Goodman WMC125S User Manual
Catalog 602-8
Magnitude
®
Magnetic Bearing Centrifugal Chillers
Model WMC, C Vintage
125 to 400 Tons (440 to 1400 kW)
HFC-134a Refrigerant
60/50 Hz
Introduction..................................3
Technology That Just Makes Sense .............3
Features and Benets Summary ................3
Features and Benets .........................4
The Compressor Technology ...................4
Integrated Variable Frequency Drive .............5
The Control Technology .......................5
Certications and Standards....................6
Factory Testing ..............................7
Dimensions and Weights.......................8
Unit Dimensions and Shipping Weight ............8
Drawing Notes ..............................9
Options and Accessories .....................10
Unit Options ...............................10
Vessel Options .............................10
Controls Options ............................10
Electrical Options ...........................11
Special Order Options........................11
Table of ConTenTs
Table of ConTenTs
Refrigeration Diagram ........................12
Application Considerations....................13
Location Requirements.......................13
Vibration Mounting ..........................13
System Design .............................13
Optimizing Efciency . . . . . . . . . . . . . . . . . . . . . . . . 13
Evaporator ................................14
Condenser ................................14
Retrot Knockdown .........................16
Engineering Guide Specications ..............18
Manufactured in an ISO 9001 & ISO 14001 certied facility
©2015 Daikin Applied. Illustrations and data cover the Daikin Applied product at the time of publication and we reserve the right to
make changes in design and construction at any time without notice.
CAT 602-8 • MAGNITUDE® MODEL WMC CHILLERS 2 www.DaikinApplied.com
InTroduCTIon
InTroduCTIon
WMC 100 - 400 Tons
Magnitude® Magnetic Bearing Chillers
Model WMC 145-400D
WME 400 - 1500 Tons
Model WME 500-700S
100 300 500 700 900 1100 15001300
Technology That Just Makes Sense
The industry’s next generation of centrifugal chillers is here
today with Daikin Magnitude® chillers. The new technology
begins with centrifugal compressors utilizing magnetic
bearings for oil-free operation, integral variable-frequency
drives, and direct drive technology. The high efciency
compressor is matched with highly efcient heat exchanges
to make an impressive chiller. Magnitude® chillers have many
important features:
• State-of-the-art magnetic bearing compressor
with oil-free technology
• Unit-mounted Variable Frequency Drive
• Positive pressure design
• Hermetic, permanent magnet, direct-drive motor
• User-friendly MicroTech® controls
• Open Choices™ feature for BAS of your choice
• HFC-134a refrigerant
(Zero ozone depletion and no refrigerant phase out)
• AHRI cer tication
Features and Benets Summary
The Compressor Technology
• Magnetic bearing system that results in greater efciency
and reliability, more sustainable performance, reduced
operating and maintenance costs, and low vibration and
sound levels compared to traditional oil centrifugals.
Integrated Variable Frequency Drive (VFD)
• Unit-mounted VFD modulates compressor speed to
obtain optimum efciency at all load and lift conditions.
The Control Technology
• Onboard digital electronics provide smart controls and
include a regenerative power system, user-friendly
operator interface, RapidRestore® option, and Open
Choices™ BAS exibility.
Certications and Standards
• Meets ASHR AE Std. 90.1, AHRI 550/590 and IBC/
OSHPD Seismic, and contributes to LEED® credits.
Factory Testing
• Ensures trouble free startup and reliable operation.
Model WME 1000-1500D
www.DaikinApplied.com 3 CAT 602-8 • MAGNITUDE® MODEL WMC CHILLERS
The Compressor Technology
Model WMC’s exceptional efciency and reliability is due
to its cutting-edge permanent magnet motor and magnetic
bearing compressor technology. A digitally-controlled
magnetic bearing system replaces conventional oil lubricated
bearings and a direct drive motor eliminates the need for a
lubricated gear box. The compressor shaft, shown in Figure
Figure 1: Magnetic Bearing Compressor
2
1
3
feaTures and benefITs
1, levitates on a magnetic cushion and is the compressor’s
only major moving component. Sensors at each magnetic
bearing provide real-time feedback to the bearing control
system. As a result of this sophisticated design, model WMC
has many advantages over chillers with traditional centrifugal
compressors.
1. Magnetic Bearings and Bearing Sensors
3
1
2. Permanent Magnet Synchronous Motor
3. Backup Bearings
4. Shaft and Impellers
5
5. Compressor Cooling
feaTures and benefITs
4
Oil-Free Compressor Design Benets
No Oil Management System = Greater Reliability
With magnetic bearings operating in a magnetic eld
instead of oil-lubricated bearings, the oil handling
equipment is removed. No need for:
oil pumps
oil reservoirs
oil coolers
oil lters
water regulating valves
oil relief valves
oil storage and disposal
oil system controls, starter, piping, heaters, etc.
that are needed to maintain oil quality. These devices can
be a fault source in traditional chillers, and removing them
signicantly increases unit and system reliability.
Totally Oil-Free Operation = Greater Efciency
The use of oil-free magnetic bearing technology
signicantly increases chiller efciency by reducing
frictional losses within the bearing system.
In addition, efciency improvements can be realized since
there is no oil to coat the heat transfer surfaces.
No Oil Loss = Sustainable Performance
With no possibility of oil loss at light loads or due to
worn seals, the original energy saving efciency can be
maintained for the life of the chiller.
No Oil System = Low Vibration & Sound Levels
With the use of magnetic bearings, the compressor
vibration levels are extremely low, minimizing vibration that
could be transmitted to the structure.
With low vibration levels, sound levels are lower compared
to traditional centrifugal chillers.
No Oil System = Reduced Maintenance Costs
With oil removed from the system, oil samples, oil changes,
oil system maintenance, oil lter changes, and leaks are
eliminated.
CAT 602-8 • MAGNITUDE® MODEL WMC CHILLERS 4 www.DaikinApplied.com
feaTures and benefITs
Additional Compressor Design Benets
Model WMC’s magnetic bearing compressor design offers
many benets not only because of its oil free design but also
because of its use of a positive pressure refrigerant and a
variable frequency drive.
Environmentally Friendly
Over time negative pressure chillers (such as those using
HCFC-123) may draw air and moisture into the system, which
can signicantly increase energy consumption. Since the
Magnitude
(HFC-134a), the industry-leading efciency can be maintained
for the life of the chiller. In addition, HFC-134a has no ozone
depletion potential and no phase-out schedule per the
Montreal protocol unlike HCFC type refrigerants used in low
pressure designs.
Low Operating Costs
Model WMC offers world class part load efciency due to its
advanced permanent magnet motor and magnetic bearing
VFD compressor design. This allows for signicant energy
savings at off-design conditions compared to xed speed
chillers. See AHRI Certication on page 3 for more
information on part load performance.
®
WMC chiller uses a positive pressure refrigerant
Integrated Variable Frequency Drive
A Variable Frequency Drive (VFD) modulates compressor
speed in response to load and evaporator/condenser
pressure. When minimum speed is reached, moveable inlet
guide vanes redirect the gas ow into the impeller. VFD’s have
the following benets:
• Reduced annual energy costs when there are long
periods of part load operation and/or low compressor lift
(lower condenser water temperature)
• Reduced motor starting inrush current
• Reduced size of backup generators used to provide
emergency power to chillers used on mission critical
applications
• Increased power factor to reduce utility surcharges
WMC Reduced Harmonic Option
The Institute of Electrical and Electronics Engineers (IEEE)
has developed a standard (IEEE519) that denes acceptable
limits of site specic system current and voltage distortion.
The designer may wish to consult this standard to ensure
acceptable levels of harmonic distortion are maintained.
The standard VFD includes 5% line reactors, which
dramatically reduce the harmonic distortion. An optional unit-
mounted harmonic lter is available for all models to meet
lower harmonic level requirements.
The Control Technology
It is only tting that this revolutionary chiller design be
matched with the advanced control technology to give
you the ultimate chiller performance. Our control design
includes many unique energy-saving features and interface
enhancements.
MicroTech® II Controller
The model WMC chiller utilizes MicroTech® II digital control
electronics to proactively manage unit operation and provide
control of external chilled water and cooling tower pumps.
The compressor runs at the minimum speed necessary to
maintain cooling capacity and lift (which decreases with lower
condenser water temperatures), thus minimizing energy usage
over the entire range of operating conditions. By constantly
monitoring chiller status and real time data, the MicroTech
controller will automatically take proactive measures to relieve
abnormal conditions or shut the unit down if a fault occurs.
Additional smart features that optimize operating efciency
have been incorporated into our MicroTech
• Cooling tower control including on/off, staging, and VFD
• Direct control of water pumps
• Chilled water rest
• Demand limit control
• Ability to stage up to four WMC chillers
®
II controls:
Operator Interface
Operation simplicity was one of the main considerations in the
development of the MicroTech
interface is a 15-inch, color touch-screen monitor that is
mounted on an adjustable arm. Key operating parameters and
setpoints are easily accessible. For added convenience, the
unit Operating and Maintenance Manual is also viewable on
the touch-screen panel.
In order to track chiller performance, the MicroTech
controller can record and plot water temperatures, refrigerant
pressures, and motor load. These values can be downloaded
through a convenient USB port in the interface and exported
into a spreadsheet for further evaluation and record purposes.
The trend history screen is shown in Figure 2.
®
II control system. The operator
®
II
®
II
www.DaikinApplied.com 5 CAT 602-8 • MAGNITUDE® MODEL WMC CHILLERS
0
10
20
30
40
50
1007550
25
1 P ercent
42 Percent
45 Percent
12 Percent
Percent Ton-Hour Weighting
Percent Load
feaTures and benefITs
Figure 2: Operator Interface Trend History Screen
The controller memory (no batteries required) also retains
the fault history for troubleshooting and monitoring unit
performance. A time/date stamp is associated with each fault.
The fault history can be downloaded through the USB port.
RapidRestore
®
Mission critical facilities such as data centers and hospitals
are demanding stringent capabilities for chillers to restart and
reach full load operation quickly in the event of a power loss.
With the capability of RapidRestore
®
, Magnitude® model WMC
chillers are engineered to meet those needs. See Table 1 for
specications.
Open Choices™ BAS Flexibility
The exclusive Open Choices™ feature provides seamless
integration and comprehensive monitoring, control, and twoway data exchange using industry standard protocols such as
LonTalk
®
, BACnet® or Modbus®. Open Choices™ offers simple
and inexpensive exibility to use the Building Automation
System (BAS) of your choice without an expensive gateway
panel. Open Choices
™
benets include:
• Easy to integrate into your BAS of choice
• Factory- or eld-installed communications module
• Integrated control logic for factory options
• Easy-to-use local user interface
• Comprehensive data exchange
Certications and Standards
As with many other Daikin Applied chiller products, the
Magnitude
and standards.
AHRI Certication
Part load performance can be presented in terms of Integrated
Part Load Value (IPLV), which is dened by AHRI Standard
550/590. Based on AHRI Standard 550/590, and as shown
in Figure 3, a typical chiller can operate up to 99% of the time
at off-peak conditions and usually spends most of this time at
less than 60% of design capacity.
Figure 3: IPLV Dened by AHRI Standard 550/590
®
model WMC meets all necessary certications
RapidRestore® – Quickly restores cooling capacity
when power is restored after a power failure
• Compressor Start – Amount of time required for
the chiller to restart
• Fast Loading – Amount of time required for the
chiller to reach a certain load condition
®
Table 1: WMC RapidRestore
Times- After Power
Restoration
Compressor Start Fast Loading to 80% Load
43 sec 120 sec*
* Estimated load time. Ti mes may var y depen ding on operating c onditions.
WMC chillers are rated and certied to AHRI Standard
550/590. The ability of the WMC chillers to achieve very high
part load efciencies, as evidenced by their world-class IPLV
ratings, is due primarily to the use of a variable frequency
drive and the low friction of the magnetic bearing system. For
more information on variable frequency drives, see Integrated
Variable Frequency Drive on page 2.
CAT 602-8 • MAGNITUDE® MODEL WMC CHILLERS 6 www.DaikinApplied.com
feaTures and benefITs
Compliance with ASHRAE Std. 90.1
ASHRAE Standard 90.1 was developed to assist owners
and designers make informed choices on a building’s
design, systems, and equipment selection. Model WMC
can signicantly exceed ASHRAE 90.1 minimum efciency
requirements.
IBC/OSHPD Seismic Certication
Daikin Magnitude® WMC chillers have been tested and
certied by an independent agency, experts in seismic
analysis and design to meet IBC seismic and OSHPD preapproval. Find more information about seismic requirements
and HVAC systems at www.DaikinApplied.com.
®
LEED
For building owners who wish to pursue Leadership in
Energy and Environmental Design (LEED
Certication, the performance of the WMC may contribute
points towards Energy and Atmosphere (EA) Credits 1 and 4.
Points earned for EA Credit 1 are awarded based on overall
building efciency. The high efciency of the WMC will
contribute to the total points earned for this credit.
EA Credit 4 qualication is partially determined by tonnage
and refrigerant quantity. Vessel stack and tube count
selections will affect the quantity of refrigerant in the chiller.
Consult with your Daikin Applied sales representative for more
information.
®
) Green Building
Demand Distortion of a facility. It projects whether the facility
complies with the TDD recommendations of IEEE 519-2014
and allows AC line reactors and/or harmonic lters to be
added to the system to model their impact. Daikin can also
provide custom harmonic distortion estimations when design
data of the system is provided.
Factory Testing
All Daikin Applied centrifugal chillers (50 or 60 hertz) are
factory-tested prior to shipment. Operating and safety controls
are checked for correct settings and operation. This testing
helps reduce eld start-up issues and maintain critical
construction schedules.
The IEEE 519-2014 Standard
The Institute of Electrical and Electronics Engineers (IEEE)
has developed a standard that recommends distortion limits
for both power utilities and their customers. The purpose
of these limits is to ensure that the voltage distortion of the
utility’s public power grid is maintained at an acceptable level.
To accomplish this, IEEE 5192014 presents recommended
harmonic current distortion limits for utility customers. These
limits are based on the peak demand of the customer. This
is called the Total Demand Distortion (TDD). This standard
provides a sliding scale for the recommended TDD limit for
each utility customer. The greater the demand that a customer
places on the utility, the more stringent the recommended
TDD limits.
IEEE 519-2014 clearly states that the TDD is to be measured
at the point where a utility customer connects to the public
utility. It does not apply to any points inside the customer’s
facility; it only applies to the point where another utility
customer could connect to the public power grid. If the
utility’s customers comply with the TDD limits stated in IEEE
519-2014, it is then the utility’s responsibility to provide
voltage to its customers that meets the harmonic voltage
recommendations of this standard.
Harmonic Distortion Analysis
An electronic calculation worksheet is available from Daikin
that is intended to be used as a tool for estimating the Total
www.DaikinApplied.com 7 CAT 602-8 • MAGNITUDE® MODEL WMC CHILLERS
dImensIons and WeIghTs
dImensIons and WeIghTs
Unit Dimensions and Shipping Weight
Figure 4: WMC 125S, 145S and 200S (2-pass, right-hand conguration, with grooved connections)
L W
H
Figure 5: WMC 145D, 150D, 225D, 250D, 275D, 290D, 350D and 400D (2-pass, right-hand conguration, with grooved connections)
L
W
H
Table 2: WMC125-400 Dimensions and Shipping Weights
Model Heat Exchanger
Length
in (mm)
Width *
in (mm)
Height
in (mm)
Shipping Weight **
WMC125S E2209 / C2009 134.3 (3411) 43.5 (1105) 81.0 (2057) 5086 (2307)
WMC145S E2209 / C2009 134.3 (3411) 43.5 (1105) 81.0 (2057) 5586 (2534)
WMC145D E2209 / C2009 134.3 (3411) 43.5 (1105) 80.8 (2052) 6760 (3066)
WMC150D E2212 / C2012 169.2 (4298) 43.5 (1105) 80.8 (2052) 7709 (3497)
WMC200S E2609 / C2209 134.2 (3409) 47.2 (1199) 82.9 (2106) 6705 (3041)
WMC225D E2609 / C2209 134.2 (3409) 47.2 (1199) 83.8 (2129) 7250 (3289)
WMC250D E2609 / C2209 134.2 (3409) 47.2 (1199) 83.8 (2129) 7850 (3561)
WMC275D E2612 / C2212 169.1 (4295) 47.2 (1199) 83.9 (2131) 8221 (3729)
WMC290D E2612 / C2212 169.1 (4295) 47.2 (1199) 83.9 (2131) 9321 (4228)
WMC350D E3009 / C2609 139.6 (3545) 55.2 (1402) 94.2 (2395) 11147 (5056)
WMC400D E3012 / C2612 168.5 (4280) 55.2 (1402) 94.3 (2395) 11574 (5250)
* Width is based on un it witho ut optional harm onic lte rs.
** Shippi ng weight i s based on unit with st andard t ube congurati on.
lb (kg)
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