York ECO R-407C User manual

Packaged Rooftop
Air Conditioning Units
R-407C OPTIMIZED
50 THROUGH 65 TONS
FORM 100.50-EG1 (201)
00406VIP

YORK INTERNATIONAL
2
TABLE OF CONTENTS
PAGE
Nomenclature .........................................................................................................3
Introduction .............................................................................................................4
Physical Data ..........................................................................................................7
ApplicationData......................................................................................................9
Cooling Performance Data....................................................................................12
Fan Performance ..................................................................................................20
Electrical Data.......................................................................................................24
Controls ................................................................................................................26
Power Wiring ........................................................................................................31
Field Control Wiring ..............................................................................................34
General Arrangement Drawing .............................................................................35
Curb Layout Drawing ............................................................................................37
Mechanical Specifications.....................................................................................38
TABLES
1 Physical Data ............................................................................................. 7
2 Cooling Performance Data – 50 Ton Model..............................................12
3 Cooling Performance Data – 55 Ton Model..............................................14
4 Cooling Performance Data – 60 Ton Model..............................................16
5 Cooling Performance Data – 65 Ton Model..............................................18
6 50 Through 65 Ton Supply Fan Data........................................................20
7 50 Through 65 Ton Exhaust Fan Data......................................................21
8 Component Static Pressure Drops........................................................... 22
9 Compressors ...........................................................................................24
10 Supply and Exhaust Fan Motor Electrical Data ........................................25
11 Condenser Fan Motors ............................................................................25
12 Controls and Convenience Outlet............................................................. 25

FORM 100.50-EG1
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YORK INTERNATIONAL
NOMENCLATURE
PAGE
FIGURES
1 Packaged Rooftop Air Conditioning Unit .................................................. 4
2 Single-Point Power Supply Wiring.......................................................... 31
3 Single-Point Power Supply Wiring with Non-Fused Disconnect ............. 32
4 Dual-Point Power Supply Wiring ............................................................ 33
5 Field Control Wiring ............................................................................... 34
6 General Arrangement Drawing – Bottom Return, Bottom Supply ........... 35
7 General Arrangement Drawing – Rear Return, Left or Right Supply ...... 36
8 Curb Layout Drawing.............................................................................. 37
BASIC MODEL NUMBER
: 50-ton
: 55-ton
: 60-ton
: 65-ton
: Rev. Level A
: Std. Product
: Special
: R-407C
: YORK
: Packaged
Rooftop
: Air-Cooled
: Scroll
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
BASE PRODUCT TYPE NOMINAL CAPACITY APPLICATION REFRIGERANT VOLTAGE DUCT LOCATIONS DESIGN SPECIAL
Y050 B17BA
P055 28L S
060 4 6 R X
A065 58 B
F
L S
CC
V
B
: 200 / 3 / 60
: 230 / 3 / 60
: 460 / 3 / 60
: 575 / 3 / 60
: Cooling Only
: Constant Volume
: VAV, VFD
: VAV, VFD w/ Manual Bypass
: Bottom Supply
: Left Supply
: Right Supply
: Bottom Return
: Front Return
: Side Return

YORK INTERNATIONAL
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FEATURES/BENEFITS
Ecological and Economical Design
• First packaged RTU with 407C optimized design
•Cooling and Heating – Superioroperatingperfor-
mance provides lower operating costs. Smaller
steps of cooling capacity provide tighter control of
building environment and occupant comfort while
optimizing energy efficiency.
•Indoor Air Quality (IAQ) – Outside air economiz-
ers provide energy savings in free cooling mode,
and can provide a healthier and more comfortable
buildingenvironmentbyintroducingfresh outsideair
intothebuildingas needed.IndoorAirQuality (IAQ)
requirementsforbuildingventilationandcomfortare
controlledthroughthemicroprocessorcontrol panel.
Optional air flow measurement provides an accu-
rate means of tracking air quality and alerting the
occupantsorbuilding ownertounhealthy situations.
•High-EfficiencyMotors –High-efficiencymotorsare
available for optimum energy efficiency. All motors
used on the eco2packaged rooftop air conditioner
meet U.S. EPACT 1992 minimum requirements.
Indoor Air Quality (IAQ)
•Double-sloped stainless steel drain pan – This
double-slopedinclinedstainlesssteeldrainpanfa-
cilitatesremovalofevaporatorcondensate.Sloped
in two directions conforming to ASHRAE 62n, this
drain pan swiftly minimizes any condensate within
the unit. Best of all, the drain pan is accessible for
periodic cleaning required by IAQ standards.
•Smart ventilation – YORK maintains the leader-
ship role in IAQ products with adaptive ventilation
control. The OptiLogicTM controls provide continu-
ousmonitoringofairqualityandtake actionbyopen-
ing the outside air dampers, bringing in the right
amount of fresh air before air impurities reach un-
comfortable or even dangerous levels.
•Air flow measurement – Precise measurement
of ventilation air flow is possible using an air flow
measurement station which can be installed in the
economizer section. Proper ventilation air flow is
requiredtoensuresufficient fresh air is in the build-
ing. A myriad of air flow measurement options are
available from minimum air flow to high-accuracy
full air flow capabilities. The complete system is
designed as an integrated component of the
OptiLogicTM controlsystemtoensureoptimumsys-
tem performance.
•Double-wall construction – Rigid double-wall
construction throughout provides ease of clean-
ing and protects against insulation fiber entrain-
ment in the breathable air. Double-wall construc-
tion also helps improve the acoustical character-
istics of the air handling unit.
Introduction
FIG. 1 –PACKAGED ROOFTOP AIR CONDITIONING UNIT
00406VIP

FORM 100.50-EG1
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YORK INTERNATIONAL
•Enhanced filtration –TheEco2unit gives design-
erstheflexibilitytomeetvariousIAQrequirements
with a full range of rigid and throwaway filters at
various efficiency levels.
Reliable Scroll Compressor Technology
Reliable,efficient,trouble-freeoperation isthetrue mea-
sure of a packaged rooftop’s value. That’s why YORK
Eco2Packaged Rooftop Air Conditioners use estab-
lishedscroll-compressortechnologytodeliverdepend-
able,economicalperformanceinawiderangeofappli-
cations. With the Eco2Packaged Rooftop, you get the
latest generation of compressor enhancements added
to the scroll’s inherent strengths. The simplicity of a
hermetic scroll compressor allows the use of fewer
moving parts to minimize breakdown. YORK also em-
ploys the latest sealing technology to avoid metal-to-
metal contact. Axial sealing is accomplished with float-
ingtipseals,while radial sealingutilizesamicrocushion
of oil. The result: a maintenance-free compressor pro-
viding minimum wear and maximum runtime.
Ascrollcompressor operateswithtwo scrollmembers—
a fixed scroll and an identical orbiting scroll turned 180
degrees,liketwo hands curledandinterlocked together.
As the orbiting scroll oscillates against the fixed scroll,
it traps and compresses suction gas inside involute
pockets. As the orbiting scroll moves, the gas is com-
pressed into the central area, where it is discharged as
compressedgas.Highefficiencyisachievedthrougha
preciselycontrolledorbitand the useofadvancedscroll
geometry. There is no wasted motion. All rotating parts
are statically and dynamically balanced to ensure opti-
mal performance over the long haul.
Balanced components and precision machining also
ensure that smooth compression occurs in all involute
pocketssimultaneously. When compression forces are
equally distributed over the entire scroll surface, equal
forces in opposing directions cancel one another, mini-
mizing any imbalance. Consequently, compression is
smooth, continuous, and quiet. Vibration isolators on
each compressor handle normal vibration. For extra
quietoperation,acousticsoundblanketsforeachcom-
pressor are available as options.
Serviceability
•OptiLogicTM –fully-integrated factory-packaged
controls are standard on every unit and include a
display unit with a 4x20 character LCD display.
OptiLogicTM continuallymonitorsallcontrolsetpoints
and configurations. If a unit or control component,
or sensor fails, the controller notifies the user of a
problem. If desired, YORK service can provide re-
motemonitoringandautomaticallyscheduleaser-
vicetechnicianto maketherepair andmaintainyour
comfort.
•Access doors –full-sized access doors provide
easy access into the unit for routine maintenance
and inspection.
•Suction & discharge service valves –oversized
service valves to provide isolation and quick recla-
mationandchargingof systemrefrigerantareavail-
abletominimizedowntimeandsimplifytheservice
and repair task.
•VFD Fan Motor Control with Manual Bypass –
OptionalmanualVFD bypassreducestime required
for troubleshooting, commissioning and system
balancing.
•Convenience Outlet –for maintenance tasks re-
quiring power tools, an optional 110V GFCI power
supply can power lights, drills or any other power
hand tool needed.
•Filter Maintenance Alarm –Anoptionalfilter main-
tenancealarmindicateswhen a filterbecomesdirty
and requires replacement or cleaning.
Install with Ease and Safety
•Factory run-tested –Each unit is subjected to a
series of quality assurance checks as well as an
automatedqualitycontrol processbeforebeingrun-
tested.Fansanddrivesarebalancedatthefactory
during testing. The factory run-test ensures safe,
proper operation when the unit is installed and re-
duces installation and commissioning time.
•Single-point power connection –Single-point
power connection reduces installation time by pro-
viding a single point for incoming power, including

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Introduction
theoptionalconvenienceoutlet. Allincomingpower
is connected in one location, reducing the cost of
field-supplied and installed power wiring.
•Factory-mounted and wired controls –All con-
trolpointswithintheunit are factory-installed,wired
and tested. The OptiLogicTM controls can commu-
nicate with BACNet IP.
•Non-fused disconnect –A factory-installed non-
fused disconnect switch simplifies unit installation
andserviceabilitybyreducinginstalledlaborcosts.
Thedisconnectswitchisinterlocked with thepower
cabinetensuringthatallpowertotheunithas been
disconnected before servicing.
Design Flexibility
•Low Ambient Operation –Head-pressurecontrol
is accomplished via a VFD motor controller rather
thananinefficient and noisycondenserfandamper.
By varying the speed of the condenser fan, better
controlandquieteroperationisobtained during the
colder months. Low ambient controls are available
on all systems offering higher rooftop cooling ca-
pacity than competitive units.
•HotGasBypass–Optionalonconstantvolumeunits,
hot gas bypass reduces the cycling of compressors
which helps prolong the life of the equipment.
•Supply Air Openings –Side supply connections
areavailableon selectconfigurations,offeringmore
flexibilityforductlayout and improvingsoundtrans-
mission characteristics.
•Compressor Sound Blankets –For applications
in sound-sensitive areas, compressor sound blan-
kets are available to reduce sound emitted from
the rooftop unit.
•Fan Spring Isolators –One-inch spring isolation
is used to prevent vibration transmission from the
rooftop unit’s supply fan to the building. Two-inch
spring isolation is also available.
•HarshEnvironments–A varietyofcoil coatingand
materialsareavailableas wellashailguards topro-
tect coils from weather damage. Seismic and hurri-
cane duty curbs and fan restraints are available.

FORM 100.50-EG1
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YORK INTERNATIONAL
Physical Data
TABLE 1 –PHYSICAL DATA
MODEL SIZE 50 55 60 65
GENERAL DATA
Length (Inches) 336 336 336 336
Width (Inches) 92 92 92 92
Height (Inches) 82 82 82 82
Operating Weights (Lbs.) (base unit, no options)
Cooling Only (Rigging & Refrigerant) 8,080 8,290 8,530 8,740
Rigging Weights (Lbs.) (base unit, no options)
Cooling Only 8,010 8,210 8,440 8,640
Option Weights (Lbs.)
Power Exhaust (Blower, motor, fan skid & mod damper) 647 647 647 647
Power Exhaust (Blower, motor, fan skid, VFD & baro damper) 654 654 654 654
100% AMS (Measurement Station & Mounting) 110 110 110 110
25/75% AMS (Measurement Station & Mounting) 130 130 130 130
Min. AMS (Measurement Station & Mounting) 40 40 40 40
Barometric only 36 36 36 36
Condenser Hail Guard 32 32 32 32
Copper Condenser Coils 617 617 793 793
Copper Evaporator Coils 262 320 400 500
Roof Curb Weights (Lbs.)
14" Full Perimeter Roof Curb 787 787 787 787
14" Open Condenser Roof Curb 555 555 555 555
Compressor Data
Quantity / Size (Nominal Tons ) 4/13 4/13 4/15 4/15
Type Scroll Scroll Scroll Scroll
Capacity Steps (%) 25, 50, 75, 100 25, 50, 75, 100 25, 50, 75, 100 25, 50, 75, 100
Supply Fan and Drive
Quantity 1111
Type FC FC FC FC
Size 25-22 25-22 25-22 25-22
Motor Size Range (min. to max. HP) 7.5-40 7.5-40 7.5-40 7.5-40
Air Flow Range (min. to max. cfm) 10000-22500 12000-24000 14000-27000 14000-27000
Static Pressure Range (min. to max. ESP) 0-4" 0-4" 0-4" 0-4"
Exhaust Fan
Quantity 2222
Type FC FC FC FC
Size 15-15 15-15 15-15 15-15
Motor Size Range (min. to max. HP) 5-20 5-20 5-20 5-20
Air Flow Range (min. to max. cfm) 0-20000 0-20000 0-20000 0-20000
Static Pressure Range (min. to max. ESP) 0-1" 0-1" 0-1" 0-1"
Evaporator Coil
Size (square feet) 48.8 48.8 48.8 48.8
Number of rows/fins per inch 3/8 4/8 4/12 5/10
Tube Diameter/Surface 1/2"/enhanced 1/2"/enhanced 1/2"/enhanced 1/2"/enhanced
Condenser Coil (Aluminum Fins)
Size (square feet) 121.3 121.3 121.3 121.3
Number of rows/fins per inch 3/14 3/14 3/18 3/18
Tube Diameter 3/8" 3/8" 3/8" 3/8"
Condenser Coil (Copper Fins –Opt)
Size (square feet) 121.3 121.3 121.3 121.3
Number of rows/fins per inch 3/14 3/14 3/18 3/18
Tube Diameter 3/8" 3/8" 3/8" 3/8"

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Physical Data (continued)
TABLE 1 –PHYSICAL DATA (Cont’d)
MODEL SIZE 50 55 60 65
GENERAL DATA
Condenser Fans
Quantity 4444
Type Prop. Prop. Prop. Prop.
Diameter (inches) 36 36 36 36
Filters –2" throwaway
Quantity 8 12 8 12 8 12 8 12
Size (length x width) (in.) 25x16 25x20 25x16 25x20 25x16 25x20 25x16 25x20
Total Filter Face Area (square feet) 63.9 63.9 63.9 63.9
Filters –2" cleanable
Quantity 8 12 8 12 8 12 8 12
Size (length x width) (in.) 25x16 25x20 25x16 25x20 25x16 25x20 25x16 25x20
Total Filter Face Area (square feet) 63.9 63.9 63.9 63.9
Filters –2" pleated (30% efficient)
Quantity 8 12 8 12 8 12 8 12
Size (length x width) (in.) 25x16 25x20 25x16 25x20 25x16 25x20 25x16 25x20
Total Filter Face Area (square feet) 63.9 63.9 63.9 63.9
Filters –12" rigid 65%, 2" 30% prefilter
Quantity 149149149149
Size (length x width) (in.) 16x20 25x16 25x20 16x20 25x16 25x20 16x20 25x16 25x20 16x20 25x16 25x20
Total Filter Face Area (square feet) 44.6 44.6 44.6 44.6
Filters –12" rigid 95%, 2" 30% prefilter
Quantity 149149149149
Size (length x width) (in.) 16x20 25x16 25x20 16x20 25x16 25x20 16x20 25x16 25x20 16x20 25x16 25x200
Total Filter Face Area (square feet) 44.6 44.6 44.6 44.6
Filters –2" carbon (30% efficient)
Quantity 8 12 8 12 8 12 8 12
Size (length x width) (in.) 25x16 25x20 25x16 25x20 25x16 25x20 25x16 25x20
Total Filter Face Area (square feet) 63.9 63.9 63.9 63.9
Refrigerant HFC-407C HFC-407C HFC-407C HFC-407C
Minimum OA Temp. for Mech. Clg. (°F) 45 45 45 45
Low Ambient Option Min. OA Temp. (°F) 0000

FORM 100.50-EG1
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YORK INTERNATIONAL
Application Data
LOCATION
Of the many factors that can affect the acoustical char-
acteristics of a rooftop installation, one of the most im-
portantistheunitlocation.Ideally,therooftopunitshould
be installed away from sound-sensitive areas, such as
conference rooms, auditoriums and executive offices.
Possible locations could be above storage areas, hall-
ways, mechanical or utility rooms, or bathrooms.
The eco2air conditioning units are designed for out-
door installation. When selecting a site for installation,
be guided by the following conditions:
• Unit must be installed on a level surface.
• For the outdoor location of the unit, select a place
having a minimum sun exposure and an adequate
supply of fresh air for the condenser.
• Also avoid locations beneath windows or between
structures.
• Optional condenser coil protection should be used
forseashorelocations orotherharshenvironments.
• The unit should be installed on a roof that is struc-
turally strong enough to support the weight of the
unit with a minimum of deflection. Extreme caution
shouldbetakenwhentheunitismounted onawood
structured roof. It is recommended that the unit(s)
beinstallednotmorethan15feetfromamainsup-
port beam to provide proper structural support and
to minimize the transmission of sound and vibra-
tion. Ideally,thecenter of gravity should belocated
over a structural support or building column.
• Location of unit(s) should also be away from build-
ingfluestacks orexhaustventilatorsto preventpos-
siblereintroductionofcontaminatedairthrough the
outside air intakes.
• Be sure the supporting structures will not obstruct
the duct, gas or wiring connections.
• Proper service clearance space of 6-feet around
the perimeter of the unit and 12-feet to any adja-
cent units is required to eliminate cross contami-
nation of exhaust and outdoor air, and for mainte-
nance tasks such as coil pull and cleaning. No ob-
structions should be above the condensing unit
section.
RIGGING
Proper rigging and handling of the equipment is man-
datory during unloading and setting it into position to
retain warranty status.
Spreader bars must be used to prevent damage to the
unitcasing.Allliftinglugsmustbeusedwhenliftingthe
rooftop unit.
Care must be taken to keep the unit in the upright posi-
tionduringriggingandtopreventdamagetothewater-
tight seams in the unit casing. Avoid unnecessary jar-
ring or rough handling.
Ground Level Locations
It is important that the units be installed on a substan-
tialbasethatwillnotsettle,causingstrainontherefrig-
erant lines and sheet metal and resulting in possible
leaks.Aone-piececoncreteslabwithfootersextended
below the frost line is highly recommended. Addition-
ally, the slab should not be tied to the main building
foundationasnoisesmaybetransmittedintothebuild-
ing structure.
For ground level installations, precautions should be
taken to protect the unit from tampering by, or injury to,
unauthorizedpersons.Erectingafencearoundthe unit
is another common practice.
ECONOMIZER
The economizer section is used for ventilation of the
conditioned space to maintain indoor air quality, and
also to reduce energy consumption by using outdoor
air cooling in lieu of mechanical cooling. If outdoor air
isappropriateforcooling,butnotsufficientfor the cool-
ing demand, mechanical cooling will stage on as nec-
essary until the cooling load is met.
Comparativeenthalpy operationis themost accurateand
efficientmeansofeconomizeroperation.TheOptiLogicTM
control monitors the return and outside air energy con-
tent, and selects the lower of the two for operation.
VAV SUPPLY AIR PRESSURE CONTROL
Traditional packaged rooftop systems use inlet guide
vanes (IGVs)forductstaticpressurecontrol.Thesecon-
trol supply duct pressure by modulating dampers (intro-
ducinglossesandinefficiencies)on the intlet of the fan,
open and closed. Variable frequency drives (VFDs) of-
fer superior fan speed control and quieter, energy effi-
cient operation.
IGV inefficiency can be compared to the operation of a
car. Modulating air flow with an IGV is like pressing on
the gas to drive the car, but modulating the speed of the
carbysimultaneouslypressingonthebrake.VFDmodu-
lation is speed modulation by using just the gas pedal.

YORK INTERNATIONAL
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For VAV applications, the YORK eco2unit uses a VFD
to modulate fan speed and maintain a constant duct
static pressure. VFDs offer superior control over the
operation of the unit at part load, and offer the addi-
tional benefits of quieter and more efficient operation
when compared to IGV.
HARSH ENVIRONMENTS –CONDENSER AND
EVAPORATOR COIL PROTECTION
For harsh environmental conditions such as seashore
applications, YORK offers three types of coil protec-
tion: copper fin material, black fin and Technicoat coat-
ings. YORK recommends that for corrosive environ-
ments that copper fins be used to protect the evapora-
tor and/or condenser coils. In areas where chemicals
that can corrode copper are present, such as ammo-
nia,YORKrecommendsthatthe black finorTechnicoat
coating be used for maximum protection.
Copper Fin Condenser Coil
Copper fins can be used instead of aluminum for addi-
tional corrosion protection, however it is not suitable
for areas that are subject to acid rain or exposed to
ammonia.
Pre-Coated Condenser Fins
Black fin coating (yellow fin for evaporator fins) is pre-
coatedapplicationepoxy onaluminumfinstocktoguard
fromcorrosiveagentsandinsulate against galvanic po-
tential. It is used for mild seashore or industrial loca-
tions.Thiscan providecorrosionresistancecomparable
to copper fin coils in typical seashore locations.
Post-Coated Condenser Fins
Technicoat(apost-coatedapplicationofepoxy)canbe
usedforseashoreandother corrosive applications with
the exception of strong alkalides, oxidizers, wet bro-
mide, chlorine and fluorine in concentrations greater
than 100 ppm.
Any of the above suitable options should be selected
based on the particular project design parameters and
related environmental factors. The application should
befurtherreviewedandapprovedby the consulting en-
gineer or owner based on their knowledge of the job
site conditions.
BUILDING EXHAUST SYSTEMS
Building exhaust systems are often necessary when
economizers are used to bring in outdoor air. Without
properbuildingexhaust,the buildingmaybecomeover-
pressurized.Theexhaustsystemmaintainstheproper
building pressure by expelling the appropriate amount
of air from the building. Exhaust systems are typically
designed to exhaust approximately 10% less air than
whatisenteringthe building.Thisprovidesaslight posi-
tive pressure on the building.
100% modulating exhaust with building static
pressure sensing and control
The 100% exhaust system can be configured with ei-
ther control actuated dampers or VFDs for modulating
control. The unit controller monitors the building pres-
sureusingadifferential pressure transducer and main-
tains the required building static pressure by modulat-
ingtheexhaustcontrol.Ifthebuildinghasothermeans
of exhaust or building pressure is not important, on/off
or barometric control may be used.
100% modulating exhaust with fan on/off control
The100%exhaustsystemcanbeconfiguredforon/off
operation eliminating the expense of the damper ac-
tuatorsorVFDs.This exhaust system canbecontrolled
by either the outside air damper position, or a building
static pressure sensor.
Barometric exhaust
Barometricexhaustcanbe usedwhensmalleramounts
of air at low static pressure variations within the build-
ing or other means of building exhaust are employed.
Barometricexhaustiscommonlyusedwherethereare
only small fluctuations in building pressure or where
building static pressure control is not necessary.
ROOF CURB
Optional 14-inch full-perimeter or open condenser roof
curbs can be provided if necessary for mounting to
thebuildingroof.Thesecurbscomedisassembledand
require installation in the field. For bottom supply and
return duct openings, the curbs have matching con-
nections to ease installation. A pipe chase that
matches the rooftop unit is also included in the curb
footprint for through-the-curb utility connections.
Application Data (continued)

FORM 100.50-EG1
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YORK INTERNATIONAL
The curb should be located according to the location
recommendations above, and properly sealed to pre-
vent moisture and air leakage into and out of the duct
system. Flexiblecollarsshouldbeusedwhen connect-
ing the duct work to prevent unit noise transmission
and vibration into the building.
Duct work should be supported independently of the
unit.
ACOUSTICAL CONSIDERATIONS
The eco2unit is designed for lower sound levels than
competitive units by using flexible fan connections, fan
spring isolators, double-wall construction, and lower
speed and horsepower fans. For VAV applications,
VFDs are used instead of inlet guide vanes. Additional
sound attenuation can be obtained using compressor
sound blankets and field-supplied sound attenuators
when necessary.
Evenwiththeseequipmentdesignfeatures,the acous-
ticalcharacteristicsoftheentireinstallationmustnever
beoverlooked.Additionalstepsfortheacousticalchar-
acteristicsofarooftopinstallationshouldbe addressed
during the design phase of a project to avoid costly al-
terations after the installation of the equipment. During
the design phase of a project, the designing engineer
shouldconsider, ataminimum,theimpactof the equip-
ment location, rooftop installation, building structure,
and duct work.
SELECTION PROCEDURE
Given:
Required total cooling capacity of 600 mbh and sen-
sible cooling capacity of 450 mbh with evaporator en-
teringairconditionsof83°F dry bulb and67°Fwetbulb.
Design ambient temperature is 95°F dry bulb. Supply
air requirements are 17500 cfm of air at 2.25 IWG ex-
ternal static pressure. Power supply is 460V/3ph/60Hz
and the unit requires a modulating economizer, 2-inch
pleatedfilters,bottomsupplyand bottomreturnair open-
ings and is constant volume.
Select Unit:
1. Determine the internal static pressure drop of the
cabinet by referencing Table 8.
Wet evaporator coil 0.54
Bottom supply opening 0.14
Bottom return opening 0.13
2-inch pleated filters 0.10
Economizer openings 0.24
Modulating economizer dampers 0.31
Total 1.46 IWG
2. Determine the total static pressure by adding the
internal to the external static pressure.
TSP = 1.46 IWG + 2.25 IWG
= 3.71 IWG total static pressure
3. Determine the BHP of the supply fan from Table 6
using the supply air flow and total static pressure.
Fromthetable,weinterpolateto get 15.1 BHP. As-
suming a drive loss of 3% and a motor efficiency of
90%,wecancalculate the heatrejectionofthe sup-
ply fan motor as:
(2545 x 15.1)/(0.90 x (1-0.03)) = 44.0 mbh
Required Cooling Capacities:
Total = 600 + 44.0 = 644 mbh
Sensible = 450 + 44.0 = 494 mbh
4. Requiredtotalandsensible capacities are644mbh
and494mbh,respectively. UsingtheCoolingPer-
formance Data starting with Tables 2, locate the
tablewiththe correctambientairtemperature.Next,
trace the 83°F entering air dry bulb temperature to
match the 17,500 cfm and 67°F entering wet bulb
temperaturecondition. Theresultingconditionsare,
from the table, 645 mbh total cooling capacity and
497mbhsensiblecoolingcapacity. Thus, a 50-ton
unit is selected.

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12
Cooling Performance Data –50 Ton Model
TABLE 2 –COOLING PERFORMANCE DATA –50 TON MODEL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 700 477 700 431 695 387 692 353 691 311 ——
10000 67 653 548 646 500 635 454 637 416 632 377 626 343
62 640 640 608 608 590 583 582 562 569 514 574 455
72 711 500 708 445 705 399 701 360 699 316 ——
14000 67 665 581 656 523 647 474 647 431 643 388 637 349
62 654 654 625 625 606 606 594 547 583 498 585 439
72 729 536 721 467 719 418 715 370 712 324 ——
17500 67 684 634 672 558 666 505 663 454 660 406 653 359
62 680 680 652 652 632 625 612 550 606 497 603 438
72 749 576 736 492 736 439 732 382 726 333 ——
20000 67 705 695 689 597 686 540 680 479 679 425 672 370
62 710 710 682 682 661 661 633 582 631 523 622 467
72 758 595 742 504 743 449 739 388 732 338 ——
22500 67 715 715 697 616 696 557 689 492 688 435 680 376
62 715 715 696 610 674 549 643 486 643 429 631 370
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
85°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 673 468 673 416 669 375 667 340 664 301 ——
10000 67 628 536 630 494 615 445 616 404 609 383 605 331
62 618 618 590 590 569 513 571 481 562 435 562 390
72 684 491 682 432 678 388 676 348 673 306 ——
14000 67 642 569 638 515 627 465 625 419 619 382 615 338
62 635 635 607 607 586 541 580 500 572 453 571 407
72 701 526 696 458 693 407 690 360 686 315 ——
17500 67 665 625 651 547 645 497 640 443 635 382 630 348
62 661 661 634 634 612 587 594 531 588 481 586 433
72 720 565 712 486 709 429 705 373 701 325 ——
20000 67 691 691 665 582 665 532 656 470 653 382 647 360
62 691 691 663 663 641 641 609 565 606 511 602 462
72 729 584 720 500 717 439 712 380 708 329 ——
22500 67 703 703 672 599 674 549 664 483 661 382 655 366
62 704 704 675 658 655 629 617 556 614 488 610 447
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
95°AIR ON CONDENSER COIL

FORM 100.50-EG1
13
YORK INTERNATIONAL
TABLE 2 –COOLING PERFORMANCE DATA –50 TON MODEL (CONT’D)
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 649 464 650 409 645 365 644 330 644 290 ——
10000 67 590 513 596 478 589 434 591 390 593 354 589 318
62 597 597 573 573 536 498 549 460 544 429 542 384
72 658 483 658 424 653 378 651 338 650 295 ——
14000 67 609 550 608 501 600 454 600 406 601 366 597 326
62 614 614 589 589 556 527 557 483 553 446 550 397
72 673 512 670 447 667 397 663 350 661 303 ——
17500 67 638 607 625 537 618 485 615 432 613 384 609 337
62 641 641 614 614 587 571 570 520 567 472 563 419
72 689 545 684 472 682 419 677 364 672 311 ——
20000 67 670 670 645 577 638 520 631 461 626 404 623 350
62 670 670 642 642 621 621 584 561 582 500 576 443
72 696 560 690 485 690 430 683 371 678 315 ——
22500 67 686 695 654 596 647 537 639 475 632 414 629 356
62 684 684 655 655 637 644 591 580 590 514 583 455
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
105°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 563 368 562 318 567 286 558 258 563 233 ——
10000 67 494 424 524 387 514 349 515 313 514 281 518 254
62 498 498 501 501 442 424 458 349 467 343 467 306
72 592 432 588 370 589 325 585 286 583 246 ——
14000 67 548 509 545 449 541 406 539 359 536 317 537 276
62 550 550 533 533 498 488 494 434 491 395 489 349
72 608 465 603 397 600 346 600 300 594 253 ——
17500 67 577 555 557 481 555 435 552 383 548 336 547 288
62 578 578 550 550 527 522 513 478 504 422 500 371
72 625 503 618 427 613 368 616 316 606 261 ——
20000 67 609 609 570 517 571 468 566 410 562 357 558 301
62 609 609 568 568 560 560 534 528 518 452 513 396
72 633 520 626 441 619 379 623 324 611 265 ——
22500 67 624 624 576 534 579 484 572 423 568 367 563 307
62 624 624 577 577 575 578 544 548 525 467 520 408
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
115°AIR ON CONDENSER COIL

YORK INTERNATIONAL
14
TABLE 3 –COOLING PERFORMANCE DATA –55 TON MODEL
Cooling Performance Data –55 Ton Model
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 732 488 704 437 700 393 696 356 695 313 ——
12000 67 677 564 651 511 641 463 642 423 637 382 631 346
62 660 648 616 616 598 598 588 564 576 515 579 456
72 743 512 712 452 709 405 706 363 703 319 ——
16000 67 693 598 661 535 653 484 652 438 649 394 642 353
62 680 661 634 634 615 587 600 531 591 481 591 421
72 767 564 731 485 731 433 727 378 722 331 ——
19250 67 728 677 684 586 680 530 675 472 673 419 666 367
62 725 701 673 673 652 652 627 572 624 515 616 458
72 781 592 741 502 742 448 738 387 731 337 ——
22000 67 750 713 695 613 694 554 688 490 687 433 679 375
62 750 713 694 613 672 554 642 490 641 433 630 375
72 786 604 746 510 747 454 743 390 736 340 ——
24000 67 758 720 701 625 701 565 693 497 692 439 685 378
62 760 720 701 602 681 534 648 473 649 416 636 357
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
85°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 706 479 678 424 673 381 671 344 668 303 ——
12000 67 651 554 634 504 621 454 621 411 613 382 610 334
62 641 626 598 598 577 527 575 490 567 444 566 398
72 716 502 687 441 683 394 680 352 677 309 ——
16000 67 668 585 643 525 633 476 630 427 624 382 620 341
62 661 644 616 616 594 554 585 511 577 462 576 415
72 738 554 708 478 704 422 700 369 696 322 ——
19250 67 707 671 661 572 659 521 651 462 647 382 642 357
62 705 682 654 654 633 625 605 555 600 502 598 453
72 751 581 719 497 715 438 711 379 707 328 ——
22000 67 728 701 671 597 673 546 663 481 660 382 654 365
62 730 703 675 675 653 653 616 578 613 524 609 473
72 756 593 723 506 720 444 715 383 711 331 ——
24000 67 737 709 675 607 678 556 667 489 665 382 659 369
62 740 709 675 607 662 556 620 489 618 382 614 369
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
95°AIR ON CONDENSER COIL

FORM 100.50-EG1
15
YORK INTERNATIONAL
TABLE 3 –COOLING PERFORMANCE DATA –55 TON MODEL (CONT’D)
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 642 473 654 416 649 371 647 334 647 292 ——
12000 67 593 531 602 489 594 443 595 397 597 359 593 322
62 592 605 581 581 546 512 553 471 549 437 546 390
72 661 493 662 432 658 384 655 342 654 297 ——
16000 67 619 569 613 513 606 464 605 415 605 372 601 330
62 618 623 598 598 566 542 561 496 558 454 554 405
72 701 535 679 465 678 413 673 360 669 308 ——
19250 67 679 651 639 565 632 510 626 452 622 398 619 346
62 679 661 634 634 611 606 580 549 578 492 572 436
72 723 558 689 483 689 428 682 370 677 314 ——
22000 67 711 696 653 593 645 534 637 473 631 412 628 355
62 711 682 653 653 635 641 590 577 588 512 582 453
72 733 567 693 490 693 435 686 374 681 317 ——
24000 67 724 693 659 605 651 545 642 481 635 418 632 359
62 725 691 661 661 645 656 594 590 593 521 586 460
105°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 657 460 624 400 618 357 613 321 610 284 ——
12000 67 606 535 579 477 571 435 566 390 563 350 559 312
62 598 581 557 567 528 517 519 458 517 425 512 381
72 665 482 633 417 627 371 623 330 619 288 ——
16000 67 623 562 588 498 582 454 577 406 573 362 570 319
62 617 600 572 578 547 539 534 487 528 443 523 395
72 682 529 653 455 647 399 645 350 640 297 ——
19250 67 660 632 606 544 605 496 599 440 595 388 592 335
62 659 639 602 602 589 587 565 551 552 481 547 426
72 692 554 663 476 658 414 657 360 651 302 ——
22000 67 680 660 617 568 617 518 611 458 607 402 603 343
62 682 660 616 614 611 613 582 585 565 501 559 443
72 696 565 668 484 663 421 662 365 656 304 ——
24000 67 689 668 621 578 622 527 617 466 613 408 608 347
62 692 669 622 620 621 624 589 589 570 510 565 450
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
115°AIR ON CONDENSER COIL

YORK INTERNATIONAL
16
TABLE 4 –COOLING PERFORMANCE DATA –60 TON MODEL
Cooling Performance Data –60 Ton Model
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 804 495 804 461 801 277 798 383 792 344 ——
14000 67 736 586 728 522 729 339 727 440 725 408 723 377
62 689 689 663 663 658 442 656 543 647 493 654 424
72 846 609 840 538 837 410 833 426 827 372 ——
18000 67 795 720 773 632 771 504 769 519 767 468 761 415
62 771 771 740 740 725 617 704 630 700 572 699 502
72 867 666 858 576 855 477 851 448 845 386 ——
21000 67 824 787 795 687 792 587 790 558 787 498 780 434
62 813 813 779 779 759 705 728 673 726 611 722 541
72 888 722 876 614 872 544 868 470 862 401 ——
24000 67 854 854 818 742 814 670 810 598 808 528 799 453
62 854 854 817 817 792 792 752 716 752 651 744 580
72 897 748 884 632 880 574 876 480 870 407 ——
27000 67 867 867 828 767 823 708 820 616 818 541 808 461
62 873 873 835 835 808 817 763 736 764 669 755 598
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
85°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 773 491 771 442 769 336 769 368 763 331 ——
14000 67 723 527 692 464 703 397 703 432 699 437 696 363
62 671 671 645 645 631 474 642 505 655 416 673 318
72 814 599 808 524 804 434 802 414 797 361 ——
18000 67 775 678 752 570 745 529 742 508 736 455 732 402
62 750 750 719 719 699 620 684 604 682 550 681 494
72 834 652 827 565 822 482 819 438 814 376 ——
21000 67 802 753 783 623 766 594 761 546 755 463 751 421
62 789 789 756 756 732 693 706 653 696 616 685 582
72 854 706 846 607 840 531 835 461 831 391 ——
24000 67 828 828 813 675 788 660 780 584 774 472 769 441
62 828 828 793 793 766 766 727 703 709 683 689 670
72 864 730 854 626 848 553 843 471 838 397 ——
27000 67 840 863 827 699 797 691 789 601 782 476 778 450
62 846 846 810 810 782 788 737 726 716 714 690 710
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
95°AIR ON CONDENSER COIL

FORM 100.50-EG1
17
YORK INTERNATIONAL
TABLE 4 –COOLING PERFORMANCE DATA –60 TON MODEL (CONT’D)
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 753 500 744 438 741 392 741 357 737 319 ——
14000 67 690 469 676 304 672 458 681 416 681 384 678 350
62 652 652 627 627 587 554 616 489 632 454 624 412
72 782 588 778 514 774 457 771 403 767 347 ——
18000 67 745 635 718 508 713 550 715 494 711 442 708 389
62 726 726 697 697 664 648 658 589 655 536 655 480
72 797 633 794 551 790 490 787 425 782 361 ——
21000 67 773 718 739 610 734 597 732 533 727 471 723 409
62 763 763 732 732 702 694 679 639 667 576 670 515
72 811 677 811 589 806 522 802 448 798 375 ——
24000 67 801 801 761 712 754 643 750 572 742 500 738 428
62 800 800 767 767 741 741 700 690 679 617 686 549
72 818 697 818 606 814 537 809 459 804 382 ——
27000 67 814 839 771 759 764 664 757 589 749 514 744 437
62 817 817 783 783 758 759 710 709 684 636 693 565
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
105°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 726 485 711 413 702 376 698 345 689 309 ——
14000 67 629 574 647 512 647 447 643 411 635 370 633 338
62 626 626 607 622 562 543 561 467 582 447 574 404
72 749 572 742 496 736 440 732 389 726 335 ——
18000 67 700 673 688 603 683 537 680 484 673 429 669 376
62 699 699 666 673 639 629 625 578 620 524 617 472
72 760 615 758 538 754 473 749 411 744 349 ——
21000 67 736 722 708 648 701 582 699 521 692 458 687 395
62 735 735 695 698 677 672 657 634 640 563 638 505
72 772 658 774 580 771 505 766 433 763 362 ——
24000 67 772 772 728 693 718 627 717 558 711 487 706 414
62 772 772 724 724 715 715 690 690 659 602 659 539
72 777 678 781 599 779 520 773 443 771 368 ——
27000 67 788 788 737 714 727 647 726 574 719 501 714 423
62 788 788 737 735 732 733 704 706 668 619 669 555
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
115°AIR ON CONDENSER COIL

YORK INTERNATIONAL
18
TABLE 5 –COOLING PERFORMANCE DATA –65 TON MODEL
Cooling Performance Data –65 Ton Model
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 810 572 808 504 806 454 802 405 798 357 ——
14000 67 767 658 747 593 743 542 744 491 740 443 737 393
62 733 733 704 704 676 631 686 581 682 530 680 477
72 822 603 820 528 817 473 813 419 809 365 ——
18000 67 782 699 759 625 756 570 755 513 751 460 748 406
62 756 756 726 726 699 664 697 610 694 556 691 500
72 844 656 839 569 836 505 832 442 827 380 ——
21000 67 800 768 781 681 777 618 774 551 770 489 766 426
62 797 797 764 764 737 720 717 661 714 600 710 538
72 866 709 858 610 855 537 850 464 844 394 ——
24000 67 837 837 802 737 798 665 793 589 788 519 784 447
62 837 837 802 802 776 776 737 712 734 644 729 577
72 875 733 867 629 863 552 859 475 852 401 ——
27000 67 854 854 812 762 807 687 801 606 797 532 792 456
62 854 854 812 753 794 674 746 592 743 518 738 441
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
95°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 840 584 839 516 836 467 833 418 828 368 ——
14000 67 785 669 774 605 771 554 772 502 768 456 764 406
62 754 754 724 724 695 640 710 589 707 542 706 492
72 853 615 851 540 848 486 844 431 840 377 ——
18000 67 802 713 788 638 784 582 784 525 780 473 776 418
62 779 779 748 748 719 676 723 620 719 568 717 513
72 876 668 871 582 868 518 864 454 859 392 ——
21000 67 827 788 810 694 806 630 804 563 800 502 796 439
62 821 821 787 787 760 739 745 674 741 612 737 548
72 899 721 892 623 888 550 884 477 878 407 ——
24000 67 862 862 833 750 828 678 824 601 820 531 815 460
62 862 862 827 827 801 801 767 727 762 656 757 584
72 909 745 901 642 898 564 893 488 887 413 ——
27000 67 878 878 843 776 838 700 833 619 829 544 824 469
62 878 878 843 765 820 686 777 604 772 530 766 455
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
85°AIR ON CONDENSER COIL

FORM 100.50-EG1
19
YORK INTERNATIONAL
TABLE 5 –COOLING PERFORMANCE DATA –65 TON MODEL (CONT’D)
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 780 560 777 493 774 442 771 393 768 342 ——
14000 67 737 646 717 581 714 529 714 476 711 430 708 381
62 710 710 682 682 650 621 658 565 655 516 653 466
72 792 591 788 516 785 461 781 406 777 351 ——
18000 67 753 683 730 613 726 556 725 499 721 447 718 393
62 732 732 703 703 672 650 669 595 666 542 663 486
72 812 643 805 555 802 493 798 429 794 365 ——
21000 67 771 746 752 668 746 604 744 538 738 476 734 413
62 771 771 739 739 711 700 689 647 685 586 681 522
72 831 696 822 595 820 524 816 452 810 379 ——
24000 67 809 809 774 722 766 651 762 576 756 505 751 433
62 809 809 774 774 750 750 709 698 704 630 699 558
72 840 720 830 613 828 539 823 462 817 386 ——
27000 67 826 826 784 747 775 673 770 594 763 518 759 442
62 826 826 791 791 767 772 718 721 712 650 707 574
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
105°AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM ENTERING 90 86 83 80 77 74
WB (°F) CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC CAP SHC
72 748 548 744 478 742 429 738 378 735 330 ——
14000 67 708 639 690 570 686 517 684 463 681 417 678 368
62 681 681 664 664 621 608 625 550 628 503 625 452
72 759 578 754 502 752 448 748 392 744 338 ——
18000 67 724 671 700 599 696 544 694 486 690 434 687 380
62 704 704 679 679 644 634 642 583 638 528 635 473
72 776 629 771 543 768 479 766 415 759 352 ——
21000 67 741 725 716 650 714 591 711 523 706 462 703 400
62 741 741 706 706 682 678 669 640 655 571 651 508
72 794 680 789 584 784 511 784 438 774 366 ——
24000 67 779 779 732 700 732 637 728 561 722 491 718 419
62 779 779 732 732 721 721 697 697 672 615 668 543
72 802 703 797 603 791 525 792 449 781 372 ——
27000 67 796 796 740 723 740 658 736 578 729 504 725 428
62 796 796 740 717 738 648 710 563 680 490 676 414
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
115°AIR ON CONDENSER COIL

YORK INTERNATIONAL
20
Fan Performance
TABLE 6 –50 THROUGH 65 TON SUPPLY FAN DATA
TABLE 6 –50 THROUGH 65 TON SUPPLY FAN DATA (CONT’D)
TOTAL STATIC PRESSURE (inches of water column)
CFM 3.50 4.00 4.50 5.00 5.50 6.00
STD. AIR RPM HP RPM HP RPM HP RPM HP RPM HP RPM HP
10000 –– –– –– –– –– –– –– –– –– –– –– ––
12000 –– –– –– –– –– –– –– –– –– –– –– ––
14000 585 10.5 –– –– –– –– –– –– –– –– –– ––
16000 587 12.5 622 13.8 663 15.4 700 17.0 –– –– –– ––
17500 595 14.5 629 15.9 664 17.3 697 18.8 549 15.9 575 17.3
18000 597 15.2 631 16.6 664 18.0 696 19.5 732 21.2 766 23.0
19250 605 17.1 638 18.6 670 20.1 702 21.6 734 23.3 765 25.0
20000 609 18.2 642 19.8 674 21.4 705 22.9 735 24.5 764 26.1
21000 617 19.9 649 21.6 681 23.3 710 24.9 740 26.6 769 28.2
22000 624 21.7 655 23.4 688 25.3 715 26.9 744 28.6 773 30.4
22500 628 22.7 659 24.4 691 26.3 719 28.0 748 29.8 776 31.5
24000 640 25.7 671 27.5 700 29.4 729 31.4 759 33.4 783 35.1
26000 656 30.2 687 32.2 716 34.2 742 36.1 769 38.2 798 40.5
27000 665 32.7 693 34.6 723 36.8 751 38.9 778 41.0 802 43.1
TOTAL STATIC PRESSURE (inches of water column)
CFM 0.50 1.00 1.50 2.00 2.50 3.00
STD. AIR RPM HP RPM HP RPM HP RPM HP RPM HP RPM HP
10000 249 1.7 321 2.5 382 3.3 –– –– –– –– –– —
12000 269 2.5 335 3.4 392 4.4 443 5.3 493 6.4 –– —
14000 290 3.6 352 4.7 405 5.8 454 6.9 497 8.0 540 9.1
16000 312 5.1 371 6.3 421 7.5 467 8.7 510 10.0 549 11.2
17500 329 6.3 386 7.7 435 9.0 478 10.4 519 11.7 558 13.1
18000 334 6.8 391 8.2 439 9.6 482 10.9 522 12.3 561 13.8
19250 348 8.1 404 9.6 451 11.1 493 12.5 532 14.0 570 15.5
20000 357 8.9 412 10.5 458 12.1 499 13.5 538 15.1 575 16.6
21000 370 10.1 423 11.9 468 13.5 510 15.1 547 16.7 583 18.3
22000 383 11.4 434 13.3 478 15.0 520 16.7 555 18.3 591 20.0
22500 387 12.0 440 14.1 484 15.8 524 17.6 560 19.2 595 20.9
24000 398 13.9 458 16.6 500 18.4 537 20.2 574 22.1 607 23.8
26000 417 16.8 478 20.2 520 22.3 559 24.4 593 26.3 626 28.3
27000 429 18.6 490 22.3 533 24.6 572 26.8 602 28.6 638 30.9