NOMENCLATURE - Dunham-Bush Americas | Heating, Air …dunhambushla.com/pdf/MS0463B.pdf · ·...

Products that perform...By people who care

AFHX SeriesAir Cooled Screw Flooded Chillers

R134aR22R407c50Hz 60Hz

Cooling Capacity: 208 to 557 Tons (732 to 1959 kW)

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TABLE OF CONTENT PAGE NO Nomenclature .............................................................................................................................................. 2 Advantages of Flooded Chiller..................................................................................................................... 3 Unit Features ............................................................................................................................................... 5 Operating Benefits ....................................................................................................................................... 8 Typical Sequence of Operation ................................................................................................................... 9 Application Data .......................................................................................................................................... 10

Physical Specifications ............................................................................................................................... 11 Performance Data ....................................................................................................................................... 12 Dimensional Data ....................................................................................................................................... 13 Dimensional Clearance ............................................................................................................................... 16 Floor Loading Diagram ............................................................................................................................... 17 Condenser Fan ........................................................................................................................................... 18 Sound Pressure Level at 10M- Free Field .................................................................................................. 18

Pressure Drop ............................................................................................................................................. 19 Electrical Data ............................................................................................................................................. 19 Typical Wiring Schematic ........................................................................................................................... 20

NOMENCLATURE

A F HX 115 T - 5 S R - HR

Air Cooled Chiller

Flooded Evaporator

Nominal Tons

HR = Heat Recovery LN = Low Noise

5 = 50Hz 6 = 60Hz

S = Standard Q = Special

Horizontal Screw Compressor

T = Optional Two Compressors Blank = Standard

Blank = R22 R = R134a

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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 a mod-motor actuated ball valve which modulates the subcooled liquid refrigerant into the evaporator. This ensures 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:

1. Higher Capacity and Higher EER Achievable with the Same Compressor The flooded evaporator with all the copper tubes immersed in the “boiling” liquid refrigerant enables 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. On the contrary, for a DX or Direct Expansion Evaporator, the typical approach temperature is between 8°F to 10°F. This simply means that the same compressor in a flooded evaporator system will operate at a higher saturated evaporating temperature when compared to the same compressor in a DX-Evaporator system, when outlet chilled water temperatures in both cases are set at the same temperature. Figure 1 shows the typical screw compressor capacity performance curve at a particular condensing temperature over saturated evaporating temperature of between 30°F to 50°F, 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 generate approximately 8% more cooling capacity while kw input increases negligibly by about 1.8%. Therefore, the same compressor when coupled to a flooded evaporator will typically achieved higher cooling capacity performance with correspondingly higher Energy Efficiency Ratio (EER) i.e. (Btu/watt) or lower kw/Ton.

FIGURE 1

A DX evaporator uses TXV throttling to maintain about 10 to 15°F suction superheat to prevent liquid flood back to the compressor. In a flooded evaporator, the refrigerant boils off in the shell and gas can be sucked out from the top of evaporator back to compressor. The suction superheat is usually about 2 to 3°F. Reduction in suction superheat will further increase the capacity performance of the compressor.

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ADVANTAGES OF FLOODED CHILLER

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 the flooded design will impose less capacity penalty on the compressor and this will further enable the compressor in a flooded evaporator to generate more capacity than one with a DX Evaporator.

2. Better Part Load Performance

The Dunham-Bush Air Cooled Flooded Chiller with its sophisticated advanced controller and patented oil management system has all evaporator tubes 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. Thus not utilizing the full heat transfer surface areas of the evaporator tubes and therefore have a lower efficiency when compared with a flooded evaporator chiller at part-load conditions.

3. Excellent Capacity Modulation in

Response to Building Loads Dunham-Bush utilizes its state-of-the-art advanced controller in combination with the electronic level controller and mod-motor actuated ball valve to ensure instantaneous and precise feeding of liquid refrigerant to the flooded evaporator

in response to changes in building demand; and maintains precise (±1/2°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 do not function efficiently at low-load conditions and can encounter oil return problem!

4. Cleanable Evaporator For a single pass evaporator, the end plates at both ends of the water boxes (2 pass only at return 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.

5. 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 a higher-pressure drop as compared with the water flow in the tubes of a flooded evaporator. In other words, the equivalent flooded chiller will require smaller water pump to operate at lower power consumption.

6. Commonly Used In Large Tonnage Chillers Where Efficiency Is Critical As a general rule, 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!

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UNIT FEATURES

Vision2020i a flexible and advance programmable electronic controller designed specifically for the applications and precise control of Dunham-Bush Rotary Screw compressor chillers.

The controller board is provided with a set of terminals that connected to various devices such as temperature sensors, pressure and current transducers, solenoid valves, compressors and fans contactors, control relays and etc. Three sizes of controller boards are provided to handle different number of input and output requirements: DB3-S small board, DB3-M medium board 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.

Vision2020i 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 Vision2020i controller is design to work with a user friendly back-lit 132 by 64 pixels DBG1

Semi-Graphic Display panel connected with controller through telephone cable. The terminal allows carrying out all program operations. The user terminal allows displaying the unit working conditions, compressor run times, alarm history and modifying the parameters. The display also has an automatically self-test of the controller on system start-up. Multiple messages will be displayed by automatically scrolling from each message to the next. All of these messages are spelled out in English language on the display terminal.

There are 15 dedicated buttons enable user to access information, base on the security level of the password. For more detail operation of the DBG1 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 water temperatures and eliminate the need for often-inaccurate thermometers. Voltage 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 through either direct connection

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UNIT FEATURES of other Dunham-Bush control packages to the controller through either the RS485 long distance differential communications port, via terminal or modem connected to the RS232 communication port, or from an external Building Automation System supplying a simple 4 to 20mA signal. Remote reset of compressor current limit 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 insure 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 retains 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 may be used to take logs 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.

REFRIGERATING CYCLE The refrigerant management system, 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 compression begins.

This partially compressed gas is then joined by additional gas from the flash economizer as the rotors rotate past the vapor injection port at an intermediate pressure. 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.

The gaseous refrigerant is then drawn out of the flash economizer and into the vapor

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UNIT FEATURES

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. This 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 air cooled chillers have best part-load performance characteristics

in the industry when measured in accordance with ARI Standard 550/590-2003.

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 air cooled chillers combine the efficient operation of multiple compressors with an economizer cycle and advanced controller 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.

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OPERATING BENEFITS EFFICIENCY AND RELIABILITY

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 advanced controller staging producing greater capacity with fewer compressors.

Maximized performance through computer-matched components and multiple compressors on a single refrigerant circuit.

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.

Installation Ease

Dramatic payback in reduced maintenance and overhaul costs both in down time and in labor expenditures.

Ease of troubleshooting through controller retention of monitored functions.

Factory run tested.

Safety Code

ASME Boiler and Pressure Vessel Code, Section VIII Division 1 "Unfired Pressure Vessels".

JKKP Code.

ASME Standard B31.5 Refrigeration Piping.

ASHRAE Standard 15 Safety Code for Mechanical Refrigeration.

IEEE.

Refrigerant Compatibility

Designed to operate with environmentally safe and economically smart HFC-134a 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.

Insured uniform compressor loading and optimal energy efficiency through controller to controls 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 cost, 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.

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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 two-compressor units and is very similar for single, four-compressor units.

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 15 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 above setpoint.

All safety conditions satisfied.

After all above conditions are met, the controller will call for the lead compressor to start. The compressor 15-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, yielding 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 computer.

The computer 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 from setpoint), no load or unload commands are given. If chilled water temperature is above deadband, the computer will continue loading the compressor until a satisfactory rate of 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 compressor will start in the same manner as the first. Then both compressors will be commanded to adjust load to 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 80%. If applied load decreases further, the remaining compressor unloads proportionately. If applied load decreases to less than the minimum capacity of one compressor, the leaving chilled water temperature will decline to 2°F below setpoint, at which time the lead compressor will shut down. It will restart automatically if leaving chilled water temperature rises to 2°F above setpoint and both 15 minute anti-recycle and one minute start delay timers are satisfied.

During start-up operation, the computer monitors the difference between discharge and suction pressures to ensure that minimum of 30 psi differential is available for compressor lubrication. If the difference falls below a minimum of 30psi, the computer closes refrigerant flow control valves, starving the evaporator, causing evaporator pressure to drop, 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.

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APPLICATION DATA Low Ambient Operation / Freeze Protection If unit is required to operate below 20°F (-7°C), optional head pressure control is required. Though heater tape is provided on vessel, all water piping must also be protected by heater tape. 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. Tees in refrigerant lines with shut off valves can be supplied. Consult factory for further details. Water Circuit Constant water flow required with a minimum of 3 gallons per ton (3.3 liters / kWo) increasing up to 10 gallons (11 lifers) for process, low load applications with small temperature ranges and/or vastly fluctuating load conditions.

Glycol Freeze Protection If the chiller or fluid piping may be exposed to temperatures below freezing, glycol protection is recommended. The re-commended protection is 15°F (8.3°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 vessels and piping should be drained. If the equipment is being used for operating conditions below 42°F (5.5°C) with standard vessels or below 40°F (4.4°C) with optional 40°F (4.4°C) vessels, glycol should be used to prevent freeze damage. The freeze protection level should be 20°F (11°C) lower than the leaving brine temperature. The use of glycol causes a performance aerate as shown in ethylene glycol, propylene glycol and needs to be included in the unit selection procedure.

Ethylene Glycol

% E. G. By Weight

Freeze Point C1 Capacity Factor

K1 kW Rate

G1 Flow Factor

P1 P.D. Factor °F °C

10 26.2 -3.2 0.995 0.998 1.019 1.050 15 22.4 -5.3 0.991 0.997 1.030 1.083 20 17.8 -7.9 0.988 0.996 1.044 1.121 25 12.6 -10.8 0.984 0.995 1.060 1.170 30 6.7 -14.1 0.981 0.994 1.077 1.219 35 0.0 -17.8 0.977 0.992 1.097 1.275 40 -10.0 -23.3 0.973 0.991 1.116 1.331 45 -17.5 -27.5 0.968 0.990 1.138 1.398 50 -28.9 -33.8 0.964 0.989 1.161 1.466

Propylene Glycol

% E. G. By Weight

Freeze Point C2 Capacity Factor

K2 kW Rate

G2 Flow Factor

P2 P. D. Factor °F °C

10 26.1 -3.3 0.988 0.994 1.005 1.019 15 22.8 -5.1 0.984 0.992 1.008 1.031 20 19.1 -7.2 0.978 0.990 1.010 1.051 25 14.5 -9.7 0.970 0.988 1.015 1.081 30 8.9 -12.8 0.962 0.986 1.021 1.120

Correction Factor - Elevation

Elevation above Sea Level Capacity Correction

Factor

kW Correction

Factor Feet Meters Factor

0 0 1.00 1.00 2000 600 0.99 1.01 4000 1200 0.98 1.02 6000 1800 0.97 1.03

Correction Factor - FF Fouling Factor Capacity

Correction Factor

kW Correction

Factor hr-ft. - °F/BTU m² °C kw

0.00010 0.018 1.000 1.000 0.00025 0.044 0.990 0.995 0.00050 0.088 0.970 0.990

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PHYSICAL SPECIFICATIONS

MODEL AFHX 210-6SR 220-6SR 235-6SR 260-6SR 280-6SR 310-6SR

COMPRESSOR

MODEL (QTY) HX 1817 X 1 HX 1709 X 1 HX 1711 X 1

HX 1711 X 2 HX 1711 X 1 HX 1811 X 1

HX 1811 X 2 HX 1813 X 2

RPM 3550 3550 3550 3550 3550 3550

NOMINAL CAPACITY TR 208 220 235 257 280 309

MIN. % UNIT CAPACITY REDUCTION 25% 12.5% 12.5% 12.5% 12.5% 12.5%

EVAPORATOR

MODEL (QTY) L1R (1) D2R (2) J1R (2) J1R (2) K1R (2) K2R (2)

WATER CONNECTOR INCH[MM] 8[203] 8[203] 8[203] 8[203] 8[203] 8[203]

NOM. WATER FLOW / PD GPM / FT IN WG 499/ 14.67 529/ 7.2 565/ 9.63 618/ 11.16 673/ 11.25 743/ 11.53

MIN/ MAX WATER FLOW GPM 159/ 787 235/ 1174 236/ 1174 236/ 1174 257/ 1281 283/ 1409

MIN/ MAX WATER PD FT IN WG. 1.89/ 33.28 1.65/ 30.52 1.96/ 35.56 1.96/ 35.56 1.99/ 36.06 2.02/ 36.77

CONDENSER

COIL ROWS DEEP/ TOTAL FA (SQ.FT) 4/ 282.3 4/ 282.3 4/ 282.3 4/ 141.2, 3/ 188.2 3/ 376.4 4/ 188.2, 3/ 188.2

NO. OF FAN 12 12 12 14 16 16

FAN DIA. MM 800(12) 800(12) 800(12) 860(14) 860(16) 860(16)

MOTOR kWI (QTY) 2.0(12) 2.0(12) 2.0(12) 3.0(14) 3.0(16) 3.0(16)

FLA, AMP (QTY) 3.8(12) 3.8(12) 3.8(12) 4.9(14) 4.9(16) 4.9(16)

TOTAL CFM 157500 156177 153594 230034 265944 257460

MIN. AMBIENT TEMP. (F) AT MIN. LOAD 45 45 45 45 45 45

ELECTRICAL

NOM. VOLTAGE 460/3/60 460/3/60 460/3/60 460/3/60 460/3/60 460/3/60

UNT RLA A 341.3 366.5 394.5 449.8 488.5 508.3

UNIT MAX. INRUSH A 530.1 416.2 444.2 494.5 524.3 653.1

GENERAL

UNIT LENGTH INCH[MM] 276[7010] 276[7010] 276[7010] 318[8077] 360[9144] 381[9677]

UNIT WIDTH INCH[MM] 88[2235] 88[2235] 88[2235] 88[2235] 88[2235] 88[2235]

UNIT HEIGHT INCH[MM] 96.5[2451] 96.5[2451] 96.5[2451] 96.5[2451] 96.5[2451] 96.5[2451]

SHIPPING WEIGHT LBS[KG] 17199[7801] 18690[8478] 19596[8889] 21328[9674] 23645[10725] 25162[11413]

OPERATING WEIGHT LBS[KG] 17542[7957] 19107[8667] 20099[9117] 21831[9827] 24205[10979] 25768[11688]

OPERATING CHARGE R134a LBS[KG] 567[257] 600[272] 642[291] 703[319] 794[360] 877[398]

MODEL AFHX 355-6SR 405-6SR 435-6SR 460-6SR 515-6SR 555-6SR

COMPRESSOR

MODEL (QTY) HX 1813 X 1 HX 1816 X 1

HX 1816 X 2 HX 1817 X 2 HX 1813 X 3 HX 1816 X 1 HX 1813 X 2

HX 1816 X 2 HX 1813 X 1

RPM 3550 3550 3550 3550 3550 3550

NOMINAL CAPACITY TR 355 402 434 460 512 557

MIN. % UNIT CAPACITY REDUCTION 12.5% 12.5% 12.5% 8.33% 8.33% 8.33%

EVAPORATOR

MODEL (QTY) L2R (2) L3R (2) M1R (2) L2R (1), M2R (1) L3R (1), M2R (1) L3R (1), M3R (1)

WATER CONNECTOR INCH[MM] 10[254] 10[254] 12[305] 12[305] 12[305] 12[305]

NOM. WATER FLOW / PD GPM / FT IN WG 852/ 9.02 966/ 10.03 1042/ 9.17 1104/ 11.89 1231/ 14.45 1337/ 14.95

MIN/ MAX WATER FLOW GPM 365/ 1810 390/ 1948 436/ 2173 411/ 2040 423/ 2109 439/ 2184

MIN/ MAX WATER PD FT IN WG. 1.96/ 35.14 1.96/ 35.59 1.93/ 34.47 1.95/ 34.81 1.94/ 35.04 1.97/ 35.22

CONDENSER

COIL ROWS DEEP/ TOTAL FA (SQ.FT) 4/ 188.2, 3/ 235.3 4/ 235.3, 3/ 235.3 4/ 470.6 3/ 256.7, 4/ 385 4/ 641.7 4/ 641.7

NO. OF FAN 18 20 20 20 20 20

FAN DIA. MM 860(18) 860(20) 860(20) 860(20) 860(20) 860(20)

MOTOR kWI (QTY) 3.0(18) 3.0(20) 3.0(20) 3.0(20) 4.0(20) 4.0(20)

FLA, AMP (QTY) 4.9(18) 4.9(20) 4.9(20) 4.9(20) 6.5(20) 6.5(20)

TOTAL CFM 289863 316260 309225 347340 381612 373422

MIN. AMBIENT TEMP. (F) AT MIN. LOAD 45 45 45 45 45 45

ELECTRICAL

NOM. VOLTAGE 460/3/60 460/3/60 460/3/60 460/3/60 460/3/60 460/3/60

UNIT RLA A 585.4 655.8 695.7 755.4 827.8 896.9

UNIT MAX. INRUSH A 726.7 781.4 883.7 896 974.7 1023.6

GENERAL

UNIT LENGTH INCH[MM] 423[10744] 465[11811] 465[11811] 444[11278] 444[11278] 444[11278]

UNIT WIDTH INCH[MM] 88[2235] 88[2235] 88[2235] 88[2235] 88[2235] 88[2235]

UNIT HEIGHT INCH[MM] 96.5[2451] 96.5[2451] 96.5[2451] 120.5[3061] 120.5[3061] 120.5[3061]

SHIPPING WEIGHT LBS[KG] 27977[12690] 32270[14637] 33567[15226] 34716[15747] 36759[16673] 37994[17234]

OPERATING WEIGHT LBS[KG] 28749[13040] 33091[15010] 34492[15646] 35582[16140] 37648[17077] 38912[17651]

OPERATING CHARGE R134a LBS[KG] 1005[456] 1140[517] 1228[557] 1303[591] 1453[659] 1576[715]

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PERFORMANCE DATA

LWT °F

MODEL AFHX

AMBIENT TEMPERATURE, °F 85.0 95.0 105.0 115.0

TR kWO kWI TR kWO kWI TR kWO kWI TR kWO kWI

40.0

210-6SR 196.5 691.1 185.5 191.0 671.7 214.1 185.0 650.7 250.9 177.6 624.5 302.9 220-6SR 209.3 735.9 198.8 203.7 716.4 229.6 197.8 695.7 258.4 190.4 669.8 324.5 235-6SR 224.5 789.5 213.0 218.5 768.6 246.0 212.2 746.4 288.0 204.3 718.6 347.6 260-6SR 245.9 864.8 231.0 239.4 841.8 266.9 232.4 817.5 312.2 223.8 787.0 376.9 280-6SR 267.4 940.4 249.1 260.3 915.5 287.8 252.8 889.0 337.0 243.4 855.9 406.2 310-6SR 293.6 1032.4 267.5 285.8 1005.1 309.2 277.5 976.1 362.0 267.2 939.7 435.5 355-6SR 337.7 1187.7 307.1 328.7 1156.1 354.0 319.2 1122.7 414.9 307.3 1080.8 498.9 405-6SR 382.2 1344.1 346.3 372.1 1308.5 400.0 361.3 1270.7 468.4 347.8 1223.3 563.3 435-6SR 411.7 1447.9 372.6 400.8 1409.6 430.5 389.2 1368.8 504.0 374.7 1317.9 606.2 460-6SR 438.2 1541.2 402.1 426.5 1499.9 463.5 413.9 1455.8 543.9 398.3 1401.0 655.1 515-6SR 483.9 1701.7 441.0 471.0 1656.6 508.9 457.3 1608.4 595.6 440.3 1548.4 716.6 555-6SR 527.2 1854.2 481.4 513.1 1804.6 553.9 498.1 1751.7 650.0 479.3 1685.8 783.6

42.0


44.0


46.0


48.0


50.0


Notes: 1.) Ratings based on 10°F water range in evaporator and .0001 fouling factor. 2.) Interpolation between ratings is permissible but extrapolation is NOT. 3.) KWI is for compressor input. 4.) Unit is running on part load for ambient temperature 115°F and above due to current limiter.

- 13 -

DIMENSIONAL DATA

AFHX 210-6SR

AFHX 220-6SR, 235-6SR

AFHX 260-6SR NOTE : ALL DIMENSIONS ARE IN INCHES(MM).

- 14 -

DIMENSIONAL DATA

AFHX 280-6SR

AFHX 310-6SR

AFHX 355-6SR NOTE : ALL DIMENSIONS ARE IN INCHES(MM).

- 15 -

DIMENSIONAL DATA

AFHX 405-6SR, 435-6SR

AFHX 460-6SR, 515-6SR, 555-6SR NOTE : ALL DIMENSIONS ARE IN INCHES(MM).

- 16 -

DIMENSIONAL CLEARANCE SPACE REQUIREMENTS

Single Pit (See Note 2) Double Pit (See Note 2) Multi Pit Corner Wall

Notes: 1.) All dimensions are minimal, unless

otherwise noted. 2.) Pit installations are not re-

commended. Re-circulation of hot condenser air in combination with surface air turbulence cannot be predicted. Hot air re-circulation will severely affect unit efficiency (EER) and can cause high pressure or fan motor temperature trips. Dunham-Bush will not be responsible for ducting fans to a higher level to alleviate the above mentioned conditions.

- 17 -

FLOOR LOADING DIAGRAM 1.) AFHX 210-6SR, 220-6SR,

235-6SR, 260-6SR

2.) AFHX 280-6SR, 310-6SR

3.) AFHX 355-6SR, 405-6SR, 435-6SR, 460-6SR, 515-6SR, 555-6SR a.) POINT LOAD LOCATION – Inches [mm]

Unit Model AFHX A Dim. B Dim. C Dim. D Dim. E Dim. F Dim. G Dim. H Dim.

210-6SR 86 [2184] 21 [533] 117 [2972] 117 [2972] 21 [533] - - - 220-6SR 86 [2184] 21 [533] 117 [2972] 117 [2972] 21 [533] - - - 235-6SR 86 [2184] 21 [533] 117 [2972] 117 [2972] 21 [533] - - 260-6SR 86 [2184] 21 [533] 138 [3505] 138 [3505] 21 [533] - - - 280-6SR 86 [2184] 28 [711] 101 [2565] 102 [2591] 101 [2565] 28 [711] - - 310-6SR 86 [2184] 33 [839] 105 [2667] 105 [2667] 105 [2667] 33 [839] - - 355-6SR 86 [2184] 40 3/4 [1035] 68 1/4 [1734] 68 1/4 [1734] 68 1/2 [1740] 68 1/4 [1734] 68 1/4 [1734] 40 3/4 [1035] 405-6SR 86 [2184] 40 3/4 [1035] 76 1/2 [1943] 76 1/2 [1943] 77 1/2 [969] 76 1/2 [1943] 76 1/2 [1943] 40 3/4 [1035] 435-6SR 86 [2184] 40 3/4 [1035] 76 1/2 [1943] 76 1/2 [1943] 77 1/2 [1969] 76 1/2 [1943] 76 1/2 [1943] 40 3/4 [1035] 460-6SR 86 [2184] 40 3/4 [1035] 72 1/2 [1842] 72 1/2 [1842] 72 1/2 [1842] 72 1/2 [1842] 72 1/2 [1842] 40 3/4 [1035] 515-6SR 86 [2184] 40 3/4 [1035] 72 1/2 [1842] 72 1/2 [1842] 72 1/2 [1842] 72 1/2 [1842] 72 1/2 [1842] 40 3/4 [1035] 555-6SR 86 [2184] 43 1/4 [1098] 74 [1880] 74 [1880] 74 [1880] 74 [1880] 74 [1880] 43 1/2 [1098]

b.) POINT LOAD DATA – lbs [kg]

Unit Model AFHX

Pos. #1

Pos. #2

Pos. #3

Pos. #4

Pos. #5

Pos. #6

Pos. #7

Pos. #8

Pos. #9

Pos. #10

Pos. #11

Pos. #12

Total Operating

Weight

210-6SR 2414 [1095]

2652 [1203]

2890 [1311]

3067 [1391]

3195 [1449]

3323 [1507] - - - - - - 17542

[7957]

220-6SR 3092 [1403]

3179 [1442]

3265 [1481]

3258 [1478]

3190 [1447]

3123 [1417] - - - - 19107

8667

235-6SR 3272 [1484]

3330 [1511]

3389 [1537]

3428 [1555]

3370 [1529]

3311 [1502] - - - - - - 20099

[9117]

260-6SR 3733 [1694]

3667 [1663]

3600 [1633]

3506 [1591]

3610 [1638]

3714 [1685] - - - - - - 21831

[9903]

280-6SR 3272 [1484]

3098 [1405]

2924 [1326]

2749 [1247]

2779 [1261]

2953 [1340]

3128 [1419]

3302 [1498]

- - - - 24205 [10979]

310-6SR 3412 [1548]

3275 [1486]

3137 [1423]

3000 [1361]

3030 [1374]

3167 [1437]

3304 [1499]

3442 [1561]

- - - - 25768 [11688]

355-6SR 2437 [1105]

2393 [1086]

2350 [1066]

2307 [1046]

3364 [1027]

2220 [1007]

2234 [1013]

2326 [1055]

2417 [1096]

2509 [1138]

2600 [1179]

2692 [1221]

28749 [13040]

405-6SR 2810 [1275]

2781 [1262]

2752 [1249]

2723 [1235]

2694 [1222]

2665 [1209]

2705 [1227]

2734 [1240]

2763 [1253]

2792 [1266]

2821 [1280]

2850 [1293]

33091 [15010]

435-6SR 2974 [1349]

2926 [1327]

2878 [1306]

2831 [1284]

2783 [1262]

2735 [1241]

2745 [1259]

2823 [1280]

2870 [1302]

2918 [1324]

2966 [1345]

3013 [1367]

34492 [15646]

460-6SR 2937 [1332]

2938 [1333]

2939 [1333]

2940 [1334]

2941 [1334]

2942 [1335]

2999 [1360]

2996 [1359]

2992 [1357]

2989 [1356]

2986 [1354]

2983 [1353]

35582 [16140]

515-6SR 2984 [1354]

3035 [1377]

3086 [1400]

3137 [1423]

3188 [1446]

3240 [1470]

3296 [1495]

3243 [1471]

3190 [1447]

3136 [1423]

3083 [1398]

3030 [1374]

37648 [17077]

555-6SR 3368 [1528]

3308 [1500]

3247 [1473]

3187 [1446]

3126 [1418]

3066 [1391]

3122 [1416]

3181 [1443]

3239 [1469]

3297 [1496]

3356 [1522]

3414 1549]

38912 [17651]

- 18 -

CONDENSER FAN FAN POSITION NUMBER & CYCLING SEQUENCE

AFHX 210-6SR

AFHX 220-6SR, 235-6SR

AFHX 260-6SR

BASE FANS 2, 4, 6, 8, 10, 12 SYSTEM 1 SYSTEM 2 SYSTEM 1 SYSTEM 2

STAGE 1 1, 5 BASE FANS 8, 10, 12 2, 4, 6 BASE FANS 8, 10, 12, 14 2, 4, 6

STAGE 2 3, 7 STAGE 1 7, 11 1, 5 STAGE 1 7, 11 1, 5

STAGE 3 9, 11 STAGE 2 9 3 STAGE 2 9, 13 3

AFHX 280-6SR, 310-6SR

AFHX 355-6SR

SYSTEM 1 SYSTEM 2

SYSTEM1 SYSTEM 2 BASE FANS 10, 12, 14, 16, 18 2, 4, 6, 8

BASE FANS 10, 12, 14, 16 2, 4, 6, 8 STAGE 1 9, 13 1, 5

STAGE 1 9, 13 1,5 STAGE 2 11, 15 3, 7

STAGE 2 11, 15 3, 7 STAGE 3 17 -

AFHX 405-6SR, 435-6SR

AFHX 460-6SR, 515-6SR, 555-6SR

SYSTEM 1 SYSTEM 2 SYSTEM 1 SYSTEM 2

BASE FANS 12, 14, 16, 18, 20 2, 4, 6, 8, 10 BASE FANS 10, 12, 14, 16, 18, 20 2, 4, 6, 8

STAGE 1 11, 15 1, 5 STAGE 1 9, 13 1, 5

STAGE 2 13, 17 3, 7 STAGE 2 15, 19 3, 7

STAGE 3 19 9 STAGE 3 11, 17 -

SOUND PRESSURE LEVEL AT 10M-Free Field

SPL dBA

Model

BAND (Hz)

63 125 250 500 1K 2K 4K 8K TOTAL NC

AFHX 210-6SR 51 50 55 56 64 61 56 47 67 65

AFHX 220-6SR 51 50 55 56 64 61 56 47 67 65

AFHX 235-6SR 51 50 55 56 63 61 56 47 67 65

AFHX 260-6SR 52 51 57 58 65 62 57 49 68 65

AFHX 280-6SR 53 51 57 59 65 63 58 49 69 65

AFHX 310-6SR 53 52 58 59 66 63 58 50 69 65

AFHX 355-6SR 53 52 58 59 66 63 58 50 69 65

AFHX 405-6SR 53 52 58 60 66 64 59 51 70 65

AFHX 435-6SR 54 52 59 60 67 64 59 51 70 65

AFHX 460-6SR 55 53 59 60 67 64 59 50 70 65

AFHX 515-6SR 55 53 60 61 68 65 60 52 71 70

AFHX 555-6SR 55 54 60 61 68 65 60 52 71 70

NOTE: PUBLISHED SOUND VALUE AS ABOVE ARE WITH ±2dB TOLERANCE.

- 19 -

1

10

100

100 1000 10000

WATER FLOW RATE - GPM

PRES

SURE

DR

OP

- FT

IN W

GPRESSURE DROP

ELECTRICAL DATA

AFHX MODEL

COMPRESSOR DATA COND. FAN MOTOR DATA UNIT ELECTRICAL DATA

MODEL QTY RLA LRA QTY HP FLA FLA MCA MFS

210-6SR HX1817 1 296 1635 12 2 4.3 348 422 700

220-6SR HX1709 HX1711

1 1

149 172

730 845

6 6

2 2

4.3 4.3 373 416 500

235-6SR HX1711 HX1711

1 1

177 172

845 845

6 6

2 2

4.3 4.3 401 445 600

260-6SR HX1711 HX1811

1 1

177 205

845 915

6 8

3 3

5.5 5.5 459 510 700

280-6SR HX1811 HX1811

1 1

206 205

915 915

8 8

3 3

5.5 5.5 499 551 700

310-6SR HX1813 HX1813

1 1

217 213

1400 1400

8 8

3 3

5.5 5.5 518 572 700

355-6SR HX1813 HX1816

1 1

217 281

1400 1495

8 10

3 3

5.5 5.5 597 667 800

405-6SR HX1816 HX1816

1 1

277 281

1495 1495

10 10

3 3

5.5 5.5 668 738 1000

435-6SR HX1817 HX1817

1 1

301 297

1635 1635

10 10

3 3

5.5 5.5 708 783 1000

460-6SR HX1813 HX1813

1 2

217 220

1400 1400

8 12

3 3

5.5 5.5 767 822 1000

515-6SR HX1816 HX1813

1 2

276 211

1495 1400

8 12

4 4

7.1 7.1 840 909 1000

555-6SR HX1816 HX1816 HX1813

1 1 1

276 277 214

1495 1495 1400

8 12

4 4

7.1 7.1 909 978 1200

Note: MCA - Minimum Circuit Ampacity MFS - Maximum Fuse Size RLA - Running Load Amps FLA – Full Load Amps LRA - Locked Rotor Amps

AFHX 210-6SRAFHX 235-6SRAFHX 260-6SRAFHX 220-6SRAFHX 280-6SRAFHX 310-6SRAFHX 355-6SRAFHX 405-6SRAFHX 460-6SRAFHX 515-6SRAFHX 555-6SR

AFHX 435-6SR

- 20 -

TYPICAL WIRING SCHEMATIC TWO COMPRESSORS UNIT

- 21 -

TYPICAL WIRING SCHEMATIC

- 22 -

Ω

Ω


- 23 -


M-S-0463B-1209Manufacturer reserves the right to change specifications without prior notice.

[email protected]

Americas

United States of AmericaDunham-Bush, Inc175 South Street, West Hartford,CT 06110, USA

Tel: 1-860-956 8500Fax: 1-860-953 3300

Africa

South AfricaDunham-Bush International(Africa) (Pty) LtdNo. 57 Sovereign DriveRoute 21 Corporate ParkIrene, PretoriaSouth Africa

Tel: 27-12-345 4202Fax: 27-12-345 4203

Europe

United KingdomDunham-Bush Limited8 Downley Road,Havant, Hampshire,England PO9 2JD

Tel : 44-23-9247 7700Fax: 44-23-9245 0396

India

Dunham Bush International (India) Pvt Ltd.Level 6, Pentagon P-2,Magarpatta CityHadapsar,Pune 411013, India Tel: 91-20-4014 7522Fax: 91-20-6628 0011

Russia & CIS

RussiaDunham-Bush ClimateEquipment LLCLot 11, Novinskiy Boulevard,Moscow,121099 Russian Federation

Tel: 7-499-255 6953Fax: 7-499-255 6953

Malaysia

Dunham-Bush Industries Sdn BhdLot 5755-6, Kidamai Industrial Park,Bukit Angkat,43000 Kajang,Selangor Darul Ehsan,Malaysia

Tel: 603-8733 9898Fax: 603-8739 5020

China

The People's Republic of ChinaDunhan-Bush Yantai Co.,LtdNo. 1 Dunham-Bush Road,Laishan District, Yantai,Shandong Province,China 264003

Tel: 86-535-658 8999Fax: 86-535-658 1999

Middle East & North Africa

United Arab EmiratesDunham-Bush LLCPlatinum Business CentreOffice No. 704AL Nahda 2nd StreetP. O. Box 30922, Dubai, UAE

Tel: 971-4-261 7423Fax: 971-4-261 7424

Asia

SingaporeDunham-Bush InternationalPte Ltd146B, Paya Lebar Road,No. 05-01, ACE Building,Singapore 409017

Tel: 65-6842 2012Fax: 65-6842 2013

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