Goodman WMC145D User Manual

Engineered for flexibility and performance™

Magnitude™ Magnetic Bearing Centrifugal Chillers Catalog 602-2

Model WMC, B Vintage • 145 to 400 tons • 500 to 1400 kW • R-134a

Cutaway View of Magnetic Bearing Compressor

Compressor Major Running Gear Components

MicroTech II® Controller Operator Interface, Home Screen

Table of Contents

Manufactured in an ISO Certified Facility

Document: Catalog 602-2

Modbus™

Applies to 60 HZ only

The New Compressor Technology ........................................................................................................................ 4

Benefit Summary ............................................................................................................................................ 4

The Compressor Technology .......................................................................................................................... 5

Low Operating Costs ...................................................................................................................................... 6

Environmental Responsibility ........................................................................................................................ 6

Unit Control Features ..................................................................................................................................... 7

MicroTech II ® Control Features and Benefits ................................................................................................ 8

Unit Design Features ........................................................................................................................................... 12

Chiller Identification ........................................................................................................................................... 16

Sound Data ........................................................................................................................................................... 17

One-Third Octave Band ................................................................................................................................ 17

Dimensions ........................................................................................................................................................... 19

Marine Water Box Dimensions ..................................................................................................................... 25

Physical Data and Weights ................................................................................................................................. 27

Physical Data ................................................................................................................................................ 28

Relief Valves ......................................................................................................................................................... 29

Electrical Data ..................................................................................................................................................... 30

Power Factor Correction ............................................................................................................................... 40

VFD Line Harmonics ................................................................................................................................... 40

Application Considerations ................................................................................................................................ 42

Location ........................................................................................................................................................ 42

Optimum Water Temperatures and Flow ...................................................................................................... 42

System Water Volume ................................................................................................................................... 44

Pump Control ................................................................................................................................................ 44

Retrofit Knockdown ..................................................................................................................................... 45

Pressure Drop Curves ................................................................................................................................... 46

Options and Accessories...................................................................................................................................... 49

Refrigerant Recovery Units ................................................................................................................................ 51

Refrigerant Monitors .......................................................................................................................................... 52

Specifications ....................................................................................................................................................... 54

*Unit Controllers are LONMARK certified with an optional LONWORKS communication module.

Original Issue Date: February 2009
Revision Issue Date: May 2013
Replaces: February 2013
Software Version V08.20

©2013 Daikin Applied. Illustrations and data cover the Daikin product at the time of publication and we reserve the right to make
changes in design and construction at anytime without notice. ™® The following are trademarks or registered trademarks of their
respective companies: BACnet from ASHRAE; LONMARK, LonTalk, LONWORKS, and the LONMARK logo are managed, granted and
used by LONMARK International under a license granted by Echelon Corporation; Modbus from Schneider Electric; MicroTech II,
Open Choices from Daikin.

Catalog 602-2 3

Applies to 60 HZ only

The New Compressor Technology

For Magnitude™ Model WME information see Catalog 604

Next Generation Centrifugal -

Here Today

The industry’s next generation of centrifugal chillers
is here today with Daikin Magnitude chillers. The new
technology begins with centrifugal compressors
utilizing frictionless magnetic bearings for oil-free
operation, integral variable-frequency drives, and
high-speed direct drive technology. The high
efficiency compressor is matched with highly efficient
heat exchanges to make an impressive chiller. The
control system is based on Daikin’s MicroTech II
family to provide the optimum chiller control system.
We invite you to look at how the features and benefits
compare to older compressor technologies.

Benefit Summary

• Highest Efficiency- in its size range; as low as

0.328 kW/ton.

•

Increased Reliability This frictionless

magnetic bearing design needs no oil. With no
oil to coat the heat transfer surfaces, a gain in
heat exchanger efficiency can be realized.

•

Ultra Quiet A compressor sound level as low

as 76 dBA, with virtually no structure-borne

vibration, eliminates the need for expensive sound
attenuation accessories.

• Sustainable Performance All oil-lubricated

chillers will deposit oil on heat transfer surfaces
and eventually lose some efficiency. Since the
Magnitude chiller uses a positive pressure
refrigerant and has no oil, its industry-leading
efficiency is maintained for the life of the
chiller. Additionally, over time negative
pressure chillers may draw air and moisture into
the system, which can significantly increase
energy consumption.

•

Smart refrigerant choice The compressor is

optimized for HFC 134a, the positive pressure
refrigerant with no phase-out schedule and no
ozone depletion.

•

Smart controls. The compressor is self-

correcting and incorporates a system of
sophisticated self-diagnostics, monitoring and
controls.
event of a power failure, the compressor motor
acts as a generator, providing power for the
bearing control system during coast down. It
also has a system to gently de-levitate the shaft.

Safe power interruption In the

4 Catalog 602-2

Oil-Free Design Benefits

Totally Oil-Free Operation = Greater Efficiency

With no oil to coat the heat tr ansfer surfaces, a gain in
heat exchanger efficiency can be realized.

No Oil Loss = Sustainable Performance

With no possibility of oil loss at light loads or due to worn
seals, the original energy saving efficiency can be
maintained for the life of the chiller.

No Oil Handling Equipment = Greater Reliability

With magnetic bearings operating in a magnetic electrical
field instead of oil-lubricated bearings, the oil handling
equipment is removed. No need for:

oil pumps

oil reservoi rs

oil coolers

oil filters

water r egulating valves

oil relief valves

oil system controls, starter, piping, heaters, etc...

that are needed to maintain oil quality. These devices can
be a fault source in tr aditional chillers, and removing
them significantly increases unit and system reliability.

No Oil System = Reduced Maintenance Costs

With oil removed from the system, oil samples, oil
changes, oil system maintenance, oil f ilter changes and
leaks are eliminated.

The Compressor Technology

The advanced, magnetic bearing, permanent
magnet synchronous motor technology used in
Magnitude chillers offers many owner benefits.

Figure 1, Compressor Cutaway

Magnetic Bearings and

11..

Bearing Sensors

Permanent Magnet

22..

Synchronous Motor

Touchdown Bearings

33..

Shaft and Impellers

44..

Compressor Cooling

55..

VFD

66..

VFD = Ultra-Low IPLV

The well-proven energy performance advantages
of large central plant type variable-speed
centrifugal chiller compressors now benefit
mainstream, middle-market applications through
the use of high-speed, centrifugal compression
with integral variable-speed drive.

The compressor speed reduces as the condensing
temperature and/or cooling load reduces,
optimizing energy performance through the entire
operating range. Movable inlet guide vanes
redirect gas flow into the first stage impeller
during low loads, after the compressor has reached
minimum speed.

Ultra-Smart Controls

The chillers utilize digital control electronics to
proactively manage unit operation and providing
control of external chilled water and cooling tower
pumps.

Greater Reliability

Oil Handling Equipment Removed

With magnetic bearings operating in a magnetic
electrical field instead of oil lubricated ball or roller
friction type bearings as the basis of design, the oil
handling equipment is removed.

Catalog 602-2 5

Exceptional Control

User-Friendly Touch Screen Panel

Every Magnitude chiller is provided with the user­friendly operator interface touch screen panel
mounted on the moveable positioning arm for easy
viewing and operation.

View chiller status, clear faults and change
parameters by merely touching the screen.

For added convenience, the unit operating and
maintenance manual is viewable on the screen and
can be downloaded and printed via the USB port
located in the control panel.

Low Operating Costs

Shrink Your Utility Costs with Ultra Efficient Part-Load Performance

The Magnitude chiller Integrated
Part Load Value (IPLV) is as low
as 0.328 kW/Ton. Compare this
with most screw compressor
chillers - approximately 0.575
kW/Ton. There is a potential for
up to 40% energy savings at part
load compared to other chillers.

Virtually Eliminate Maintenance Costs

Oi

l samples, oil change-outs, oil
system maintenance, oil filter
changes are eliminated. The
bearing system, shafting and
impellers are shown here.

Flexible BAS Interface Modules

Every Magnitude chiller with MicroTech®II
controls and the Open Choices™ feature can be
provided with L
Modbus communications modules for an easy, low
cost connection to the building automation system of
your choice. Expensive and complex interface
gateways are not required.

Modules can also be easily retrofitted after
installation.

ONWORKS, BACnet, or

Variable Frequency Drives

Compressor unloading and subsequent chiller
capacity reduction is accomplished by a
compressor-mounted variable frequency drive. It
operates in conjunction with the inlet guide vanes.

The VFDs are a key factor in providing the
tremendous energy savings at part load operation.

Seismic Certification Option

WMC units are OSHPD Pre-Approved and so
labeled. (California only).

WMC units are certified to IBC 2009

nvironmental Responsibility

E

Long Term Refrigerant Solution

The Magnitude chiller uses R-134a refrigerant,
which does not have a phase-out date and does not
attack the ozone layer.

Ultra Quiet Sound Levels

The Magnitude chiller is the quietest chiller in the
industry for its size range. It is perfect for sound
sensitive applications. See ratings on page 17.

The best way to appreciate how quiet these units are
is to hear one operate. It is important to compare the
sound data in this catalog to other offerings.
Remember that a sound pressure difference of only
two to three dBA is a very noticeable difference. A
number of owners have asked for a large indicating
light on the unit so they can tell when it’s on!

6 Catalog 602-2

Extremely Low Vibration Levels

As a result of the magnetic bearings and low
inertia design, the compressor vibration levels are
extremely low, minimizing vibration that could be
transmitted to the structure.

The unit is shipped with rubber mounting pads and
spring vibration isolators are not required.

Unit Control Features

Magnitude Chillers Feature MicroTech

It is only fitting that the world’s most
revolutionary chiller design be matched with
the advanced Daikin MicroTech control
technology to give you the ultimate in chiller
performance and control. The control includes
many energy-saving features and interface

enhancements not found in any other unit controller
system on the market today. MicroTech controller's
innovative design will help keep your chiller
running efficiently . . . day in, day out, for years to
come.

Control Architecture

The Magnitude chiller takes advantage of Daikin
International’s 30 years of experience in designing
and manufacturing the highly regarded WDC line of

conventional, dual centrifugal compressor chillers.

The operator interface panel is a 15-inch Super
VGA touch-screen, utilizing graphics to provide
clear and concise information on the chiller status,
(see page 9) alarms, trends, and setpoint
adjustment. Should the touch-screen become
inoperable, the unit controller will continue
uninterrupted operation of the chiller.

The controller minds those functions that are
common to the chiller as a whole (pumps, cooling

tower, valves, etc.) and is the interface point for
BAS connection and other control inputs to the
chiller, as well as outputs such as operation of the
electronic expansion valve.

The control panel contains a USB port for
downloading the unit’s fault history, major
parameter trends, and the unit operating manual that
is stored in the microprocessor.

Catalog 602-2 7

energy conservation

MicroTech II ® Control Features and Benefits

FEATURE BENEFIT

Easy integration into Building Automation System

(BAS) via the exclusive Open Choice™

communication module

Easy to read, adjustable, 15 inch, Super VGA color

touch screen operator interface

Historic trend data-downloadable

Precise ± 0.2 °F chilled water control

Proactive pre-shutdown correction of “unusual

conditions” allows chiller to stay online

Automatic control of chilled water and condenser

water pumps

Controls up to four stages of tower fans and
modulation of tower fan and/or bypass valve

Twenty-five previous alarm descriptions are stored

in memory

Up to four WMC chillers* can be interconnected

for coordinated operation

Designed with the Operator in Mind

Reliable, economic use of any chiller depends
largely on an easy operator interface. That’s why
operation simplicity was one of the main
considerations in the development of the
MicroTech controller. The operator’s interface
with the chiller is through a 15-inch, Super VGA
color monitor with touch-screen capability. The
operator can clearly see the entire chiller
graphically displayed with the key operating
parameters viewable on the screen. Pressing a
single on-screen button will access the set screens
where setpoints can be reviewed and changed, if
necessary. Other screens, such as alarm history,
are easily accessed through touch screen buttons.
See the following page for some typical screens.

By constantly monitoring chiller status, the
MicroTech controller will automatically take
proactive measures to relieve abnormal conditions
or shut the unit down if a fault occurs. For
example, if a problem occurs in the cooling tower
and discharge pressure starts to rise, the controller
will automatically hold the load point and activate
an alarm signal. A further rise in pressure will
initiate compressor unloading in an effort to
maintain the setpoint pressure and stay online. If
the pressure continues to rise, the unit will shut off
at the cutout pressure setting.

Designer can select any BAS supplier using standard
open protocols and know the MicroTech II control will

interface with it.

Provides stability in chilled water system

Valuable asset for trouble shooting

Simplifies multi-chiller installations

Operators can observe chiller operation and easily

select various data screens and change setpoints

Water temperatures, refrigerant pressures, and motor

load plots can provide valuable information for

Activates alarm and modifies chiller operation to

provide maximum possible cooling

Integrated lead/lag and automatic engagement of

backup pump

Optimum integrated, efficient, control of cooling tower

water based on system conditions

The MicroTech controller's memory retains a
record of faults and the time/date stamp. The
controller's memory (no batteries required) can
retain and display the cause of the current fault and
the last twenty-five fault conditions. This method
for retaining the fault is extremely useful for
trouble shooting and maintaining an accurate
record of unit performance and history. The
controller features a two-level password security
system to provide protection against unauthorized
use.

The Home Screen shown in Figure 2 is usually
used as the primary viewing screen. It provides real
time data on unit status, water temperatures, chilled
water set point and motor amp draw. In other
words, it very clearly answers the vital question: is
the chiller doing what it is supposed to do?

*Note: WMC B-vintage chillers may not be interconnected with any

other model, including WMC A-vintage models. See IM 1029­2 for more information.

8 Catalog 602-2

Figure 2, MicroTech II Home Screen

an alarm occurs, a red button appears on the

If
screen (a remote signal is also available). Pressing
this button immediately accesses the Active Fault
Screen that gives complete fault information. The
problem can be fixed and the fault can be quickly
and easily cleared at this point.

Changing Setpoints

The mystery of changing set points is a thing of
the past. Look at how easy the job becomes with
the Daikin MicroTech. For example, to change the
chilled water set point, press SET from any screen,
then press the WATER button and this screen
appears, press button #1, Leaving Water
Temperature, and you are ready to input a new
value. Selected setpoints can also be changed by
the BAS.

Fi

gure 3, MicroTech II Setpoints Screen

The Daikin MicroTech controller can record and
plot water temperatures, refrigerant pressures, and
motor load in order to trend performance. These
values can also be downloaded through a
convenient USB port in the control panel, and
exported into a spreadsheet for further evaluation
and record purposes.

Figure 4, Trend Logging Screen

MicroTech Controller Increases Chiller Operating Economy

Many standard features have been incorporated
into MicroTech control in order to maintain the
operating economy of Daikin centrifugal chillers.
In addition to replacing normal relay logic
circuits, we’ve enhanced the controller's energy
saving capabilities with the following features:

• Direct control of water pumps. Optically

isolated, digital output relays provide automatic
lead-lag of the evaporator and condenser
pumps, permitting pump operation only when
r

equired.

• User-programmable compressor soft loading.

Prevents excessive power draw during pull
down from high unoccupied chilled water
temperature conditions.

• Chilled-water reset. Accomplished directly on

he unit by resetting the leaving water

t
temperature based on the return water
temperature. A remote 4-20 ma or 1-5 VDC
BAS signal can also be used to reset th

eaving water. Raising the chilled water

Trend Logging

Ever wonder how your chiller performed last
week? Were you holding the required chilled water
temperature? What kind of cooling load did the
chiller have?

Catalog 602-2 9

l
setpoint during periods of light loads
dramatically reduces electrical consumption.

e

• Demand limit control. Maximum motor current

draw can be set on the panel, or can be adjusted
from a remote 4-20 ma or 1-5 VDC BAS
signal. This feature controls maximum demand
charges during high usage periods.

• Condenser water temperature control. Capable

of four stages of tower fan control plus an
optional analog control of either a three-way
tower-bypass valve or variable speed tower-fan
motor. Stages are controlled from condenser­water temperature. The three-way valve can be
controlled to a different water temperature or
track the current tower stage. This allows
optimum chilled water plant performance
based upon specific job requirements.

• Staging Options (Multiple Chiller

Installations). Lead-lag and load-balance: the
MicroTech II controller is capable of
compressor lead-lag decisions and balancing
compressor loads between two compressors on
one unit or two separate Magnitude chillers,
using defaults or operator defined staging. For
example, in the 30 to 60 percent load segment,
one compressor running on each of two chillers
will provide better efficiency than two
compressors running on one chiller.

• Plotting Historic Trends. Past operation of the

chiller can be plotted as trend lines and even
downloaded to spread sheets for evaluation - a
valuable tool for optimizing efficiency.

Versatile Communications Capabilities Give You Even More Control

For complete flexibility there are four ways to
interface with the MicroTech II controller:

1. Direct entry and readout locally at the operator

interface panel on the unit.

2. Direct entry as above plus digital and analog

input/output signals for certain functions such
as: enable run input, alarm signal output, 4-20
ma or 0-5 VDC inputs for chilled water reset
and load limiting, pump and tower fan control,
analog output for variable speed fan and tower
bypass.

3. Interface with BACnet, L

ONWORKS, or

Modbus.

4. Direct communication between three

Magnitude WMC chillers (not compatible with
WME models).

Building Automation Systems

All MicroTech II controllers are capable of
communications providing seamless integration
and comprehensive monitoring, control, and two­way data exchange with industry standard
protocols Lon Talk

Open Choice Benefits

• Easy to integrate into your building automation

system supplier of choice

• Factory- or field-installed communications

module

• Provides efficient equipment operation

• Integrated control logic for factory options

• Easy-to-use local user interface

• Owner/designer can select the BAS that best

meets building requirements

• Comprehensive data exchange

®

or BACnet or Modbus.

10 Catalog 602-2

Capacity Limit Output

R

Cond EWT

R

Evap Water Pump Status

R

Chiller Enable

W

Cond LWT

R

Run Enabled

R

Chiller Local/Remote

R

Cond Refrigerant Pressure

R

Liquid Line Refrigerant Temp

R

Chiller Mode Setpoint

W

Cond Water Pump Status

R

Minimum Send Time

R

Chiller Status

R

Evap Flow Switch Status

R

Cool Setpoint

W

Compressor Percent RLA

R

Evap LWT for Compressor

R

Default Values

W

Compressor Select

W

Evap Refrigerant Pressure

R

Actual Capacity

R

BACnet MS/TP

LonTalk (FTT-10A)

BACnet IP

Modbus RTU

BACnet Ethernet

Figure 5, Sample System Architecture

Table 1, Typical Data Point Availability

Typical Data Points

Capacity Limit Setpoint W Cond Flow Switch Status R Pump Select W

Chiller Limited R Cond Pump Run Hours R Liquid Line Refrigerant Pressure R

Chiller Mode Output R Cond Sat. Refrigerant Temp R Maximum Send Time W

Chiller On/Off R Evap EWT R Network Clear Alarm W

Compressor Discharge Temp R Evap LWT for Unit R Current Alarm R

Compressor Run Hours R Evap Pump Run Hours R Active Setpoint R

Compressor Starts R Evap Sat. Refrigerant Temp R Compressor Suction Line Temp R

Notes: Data points available are dependent upon options selected

1

(W = Write, R = Read)

Network Protocol Options

Catalog 602-2 11

Unit Design Features

Variable Frequency Drive

Efficiency: The standard variable frequency drive

is a technology that has been used for decades to
control motor speed on a wide variety of motor­drive applications. When applied to centrifugal
compressor motors, significant gains in part load
performance can be realized. The improvement in
efficiency and reduction of annual energy cost is
maximized when there are long periods of part
load operation, combined with low compressor lift
(lower condenser water temperatures).

The attributes of VFD and the compressor
technology produces one of the industry's most
efficient chiller based on the all-important IPLV
value. See “IPLV/NPLV Defined” on page 14 for
details on the AHRI IPLV efficiency rating.

Starting Inrush: The use of a VFD on centrifugal
chillers also provides an excellent method of
reducing motor starting inrush-even better than
"solid state" starters. Starting current can be
closely controlled since both the frequency and
voltage are regulated. This can be an important
benefit to a building's electrical distribution
system. The low inrush feature, combined with two
one-half size compressors having a staggered start,
is particularly attractive where chillers will be
asked to operate on emergency generators. Since
inrush has much to do with sizing the generators,
much smaller generators can be used.

Optional Harmonic Filter

An optional field-mounted harmonic filter is
available. See page 40 for details.

HFC-134a

Daikin Positive Pressure Design:

• No

• No Vacuum Prevention System

• No Contaminants

HFC-134a operates above atmospheric pressure in
the entire refrigerant circuit and at normal
temperatures. All Daikin centrifugal chillers use a
positive pressure refrigerant, with the following
benefits:

• N

circuit

• No breakdown of motor insulation, refrigerant

or lubricant

• No increase in operating cost due t

d
condensables

Purge

o absorption of impurities into the refrigerant

o

isplacement of heat transfer surface by non-

• No crevice corrosion and tube failure due t

m

oisture in the system

• No annual service expense to maintain a

rebuild purge unit

• No abnormal annual service expense for oil

ilter, and refrigerant replacement

f

• No periodic emissions of refrigerant into the

atmosphere

o

nd

,

Heat Exchangers

Daikin Magnitude chillers are equipped with
high performance heat exchangers. The unique
design greatly increases heat transfer and
reduces unit footprint and refrigerant charge.
Vessels are designed, constructed and tested in
accordance with ASME Section VIII, ASHRAE
Standard 15 requirements and TEMA
recommendations.

T

he replaceable water tubes are internally rifled
and externally enhanced copper, and are
mechanically bonded to steel tube sheets. Standard
tubes are 0.025-inch wall thickness. Consult
factory for other options.

Vessels are available for 1, 2 or 3 pass water flow.
A 3/4" or 1-1/2 thick layer of vinyl/nitrate polymer
evaporator insulation is optional. All seams are
glued to form an effective vapor barrier. Detailed
information on the insulation can be found under
“Physical Data” on page 27.

Pumpdown

Pumpout systems provide a means to collect and
contain the refrigerant charge without loss when
access to internal chiller components is required
for service.

Daikin condensers and evaporators are sized to
hold the entire unit refrigerant charge when not
more than 90% full and at 90°F (32°C) ambient
temperature. They are equipped with valves in
the compressor discharge lines, suction lines, and
in the liquid line. These valves, coupled with the
vessel design, satisfy the stringent requirements
of the U.S. Department of Transportation for
refrigerant shipping containers, as well as ASME
vessel codes. When service is required, the
refrigerant charge can be pumped down into
either the condenser or evaporator by compressor
operation and use of a refrigerant transfer unit.

12 Catalog 602-2

Elimination of the cost and space requirements of
an external pumpout system on most jobs is a
major Daikin advantage.

Electronic Expansion Valve

Controlled refrigerant flow over the entire capacity
range saves energy and dollars. Cooling loads and
condenser water temperatures can change
constantly. On Magnitude chillers, a modern
electronic expansion valve meters refrigerant flow
in direct response to the unit controller input,
which looks at unit kW and lift (discharge minus
suction pressure) to set the valve position. The
controller then balances suction superheat and
liquid subcooling to reach the optimum efficienc y,
regardless of changing load or condensing
temperatures. In doing so, full utilization of
compressor, evaporator, and condenser efficiency
over the entire operating range is achieved.

Flow Switch

All chiller units must be provided with flow
switches for the evaporator and condenser.
Daikin furnishes factory-installed and wired,
thermal dispersion-type flow switches as standard
equipment on Magnitude chillers. This eliminates
the expense of field mounting and wiring
conventional paddle or differential pressure
switches.

e flow switches

Th
prevent the unit
from starting
without sufficient
water flow through
the vessels. They
also serve to shut
down the unit in
the event that
water flow is

interrupted to
guard against evaporator freeze-up or excessive
discharge pressure.

Optional Witness Test

A factory engineer oversees the testing in the
presence of the customer or their designate and
translates the test data onto an easy-to-read
spreadsheet. Tests are run to AHRI tolerances of
capacity and power. 50 Hertz units are tested using
an on-site 50 Hertz generator.

Daikin Factory Service Startup

All Daikin centrifugal chillers are commissioned
by local Daikin Factory Service personnel or by
authorized Daikin startup technicians. This
procedure helps assure that proper starting and
checkout procedures are employed and helps speed
up the commissioning process.

Part Load Efficiency

According to ASHRAE, chillers usually spend
99% of their operating hours under part load
conditions and most of this time at less than 60%
of design capacity. One compressor of a dual
chiller operates with the full heat transfer surface
of the entire unit. For example, one 75-ton
compressor on a 150-ton dual chiller utilizes 150
tons of evaporator and condenser surface. This
results in very high unit efficiency and also
increases the compressor’s capacity.
The inclusion of VFDs, as standard, to the dual
compressor chiller can produce astonishing AHRI
Certified IPLVs,
selections can vary from this example.

as low as 0.328 kW/ton. Specific

Compliance with ASHRAE Std. 90.1

With the Magnitude chiller capacity range of 145
to 400 tons, they fall into three ASHRAE Std. 90.1
efficiency groups and revisions.

Additionally, for a higher margin of protection,
normally open auxiliary contacts in the pump
starters can be wired in series with the flow switches
as shown in the Field Wiring Diagram.

Optional Certified Test

A factory engineer oversees the testing, certifies the
accuracy of the computerized results, and translates
the test data onto an easy-to-read spreadsheet. The
tests are run to AHRI tolerance of capacity and
power. 50 Hertz units are tested using an on-site 50
Hertz generator.

Catalog 602-2 13

Table 2, ASHRAE 90.1 Requirements (kW/ton)

Path A

Path B

Load-

Load-

150 Tons

< 300 Tons

300 Tons

600 Tons

DCBA

IPLVorNPLV

12.0

+

45.0

+

42.0

+

01.0

1

=

DCBAIPLVorNPLV 12.0+45.0+42.0+01.0=

Std. 90.1

Capacity

Range

< 150 Tons 0.703 0.669

≥

≥
<

NOTE: Beginning in 2010, the 90.1 efficiency
requirements have been divided into two groups,
designated as Path A and Path B. Path B is a new
category created for units with VFD compressor drives
that by nature have superior part-load efficiencies. WMC

Pre 2010 Starting in 2010

Full

IPLV

Load

0.634 0.596 0.634 0.596 0.639 0.450

0.576 0.549 0.576 0.549 0.600 0.400

Full

IPLV

0.634 0.596

Full

IPLV

0.639 0.450

Magnitude chillers, with their built-in VFDs, fall into

Path B.

The Path B IPLV values for 2010 are about 30 percent
less than the 2007 equivalent values. Also beginning in
2010, the minimum efficiency values are formula derived
instead tabular so that they can take flows and
temperatures other than AHRI standard into account.

AHRI Certification

Daikin has an on-going commitment to supply
chillers that perform as specified. To this extent,
Daikin centrifugal chillers are part of the AHRI
Certification Program. On-going performance
verification of chiller capacity and power input
plus AHRI certified computerized selection
output provide the owner with specified
performance in accordance with the latest version
of AHRI Standard 550/590.

All c

hillers that fall within the scope of the
certification program have an AHRI certification
label at no cost to the owner. Equipment covered
by the AHRI certification program includes all
water-cooled centrifugal and screw water chilling
packages rated up to 2500 tons (8800 kW) at AHRI
standard rating conditions, hermetic or open drive,
with electric driven motor not exceeding 5000
volts, and cooling water (not glycol).

Published certified ratings verified through testing
by AHRI include:

and performance tolerances of all units that fall
within the application rating conditions.

Leaving chilled water temp.: 40°F to 48°F (44°F
standard)

Entering condenser water temp.: 60°F to 95°F

Leaving chilled water temp.: 44°F

Evap. waterside field fouling allowance: 0.0001

Chilled water flow rate: 2.4 gpm/ton

Entering condenser water temp.: 85°F

Condenser waterside field fouling allowance:

0.00025

Condenser water flow rate: 3.0 gpm/ton

IPLV/NPLV Defined

Part load performance can be presented in terms of
Integrated Part Load Value (IPLV), which is based
on AHRI standard rating conditions (listed above),
or Non-Standard Part Load Values (NPLV), which
is based on specified or job site conditions. IPLV
and NPLV are based on the following weighting
equation from AHRI 550/590:

Us

ing kW/ton:

Wher

e:

A = kW/ton at 100%
B = kW/ton at 75%
C = kW/ton at 50%
D = kW/ton at 25%

Or

, using COP values:

Where:

A = COP at 100%
B = COP at 75%
C = COP at 50%
D = COP at 25%

The AHRI Standard 550/590 for Centrifugal or
Screw Water-Chilling Packages and associated
manuals define certification and testing procedures

14 Catalog 602-2

• Capacity, tons (kW)

• Power, kW/ton (COP)

• Pressure drops, ft. of water (kPa)

• Integrated Part Load Value (IPLV) or Non-

Standard Part Load Value (NPLV)

% . ( . % )

%

Tolerance x FL

DTFLx FL

= − +











10 5 0 07

1500

Weighting

The percent of annual hours of operation at the
four load points are as follows:

ton (kW/ton), and heat balance is:

100% Load at 1%

75% Load at 42%

50% Load at 45%

25% Load at 12%

Note that the vast majority of hours are at the operating
range where dual compressor chillers excel.

Tolerances

The AHRI test tolerance, per AHRI Standard
550/590-98, for capacity (tons), power input per

Where:
FL = Full Load
DTFL = Chilled Water Delta-T at Full Load
This formula results in a ±5% tolerance on tons
and kW/ton at the 100% load point and AHRI
conditions.

Catalog 602-2 15

MODEL CODE EXAMPLE:

Packaged Water Cooled

M = Magnetic

Centrifugal Compressor Model

Unit Model Code

Motor/Voltage Code

Evaporator Shell Description

Tube Count Code

Tube Type Code

Number of Passes (1, 2, 3)

Water Inlet Location (R = Right Inlet; L = Left Inlet)

Connection Type

Condenser Shell Description [Diameter (in.), Length (ft.)]

Tube Count Code

Tube Type Code

Tube Count Code (Heat Recovery Condenser)

Tube Type Code (Heat Recovery Condenser)

Number of Passes (1, 2, 3)

Wate

r Inlet Location (R = Right Inlet; L = Left Inlet)

Connection Type

Number of Passes (Heat Recovery Condenser)

Water Inlet Location (Heat Recovery Condenser)

Motor Manufacturer

N/A

N/A

Chiller Identification

Magnitude centrifugal chillers are selected by computer and identified by their components on the selection
printout as a Model #. The unit model code is as follows:

Figure 6, Chiller Identification

C
O
M
P
R
E
S
S

Vintage/Single Refrigerant Circuit

O
R

E
V

[Diameter (in.), Length (ft.)]

A
P
O
R
A
T
O
R

W M C - 150D - BS - 13R / E2212 - B E - 2 RA / C2012 - B L Y Y - 2 R A Y Y Y R 134

C

O

N

D

E

N

S

E

R

Connection Type (Heat Recovery Condenser)

Refrigeration Type (134 = HFC-134a)

16 Catalog 602-2

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

75

78.0

Octave Band

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

100

37.5

49.5

56.0

65.0

72.0

70.0

66.5

64.0

75.5

75

39.5

48.5

55.0

61.0

69.5

64.5

64.0

60.0

72.5

25

36.0

48.5

54.5

57.5

65.5

60.5

57.5

52.0

68.0

Octave Band

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

100

37.5

51.5

59.5

72.0

75.0

72.5

76.5

75.0

81.5

75

37.0

50.5

62.5

66.5

70.0

69.5

74.0

70.5

78.0

50

75.0

25

37.5

49.0

59.0

63.0

65.0

66.0

69.5

64.0

73.5

Octave Band

63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz

100

83.5

25

44.5

51.5

61.0

64.5

67.5

73.0

73.0

62.0

77.0

50

Sound Data

The following sound pressure ratings are for
measurements one meter from the unit and in
accordance with ANSI/AHRI Standard 575. The
ratings are for the various part loads shown and at

lowering of sound level as the units unload.
Ratings are “A” weighted measured at one-meter
from the unit. The 25 percent values are with one
compressor running.

the center bands. Note that there is a considerable

Table 3, WMC 145S Sound Pressure (dB), 50/60 Hz

Percent

Load

100

50
25

37.0 50.0 61.0 67.0 74.5 71.5 73.0 75.5

39.5 49.0 60.5 66.0 72.5 69.0 71.0 72.0

37.0 47.5 60.0 64.5 66.5 68.0 69.5 68.0

38.0 50.0 58.0 66.5 68.5 70.0 69.5 70.0

Octave Band

Table 4, WMC 145D/150D, Sound Pressure (dB), 50/60 Hz

Percent

Load

50

35.5 48.0 54.5 58.0 66.0 61.0 58.5 53.5

Table 5, WMC 250D/290D, Sound Pressure (dB), 50/60 Hz

Percent

Load

A-Weighted

80.5

75.0

76.5

A-Weighted

68.5

A-Weighted

37.5 50.0 60.0 65.0 65.5 66.0 71.5 66.0

Table 6, WMC 400D, Sound Pressure (dB), 50/60 Hz

Percent

Load

46.0 55.5 65.5 70.5 74.5 76.0 80.0 74.5

75
50

45.5 55.5 65.5 69.5 73.5 76.5 79.0 72.5

45.0 54.5 64.0 69.0 71.0 74.5 77.5 70.0

One-Third Octave Band

Table 7, WMC 145S, One-Third Octave Band Sound Ratings

Percent

Load

100

75

25

50 Hz 63 Hz 80 Hz 100 Hz 125 Hz 160 Hz 200 Hz 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz

33.5 32.0 30.5 38.0 46.5 46.5 49.0 59.0 56.0 60.5 63.0 63.0 69.5

34.0 36.0 33.0 39.0 45.0 45.5 49.5 58.5 54.5 58.5 60.0 63.5 71.0

31.5 33.5 31.5 37.5 44.5 43.5 48.0 58.5 54.0 53.0 57.0 63.5 58.0

32.0 32.5 34.5 37.0 47.0 46.5 49.5 55.5 53.0 55.0 59.0 65.0 59.5

Table 7, continued

Percent

Load

1 kHz 1.25 kHz 1.6 kHz 2 kHz 2.5 kHz 3.15 kHz 4 kHz 5 kHz 6.3 kHz 8 kHz 10 kHz 12.5 kHz

100

75

50

25

64.0 72.5 66.0 67.5 66.5 66.5 68.0 69.5 72.0 71.0 69.5 67.5

64.0 65.5 64.5 65.5 63.0 64.0 66.0 68.0 69.5 66.5 64.5 62.0

60.5 64.0 63.5 64.5 61.0 61.5 65.5 65.5 65.5 62.5 60.0 58.5

62.5 66.5 65.0 66.5 64.0 63.5 65.0 66.0 67.0 64.5 62.5 60.0

Octave Band

Octave Band

A-Weighted

82.5

81.0

A- Weighted

80.5

78.0

75.0

76.5

Catalog 602-2 17

Load

Octave Band

50 Hz

63 Hz

80 Hz

100 Hz

125 Hz

160 Hz

200 Hz

250 Hz

315 Hz

400 Hz

500 Hz

630 Hz

800 Hz

100

32.5

32.0

34.0

38.0

48.0

42.0

46.0

53.5

51.0

53.0

62.5

60.5

61.0

75

32.0

32.0

37.5

37.0

47.0

41.0

45.5

52.5

50.0

53.5

58.0

55.5

62.5

50

26.5

30.5

33.0

36.5

47.0

39.0

43.5

52.5

48.5

52.0

53.5

54.5

62.0

25

100

70.5

65.0

68.0

62.0

63.0

62.5

61.0

61.5

60.0

59.0

59.0

58.0

75.5

Load

Octave Band

50 Hz

63 Hz

80 Hz

100 Hz

125 Hz

160 Hz

200 Hz

250 Hz

315 Hz

400 Hz

500 Hz

630 Hz

800 Hz

100

32.0

32.5

33.0

38.0

49.0

47.5

50.5

56.0

56.0

70.0

65.5

65.0

71.0

75

32.0

32.5

32.5

37.5

48.0

46.0

48.5

54.0

61.5

60.5

58.0

64.0

63.0

50

33.0

33.0

32.0

37.0

48.5

43.5

47.5

53.0

58.5

52.5

57.5

64.0

57.5

25

Load

Octave Band

Weighted

1 kHz

1.25 kHz

1.6 kHz

2 kHz

2.5 kHz

3.15 kHz

4 kHz

5 kHz

6.3 kHz

8 kHz

10 kHz

12.5 kHz

100

67.0

71.0

68.0

67.0

68.5

69.5

71.5

73.0

71.0

72.0

67.0

64.5

81.5

75

66.0

65.5

64.5

64.5

64.5

67.5

69.5

70.5

66.5

67.0

63.5

60.5

78.0

50

75.0

25

58.5

62.0

60.5

61.0

62.0

63.5

66.0

64.5

59.5

61.0

55.5

54.4

73.5

Octave Band

75

Octave Band

Table 8, WMC 145D/150D, One-Third Octave Band Sound Ratings

Percent

31.5 30.5 32.0 36.5 47.5 40.5 43.5 52.5 49.5 50.5 52.5 54.5 57.5

Table 8, continued

Percent

Load

1 kHz 1.25 kHz 1.6 kHz 2 kHz 2.5 kHz 3.15 kHz 4 kHz 5 kHz 6.3 kHz 8 kHz 10 kHz 12.5 kHz

Octave Band

A- Weighted

75
50
25

67.5 61.5 59.5 58.5 60.5 59.0 60.0 58.0 55.0 54.0 56.5 57.5

57.5 62.5 57.0 55.5 55.5 54.5 55.5 50.0 48.0 45.5 51.0 50.5

63.5 58.0 56.5 56.0 54.0 53.5 54.0 49.5 48.0 45.0 47.5 48.0

Table 9, WMC 250D/290D, One-Third Octave Band Sound Ratings

Percent

33.0 33.0 31.5 35.5 48.0 42.0 45.5 56.0 56.0 49.5 58.5 61.0 59.0

Table 9, continued

Percent

60.0 63.0 60.5 61.0 62.0 65.0 68.5 66.5 62.0 62.0 59.0 57.5

Table 10, WMC 400D, One-Third Octave Band Sound Ratings

Percent

Load

100

50
25

50 Hz 63 Hz 80 Hz 100 Hz 125 Hz 160 Hz 200 Hz 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz

36.0 42.5 42.5 45.5 52.0 52.0 56.0 60.0 63.5 64.5 65.5 67.0 69.5

35.5 42.5 42.0 45.5 51.5 52.0 55.5 60.0 63.5 64.0 65.0 65.0 70.5

34.0 41.5 42.0 43.5 49.0 52.5 56.0 61.5 58.5 63.5 65.0 64.0 66.0

34.0 41.5 41.0 41.5 45.5 50.0 57.0 55.5 55.5 58.5 59.0 61.0 62.0

72.5

68.5

68.0

A-

Table 11, continued

Percent Load

100

75
50
25

1 kHz 1.25 kHz 1.6 kHz 2 kHz 2.5 kHz 3.15 kHz 4 kHz 5 kHz 6.3 kHz 8 kHz 10 kHz 12.5 kHz

71.0 68.5 70.0 72.0 72.0 72.0 75.0 77.5 71.5 69.5 66.0 63.0

68.0 67.5 69.5 71.0 73.5 72.0 74.5 75.5 69.5 68.0 65.0 61.5

65.5 66.5 68.0 69.0 71.5 70.0 73.0 74.5 67.0 65.0 63.5 57.5

62.0 63.5 65.5 71.5 64.5 66.0 71.0 64.0 59.5 57.0 53.5 49.0

18 Catalog 602-2

A-Weighted

83.5

82.5

81.0

77.0

6.2
157

14.7
375

112.1
2846

101.6
2579

128.3
3259

5.3

TYP.BOTH

ENDS

133

29.3

CONDENSER

RELIEF

VALVES

744

58.3

EVAPORATOR

RELIEFVALVE

1480

134.7

(UNITOVERALL)

3421

18.0
458

11.1
283

17.1
435

FRONT

END

BOX

UNIT

CTRL

BOX

EVAPORATOR

CONDENSER

COMPRESSOR

FRONTVIEW

X

Y

5,7,8

3

3

3

3

114.8
2916

57.5

1460

22.5

EVAPORATOR

RELIEFVALVE

571

22.6

SUCTION

RELIEF

VALVE

574

26.9

CONDENSER

RELIEF

VALVES

684

TOPVIEW

RB

RF

LF

LB

Z

X

4

3

3,4

3,4

5,13

5,13,14

5,7,8

4.0

102

26.5
673

34.5
876

10.0
254

32.7
8

31

37.8
960

44.3

(OVERALLWIDTH)

1126

16.8
425

44.8

1137

65.9

TOP UNIT

CTRL BOX

1675

74.3

TOP FRONT

ENDBOX

1887

81.0

TOP

COMPR.

2058

69.8

SUCTION

RELIEF

VALVE

1774

O.I.T.S.

IN

IN

OUT

OUT

RIGHTVIEW

Y

Z

5

5

5,10,12

5

4

5

5

5.6

INLET

142

5.6

OUTLET

142

8.0

NOM.

TYP.(2X)

203

EVAPORATORHEAD2-PASS

VICTAULIC150 PSI WATERSIDE

C

L

C

L

OUT

IN

7,8

13.0

INLET

330

19.0

OUTLET

483

5.6

OUTLET

143

5.6

INLET

143

6.0

NOM.

TYP.(2X)

152

CONDENSERHEAD2-PASS

VICTAULIC150 PSI WATERSIDE

C

L

C

L

IN

OUT

7,8

13.0

INLET/

OUTLET

330

11.3
287

114.8
2916

34.5
876

1.13

MTG. HOLE

(TYP.)

29

6.3

160

8.9

225

16.0
407

31.9
809

34.0
864

9.0

230

14.0
357

13.8
352

8.0
203

8.0

203

MOUNTING

FOOT(TYP.)

ELECTRICAL

CONNECTIONS

FRONTEND BOX

UNITCTRL BOX

ALLDIMENSIONSAREIN DECMAL

INCHESAND [MILLIMATERS]

SEEDRAWING332835001FORNOTES

RB

LB

LF

RF

5,13,14

5,13

WMC145SBS

332834001 00 NONE

DRAWINGNUMBER REV. SCALE

Dimensions

Figure 7, WMC 145S (B-vintage), 2-Pass, Right-hand (See page 26 for notes.)

Catalog 602-2 19

7.6
194

6.2

157

9.5

241

101.6
2579

112.1
2846

5.3

TYPICAL

BOTH ENDS

133

128.3
3259

29.2

CONDENSER

RELIEF

VALVES

742

58.6

EVAPORATOR

RELIEF

VALVES

1487

134.7

(UNITOVERALL)

3421

17.1
435

11.1
283

UNIT
CTRL

BOX

FRONT

END

BOX

CONDENSER

EVAPORATOR

FRONTVIEW

#1 #2

3

3

3

3

5

5,7,8

Y

X

114.8
2916

15.4
391

46.0

1168

22.6

SUCTION

RELIEF

VALVE

574

25.3

EVAPORATOR

RELIEF

VALVE

643

26.3

CONDENSER

RELIEF

VALVES

667

TOPVIEW

4

4

3,4

3,4

5,13,14

5,13

RB

RF

LF

LB

5,7,8

3

X

Z

34.5
876

26.5

673

10.0
254

44.3

(OVERALLWIDTH)

1126

37.8
960

69.8

SUCTION

RELIEF

VALVES

1774

74.3

TOP FRONT

ENDBOX

1887

81.1

TOP

COMPR.

2060

4.0

102

44.8
1137

16.8
425

66.1

TOP UNIT

CTRLBOX

1678

32.7
831

IN

RIGHTVIEW

IN

OUT

5,10,12

5

5

5

5

4

OUT

Y

Z

5.6

OUTLET

143

5.6

INLET

143

6.0

NOM.

TYP.(2X)

152

CONDENSERHEAD 2-PASS

VICTAULIC150PSI WATERSIDE

OUT

IN

7,8

13.0

INLET/

OUTLET

330

5.6

142

5.6

142

8.0

NOM.

TYP.(2X)

203

EVAPORATORHEAD2-PASS
VICTAULIC150PSI WATERSIDE

OUT

IN

7,8

13.0

INLET

330

19.0

OUTLET

483

114.8
2916

34.5
876

8.0

203

8.0

203

11.3
287

14.0
357

34.0
864

38.6
981

9.1
232

16.0
407

6.3
160

9.0
230

1.13

MTG.HOLE

(TYP.)

29

13.8
352

FRONTENDBOX

UNITCTRL BOX

MOUNTING

FOOT(TYP.)

ELECTRICAL

CONNECTIONS

ALLDIMENSIONSAREIN DECIMAL

INCHESAND [MILLIMETERS]

SEEDRAWING 332835001 FORNOTES

TOPVIEW

LB

LF

RF

RB

5,13,14

5,13

WMC145DBS

332834101 00 NONE

DRAWINGNUMBER REV. SCALE

Figure 8, WMC 145D (B-vintage), 2-Pass, Right-hand (See page 26 for notes)

20 Catalog 602-2