VFD-Motor Package INSIGHT
Lenntech
info@lenntech.com Tel. +31-152-610-900
www.lenntech.com Fax. +31-152-616-289
Overview
RTD Temperature Probe
Marley offers a complete VFD and motor upgrade
aftermarket package for cooling towers that can
significantly reduce energy costs compared to single
or two-speed starters. This package provides a singlesource solution, it’s easy to purchase and has a longer
warranty than individually purchased components.
Primary Benefits
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ignificantCostSavings–TheVFDpackage
S
can lower operating costs as much as 30%
compared to a two-speed motor system, or 70%
compared to a single-speed motor system, while
also qualifying for state and utility rebates in some
regions
EaseofPurchase–Marleywillassistby
identifying both mechanical and electrical towerby
components required to make your single
purchase order a smooth experience
Support/Warranty–Approvedandsupported
Marley and backed with a 3-year warranty that is
twice the length of many VFD manufacturers
Benefit Detail
Cost Savings:
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NEMA Premium Efficiency Motor
FIVE YEAR AVERAGE ENERGY COST*
$300,000
$200,000
nergyCosts–upto30%savingsvstwo-speed
E
or 70% vs single-speed*
ProcessCosts–VFDsmaintaintightercoldwater
set-point temperature control than thermostats to
minimize your process cost
Rebates–Multipleutilitiesproviderebatesof
up to 50% of the drive cost as an energy saving
incentive
Payback–Thepaybackconsideringthetotalcost
savings associated with the VFD package can be
aslowastwoyearsorless—useMarley’sUPDATE
program to calculate your savings today!
more
VFD
$100,000
MARLEY
SINGLE
TWO
SPEED MOTOR SPEED MOTOR VFD SYSTEM
Reducing Fan Speed 20%
Reduces Fan Horsepower 50%
* Based on UPDATE selection for a three-cell NC8405TAN with 40hp motor per
cell running 24/7 for 5 years. Total water flow over the tower is 4500 GPM. Cost is
$0.10 per kWh with an assumed annual interest rate of 3%. Cold water set point is
75°F, with an average wet-bulb temperature of 50.7°F, (average seasonal value for
Cincinnati, OH).
VFD-Motor Package INSIGHT
Ease of Purchase:
• Single-sourcesuppliervsmultiplepurchaseorders
• Coolingtowerspecificcomponentsidentified
by Marley
• MarleyOEMqualityandsupport
• CertifiedVFDstartupassistancefromABB
Marley Support and Enhanced Warranty:
• ExtensiveServiceRecorddatabasetoidentify
needs
• Three-yearmaterial-onlywarrantythatcoversthe
entire package
• AdditionalVFDwarrantycoveragewithcertified
startup assistance—material, labor and travel for
VFD repair or replacement included
• Applicationandtroubleshootingassistancefrom
experiencedMarleyControlsteam
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TYPICAL VFD
COMPONENTS
SOLD SEPARATELY SOLD SEPARATELY
andorAutooperationallowsoperatordirect
H
control of motor speed
Softstartofmotor—enableslesswearto
mechanical equipment and less noise than using
across-the-line starters
DV/DToutputfilteroptionisavailableforlong
lead lengths between VFD and fan motor
Tripless-designdriveeliminatesmostnuisance
faults (under-voltage, over-voltage, flying start,
downdraft back drive) keeping the tower running
Reducedfanspeedsextendmotorbearinglife
and pulls less airborne contaminants into the
tower, minimizing maintenance shutdowns—
overall sound levels of the tower are also reduced
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tandalonesystemmatched
S
external controller required—status indicators and
withRTD:No
keypad display provide easy tower
control
CustomerBMScontrolsspeed
theBuildingManagementSystem
ofVFD:Let
process temperature and control
the VFD
monitorthe
-4-20mA,0-10VDCanalog
signals
-ModbusRTU,JohnsonControls
speed
FLN(p1)andBACnet(MS/T)
N2,Siemens
communications
fieldbus
Features and Options
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LListed
U
PWMdrivewithIGBTswitching
bypass design
andintegrated
NEMA12indoororNEMA
208through575VACpower choices
3Routdoorenclosure
5%lineimpedancestandard
Maincircuitbreakerdisconnect
lock-out tag-out padlocks
withprovisionsfor
SwitchtoisolateVFDfrom
servicing
voltagesupplywhen
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Lenntech
info@lenntech.com Tel. +31-152-610-900
www.lenntech.com Fax. +31-152-616-289
MARLEY
VFD SYSTEM
Methods of Operation
pto150hppackageincludestheMarleyCooling
U
Tower Duty Motor
200hpandhigherincludesaNEMAPremium
Efficiencysingle-speedmotor
Special Design Considerations
24
12
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Application Range
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WARRANTY
36
MONTHS
Benefit Detail
In the interest of technological progress,
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| Printedmaterial
all products are subject to design and/or
in USA
change without notice. ©2011 SPX Cooling Technologies,
Inc.
IN-VFDM-10