Dunham-Bush WCFX-E Series User manual

50Hz
R22 R407C
50Hz
60Hz
Products that perform...By people who care
WCFX-E Series 60Hz
Water Cooled Rotary Screw Water Chillers
Cooling Capacity: 70 to 1000 TR (246 to 3517 kW)
R134a

- 2 -
INTRODUCTION
The Dunham-Bush WCFX-E Water Cooled Rotary Screw Flooded Chillers are available from 70 to
1000 TR [246 to 3517 kW]. These units are supplied with rotary screw compressors that are
backed by more than 40 years of experience. In fact, a one-year parts warranty is provided on the
entire unit at no extra cost.
All units are factory run tested before shipment.
TABLE OF CONTENTS
Page
Introduction ..................................................................................................................................................................................................2
Nomenclature................................................................................................................................................................................................2
Components..................................................................................................................................................................................................3
Standard Features .......................................................................................................................................................................................3
Unit Features.................................................................................................................................................................................................4
Operating Benefits .......................................................................................................................................................................................9
Typical Sequence of Operation ..................................................................................................................................................................10
Physical Specifications................................................................................................................................................................................11
Dimensional Data .......................................................................................................................................................................................13
Floor Loading Diagram................................................................................................................................................................................19
Water Pressure Drop ..................................................................................................................................................................................20
Sound Pressure Data..................................................................................................................................................................................26
Electrical Data.............................................................................................................................................................................................26
Typical Wiring Schematic............................................................................................................................................................................27
Application Data..........................................................................................................................................................................................32
Equipment...................................................................................................................................................................................................34
Guide Specifications ..................................................................................................................................................................................34
NOMENCLATURE
WC F X E 10 S AR C3R B4R Q
Condenser Code
Water-Cooled Chiller
Flooded Evaporator
Screw Compressor
Model Electrical Code
AN - 208-230V/3PH/60HZ
AR - 460V/3PH/60HZ
AS - 575V/3PH/60HZ
CB - 380V/3PH/60HZ
Evaporator Code
S = Single Compressor
T = Two Compressors
Blank= Three Compressors
Generation
WCFX-E
Blank – Options Within The
Scope of SPEC
Q - Options Outside The
Scope of SPEC

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COMPONENTS
STANDARD FEATURES
Size/Range
D37 Models from 70 to 1000 TR [246 to 3517 kW].
DMultiple compressor units provide redundancy, and
favorable part load efficiency.
DOne-year parts warranty at no extra cost.
Compressor(s)
DImproved, quiet, reliable MSC Vertical Rotary Screw
Compressors with up to 2 integral oil separators.
DOptimized for R134a and optimized volume ratio for
best efficiency.
DUL listed.
DImproved rpm and noise level.
DOptimized rotor drive.
DImproved rotor and anti-reverse rotation bearing
design.
DOptimized VI port position and geometry.
DMultiple rotary screw compressors design for better
reliability and redundancy.
DWelded hermetic design with no requirement for
internal parts service, no periodic compressor tear
down and overhaul, and eliminates casing leakages.
DConsistent loading and unloading with dependable
slide valve mechanism.
DNo external oil pump required.
DDouble-delta motor winding with 1/3 lock-rotor amps at
start-up. Star-delta motor winding for MSC 226 mm
series.
DFaulty 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.
DVapor injection cycle to increase capacity and improve
efficiency.
Evaporator/Condenser
DCleanable and Removable Integral Fin Copper Tubes.
DOne, Two or Three Water Passes Available.
DRemovable Water Heads.
DVictaulic Groove Water Connections.
DVessel designed according to ASME Code, approved
and certified by JKKP.
DRelief Valves(s) standard - 3/4" FPT or 1” PPT.
DFull Pump Down Capacity in Condenser.
Controller/ Electrical
DProactive Advanced Controller adapts to abnormal
operating conditions.
DTolerant and accommodating of extreme conditions at
start-up.
DCapable of controlling multiple chillers, cooling towers,
pumps, etc.
DCircuit Breaker on each multiple compressor unit.
DUnit Mounted Contactor and Time Delay for reduced
Inrush Start.
DCurrent and Voltage transformers.
DUnder Voltage Phase Failure Relay.
DIndicator lights for Compressor Overloads, Micro
Alarm, Control Power, Compressor Control Circuit.
Heat exchangers with
cleanable and removable
enhanced copper tubes
Compact, quiet MSC
Compressors
Controller for precise
and reliable control
Vessels designed according
to ASME code
Bolted construction
for easy knockdown
Economizer to
enhance performance

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DISCHARGE OIL DEFLECTOR
CAP
OIL STRAINER
MALE
(
DRIVE
)
SUCTION
SUCTION
CHECK VALVE
MOTOR
1
ST
OIL SEPARATOR
REPLACEABLE
SUCTION FILTER
2
ND
OIL SEPARATOR
UNIT FEATURES
Compressor Assembly
The Dunham-Bush rotary screw compressor is a positive
displacement helical-axial design for use with high-
pressure refrigerants.
DThe compressor consists of two intermeshing helical
grooved rotors, a female drive rotor and a male driven
rotor, in a stationary housing with suction and
discharge gas ports.
DUniform 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.
DNo 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 an outstanding feature:
DThe moving parts are simple, rugged and trouble-free.
The slide mechanism is hydraulically actuated.
DPackage capacity reduction can be down to as low as
8.5% without HGBP by progressive movement of slide
valves away from their stops.
DCapacity reduction is programmed by an exclusive
electronically initiated, hydraulically actuated control
arrangement.
Positive Displacement Direct Connected
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
separator/impingement plate located below the discharge
gas port.
DThe separator is a multi-layered mesh element which
effectively separates oil from the gas stream.
DThe oil drains into the sump and the discharge gas
passes around the deflection plate. An oil drain valve
is located near the bottom of the oil sump.
Oil is also returned to the compressor after it is separated
from the refrigerant at the oil separator located at the
discharge of the compressor.
Main Bearings
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, in house.
Castings
All housings are manufactured of high grade, low porosity
and 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.

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UNIT FEATURES
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.
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.
FIG. A FIG. B FIG. C FIG. D

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UNIT FEATURES
ADVANCED CONTROLLER
Vision 2020i a flexible and advance programmable
electronic controller designed specifically for the
applications and precise control of Dunham-Bush Rotary
Screw compressor chillers.
The controller 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 are provided to handle
different number of input and output requirements: DB5-S
small board, DB5-M medium board and DB5-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 7” diagonal TFT 800 x 480 WVGA color
touch screen led back light graphical display, and
dedicated touch 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
Vision 2020i controller is design to work with a user
friendly DBG5 7” graphical colour touch screen display
panel which connected with controller through shielded
twisted pair 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 touch keys enable user to access information,
base on the security level of the password. For more
detail operation of the Display Terminal, please refer to
the Unit Operation Manual.
Easily accessible measurements include:
DLeaving chilled water temperature
DLeaving chiller water temperature derivative
DEvaporator Pressure
DCondenser Pressure
DCompressor amp draw of each compressor
DCompressor elapsed run time of each compressor
DCompressor starts status
DOil level sensor status
DWater temperature reset value
DWater flow switch status
DExternal start/stop command status
DTrend graph for leaving chilled water temperature
Optional entering chilled water temperature, leaving and
entering condenser water temperature are available. With
this option the operator can quickly and accurately read
all significant water temperatures and eliminate the need
for often-inaccurate thermometers. Voltage readout 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 of other Dunham-Bush control
packages to the controller through either the RS485 long
distance differential communications 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:
DLow suction pressure
DHigh discharge pressure
DFreeze protection
DLow differential pressure
DLow oil level
DCompressor run error
DPower loss
DChilled water flow loss
DSensor error
DCompressor over current
DCompressor Anti-recycle
The controller can retains up to 99 alarm conditions
complete with time of failure together data stamping on
critical sensor readings in alarm history screens. This tool
will aid service technicians in troubleshooting tasks
enabling downtime and nuisance trip-outs to be
minimized.

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UNIT FEATURES
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 open
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. Now owners of multiple buildings have a
simple and inexpensive method of investigating potential
problems quickly and in a highly cost effective manner.
REFRIGERATION CYCLE
Dunham-Bush Water Cooled Screw Flooded 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
easily. 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 joined with
additional gas from the 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 resumed to the oil
sump.
Fully compressed and superheated refrigerant is then
discharged into the condenser, where water in the
condenser tubes cools and condenses the refrigerant. A
portion of liquid refrigerant is tapped passes through the
first expansion device and into the economizer for further
subcooling of main liquid refrigerant flow.
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.
This delivers outstanding efficiency and total energy
savings through the utilization of economizer cycle.
Increases capacity by as much as 12% with only 7%
extra absorbed power.

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UNIT FEATURES
PART LOAD PERFORMANCE
Through the use of economizer and multiple compressors,
Dunham-Bush Water Cooled Screw Flooded Chillers
some of the best part-load performance characteristics in
the industry when measured in accordance with AHRI
Standard 550/590-2011.
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 Water Chillers combine the
efficient operation of multiple rotary screw compressors
with economizer and controller control to yield the best
total energy efficiency and significant operating savings
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.
The Air Conditioning and Refrigeration Institute (AHRI)
has established a system, in AHRI Standard 550/590-
2011, for measuring total chiller performance over full and
part-load conditions. It defines the Integrated Part-Load
Value (IPLV) as an excellent method of comparing diverse
types of equipment on an equal basis. The IPLV is a
single number estimate of a chiller's power use weighted
for the number of hours the unit might spend at each part-
load point. IPLV's are based on Standard Rating
Conditions.
The formula for calculating an IPLV is:
IPLV =
where: A= kW/ton at 100% load point
B= kW/ton at 75% load point
C= kW/ton at 50% load point
D= kW/ton at 25% load point
GLYCOL FREEZE PROTECTION
If the chiller or fluid piping may be exposed to
temperatures below freezing, glycol protection is
recommended if the water is not drained. The
recommended protection is 15°F below the minimum
ambient temperature in the equipment room and around
piping. Use only glycol solutions approved for heat
exchanger duty. DO NOT use automotive anti-freezing.
If the equipment is being used for applications below
38°F, glycol should be used to prevent freeze damage.
The freeze protection level should be 15°F lower than the
leaving brine temperature.
Table 1 and 2 are to be used to calculate performance
and power input with the addition of glycol. Table 3 and 4
are to be used to calculate performance and power input
with different fouling factor.
Table 1 : 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
Table 2 : Propylene Glycol
% P. 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
Table 3 : Evaporator Fouling Factor
Fouling Factor Capacity
Correction
Factor
kW
Correction
Factor
hr.ft².°F/BTU m².°C/kW
0.00010 0.018 1.000 1.000
0.00025 0.044 0.995 0.998
0.00050 0.088 0.985 0.995
0.00075 0.132 0.975 0.991
0.00100 0.176 0.964 0.987
Table 4 : Condenser Fouling Factor
Fouling Factor Capacity
Correction
Factor
kW
Correction
Factor
hr.ft².°F/BTU m².°C/kW
0.00025 0.044 1.000 1.000
0.00050 0.088 0.998 1.007
0.00075 0.132 0.996 1.010
0.00100 0.176 0.995 1.014
1
0.01 + 0.42 + 0.45 + 0.12
A B C D

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OPERATING BENEFITS
EFFICIENCY & RELIABILITY
Compressor Experience
DMore than 40 years of rotary screw experience and
dedicated technological advancements. Compressors
are UL listed.
DSimply designed for high reliability with only two
rotating parts. No gears to fail.
DInsured continuous oil flow to each compressor
through integral high efficiency oil separation for each
compressor.
DChillers use multiple rotary screw compressors for fail-
safe reliability and redundancy.
Energy Efficiency
DDesigned to provide the greatest amount of cooling for
the least kilowatt input over the entire operating range
of your building.
DDelivers outstanding efficiency and total energy
savings through the utilization of economizer and
controller controlled staging producing greater
capacity with fewer compressors.
DMaximized performance through computer matched
components and multiple compressors on a single
refrigerant circuit.
DHigh 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
DSide-by-side evaporator/condenser plus snug
arrangement of rotary screw compressors result in an
extremely compact work envelope.
DUnits feature optional split design to allow easy fit
through any standard commercial doorway.
DDramatic payback in reduced maintenance and
overhaul costs both in down time and in labor
expenditures.
DEase of troubleshooting through controller retention of
monitored functions.
DFactory run tested.
Safety Code Compliance:
DASME Boiler and Pressure Vessel Code, Section VlIl
Division 1 "Unfired Pressure Vessels"
DJKKP code
DASME Standard B31.5 Refrigeration Piping
DASHRAE Standard 15 Safety Code for Mechanical
Refrigeration
DNational Electric Code
DIEEE
DOptional PED
Refrigerant Compatibility
DDesigned to operate with environmentally safe and
economically smart HFC-134a with proven efficiency
and reliability.
DConsult factory for use with new HFC refrigerants.
Control Flexibility
DController-based with DDC (direct digital control)
features precise 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.
DInsured uniform compressor loading and optimal
energy efficiency through controller controls which
utilize pressure transducers to measure evaporator
and condenser pressure.
DLower energy costs resulting from automatic load
monitoring and increased accuracy and efficiency in
compressor staging.
DProactive 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.
Computer Performance Ratings
Dunham-Bush WCFX-E Water Cooled Screw Flooded
Chillers are available from 70 to 1000 TR [246 to 3517
kW]. The vast number of combinations of heat
exchangers, compressors and motors make it impractical
to publish tabular ratings for each combination. A chiller
may be custom matched to certain building requirements
by your Dunham-Bush Sales Representatives utilizing the
WCFX-E Computer Selection Program. Data which can
be provided to you will include:
DChiller Capacity
DkW Input
DEvaporator and Condenser Water
DPressure Drop
DEvaporator and Condenser Tube Water Velocities
DMotor Electrical Data
DPart-Load Performance
Contact our local Dunham-Bush Sales Representative to
discuss what Custom Solutions Dunham-Bush can offer
to solve your chiller selection questions.

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TYPICAL SEQUENCE OF OPERATION
The Dunham-Bush Water Cooled Screw Flooded Chiller
depends mainly on its on-board controller for control.
Operation described is for a two- compressor unit and is
very similar for single or three-compressor units.
For initial start-up, the following conditions must be met:
DPower supply to unit energized
DCompressor circuit breakers in the "on" position
DControl power switch on for at least 15 minutes.
DCompressor switches on
DCritical alarm is cleared at display panel
DChilled water pump running and chilled water flow
switch made
DLeaving chilled water temperature at least 2°F above
setpoint
DAll safety conditions satisfied
After all above conditions are met, the controller will call
for the lead compressor and the condenser water pump
to start. After a one-minute delay, the first contactor (e.g.
1 M-1) is energized followed by the second contactor
(e.g. 1 M-2) after one second time delay. This provides
reduced inrush stepped start.
The compressor 15-minute anti-recycle timer is initiated
at compressor start.
The controller monitors compressor amps, volts, leaving
water temperature, and evaporator and condenser
pressures. The compressor 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
controller gives it load signals, capacity gradually
increases. The rate of compressor loading is governed by
ramp control which is adjustable in the computer.
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 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 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
controller 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 decline to 2°F below setpoint, at
which time the lead compressor will shut down. It will
restart automatically if leaving chilled water temp rises to
2°F above setpoint and both 15 minute anti-recycle and
one minute start delay timers are satisfied.
During operation, the controller monitors the difference
between condenser and evaporator pressures to insure
that a minimum of 30 psi differential is available for
compressor lubrication. If the difference falls below a
minimum of 30 psi, the controller 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 cold condensing water 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.

- 11 -
PHYSICAL SPECIFICATIONS
Model WCFX-E 10S 12S 15S 19S* 20S* 20T* 22T* 23S* 24S* 24T*
Cooling Capacity TR 71.1 89.1 108.1 133.0 164.1 142.3 160.3 186.5 202.1 177.6 kW 250.1 313.4 380.2 467.8 577.1 500.5 563.8 655.9 710.8 624.6
104kcal/h 21.5 26.9 32.7 40.2 49.6 43.0 48.5 56.4 61.1 53.7
Min % Unit Capacity 25% 25% 25% 25% 25% 12.5% 12.5% 25% 25% 12.5%
Power 460/3P/60Hz
Compressor
Model (Qty) 1210(1) 1212(1) 1215(1) 1210(1) 1222(1) 1210(2) 1210(1)/
1212(1) 1222(1) 1227(1) 1212 (2)
Power Input kW 44 53 63 77 96 89.3 97.5 105 115 108
RLA, Each 78 104 129 126 154 78.0(2) 78.0/104.0 154 193 104.0(2)
LRA, Each 425 588 644 612 749 424.5(2) 424.5/588.0 749 923 588.0(2)
Evaporator
Model C3R D2R E2R FAR EAR EAR JAR JAR JBR JBR
Connection Size inches[mm] 5[127] 6[152] 6[152] 8[203] 6[152] 6[152] 8[203] 8[203] 8[203] 8[203]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 170.6[38.8] 213.8[48.6] 259.4[59.0] 320.0[72.7] 393.8[89.5] 342.8[77.9] 386.7[87.9] 447.6[101.7] 485.0[110.2] 427.6[97.2]
Evap. Pressure Drop psig[kPa] 1.6[11.0] 1.7[11.7] 1.6[11.0] 2.0[13.8] 4.1[30.3] 3.3[22.8] 3.9[26.9] 4.2[28.9] 4.4[30.3] 3.7[25.5]
Condenser
Model B4R B5R C2R D2R 5BR 5BR 5BR 5BR 5CR 5CR
Connection Size inches[mm] 5[127] 5[127] 6[152] 6[152] 6[152] 6[152] 6[152] 6[152] 6[152] 6[152]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 213.3[48.5] 267.3[60.8] 324.3[73.7] 368.7[83.8] 492.3[111.9] 401.4[91.2] 457.8[104.0] 559.5[127.1] 606.3[137.8] 498.3[113.3]
Cond. Pressure Drop psig[kPa] 2.0[13.8] 2.2[15.2] 2.3[15.8] 2.5[17.2] 4.0[27.5] 3.4[23.4] 4.3[29.6] 4.9[33.8] 4.4[30.3] 3.9[26.9]
Dimensions
Length inches[mm]
124 1/4
[3157] 124 1/4 [3157] 124 1/2 [3162] 132 3/16 [3358] 164 3/16 [4171] 152 3/16 [3866] 152 3/16 [3866] 164 3/16 [4171] 164 3/16 [4171] 152 3/16 [3866]
Width inches[mm]
42 3/16
[1072] 45 3/16 [1148] 50 5/8 [1286] 70 [1778] 70 [1778] 52 3/8 [1330] 53 11/16 [1364] 70 [1778] 70 [1778] 53 11/16 [1364]
Height inches[mm]
72 15/16
[1852] 72 15/16 [1852] 83 1/4 [2115] 71 1/4 [1810] 67 15/16 [1725] 78 7/8 [2003] 80 7/8 [2054] 70 3/16 [1783] 70 3/16 [1783] 80 7/8 [2054]
General Information
Shipping Weight lbs[kg] 4475[2030] 4696[2130] 5170[2345] 8576[3890] 10497[4761] 7981[3620] 8862[4020] 10915[4951] 11326[5137] 9669[4387]
Operating Weight lbs[kg] 4805[2180] 4805[2180] 5622[2550] 9370[4250] 11173[5068] 8929[4050] 9700[4400] 11631[5276] 12118[5497] 10465[4747]
Approx. Refrig. Charge R134a lbs[kg] 254[115] 320[145] 364[165] 419[190] 529[240] 529[240] 558[253] 558[253] 584[265] 584[265]
Model WCFX-E 27S* 27T* 30S* 30T* 36S 38T* 40T* 41S 46T*
Cooling Capacity TR 220.8 197.0 248.6 213.5 292.4 270.5 330.4 332.2 375.5 kW 776.6 692.8 874.3 750.9 1028.4 951.3 1162.0 1168.3 1320.6
104kcal/h 66.8 59.6 75.2 64.6 88.4 81.8 99.9 100.5 113.6
Min % Unit Capacity 25% 12.5% 25% 12.5% 25% 12.5% 12.5% 25% 12.5%
Power 460/3P/60Hz
Compressor
Model (Qty) 1227(1) 1212(1)/
1215(1) 1230(1) 1215(2) 2233(1) 1220(2) 1222(2) 2236(1) 1222(2)
Power Input kW 124 115.9 143 127.4 162 151.5 185.7 184 207
RLA, Each 193 104.0/129.0 224 129.0(2) 259 126.0(2) 154.0(2) 309 154(2)
LRA, Each 923 588.0/643.5 1019 643.5(2) 1380 612.4(2) 748.5(2) 1821 749(2)
Evaporator
Model 6DR 6DR 6ER 6ER 7CR 6CR 8BR 7BR 8DR
Connection Size inches[mm] 8[203] 8[203] 8[203] 8[203] 8[203] 8[203] 10[254] 10[254] 10[254]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 529.9[120.4] 474.0[107.7] 596.6[135.6] 513.6[116.7] 701.8[159.5] 655.2[148.9] 798.8[181.5] 797.3[181.2] 901.2[204.8]
Evap. Press. Drop psig[kPa] 3.8[26.2] 3.2[22.1] 4.3[29.3] 3.4[23.4] 4.6[31.7] 5.1[35.2] 4.7[32.4] 4.7[32.4] 5[34.5]
Condenser
Model 6CR 6CR 1KR 1KR RAR K5R M3R M1R M5R
Connection Size inches[mm] 6[152] 6[152] 8[203] 8[203] 8[203] 8[203] 10[254] 10[254] 10[254]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 662.4[150.6] 547.0[124.3] 745.8[168.5] 596.4[135.5] 877.2[199.4] 749.4[170.3] 913.8[207.7] 996.6[226.5] 1126.5[256.0]
Cond. Press. Drop psig[kPa] 4.7[32.4] 4.1[28.3] 4.5[31.1] 3.7[25.5] 4.9[33.8] 5.2[35.9] 4.8[33.1] 4.7[32.4] 4.6[31.7]
Dimensions
Length inches[mm]
164 3/16
[4171] 152 11/16 [3878] 164 3/16 [4171] 158 1/16 [4015] 174 3/16 [4425] 196 3/4 [4997] 196 3/4 [4997] 174 3/16 [4425] 196 3/4 [4997]
Width inches[mm] 70[1778] 55 1/2[1410] 70[1778] 55 9/16[1412] 70[1778] 75[1905] 80[2032] 70[1778] 80[2032]
Height inches[mm]
72 3/16
[1833] 87 3/8 [2219] 75 3/4 [1923] 87 3/8 [2219] 86 5/8 [2200] 78 [1981] 84 7/16 [2145] 86 5/8 [2200] 84 7/16 [2145]
General Information
Shipping Weight lbs[kg] 11962[5426] 10306[4676] 13075[5931] 11419[5181] 15205[6897] 14103[6397] 17414[7899] 16180[7339] 18211[8261]
Operating Weight lbs[kg] 12833[5821] 11180[5071] 14052[6374] 12398[5624] 16473[7472] 15393[6982] 18673[8470] 17633[7998] 19863[9010]
Approx. Refrig. Charge R134a lbs[kg] 705[320] 705[320] 750[340] 750[340] 981[445] 882[400] 1014[460] 1102[500] 1113[505]
*Optional compact footprint series is available. Unit height may be increased. Please consult factory for details.
Notes: 1. This physical specifications table is based on Superior vessel models with the following operation condition: inlet/outlet cooled water temperature 54/44 °F,
inlet/outlet cooling water temperature 85/95 °F, Fouling factor of evaporator 0.0001 hr.ft2.°F/Btu, Fouling factor of condenser 0.00025 hr.ft2.°F/Btu.
2. Actual capacity will depend on the specified conditions. To consult nearest Dunham-bush sales office for computer selections.
3. Non-standard chillers can be designed according to different requirements.

- 12 -
PHYSICAL SPECIFICATIONS
Model WCFX-E 50T 54T 57T 60T 69 73 73T 75T 77
Cooling Capacity TR 410 445 474.8 504.2 564 600.8 582.4 622.2 634.4 kW 1442.0 1565.1 1669.9 1773.3 1983.6 2113.0 2048.3 2188.3 2231.2
104kcal/h 124.0 134.6 143.6 152.5 170.6 181.7 176.2 188.2 191.9
Min % Unit Capacity 12.5% 12.5% 12.5% 12.5% 8.5% 8.5% 12.5% 12.5% 8.5%
Power 460/3P/60Hz
Compressor
Model (Qty) 1227(1)/
1222(1) 1227(2) 1230(1)/ 1227(1) 1230(2) 1222(3) 1227(1)/ 1222(2) 2233(2) 2236(1)/ 2233(1) 1227(2)/ 1222(1)
Power Input kW 226 245 263 281 320 338 327 349 358
RLA, Each 193/ 154 193(2) 224/ 193 224(2) 154(3) 193/ 154(2) 259(2) 309/ 259 193(2)/ 154
LRA, Each 923/ 749 923(2) 1019/ 923 1019(2) 749(3) 923/ 749(2) 1380(2) 1821/ 1380 923(2)/ 749
Evaporator
Model KBR YAR YBR YCR CGR DBR MAR MBR DCR
Connection Size inches[mm] 10[254] 10[254] 10[254] 10[254] 10[254] 12[305] 12[305] 12[305] 12[305]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 984.0[223.6] 1068.0[242.7] 1139.5[259.0] 1210.1[275.0] 1353.6[307.6] 1441.9[327.7] 1397.8[317.7] 1493.3[339.4] 1522.6[346.0]
Evap. Press. Drop psig[kPa] 4.9[33.8] 4.9[33.8] 5.1[35.1] 5.2[35.8] 6.3[43.4] 5.9[40.7] 5.6[38.6] 5.7[39.3] 6.0[41.34]
Condenser
Model T5R YAR YBR YCR 1BR 1CR JAR JBR 1CR
Connection Size inches[mm] 10[254] 10[254] 10[254] 10[254] 10[254] 10[254] 12[305] 12[305] 10[254]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 1230.0[279.7] 1335.0[303.4] 1424.4[323.7] 1512.6[343.8] 1692.0[384.6] 1802.4[409.6] 1747.2[397.1] 1866.6[424.2] 1903.2[432.5]
Cond. Press. Drop psig[kPa] 4.9[33.8] 4.8[33.1] 4.9[33.8] 5[34.5] 5.5[37.9] 5.5[37.9] 5.8[40.0] 5.3[36.5] 5.7[39.3]
Dimensions
Length inches[mm]
196 3/4
[4997] 196 3/4 [4997] 196 3/4 [4997] 196 3/4 [4997] 213 3/4 [5429] 213 3/4 [5429] 206 3/4 [5251] 206 3/4 [5251] 213 3/4 [5429]
Width inches[mm] 80[2032] 80[2032] 80[2032] 80[2032] 88[2235] 88[2235] 88[2235] 88[2235] 88[2235]
Height inches[mm]
86 7/16
[2196] 86 11/16 [2202] 86 11/16 [2202] 86 11/16 [2202] 86 [2184] 86 [2184] 82 7/8 [2104] 82 7/8 [2104] 86 [2184]
General Information
Shipping Weight lbs[kg] 19928[9039] 21645[9818] 22456[10186] 23071[10465] 26280[11920] 29203[13246] 26820[12165] 27597[12518] 29665[13456]
Operating Weight lbs[kg] 21688[9837] 23588[10699] 24486[11107] 25208[11434] 28807[13067] 31949[14492] 29144[13220] 30111[13686] 32458[14723]
Approx. Refrig. Charge R134a lbs[kg] 1312[595] 1356[615] 1422[645] 1477[670] 1731[785] 1940[880] 1455[660] 1543[700] 2017[915]
Model WCFX-E 81 81T 84 87 90 108 113 118 123
Cooling Capacity TR 668.1 665.3 697.3 726.1 753.7 875.8 916.6 953.7 998.2 kW 2381.0 2339.9 2452.0 2553.7 2650.8 3080.2 3223.7 3354.2 3510.7
104kcal/h 204.8 201.2 210.9 219.6 228.0 264.9 277.2 288.5 301.9
Min % Unit Capacity 8.5% 12.5% 8.5% 8.5% 8.5% 8.5% 8.5% 8.5% 8.5%
Power 460/3P/60Hz
Compressor
Model (Qty) 1227(3) 2236(2) 1230(1)/
1227(2) 1230(2)/ 1227(1) 1230(3) 2233(3) 2236(1)/ 2233(2) 2236(2)/ 2233(1) 2236(3)
Power Input kW 377 369 394 411 429 494 517 539 558
RLA, Each 193(3) 309(2) 224)/ 193(2) 224(2)/ 193 224(3) 259(3) 309/ 259(2) 309(2)/ 259 309(3)
LRA, Each 923(3) 1821(2) 1019/
923(2) 1019(2)/ 923 1019(3) 1380(3) 1821/ 1380(2) 1821(2)/ 1380 1821(3)
Evaporator
Model N1R NAR PCR PAR PAR SCR SDR TAR TBR
Connection Size inches[mm] 12[305] 12[305] 12[305] 12[305] 12[305] 14[356] 14[356] 14[356] 14[356]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 1603.2[364.4] 1596.7[362.9] 1672.6[380.1] 1742.6[396.1] 1808.9[411.1] 2101.9[477.7] 2199.8[500.0] 2288.9[520.2] 2395.7[544.5]
Evap. Press. Drop psig[kPa] 6.1[42.0] 5.2[35.8] 5.5[37.9] 5.6[38.6] 6.2[42.7] 5.7[39.3] 5.8[40.0] 6.1[42.0] 5.1[35.1]
Condenser
Model 7BR KAR 7BR 7CR 8AR 9AR 9BR WAR WBR
Connection Size inches[mm] 12[305] 12[305] 12[305] 12[305] 12[305] 14[356] 14[356] 14[356] 14[356]
Design Press. Water Side psig[kPa] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034] 150[1034]
Water Flow Rate USgpm[m³/hr] 2004.0[455.5] 1995.9[453.6] 2090.7[475.2] 2178.3[495.1] 2261.1[513.9] 2627.4[597.1] 2749.8[625.0] 2861.1[650.3] 2994.6[680.6]
Cond. Press. Drop psig[kPa] 5.2[35.8] 4.9[33.8] 5.6[38.6] 5.7[39.3] 5.6[38.6] 5.2[35.8] 5.0[34.5] 4.5[31.0] 4.3[29.6]
Dimensions
Length inches[mm]
213 3/4
[5429] 206 3/4 [5251] 213 3/4 [5429] 213 3/4 [5429] 213 3/4 [5429] 201 3/4 [5124] 201 3/4 [5124] 199 [5055] 199 [5055]
Width inches[mm]
88[2235] 88[2235] 88[2235] 88[2235] 88[2235] 99[2515] 99[2515] 99[2515] 99[2515]
Height inches[mm]
86
[2184] 86 7/8 [2206] 86 7/8 [2206] 86 7/8 [2206] 91 1/4 [2318] 127 15/16 [3249] 127 15/16 [3249] 129 9/16 [3291] 129 9/16 [3291]
General Information
Shipping Weight lbs[kg] 31856[14450] 29952[13586] 33704[15288] 34339[15576] 35538[16120] 41832[18975] 43084[19543] 47673[21624] 49160[22298]
Operating Weight lbs[kg] 34889[15825] 32773[14866] 36873[16725] 37608[17059] 38920[17954] 44342[20113] 45669[20715] 50533[22921] 52109[23636]
Approx. Refrig. Charge R134a lbs[kg] 2260[1025] 1808[820] 2635[1195] 2701[1225] 2701[1225] 2253[1022] 2392[1085] 2601[1180] 2833[1285]
Notes: 1. This physical specifications table is based on Superior vessel models with the following operation condition: inlet/outlet cooled water temperature 54/44 °F,
inlet/outlet cooling water temperature 85/95 °F, Fouling factor of evaporator 0.0001 hr.ft2.°F/Btu, Fouling factor of condenser 0.00025 hr.ft2.°F/Btu.
2. Actual capacity will depend on the specified conditions. To consult nearest Dunham-bush sales office for computer selections.
3. Non-standard chillers can be designed according to different requirements.

- 13 -
MODEL A B C D E F G HEIGHT I J K LENGTH M WIDTH Y(Ø) Z(Ø)
WCFX‐E10S 21/16
[53]
1611/16
[424]
1017/8
[2588]
6
[153]
21/2
[63]
101/16
[256]
51/8
[130]
7215/16
[1852]
2213/16
[580]
143/4
[374]
147/16
[366]
1241/4
[3157]
4
[102]
423/16
[1072]
5
[127]
5
[127]
WCFX‐E12S 21/16
[53]
1611/16
[424]
1017/8
[2588]
6
[153]
17/16
[37]
111/8
[282]
55/8
[143]
7215/16
[1852]
2413/16
[630]
167/16
[417]
147/16
[366]
1241/4
[3157]
4
[102]
453/16
[1148]
5
[127]
6
[152]
WCFX‐E15S 21/16
[53]
167/8
[429]
1017/8
[2588]
6
[153]
19/16
[39]
123/8
[315]
55/8
[143]
831/4
[2115]
281/8
[715]
183/16
[462]
153/8
[391]
1241/2
[3162]
41/2
[115]
505/8
[1286]
6
[152]
6
[152]
DIMENSIONAL DATA
WCFX-E 10S, 12S, 15S
WCFX-E 19S*
*Optional compact footprint series is available. Unit height may be increased. Please consult factory for details.
Notes : 1.) All dimensions are in inches[mm].
2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension.

- 14 -
MODEL A B C D E F G HEIGHT I J K LENGTH M N O P QRSWIDTH
Y(Ø) Z(Ø)
WCFX‐E20S* 20
[508]
4011/16
[1033]
4011/16
[1033]
4011/16
[1033]
25
[635]
581/2 [1486]
531/2 [1359]
6715/16
[1725]
11/8
[28]
13/8
[35]
207/8
[530]
1643/16
[4171]
11/16
[17]
13/8
[35]
55/8
[143]
157/8
[403]
205/16
[516]
281/2
[725]
55/8 [143]
70
[1778]
6
[152]
6
[152]
WCFX‐E23S* 20
[508]
4011/16
[1033]
4011/16
[1033]
4011/16
[1033]
25
[635]
581/2 [1486]
531/2 [1359]
703/16
[1783]
11/8
[28]
13/8
[35]
207/8
[530]
1643/16
[4171]
11/16
[17]
21/2
[64]
67/8 [175]
157/8
[403]
215/16
[542]
293/4
[756]
55/8 [143]
70
[1778]
6
[152]
8
[203]
WCFX‐E24S* 20
[508]
4011/16
[1033]
4011/16
[1033]
4011/16
[1033]
25
[635]
581/2 [1486]
531/2 [1359]
703/16
[1783]
11/8
[28]
13/8
[35]
207/8
[530]
1643/16
[4171]
11/16
[17]
21/2
[64]
67/8 [175]
157/8
[403]
215/16
[542]
293/4
[756]
55/8 [143]
70
[1778]
6
[152]
8
[203]
WCFX‐E27S* 20
[508]
4011/16
[1033]
4011/16
[1033]
4011/16
[1033]
25
[635]
581/2 [1486]
531/2 [1359]
723/16
[1833]
11/8
[28]
13/8
[35]
207/8
[530]
1643/16
[4171]
11/16
[17]
31/2
[89]
67/8 [175]
157/8
[403]
225/16
[567]
303/4
[782]
55/8 [143]
70
[1778]
6
[152]
8
[203]
WCFX‐E30S* 20
[508]
4011/16
[1033]
4011/16
[1033]
4011/16
[1033]
25
[635]
581/2 [1486]
531/2 [1359]
753/4
[1923]
11/8
[28]
13/8
[35]
211/8
[536]
1643/16
[4171]
11/16
[17]
21/4
[57]
67/8 [175]
157/8
[403]
225/16
[567]
313/4
[807]
61/16
[155]
70
[1778]
8
[203]
8
[203]
WCFX‐E36S 20
[508]
4011/16
[1033]
4011/16
[1033]
5011/16
[1287]
3011/16
[780]
60
[1524]
60
[1524]
865/8
[2200]
11/8
[28]
13/8
[35]
211/8
[536]
1743/16
[4425]
11/16
[17]
2
[51]
81/8
[207]
157/8
[403]
235/16
[592]
333/4
[858]
67/8 [175]
70
[1778]
8
[203]
8
[203]
WCFX‐E41S 20
[508]
4011/16
[1033]
4011/16
[1033]
5011/16
[1287]
3011/16
[780]
60
[1524]
60
[1524]
865/8
[2200]
11/8
[28]
13/8
[35]
211/8
[536]
1743/16
[4425]
11/16
[17]
1
[25]
73/8
[187]
157/8
[403]
235/16
[592]
343/4
[883]
67/8 [175]
70
[1778]
10
[254]
10
[254]
DIMENSIONAL DATA
WCFX-E 20S*, 23S*, 24S*, 27S*, 30S*, 36S, 41S
*Optional compact footprint series is available. Unit height may be increased. Please consult factory for details.
Notes : 1.) All dimensions are in inches[mm].
2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension.

- 15 -
MODEL A B C D E F G HEIGHT I JK LENGTH M WIDTH Y(Ø) Z(Ø)
WCFX‐E20T* 6
[152]
523/8
[1330]
151/4
[387]
183/16
[462]
273/8
[695]
121/8
[303]
15/8
[41]
6
[153]
134
[3404]
125/8
[321]
2
[51]
WCFX‐E22T* 2
[51]
134
[3404]
131/8
[333]
67/8
[175]
193/16
[487]
6
[152]
8
[203]
291/4
[743]
131/8
[333]
134
[3404]
2
[51]
WCFX‐E24T* WCFX‐E27T* 2
[51]
134
[3404]
141/2
[368]
29
[737]
203/16
[513]
6
[152]
8
[203]
8
[203]
61/16
[155]
161/4
[413]
67/8
[175]
134
[3404]
2
[51]
WCFX‐E30T*
6
[152]
8
[203]
6
[152]
8
[203]
1523/16
[3866]
15211/16
[3878]
1581/16
[4015]
1523/16
[3866]
291/4
[743]
55/8
[143]
55/8
[143]
55/8
[143]
55/8
[143]
193/16
[487]
203/16
[513]
151/4
[387]
151/4
[387]
151/4
[387]
55/8 [143]
67/8
[175]
67/8
[175]
125/8
[321]
125/8
[321]
127/8
[327]
181/4
[464]
787/8
[2003]
1523/16
[3866]
6
[153]
6
[153]
6
[153]
6
[153]
56
[1422]
5511/16
[1414]
5511/16
[1414]
579/16
[1462]
141/2
[368]
2813/16
[732]
807/8 [2054] 807/8 [2054] 873/8 [2219] 873/8 [2219]
17/8
[48]
17/8
[48]
17/8
[48]
17/8
[48]
DIMENSIONAL DATA
WCFX-E 20T*, 22T*, 24T*, 27T*, 30T*
*Optional compact footprint series is available. Unit height may be increased. Please consult factory for details.
Notes : 1.) All dimensions are in inches[mm].
2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension.

- 16 -
MODEL A B C D E F G HEIGHT I J K LENGTH M N O P QRSWIDTH
Y(Ø) Z(Ø)
WCFX‐E38T* 15
[381]
60
[1524]
60
[1524]
45
[1143]
24
[610]
681/2 [1740]
781/2
[1994]
78
[1981]
7/8
[22]
17/8
[48]
211/8
[537]
1963/4
[4997]
11/2
[38]
21/4
[57]
67/8
[175]
171/2
[445]
243/16
[614]
313/4
[807]
61/16
[155]
75
[1905]
8
[203]
8
[203]
WCFX‐E40T* 15
[381]
60
[1524]
60
[1524]
45
[1143]
24
[610]
681/2 [1740]
781/2
[1994]
847/16
[2145]
7/8
[22]
17/8
[48]
211/8
[537]
1963/4
[4997]
11/2
[38]
2
[51]
81/8 [207]
20
[508]
265/16
[669]
353/4
[909]
67/8
[175]
80
[2032]
10
[254]
10
[254]
WCFX‐E46T* 15
[381]
55
[1397]
55
[1397]
55
[1397]
26
[660]
641/2 [1638]
641/2 [1638]
847/16
[2145]
7/8
[22]
17/8
[48]
1815/16
[480]
1963/4
[4997]
11/2
[38]
2
[51]
81/8
[207]
20
[508]
265/16
[669]
353/4
[909]
67/8
[175]
80
[2032]
10
[254]
10
[254]
WCFX‐E50T 15
[381]
55
[1397]
55
[1397]
55
[1397]
26
[660]
641/2 [1638]
641/2 [1638]
867/16
[2196]
7/8
[22]
17/8
[48]
1815/16
[480]
1963/4
[4997]
11/2
[38]
3
[76]
85/8 [219]
20
[508]
275/16
[694]
363/4
[934]
67/8
[175]
80
[2032]
10
[254]
10
[254]
WCFX‐E54T 15
[381]
55
[1397]
55
[1397]
55
[1397]
26
[660]
641/2 [1638]
641/2 [1638]
8611/16
[2202]
7/8
[22]
17/8
[48]
1815/16
[480]
1963/4
[4997]
11/2
[38]
37/8
[99]
85/8 [219]
20
[508]
285/16
[719]
3911/16
[1008]
73/8
[187]
80
[2032]
10
[254]
10
[254]
WCFX‐E57T 15
[381]
55
[1397]
55
[1397]
55
[1397]
26
[660]
641/2 [1638]
641/2 [1638]
8611/16
[2202]
7/8
[22]
17/8
[48]
1815/16
[480]
1963/4
[4997]
11/2
[38]
37/8
[99]
85/8 [219]
20
[508]
285/16
[719]
3911/16
[1008]
73/8
[187]
80
[2032]
10
[254]
10
[254]
WCFX‐E60T 15
[381]
55
[1397]
55
[1397]
55
[1397]
26
[660]
641/2 [1638]
641/2 [1638]
8611/16
[2202]
7/8
[22]
17/8
[48]
1815/16
[480]
1963/4
[4997]
11/2
[38]
37/8
[99]
85/8 [219]
20
[508]
285/16
[719]
3911/16
[1008]
73/8
[187]
80
[2032]
10
[254]
10
[254]
WCFX‐E73T 15
[381]
5311/16
[1363]
6011/16
[1541]
6011/16
[1541]
25
[635]
74
[1880]
81
[2057]
827/8
[2104]
7/8
[22]
17/8
[48]
205/8
[524]
2063/4
[5251]
11/2
[38]
33/4
[95]
101/8
[258]
241/2
[622]
255/16
[643]
411/2
[1055]
8
[203]
88
[2235]
12
[305]
12
[305]
WCFX‐E75T 15
[381]
5311/16
[1363]
6011/16
[1541]
6011/16
[1541]
25
[635]
74
[1880]
81
[2057]
827/8
[2104]
7/8
[22]
17/8
[48]
205/8
[524]
2063/4
[5251]
11/2
[38]
33/4
[95]
101/8
[258]
241/2
[622]
255/16
[643]
411/2
[1055]
8
[203]
88
[2235]
12
[305]
12
[305]
WCFX‐E81T 15
[381]
5311/16
[1363]
6011/16
[1541]
6011/16
[1541]
25
[635]
74
[1880]
81
[2057]
867/8
[2206]
7/8
[22]
17/8
[48]
205/8
[524]
2063/4
[5251]
11/2
[38]
41/4
[108]
101/8
[258]
241/2
[622]
275/16
[694]
421/2
[1080]
81/8
[207]
88
[2235]
12
[305]
12
[305]
DIMENSIONAL DATA
WCFX-E 38T*, 40T*, 46T*, 50T, 54T, 57T, 60T, 73T, 75T, 81T
*Optional compact footprint series is available. Unit height may be increased. Please consult factory for details.
Notes : 1.) All dimensions are in inches[mm].
2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension.

- 17 -
MODEL A BCDEFGHEIGHTI JKLENGTHMNOPQRSWIDTH
Y(Ø) Z(Ø)
WCFX‐E69 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
86
[2184]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
27/8
[74]
85/8
[219]
251/2
[648]
245/16
[618]
4011/16
[1033]
81/8
[207]
88
[2235]
10
[254]
10
[254]
WCFX‐E73 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
86
[2184]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
33/4
[95]
101/8
[258]
251/2
[648]
245/16
[618]
411/2
[1055]
81/8
[207]
88
[2235]
10
[254]
12
[305]
WCFX‐E77 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
86
[2184]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
33/4
[95]
101/8
[258]
251/2
[648]
245/16
[618]
411/2
[1055]
81/8
[207]
88
[2235]
10
[254]
12
[305]
WCFX‐E81 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
86
[2184]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
41/4
[108]
103/16
[259]
251/2
[648]
275/16
[694]
411/2
[1055]
81/8
[207]
88
[2235]
12
[305]
12
[305]
WCFX‐E84 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
867/8
[2206]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
51/4
[133]
103/16
[259]
251/2
[648]
275/16
[694]
421/2
[1080]
81/8
[207]
88
[2235]
12
[305]
12
[305]
WCFX‐E87 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
867/8
[2206]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
51/4
[133]
103/16
[259]
251/2
[648]
275/16
[694]
421/2
[1080]
81/8
[207]
88
[2235]
12
[305]
12
[305]
WCFX‐E90 15
[381]
6011/16
[1541]
6011/16
[1541]
6011/16
[1541]
25
[635]
81
[2057]
81
[2057]
911/4
[2318]
7/8
[22]
17/8
[48]
205/8
[524]
2133/4
[5429]
11/2
[38]
33/8
[85]
103/16
[259]
251/2
[648]
275/16
[694]
45
[1144]
87/8
[226]
88
[2235]
12
[305]
12
[305]
DIMENSIONAL DATA
WCFX-E 69, 73, 77, 81, 84, 87, 90
Notes : 1.) All dimensions are in inches[mm].
2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension.

- 18 -
MODEL A B C D E F G HEIGHT I J K LENGTH M N O P QRSWIDTH
Y(Ø) Z(Ø)
WCFX‐E108 20
[508]
535/16
[1355]
535/16
[1355]
535/16
[1355]
25
[635]
76
[1930]
74
[1880]
12715/16
[3249]
7/8
[22]
17/8
[48]
177/8
[454]
2013/4
[5124]
11/2
[38]
31/2
[89]
103/4
[273]
92
[2337]
355/16
[897]
5111/16
[1312]
103/4
[273]
99
[2515]
14
[356]
14
[356]
WCFX‐E113 20
[508]
535/16
[1355]
535/16
[1355]
535/16
[1355]
25
[635]
76
[1930]
74
[1880]
12715/16
[3249]
7/8
[22]
17/8
[48]
191/4
[489]
2013/4
[5124]
11/2
[38]
31/2
[89]
103/4
[273]
92
[2337]
355/16
[897]
5111/16
[1312]
103/4
[273]
99
[2515]
14
[356]
14
[356]
WCFX‐E118 20
[508]
527/16
[1331]
527/16
[1331]
527/16
[1331]
27
[686]
725/8 [1845]
725/8
[1845]
1299/16
[3291]
7/8
[22]
17/8
[48]
177/8
[454]
199
[5055]
11/2
[38]
31/2
[89]
103/4
[273]
92
[2337]
355/16
[897]
535/8
[1361]
103/4
[273]
99
[2515]
14
[356]
14
[356]
WCFX‐E123 20
[508]
527/16
[1331]
527/16
[1331]
527/16
[1331]
27
[686]
725/8 [1845]
725/8
[1845]
1299/16
[3291]
7/8
[22]
17/8
[48]
177/8
[454]
199
[5055]
11/2
[38]
31/2
[89]
103/4
[273]
92
[2337]
355/16
[897]
535/8
[1361]
103/4
[273]
99
[2515]
14
[356]
14
[356]
DIMENSIONAL DATA
WCFX-E 108, 113, 118, 123
Notes : 1.) All dimensions are in inches[mm].
2.) Above drawing is for Superior model. Consult factory for Standard and Premium model dimension.

- 19 -
FLOOR LOADING DIAGRAM
WCFX-E 10S, 12S, 15S, 19S WCFX-E 108, 113, 118, 123
20T, 22T, 24T, 27T, 30T
WCFX-E 20S, 23S, 24S, 27S, 30S, 36S, 41S,
38T, 40T, 46T, 50T, 54T, 57T, 60T, 73T, 75T, 81T,
69, 73, 77, 81, 84, 87, 90
POINT LOAD DATA
Model
WCFX-E P1 P2 P3 P4 P5 P6 P7 P8 P9 Operating Weight
lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg lbs kg
10S 1186 538 1845 837 930 422 1441 654 - - - - - - - - - - 5402 2450
12S 1382 627 2150 975 1083 491 1679 762 - - - - - - - - - - 6294 2855
15S 1452 659 2259 1025 1138 516 1764 800 - - - - - - - - - - 6613 3000
19S 1131 513 1545 701 1034 469 1420 644 935 424 1296 588 838 380 1171 531 - - 9370 4250
20S 1292 586 1934 877 1173 532 1764 800 1054 478 1595 724 935 424 1426 647 - - 11173 5068
20T 1786 810 2892 1312 1742 790 2509 1138 - - - - - - - - - - 8929 4050
22T 1940 880 3144 1426 1889 857 2727 1237 - - - - - - - - - - 9700 4400
23S 1329 603 2023 918 1210 549 1846 837 1090 494 1670 757 970 440 1493 677 - - 11631 5276
24S 1411 640 2106 955 1273 578 1918 870 1136 515 1731 785 999 453 1544 700 - - 12118 5497
24T 2094 950 3391 1538 2039 925 2941 1334 - - - - - - - - - - 10465 4747
27S 1468 666 2247 1019 1329 603 2049 929 1190 540 1850 839 1050 476 1651 749 - - 12833 5821
27T 2238 1015 3622 1643 2178 988 3142 1425 - - - - - - - - - - 11180 5071
30S 1621 735 2456 1114 1463 664 2238 1015 1305 592 2020 916 1147 520 1802 817 - - 14052 6374
30T 2482 1126 4019 1823 2414 1095 3483 1580 - - - - - - - - - - 12398 5624
36S 1709 775 2838 1287 1608 729 2653 1203 1507 684 2468 1120 1406 638 2283 1036 - - 16473 7472
38T 1936 878 2357 1069 1793 813 2202 999 1651 749 2048 929 1510 685 1896 860 - - 15393 6982
40T 2348 1065 2859 1297 2176 987 2672 1212 2004 909 2485 1127 1832 831 2297 1042 - - 18673 8470
41S 1813 822 3055 1386 1705 773 2856 1296 1597 724 2658 1205 1489 676 2459 1115 - - 17633 7998
46T 2337 1060 3057 1387 2233 1013 2875 1304 2129 966 2694 1222 2025 919 2512 1140 - - 19863 9010
50T 2521 1144 3385 1536 2403 1090 3181 1443 2285 1036 2976 1350 2166 983 2771 1257 - - 21688 9837
54T 2696 1223 3713 1684 2579 1170 3489 1583 2461 1116 3265 1481 2343 1063 3041 1380 - - 23588 10699
57T 2811 1275 3809 1728 2698 1224 3590 1628 2585 1173 3371 1529 2472 1121 3151 1429 - - 24486 11107
60T 2888 1310 3897 1768 2786 1264 3677 1668 2684 1218 3456 1568 2582 1171 3236 1468 - - 25208 11434
69 3589 1628 4396 1994 3330 1511 4133 1875 3072 1393 3869 1755 2813 1276 3605 1635 - - 28807 13067
73 3910 1773 4973 2256 3616 1640 4670 2118 3322 1507 4366 1981 3029 1374 4063 1843 - - 31949 14492
73T 3733 1693 4850 2200 3255 1476 4464 2025 2777 1259 4077 1849 2298 1042 3690 1674 - - 29144 13220
75T 3840 1742 5012 2274 3354 1521 4615 2094 2868 1301 4219 1914 2382 1080 3822 1734 - - 30111 13658
77 3983 1807 5033 2283 3688 1673 4727 2144 3393 1539 4421 2005 3098 1405 4115 1867 - - 32458 14723
81 4205 1907 5454 2474 3910 1773 5125 2325 3614 1639 4796 2175 3318 1505 4467 2026 - - 34889 15825
81T 4082 1852 5504 2497 3582 1625 5076 2302 3082 1398 4647 2108 2582 1171 4218 1913 - - 32773 14866
84 4441 2014 5750 2608 4132 1874 5411 2454 3823 1734 5072 2300 3514 1594 4732 2147 - - 36873 16725
87 4538 2059 5845 2651 4228 1918 5502 2495 3917 1777 5158 2340 3606 1635 4815 2184 - - 37608 17059
90 4659 2113 6050 2744 4358 1977 5698 2585 4058 1841 5346 2425 3758 1704 4994 2265 - - 38920 17654
108 4596 2085 4993 2265 4795 2175 5348 2426 4696 2130 5171 2345 4776 2166 5053 2292 4914 2229 44342 20113
113 4713 2138 5141 2332 4946 2243 5523 2505 4830 2191 5332 2419 4908 2226 5215 2366 5062 2296 45669 20715
118 5150 2336 5729 2598 5430 2463 6176 2801 5290 2400 5953 2700 5419 2458 5785 2624 5602 2541 50533 22921
123 5322 2414 5919 2685 5581 2532 6363 2886 5452 2473 6141 2786 5599 2540 5955 2701 5777 2620 52109 23636
Notes: 1.) Refer to dimensional drawings for location of mounting points.
2.) Unit must be lowered onto mounting springs in a level fashion or spring damage may occur.

- 20 -
1
10
100
100 1000 10000
PressureDrop - ft.wg
WaterFlowRate-USgpm
1
10
100
100 1000 10000
PressureDrop - ft.wg
WaterFlowRate- USgpm
1
10
100
100 1000 10000
PressureDrop - ft.wg
WaterFlowRate-USgpm
24S
27S
30S
36S
41S
10S
12S
15S
19S
24S,27S
30S
36S
41S
10S
12S
15S
20S,23S
54T
57T
60T
73T
75T
81T
19S,20S,23S
1
10
100
1000 10000 100000
PressureDrop - ft.wg
WaterFlowRate-USgpm
50T
46T
1
10
100
1000 10000
PressureDrop - ft.wg
WaterFlowRate- USgpm
1
10
100
100 1000 10000
PressureDrop - ft.wg
WaterFlowRate-USgpm
46T,50T
73T
75T
81T
54T,57T
60T
20T
22T, 24T
27T
30T
38T
40T
20T
22T
24T
27T
30T
38T
40T
WATER PRESSURE DROP
IMPERIAL UNITS
1A.) EVAPORATOR 1 PASS
a.) Single Compressor
b.) Twin Compressors
c.) Three Compressors
1B.) EVAPORATOR 2 PASS
a.) Single Compressor
b.) Twin Compressors
c.) Three Compressors
Note : Above water pressure drop is for Superior model. Consult factory for Standard and Premium model.
69,73,77
81,84
87,90
123
108, 113,118
69
73,77
81,84
87
90 108
113
118
123