoid valve(s) for each circuit for applications with a minimum load which may dip below the unit s minimum unloaded capacity. Control Circuit Transformer - appropriate KVA rating to power the 5//50 control circuit and compressor oil heaters off the service voltage. 5V Convenience Outlet - Duplex outlet located inside the control panel and protected by a 5 amp fuse. Over/Undervoltage and Phase Protection Relay - Protects against low or high incoming voltage conditions as well as phase loss, phase reversal and phase imbalance by opening the control circuit. It is an automatic reset device. Low Ambient Controls (LAC option) - Kindly refer to Low Ambient Operation/ Freeze Protection. Compressor Start Counter - One start counter provided for each compressor, located inside the control panel. Compressor Elapsed Time Meter - One elapsed time meter to register run hours per compressor, located inside the control panel. Three Phase Ammeter - Single analog ammeter with a 3 phase selector switch for indication, located inside the control panel. Three Phase Voltmeter - Single analog voltmeter installed with a 3 phase selector switch for indication, located inside the control panel. Entering Fluid Temperature Sensor - Temperature sensor installed in evaporator inlet connection to supplement the standard leaving (outlet) fluid temperature sensor. Condenser coil guard protects the condenser coils from harsh environments. UNIT ACCESSORIES Accessories Shipped Unmounted Water Flow Switch - Paddle type field adjustable flow switch available for all units, installed into the unit safety circuit so that the chiller will remain off until there is water flow. Helps to prevent evaporator from freezing. Vapor-proof enclosure, for use on water or glycol systems. The flow switch is to be shipped loose and installed at site. Rubber-in-shear Isolators - Designed for ease of installation, these rubber, one-piece, molded isolators are applicable for most installations. Spring Isolators - These housed spring assemblies have a neoprene friction pad at the bottom to prevent the passage of noise, and a spring locking levering bolt at the top. Neoprene inserts prevent contact between the steel upper and lower housings. Suitable for more critical applications as compared to rubber-in-shear isolators. - 3 -
TYPICAL SEQUENCE OF OPERATION The Dunham-Bush air cooled water chiller depends mainly on its on-board controller for control. Operation described is for a twocompressor units and is very similar for single compressor unit. For initial start-up, the following conditions must be met: Power supply to unit energized. Unit circuit breakers in the on position. Control power switch on for at least 5 minutes. Compressor switches on. Reset pressed on controller keypad. Chilled water pump running and chilled water flow switch made. Leaving chilled water temperature at least 2 F [. C] above setpoint. All safety conditions satisfied. After all above conditions are met, the controller will call for the lead compressor to start. After a one-minute delay, the first contactor (e.g. M-) is energized followed by the second contactor (e.g. M-2) after one-second-time delay. This provides reduced inrush stepped start. The compressor 5- minute anti-recycle timer is initiated at compressor start. The controller monitors compressor amps, volts, leaving water temperature and suction and discharge pressures. The compressor and cooling capacity is controlled by pulsed signals to load and unload solenoid valves on the compressor. When the compressor starts, it is fully unloaded, about 25% of its full load capacity. As the computer gives it load signals, capacity gradually increases. The rate of compressor loading is governed by ramp control which is adjustable in the controller. The controller responds to leaving chilled water temperature and its rate of change which is proportional and derivative control. If leaving chilled water temperature is within the deadband (+/-0.8 F [0.5 C] from setpoint), no load or unload commands are given. If chilled water temperature is above deadband, the controller will continue loading the compressor until a satisfactory rate of temperature decline is observed. If leaving chilled water temperature is below the deadband, the compressor is commanded to unload. Thus the compressor capacity is continuously modulated to match applied load and hold leaving chilled water temperature at setpoint. If the applied load is greater than one compressor can handle, it will load fully and then the controller will call for a second compressor. After one minute, the second compressors will start in the same manner as the first. Then both compressors will be commanded to adjust load to approximately 50%. They are gradually loaded up together until the applied load is satisfied. In this way the two compressors share the load equally. If the applied load decreases to the point that both compressors are running at about 40% capacity, the computer shuts down the lag compressor and loads the remaining compressor to about 90%. If applied load decreases further, the remaining compressor unloads proportionally. If applied load decreases to less than the minimum capacity of one compressor, the leaving chilled water temperature will gradually decline to 2 F [. C] below setpoint, and then the lead compressor will shut down. It will restart automatically if leaving chilled water temperature rises to 2 F [. C] above setpoint and both 5 minute anti-recycle and one minute start delay timers are satisfied. During start-up operation, the controller monitors the difference between discharge and suction pressures to ensure that minimum of 30psi [2bar] differential is available for compressor lubrication. If the difference falls below a minimum of 30psi [2bar], the controller closes refrigerant flow control valves, starving the evaporator, causing evaporator pressure to drop, hence increasing differential pressure. This is especially helpful at startup, when warm chilled water and low ambient temperature would cause a low head situation. This feature is called EPCAS: Evaporator Pressure Control at Startup. It is one of several proactive control features of the controller which overcome potential problems while continuing operation. Two additional proactive features are low suction and high discharge pressure override. If operating pressures approach trip level, compressors are unloaded as necessary to continue operation. - 4 -
APPLICATION DATA Low Ambient Operation / Freeze Protection If unit is required to operate below 65 F [8.3 C], optional head pressure control is required. Glycol is recommended for added protection. If wind in area is over 5 mph [8 kph], a wind barrier is recommended. Desuperheaters A hot gas desuperheater can be factory supplied for field installation. Desupperheater reclaim the desuperheated gas energy for hot water utility. Consult factory for further details. Water Circuit Constant water flow required with a minimum of 3 gallons per TR [3.3 liters/kw] increasing up to 0 gallons per TR [ liters/kw] for process, low load applications with small temperature ranges and/or vastly fluctuating load conditions. Glycol Freeze Protection If the chiller or fluid piping is to be exposed to temperatures below freezing, glycol protection is recommended. The re-commended protection is 0 F [5.6 C] below the minimum ambient temperature. Use only glycol solutions approved for heat exchanger duty. The use of automotive anti-freeze is not recommended because they have short-lived inhibitors and fouling of the vessels will occur. If the equipment is exposed to freezing temperature and not being used, the water in vessels and piping should be drained. The use of glycol causes a performance derate as shown below which needs to be included in the unit selection procedure. Ethylene Glycol % E. G. By Weight Freeze Point F C C Capacity Factor K kw Rate G Flow Factor P P.D. Factor 0 26.2-3.2 0.995 0.998.09.050 5 22.4-5.3 0.99 0.997.030.083 20 7.8-7.9 0.988 0.996.044.2 25 2.6-0.8 0.984 0.995.060.70 30 6.7-4. 0.98 0.994.077.29 35 0.0-7.8 0.969 0.988.097.275 40-0.0-23.3 0.957 0.982.6.33 45-7.5-27.5 0.935 0.970.38.398 50-28.9-33.8 0.93 0.958.6.466 Note: The Correction Factor is for LWT down to 44 F only. Propylene Glycol % P. G. By Weight Freeze Point F C C2 Capacity Factor K2 kw Rate G2 Flow Factor P2 P. D. Factor 0 26. -3.3 0.988 0.994.005.09 5 22.8-5. 0.984 0.992.008.03 20 9. -7.2 0.978 0.990.00.05 25 4.5-9.7 0.970 0.988.05.08 30 8.9-2.8 0.962 0.986.02.20 Note: The Correction Factor is for LWT down to 44 F only. Correction Factor - Elevation Correction Factor - FF Elevation above Sea Level Feet Meters Factor Capacity Correction Factor kw Correction Factor Fouling Factor hr.ft². F/BTU m². C/kW Capacity Correction Factor kw Correction Factor 0 0.00.00 2000 600 0.99.0 4000 200 0.98.02 6000 800 0.97.03 0.0000 0.08.000.000 0.00025 0.044 0.990 0.995 0.00050 0.088 0.970 0.990-5 -
PHYSICAL SPECIFICATIONS Model AFVX-E 85S-5HR 05S-5HR 35S-5HR 65S-5HR 75S-5HR 95-5HR Unit Nominal Capacity TR[kW] 85.5 [300.7] 02.8 [36.5] 34.8 [474.] 62.6 [57.9] 76.5 [620.7] 95.6 [687.9] Unit Nominal Power Input kw 97.0 20. 54.8 84.4 205. 23.5 COMPRESSOR Model (Qty) MSC 25E () MSC 28E () MSC 222E () MSC 227E () MSC 230E () MSC 25E () MSC 28E () RPM 2950 2950 2950 2950 2950 2950 Min. % Unit Capacity 25% 25% 25% 25% 25% 2.5% EVAPORATOR Model (Qty) CR () DR () D2R () JR () KR () DR (2) Water Connector inches[mm] 5 [27] 6 [52] 6 [52] 6 [52] 6 [52] 8 [203] Nominal Water Flow / Pressure Drop USgpm / ft.wg[m³/hr / kpa] 205.0/ 8.5 [46.5/25.4] 246.7/ 7. [56.0/2.2] 323.5/ 9.6 [73.4/28.7] 390.2/ 5.7 [88.6/46.9] 423.6/ 5.7 [96./46.9] 469.4/ 6.8 [06.6/20.3] Min/ Max Water Flow USgpm[m³/hr] 78.5/ 396. [7.8/89.9] 03.9/ 523.2 [23.6/8.8] 7.8/ 587 [26.7/33.2] 7.3/ 586.9 [26.6/33.2] 29.9/ 64.3 [29.5/45.6] 208.5/ 046.4 [47.3/237.5] Min/ Max Water Pressure Drop ft.wg[kpa].6/ 28.7 [4.8/85.8].6/ 28.5 [4.8/85.2].6/ 28.8 [4.8/86.].9/ 33.7 [5.7/00.8].9/ 33.7 [5.7/00.8].6/ 30.0 [4.8/89.7] CONDENSER Coil Rows Deep/ Total Face Area ft²[m²] 4/ 2.9 [.3] 3/ 62.6 [5.] 4/ 88.2 [7.5] 4/ 235.3 [2.9] 4/ 282.3 [26.2] 4/ 282.3 [26.2] No. Of Fan 6 8 8 0 2 2 Fan Diameter inches[mm] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] Motor HP (Qty) 3.0 (6) 3.0 (8) 3.0 (8) 3.0 (0) 3.0 (2) 3.0 (2) FLA, Amps 4.9 4.9 4.9 4.9 4.9 4.9 Total Air Flow cfm[m³/hr] 82593 [40342] 2020 [20408] 8440 [20253] 48050 [25567] 82070 [309373] 79865 [305627] Min. Ambient Temperature At Min. Load F[ C] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] ELECTRICAL Nominal Voltage 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 Unit RLA A 7 23 270 309 354 379 Unit Max. Inrush A 340 395 700 900 960 560 GENERAL Unit Length inches[mm] 74 [4420] 26 [5486] 220 [5588] 280 [72] 322 [879] 38 [8077] Unit Width inches[mm] 88 [2235] 88 [2235] 88 [2235] 88 [2235] 88 [2235] 88 [2235] Unit Height inches[mm] 89 [226] 89 [226] 98 [2489] 98 [2489] 98 [2489] 98 [2489] Approx. Shipping Weight lbs[kg] 952 [452] 0490 [4758] 769 [5338] 3889 [6300] 635 [739] 8277 [829] Approx. Operating Weight lbs[kg] 9307 [4222] 0693 [4850] 987 [5437] 4209 [6445] 6506 [7487] 8822 [8538] Approx. Operating Charge R34a lbs[kg] 225 [02] 268 [22] 355 [6] 446 [202] 484 [220] 536 [243] Note: Nominal capacity is based on evaporator LWT 44 F and condenser ambient 95 F, actual capacity depends on the specified operating conditions. - 6 -
PHYSICAL SPECIFICATIONS Model AFVX-E 25S-5HR 25-5HR 240S-5HR 250-5HR 280-5HR 30-5HR Unit Nominal Capacity TR[kW] 24.8 [755.5] 24.2 [753.3] 24.4 [849.0] 248.8 [875.0] 282.3 [992.8] 309.2 [087.4] Unit Nominal Power Input kw 234.4 233.6 265.0 270.9 32. 342.5 COMPRESSOR Model (Qty) MSC 2233E () MSC 28E (2) MSC 2236E () MSC 28E () MSC 222E () MSC 222E (2) MSC 222E () MSC 227E () RPM 2950 2950 2950 2950 2950 2950 Min. % Unit Capacity 25% 2.5% 25% 2.5% 2.5% 2.5% EVAPORATOR Model (Qty) L2R () JR (2) L3R () JR (2) KR (2) K2R (2) Water Connector inches[mm] 8 [203] 8 [203] 8 [203] 8 [203] 8 [203] 8 [203] Nominal Water Flow / Pressure Drop USgpm / ft.wg[m³/hr / kpa] 55./ 2.2 [7.0/36.5] 54./ 7.8 [6.7/23.3] 580.0/ 3.3 [3.7/39.8] 597./ 0.2 [35.5/30.5] 677.5/.0 [53.8/32.9] 742./. [68.4/33.2] Min/ Max Water Flow USgpm[m³/hr] 8.2/ 904.0 [4./205.3] 236.3/ 35.0 [53.6/306.7] 93.6/ 973.6 [44.0/22.] 236.3/ 35.0 [53.6/306.7] 257.0/ 282.2 [58.3/29.0] 284./ 40.0 [64.5/320.] Min/ Max Water Pressure Drop ft.wg[kpa].9/ 33.5 [5.7/00.0] 2.0/ 40.9 [6.0/22.3].9/ 33.7 [5.7/00.7] 2.0/ 40.9 [6.0/22.3] 2.0/ 36.2 [6.0/08.2] 2.0/ 37.0 [6.0/0.6] CONDENSER Coil Rows Deep/ Total Face Area ft²[m²] 4/ 329.4 [30.6] 4/ 329.4 [30.6] 4/ 376.4 [35.0] 4/ 376.4 [35.0] 4/ 423.5 [39.3] 4/ 423.5 [39.3] No. Of Fan 4 4 6 6 8 8 Fan Diameter inches[mm] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] Motor HP (Qty) 3.0 (4) 3.0 (4) 3.0 (6) 3.0 (6) 3.0 (8) 3.0 (8) FLA, Amps 4.9 4.9 4.9 4.9 4.9 4.9 Total Air Flow cfm[m³/hr] 2245 [360936] 2245 [360936] 242760 [42425] 239820 [407502] 27065 [459064] 266490 [452820] Min. Ambient Temperature At Min. Load F[ C] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] ELECTRICAL Nominal Voltage 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 Unit RLA A 46 43 470 479 550 589 Unit Max. Inrush A 307 582 523 890 952 58 GENERAL Unit Length inches[mm] 364 [9246] 364 [9246] 406 [032] 406 [032] 448 [379] 448 [379] Unit Width inches[mm] 88 [2235] 88 [2235] 88 [2235] 88 [2235] 88 [2235] 88 [2235] Unit Height inches[mm] 98 [2489] 98 [2489] 98 [2489] 98 [2489] 98 [2489] 98 [2489] Approx. Shipping Weight lbs[kg] 8827 [8540] 20383 [9246] 20275 [997] 2247 [068] 27752 [2588] 2866 [2776] Approx. Operating Weight lbs[kg] 9409 [8804] 2062 [9554] 20879 [947] 2330 [0492] 28585 [2966] 29040 [372] Approx. Operating Charge R34a lbs[kg] 65 [279] 588 [267] 79 [326] 708 [32] 804 [365] 880 [399] Note: Nominal capacity is based on evaporator LWT 44 F and condenser ambient 95 F, actual capacity depends on the specified operating conditions. - 7 -
PHYSICAL SPECIFICATIONS Model AFVX-E 340-5HR 355-5HR 365-5HR 435-5HR 460-5HR 480-5HR Unit Nominal Capacity TR[kW] 340.5 [97.5] 353.6 [243.6] 366.2 [287.9] 433.2 [523.6] 458.3 [6.8] 48.4 [693.] Unit Nominal Power Input kw 36.3 382.2 402.7 484. 55.2 549.2 COMPRESSOR Model (Qty) MSC227E (2) MSC 227E () MSC 230E () MSC 230E (2) MSC 2233E (2) MSC 2233E () MSC 2236E () MSC 2236E (2) RPM 2950 2950 2950 2950 2950 2950 Min. % Unit Capacity 2.5% 2.5% 2.5% 2.5% 2.5% 2.5% EVAPORATOR Model (Qty) LR (2) L2R (2) L2R (2) L3R(2) MR(2) MR(2) Water Connector inches[mm] 0 [254] 0 [254] 0 [254] 0 [254] 2 [305] 2 [305] Nominal Water Flow / Pressure Drop USgpm / ft.wg[m³/hr / kpa] 87.2/ 0.3 [85.5/30.8] 848.6/ 8.7 [92.6/26.0] 878.9/ 9.2 [99.5/27.5] 040/.4 [236.2/34.] 0.0/ 0.2 [250.0/30.5] 56.0/ 2.5 [262.5/37.4] Min/ Max Water Flow USgpm[m³/hr] 35.8/ 574.2 [7.9/357.3] 364.5/ 80.4 [82.7/4.0] 364.5/ 80.4 [82.7/4.0] 390.0/ 950.0 [88.5/442.7] 437.9/ 270.0 [99.3/ 492.6] 437.9/ 270.0 [99.3/ 492.6] Min/ Max Water Pressure Drop ft.wg[kpa].9/ 34.7 [5.7/03.8] 2.0/ 35.3 [6.0/05.5] 2.0/ 35.3 [6.0/05.5] 2.0/ 35.6 [6.0/06.4] 2.0/ 34.4 [6.0/02.9] 2.0/ 34.4 [6.0/02.9] CONDENSER Coil Rows Deep/ Total Face Area ft²[m²] 4/ 577.5 [53.6] 4/ 577.5 [53.6] 4/ 577.5 [53.6] 6/ 577.5 [53.6] 6/ 577.5 [53.6] 6/ 577.5 [53.6] No. Of Fan 8 8 8 8 8 8 Fan Diameter inches[mm] 35 7/6 [900] 35 7/6 [900] 35 7/6 [900] 33 7/8 [860] 33 7/8 [860] 33 7/8 [860] Motor HP (Qty) 3.0 (8) 3.0 (8) 3.0 (8) 7.5 (8) 7.5 (8) 7.5 (8) FLA, Amps 4.9 4.9 4.9 9. 9. 9. Total Air Flow cfm[m³/hr] 292572 [49738] 292572 [49738] 292572 [49738] 372645 [63398] 372645 [63398] 372645 [63398] Min. Ambient Temperature At Min. Load F[ C] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] 65 [8.3] ELECTRICAL Nominal Voltage 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 Unit RLA A 627 67 75 860 93 972 Unit Max. Inrush A 92 267 300 703 923 967 GENERAL Unit Length inches[mm] 448 [379] 448 [379] 448 [379] 452 [48] 452 [48] 452 [48] Unit Width inches[mm] 88 [2235] 88 [2235] 88 [2235] 88 [2235] 88 [2235] 88 [2235] Unit Height inches[mm] 22 [3099] 22 [3099] 22 [3099] 2 [3073] 2 [3073] 2 [3073] Approx. Shipping Weight lbs[kg] 30385 [3783] 30847 [3992] 3088 [40] 33394 [548] 34665 [5724] 34866 [586] Approx. Operating Weight lbs[kg] 3024 [4073] 3560 [435] 3805 [4427] 348 [5504] 35887 [6278] 36085 [6368] Approx. Operating Charge R34a lbs[kg] 970 [440] 007 [457] 043 [473] 290 [585] 365 [69] 433 [650] Note: Nominal capacity is based on evaporator LWT 44 F and condenser ambient 95 F, actual capacity depends on the specified operating conditions. - 8 -
PERFORMANCE DATA LWT F 40 42 44 Notes: Model AFVX-E Ambient Temperature, F 85 95 05 5 25 TR kw I TR kw I TR kw I TR kw I TR kw I 85S-5HR 82. 68.8 79.5 79. 76.9 89.3 74.3 99.5 46.2 68.7 05S-5HR 98.7 84.0 95.6 96.5 92.5 08.9 89.3 2.4 55.5 83.8 35S-5HR 29.4 3. 25.3 29.9 2.2 46.7 7. 63.5 72.8 2.8 65S-5HR 56. 33.8 5. 53.7 46.2 73.6 4.3 93.5 87.8 33.5 75S-5HR 69.4 47.0 64. 68.8 58.7 90.7 53.4 22.5 95.3 46.6 95-5HR 89.5 56. 82. 76.8 74.6 97.4 57.0 202.8 92.7 38.7 25S-5HR 206.2 67.3 99.7 92.2 93.2 27. 86.7 24.9 6.0 67.0 25-5HR 207.5 69.0 99.4 9.3 9.3 23.7 7.9 29.5 0.5 50. 240S-5HR 23.8 88.8 224.4 26.9 27. 244.9 209.8 273.0 30.3 88.4 250-5HR 24.0 96.5 23.5 222.5 222. 248.5 99.7 255.3 7.9 74.5 280-5HR 273.4 227.3 262.7 257.3 252.0 287.4 226.5 295.2 33.7 20.9 30-5HR 299.5 253.2 287.8 286.7 276.0 320.2 248. 328.9 46.5 224.9 340-5HR 329.8 269.2 36.9 304.8 304.0 340.4 273.3 349.7 6.3 239. 355-5HR 342.5 287.0 329. 324.9 35.7 362.9 283.8 372.8 67.5 254.9 365-5HR 354.7 304.4 340.8 344.7 326.9 384.9 293.9 395.5 73.5 270.4 435-5HR 49.6 339.9 403.2 384.8 386.8 429.8 347.7 44.5 205.2 30.9 460-5HR 443.9 366.3 426.5 44.8 409.2 463.3 367.8 475.9 27. 325.4 480-5HR 466.3 395.3 448.0 447.6 429.8 499.9 386.3 53.5 228. 35. 85S-5HR 85.2 70.3 82.5 80.5 79.7 90.8 77.0 0. 46.4 67.6 05S-5HR 02.5 85.7 99.2 98.3 95.9 0.8 92.6 23.3 55.8 82.5 35S-5HR 34.4 5.5 30. 32.3 25.7 49.2 2.4 66. 73.2. 65S-5HR 62. 36.6 56.8 56.6 5.6 76.5 46.4 96.5 88.3 3.4 75S-5HR 76.0 50.0 70.3 72.0 64.6 93.9 59.0 25.8 95.9 44.4 95-5HR 96.6 59.5 88.8 80. 8. 200.8 58.3 99.7 93. 36.7 25S-5HR 24.2 70.8 207.3 95.8 200.4 220.7 93.5 245.7 6.7 64.4 25-5HR 25.4 72.6 206.8 94.9 98.3 27.3 73.4 26. 02.0 48.0 240S-5HR 240.7 92.8 232.9 220.9 225.2 249. 27.4 277.2 3. 85.5 250-5HR 250. 200.7 240.2 226.7 230.3 252.7 20.4 25.3 8.4 72. 280-5HR 283.7 232. 272.5 262.2 26.3 292.2 228.5 290.7 34.4 99.0 30-5HR 30.8 258.6 298.5 292. 286.2 325.6 250.3 323.8 47.2 22.7 340-5HR 342.3 275.0 328.7 30.6 35. 346.2 275.6 344.3 62. 235.8 355-5HR 355.5 293. 34.4 33. 327.3 369.0 286.2 367.0 68.3 25.3 365-5HR 368. 30.9 353.5 35.2 338.9 39.4 296.4 389.3 74.3 266.6 435-5HR 435.5 347.2 48.2 392. 400.9 437. 350.6 434.7 206.2 297.7 460-5HR 460.7 374.2 442.4 422.7 424.2 47. 370.9 468.6 28. 320.8 480-5HR 483.9 403.8 464.7 456.0 445.6 508.3 389.6 505.6 229. 346.2 85S-5HR 88.4 7.7 85.5 82.0 82.6 92.3 79.7 02.6 46.7 66.6 05S-5HR 06.3 87.5 02.8 00. 99.3 2.6 95.8 25.2 56.2 8.2 35S-5HR 39.4 7.8 34.8 34.8 30.2 5.7 25.6 68.6 73.7 09.3 65S-5HR 68. 39.4 62.6 59.4 57.0 79.5 5.5 99.5 88.8 29.4 75S-5HR 82.5 53. 76.5 75. 70.5 97. 64.5 29. 96.4 42. 95-5HR 203.8 62.8 95.6 83.5 87.4 204. 59.6 96.7 93.5 34.8 25S-5HR 222. 74.3 24.8 99.4 207.5 224.4 200.2 249.4 7.4 6.8 25-5HR 223.2 76.2 24.2 98.6 205.3 220.9 74.7 22.9 02.4 45.9 240S-5HR 249.6 96.7 24.4 225.0 233.2 253.2 225.0 28.5 3.9 82.6 250-5HR 259.2 204.9 248.8 230.9 238.3 256.9 202.9 247.5 9.0 69.6 280-5HR 294. 237.0 282.3 267. 270.4 297. 230.2 286.3 35.0 96.2 30-5HR 322.2 264. 309.2 297.5 296.2 33.0 252.2 39.0 47.9 28.6 340-5HR 354.8 280.7 340.5 36.3 326.2 35.9 277.7 339. 62.8 232.4 355-5HR 368.4 299.3 353.6 337.2 338.8 375.2 288.4 36.5 69. 247.7 365-5HR 38.5 37.5 366.2 357.7 350.8 398.0 298.7 383.5 75. 262.8 435-5HR 45.4 354.5 433.2 399.4 45.0 444.3 353.3 428.2 207.2 293.4 460-5HR 477.5 382. 458.3 430.5 439. 478.9 373.8 46.5 29.2 36.3 480-5HR 50.6 42.2 48.4 464.5 46.2 56.8 392.7 498.0 230.2 34.2 ) Rating based on 0 F water range in evaporator and 0.000 fouling factor. 2) Interpolation between rating is permissible but extrapolation is NOT. 3) kw I is compressor input power. 4) Units are running part load above the Ambient Temperature 5 F due to the current limiter. - 9 -