Packaged Rooftop
Air Conditioning Units
FORM 100.50-EG1 (201)
R-407C OPTIMIZED
50 THROUGH 65 TONS
00406VIP
TABLE OF CONTENTS
PAGE
Nomenclature .........................................................................................................3
Introduction .............................................................................................................4
Physical Data..........................................................................................................7
Application Data......................................................................................................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
1 1 Condenser Fan Motors ............................................................................25
12 Controls and Convenience Outlet.............................................................25
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YORK INTERNATIONAL
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
FORM 100.50-EG1
PAGE
NOMENCLATURE
BASIC MODEL NUMBER
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
: YORK
: Packaged
Rooftop
A065 58 B
: Air-Cooled
L S
: Scroll
: 50-ton
: 55-ton
060 4 6 R X
: 60-ton
: 65-ton
: Cooling Only
C
: Constant Volume
C
: VAV, VFD
V
: VAV , VFD w/ Manual Bypass
B
: R-407C
: 200 / 3 / 60
: 230 / 3 / 60
: 460 / 3 / 60
: 575 / 3 / 60
: Bottom Supply
: Left Supply
: Right Supply
: Bottom Return
F
: Front Return
: Side Return
: Rev. Level A
: Std. Product
: Special
YORK INTERNATIONAL
3
Introduction
FIG. 1 – PACKAGED ROOFTOP AIR CONDITIONING UNIT
00406VIP
FEATURES/BENEFITS
Ecological and Economical Design
• First packaged R TU with 407C optimized design
• Cooling and Heating – Superior operating performance 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 economizers provide energy savings in free cooling mode,
and can provide a healthier and more comfortable
building environment by introducing fresh outside air
into the building as needed. Indoor Air Quality (IAQ)
requirements for building ventilation and comfort are
controlled through the microprocessor control panel.
Optional air flow measurement provides an accurate means of tracking air quality and alerting the
occupants or building owner to unhealthy situations.
• High-Efficiency Motors – High-ef ficiency motors are
available for optimum energy efficiency. All motors
used on the eco2 packaged rooftop air conditioner
meet U.S. EP ACT 1992 minimum requirements.
Indoor Air Quality (IAQ)
• Double-sloped stainless steel drain pan – This
double-sloped inclined stainless steel drain pan facilitates removal of evaporator condensate. 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 leadership role in IAQ products with adaptive ventilation
control. The OptiLogicTM controls provide continuous monitoring of air quality and take action by opening the outside air dampers, bringing in the right
amount of fresh air before air impurities reach uncomfortable 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
required to ensure sufficient fresh air is in the building. 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 control system to ensure optimum system performance.
• Double-wall construction – Rigid double-wall
construction throughout provides ease of cleaning and protects against insulation fiber entrainment in the breathable air. Double-wall construction also helps improve the acoustical characteristics of the air handling unit.
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FORM 100.50-EG1
• Enhanced filtration – The Eco2 unit gives designers the flexibility to meet various IAQ requirements
with a full range of rigid and throwaway filters at
various efficiency levels.
Reliable Scroll Compressor Technology
Reliable, efficient, trouble-free operation is the true measure of a packaged rooftop’s value. That’s why YORK
Eco2 Packaged Rooftop Air Conditioners use established scroll-compressor technology to deliver dependable, economical performance in a wide range of applications. With the Eco2 Packaged 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 employs the latest sealing technology to avoid metal-tometal contact. Axial sealing is accomplished with floating tip seals, while radial sealing utilizes a microcushion
of oil. The result: a maintenance-free compressor providing minimum wear and maximum runtime.
A scroll compressor operates with two scroll members—
a fixed scroll and an identical orbiting scroll turned 180
degrees, like two hands curled and interlocked 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 compressed into the central area, where it is discharged as
compressed gas. High efficiency is achieved through a
precisely controlled orbit and the use of advanced scroll
geometry . There is no wasted motion. All rotating parts
are statically and dynamically balanced to ensure optimal performance over the long haul.
Balanced components and precision machining also
ensure that smooth compression occurs in all involute
pockets simultaneously . When compression forces are
equally distributed over the entire scroll surface, equal
forces in opposing directions cancel one another, minimizing any imbalance. Consequently, compression is
smooth, continuous, and quiet. Vibration isolators on
each compressor handle normal vibration. For extra
quiet operation, acoustic sound blankets for each compressor 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.
OptiLogic
TM
continually monitors all control setpoints
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 remote monitoring and automatically schedule a service technician to make the repair and maintain your
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 reclamation and charging of system refrigerant are available to minimize downtime and simplify the service
and repair task.
• VFD Fan Motor Control with Manual Bypass –
Optional manual VFD bypass reduces time required
for troubleshooting, commissioning and system
balancing.
• Convenience Outlet – for maintenance tasks requiring power tools, an optional 1 10V GFCI power
supply can power lights, drills or any other power
hand tool needed.
• Filter Maintenance Alarm – An optional filter maintenance alarm indicates when a filter becomes dirty
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
automated quality control process before being runtested. Fans and drives are balanced at the factory
during testing. The factory run-test ensures safe,
proper operation when the unit is installed and reduces installation and commissioning time.
• Single-point power connection – Single-point
power connection reduces installation time by providing a single point for incoming power, including
YORK INTERNATIONAL
5
Introduction
the optional convenience outlet. All incoming power
is connected in one location, reducing the cost of
field-supplied and installed power wiring.
• Factory-mounted and wired controls – All control points within the unit are factory-installed, wired
and tested. The OptiLogic
nicate with BACNet IP.
• Non-fused disconnect – A factory-installed nonfused disconnect switch simplifies unit installation
and serviceability by reducing installed labor costs.
The disconnect switch is interlocked with the power
cabinet ensuring that all power to the unit has been
disconnected before servicing.
Design Flexibility
• Low Ambient Operation – Head-pressure control
is accomplished via a VFD motor controller rather
than an inefficient and noisy condenser fan damper.
By varying the speed of the condenser fan, better
control and quieter operation is obtained during the
colder months. Low ambient controls are available
TM
controls can commu-
on all systems offering higher rooftop cooling capacity than competitive units.
• Hot Gas Bypass – Optional on constant volume units,
hot gas bypass reduces the cycling of compressors
which helps prolong the life of the equipment.
• Supply Air Openings – Side supply connections
are available on select configurations, offering more
flexibility for duct layout and improving sound transmission characteristics.
• Compressor Sound Blankets – For applications
in sound-sensitive areas, compressor sound blankets 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.
• Harsh Environments – A variety of coil coating and
materials are available as well as hail guards to protect coils from weather damage. Seismic and hurricane duty curbs and fan restraints are available.
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FORM 100.50-EG1
Physical Data
T ABLE 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 6 54 654
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"
YORK INTERNATIONAL
7
Physical Data
(continued)
T ABLE 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
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YORK INTERNATIONAL
Application Data
FORM 100.50-EG1
LOCATION
Of the many factors that can affect the acoustical characteristics of a rooftop installation, one of the most important is the unit location. Ideally , the rooftop unit should
be installed away from sound-sensitive areas, such as
conference rooms, auditoriums and executive offices.
Possible locations could be above storage areas, hallways, mechanical or utility rooms, or bathrooms.
The eco
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
• Also avoid locations beneath windows or between
• Optional condenser coil protection should be used
2
air conditioning units are designed for out-
having a minimum sun exposure and an adequate
supply of fresh air for the condenser.
structures.
for seashore locations or other harsh environments.
Spreader bars must be used to prevent damage to the
unit casing. All lifting lugs must be used when lifting the
rooftop unit.
Care must be taken to keep the unit in the upright position during rigging and to prevent damage to the watertight seams in the unit casing. Avoid unnecessary jarring or rough handling.
Ground Level Locations
It is important that the units be installed on a substantial base that will not settle, causing strain on the refrigerant lines and sheet metal and resulting in possible
leaks. A one-piece concrete slab with footers extended
below the frost line is highly recommended. Additionally, the slab should not be tied to the main building
foundation as noises may be transmitted into the building structure.
For ground level installations, precautions should be
taken to protect the unit from tampering by, or injury to,
unauthorized persons. Erecting a fence around the unit
is another common practice.
• The unit should be installed on a roof that is structurally strong enough to support the weight of the
unit with a minimum of deflection. Extreme caution
should be taken when the unit is mounted on a wood
structured roof. It is recommended that the unit(s)
be installed not more than 15 feet from a main support beam to provide proper structural support and
to minimize the transmission of sound and vibration. Ideally , the center of gravity should be located
over a structural support or building column.
• Location of unit(s) should also be away from building flue stacks or exhaust ventilators to prevent possible reintroduction of contaminated air through 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 adjacent units is required to eliminate cross contamination of exhaust and outdoor air, and for maintenance tasks such as coil pull and cleaning. No obstructions should be above the condensing unit
section.
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
is appropriate for cooling, but not sufficient for the cooling demand, mechanical cooling will stage on as necessary until the cooling load is met.
Comparative enthalpy operation is the most accurate and
efficient means of economizer operation. The OptiLogic
control monitors the return and outside air energy content, and selects the lower of the two for operation.
V AV SUPPLY AIR PRESSURE CONTROL
Traditional packaged rooftop systems use inlet guide
vanes (IGVs) f or du ct st atic pre ssur e con trol. These control supply duct pressure by modulating dampers (introducing losses and inef ficiencies) on the intlet of the fan,
open and closed. V ariable frequency drives (VFDs) offer superior fan speed control and quieter, energy ef ficient operation.
TM
RIGGING
Proper rigging and handling of the equipment is mandatory during unloading and setting it into position to
retain warranty status.
YORK INTERNATIONAL
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
car by simultaneously pressing on the brake. VFD modulation is speed modulation by using just the gas pedal.
9
Application Data
(continued)
For VAV applications, the YORK eco2 unit 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 additional benefits of quieter and more efficient operation
when compared to IGV.
HARSH ENVIRONMENTS – CONDENSER AND EV APORATOR COIL PROTECTION
For harsh environmental conditions such as seashore
applications, YORK offers three types of coil protection: copper fin material, black fin and T echnicoat coatings. YORK recommends that for corrosive environments that copper fins be used to protect the evaporator and/or condenser coils. In areas where chemicals
that can corrode copper are present, such as ammonia, YORK recommends that the black fin or T echnicoat
coating be used for maximum protection.
Copper Fin Condenser Coil
Copper fins can be used instead of aluminum for additional 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 precoated application epoxy on aluminum fin stock to guard
from corrosive agents and insulate against galvanic potential. It is used for mild seashore or industrial locations. This can provide corrosion resistance comparable
to copper fin coils in typical seashore locations.
Post-Coated Condenser Fins
T echnicoat (a post-coated application of epoxy) can be
used for seashore and other corrosive applications with
the exception of strong alkalides, oxidizers, wet bromide, 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
be further reviewed and approved by the consulting engineer 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
proper building exhaust, the building may become overpressurized. The exhaust system maintains the proper
building pressure by expelling the appropriate amount
of air from the building. Exhaust systems are typically
designed to exhaust approximately 10% less air than
what is entering the building. This provides a slight positive pressure on the building.
100% modulating exhaust with building static
pressure sensing and control
The 100% exhaust system can be configured with either control actuated dampers or VFDs for modulating
control. The unit controller monitors the building pressure using a differential pressure transducer and maintains the required building static pressure by modulating the exhaust control. If the building has other means
of exhaust or building pressure is not important, on/off
or barometric control may be used.
100% modulating exhaust with fan on/off control
The 100% exhaust system can be configured for on/off
operation eliminating the expense of the damper actuators or VFDs. This exhaust system can be controlled
by either the outside air damper position, or a building
static pressure sensor.
Barometric exhaust
Barometric exhaust can be used when smaller amounts
of air at low static pressure variations within the building or other means of building exhaust are employed.
Barometric exhaust is commonly used where there are
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
the building roof. These curbs come disassembled and
require installation in the field. For bottom supply and
return duct openings, the curbs have matching connections to ease installation. A pipe chase that
matches the rooftop unit is also included in the curb
footprint for through-the-curb utility connections.
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YORK INTERNATIONAL
FORM 100.50-EG1
The curb should be located according to the location
recommendations above, and properly sealed to prevent moisture and air leakage into and out of the duct
system. Flexible collars should be used when connecting the duct work to prevent unit noise transmission
and vibration into the building.
Duct work should be supported independently of the
unit.
ACOUSTICAL CONSIDERA TIONS
The eco
2
unit 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 .
Even with these equipment design features, the acoustical characteristics of the entire installation must never
be overlooked. Additional steps for the acoustical characteristics of a rooftop installation should be addressed
during the design phase of a project to avoid costly alterations after the installation of the equipment. During
the design phase of a project, the designing engineer
should consider, at a minimum, the impact of the equipment location, rooftop installation, building structure,
and duct work.
SELECTION PROCEDURE
Given:
Required total cooling capacity of 600 mbh and sensible cooling capacity of 450 mbh with evaporator entering air conditions of 83°F dry bulb and 67°F wet bulb.
Design ambient temperature is 95°F dry bulb. Supply
air requirements are 17500 cfm of air at 2.25 IWG external static pressure. Power supply is 460V/3ph/60Hz
and the unit requires a modulating economizer, 2-inch
pleated filters, bottom supply and bottom return air openings 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
T otal 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.
From the table, we interpolate to get 15.1 BHP . Assuming a drive loss of 3% and a motor efficiency of
90%, we can calculate the heat rejection of the supply 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. Required total and sensible capacities are 644 mbh
and 494 mbh, respectively. Using the Cooling Performance Data starting with Tables 2, locate the
table with the correct ambient air temperature. Next,
trace the 83°F entering air dry bulb temperature to
match the 17,500 cfm and 67°F entering wet bulb
temperature condition. The resulting conditions are,
from the table, 645 mbh total cooling capacity and
497 mbh sensible cooling capacity . Thus, a 50-ton
unit is selected.
YORK INTERNATIONAL
11
Cooling Performance Data –
50 Ton Model
T ABLE 2 – COOLING PERFORMANCE DATA – 50 TON MODEL
85° AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM
10000 67 653 548 646 500 635 454 637 416 632 377 626 343
14000 67 665 581 656 523 647 474 647 431 643 388 637 349
17500 67 684 634 672 558 666 505 663 454 660 406 653 359
20000 67 705 695 689 597 686 540 680 479 679 425 672 370
22500 67 715 715 697 616 696 557 689 492 688 435 680 376
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
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 ——
62 640 640 608 608 590 583 582 562 569 514 574 455
72 711 500 708 445 705 399 701 360 699 316 ——
62 654 654 625 625 606 606 594 547 583 498 585 439
72 729 536 721 467 719 418 715 370 712 324 ——
62 680 680 652 652 632 625 612 550 606 497 603 438
72 749 576 736 492 736 439 732 382 726 333 ——
62 710 710 682 682 661 661 633 582 631 523 622 467
72 758 595 742 504 743 449 739 388 732 338 ——
62 715 715 696 610 674 549 643 486 643 429 631 370
95° AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM
10000 67 628 536 630 494 615 445 616 404 609 383 605 331
14000 67 642 569 638 515 627 465 625 419 619 382 615 338
17500 67 665 625 651 547 645 497 640 443 635 382 630 348
20000 67 691 691 665 582 665 532 656 470 653 382 647 360
22500 67 703 703 672 599 674 549 664 483 661 382 655 366
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
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 ——
62 618 618 590 590 569 513 571 481 562 435 562 390
72 684 491 682 432 678 388 676 348 673 306 ——
62 635 635 607 607 586 541 580 500 572 453 571 407
72 701 526 696 458 693 407 690 360 686 315 ——
62 661 661 634 634 612 587 594 531 588 481 586 433
72 720 565 712 486 709 429 705 373 701 325 ——
62 691 691 663 663 641 641 609 565 606 511 602 462
72 729 584 720 500 717 439 712 380 708 329 ——
62 704 704 675 658 655 629 617 556 614 488 610 447
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YORK INTERNATIONAL
FORM 100.50-EG1
T ABLE 2 – COOLING PERFORMANCE DATA – 50 TON MODEL (CONT’D)
105° AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM
10000 6 7 590 513 596 478 589 434 591 390 593 354 589 318
14000 6 7 609 550 608 501 600 454 600 406 601 366 597 326
17500 6 7 638 607 625 537 618 485 615 432 613 384 609 337
20000 6 7 670 670 645 577 638 520 631 461 626 404 623 350
22500 6 7 686 695 654 596 647 537 639 475 632 414 629 356
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
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 ——
62 597 597 573 573 536 498 549 460 544 429 542 384
72 658 483 658 424 653 378 651 338 650 295 ——
62 614 614 589 589 556 527 557 483 553 446 550 397
72 673 512 670 447 667 397 663 350 661 303 ——
62 641 641 614 614 587 571 570 520 567 472 563 419
72 689 545 684 472 682 419 677 364 672 311 ——
62 670 670 642 642 621 621 584 561 582 500 576 443
72 696 560 690 485 690 430 683 371 678 315 ——
62 684 684 655 655 637 644 591 580 590 514 583 455
115° AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM
10000 6 7 494 424 524 387 514 349 515 313 514 281 518 254
14000 6 7 548 509 545 449 541 406 539 359 536 317 537 276
17500 6 7 577 555 557 481 555 435 552 383 548 336 547 288
20000 6 7 609 609 570 517 571 468 566 410 562 357 558 301
22500 6 7 624 624 576 534 579 484 572 423 568 367 563 307
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
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 ——
62 498 498 501 501 442 424 458 349 467 343 467 306
72 592 432 588 370 589 325 585 286 583 246 ——
62 550 550 533 533 498 488 494 434 491 395 489 349
72 608 465 603 397 600 346 600 300 594 253 ——
62 578 578 550 550 527 522 513 478 504 422 500 371
72 625 503 618 427 613 368 616 316 606 261 ——
62 609 609 568 568 560 560 534 528 518 452 513 396
72 633 520 626 441 619 379 623 324 611 265 ——
62 624 624 577 577 575 578 544 548 525 467 520 408
YORK INTERNATIONAL
13
Cooling Performance Data –
55 Ton Model
T ABLE 3 – COOLING PERFORMANCE DATA – 55 TON MODEL
85° AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM
12000 67 677 564 651 511 641 463 642 423 637 382 631 346
16000 67 693 598 661 535 653 484 652 438 649 394 642 353
19250 67 728 677 684 586 680 530 675 472 673 419 666 367
22000 67 750 713 695 613 694 554 688 490 687 433 679 375
24000 67 758 720 701 625 701 565 693 497 692 439 685 378
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
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 ——
62 660 648 616 616 598 598 588 564 576 515 579 456
72 743 512 712 452 709 405 706 363 703 319 ——
62 680 661 634 634 615 587 600 531 591 481 591 421
72 767 564 731 485 731 433 727 378 722 331 ——
62 725 701 673 673 652 652 627 572 624 515 616 458
72 781 592 741 502 742 448 738 387 731 337 ——
62 750 713 694 613 672 554 642 490 641 433 630 375
72 786 604 746 510 747 454 743 390 736 340 ——
62 760 720 701 602 681 534 648 473 649 416 636 357
95° AIR ON CONDENSER COIL
CAPACITY (MBH) AT ENTERING DRY BULB (°F)
CFM
12000 67 651 554 634 504 621 454 621 411 613 382 610 334
16000 67 668 585 643 525 633 476 630 427 624 382 620 341
19250 67 707 671 661 572 659 521 651 462 647 382 642 357
22000 67 728 701 671 597 673 546 663 481 660 382 654 365
24000 67 737 709 675 607 678 556 667 489 665 382 659 369
* Rated performance is at sea level. Cooling capacities are gross cooling capacity.
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 ——
62 641 626 598 598 577 527 575 490 567 444 566 398
72 716 502 687 441 683 394 680 352 677 309 ——
62 661 644 616 616 594 554 585 511 577 462 576 415
72 738 554 708 478 704 422 700 369 696 322 ——
62 705 682 654 654 633 625 605 555 600 502 598 453
72 751 581 719 497 715 438 7 11 379 707 328 ——
62 730 703 675 675 653 653 616 578 613 524 609 473
72 756 593 723 506 720 444 715 383 711 331 ——
62 740 709 675 607 662 556 620 489 618 382 614 369
14
YORK INTERNATIONAL
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