York HFC-410A User Manual
TM
Packaged Rooftop
Air-Conditioning Units
(Simplicity Elite with HFC-410a refrigerant)
FORM 100.50-EG5 (108)
MEA
231-02-E
50 THROUGH 65 TONS
00873VIP
ASHRAE
90.1
COMPLIANT
FORM 100.50-EG5 (108)
Introduction
The Eco2 packaged rooftop – designed to meet the demands of the
market for today and tomorrow.
Better Economy...
Lower total cost of ownership
• High effi ciency Eco2 rooftop units are optimized for
HFC-410a refrigerant. YORK provides the FIRST
standard product offering that meets the latest
ASHRAE 90.1 energy effi ciency requirements.
• Accurate ventilation control ensures that no more
than the proper amount of ventilation air is utilized.
This avoids the energy cost of conditioning excess
outside air and simultaneously monitors all other
unit functions for maximized energy effi ciency.
• Flexible design confi gurations simplify the design
process and allows the Eco2 to be applied to virtually
any building application.
• Accessibility through double-wall access doors, spacious compartments and supportive fl oors improves
serviceability.
• Note that modulating heat is not offered with Elite
controller option.
Simplicity Elite controller Option
Better Ecology...
Indoor air quality features for the indoor environment
• Double-wall construction of the roof, fl oor, doors,
and walls prevents insulation fi bers from entering
the conditioned air. The inner liner also facilitates
periodic cleaning of the unit to prevent harmful buildup of bacteria or contaminants.
• The rooftop unit control center uses microprocessor
logic to analyze and optimize ventilation decisions and
perform demand ventilation, and allow airfl ow compen-
sation to maintain the air quality at a healthy level.
ALARM/CHANGE
PROGRAM
TEST/UP
2 CHARACTER DISPLAY
RS 485 PORT
4 CHARACTER DISPLAY
RS 485 PORT
ADDRESS/DOWN
LED
2
JOHNSON CONTROLS
Table of Contents
FORM 100.50-EG5 (108)
Introduction ................................................................2
Features and Benefi ts ...............................................4
Application Data ........................................................8
Nomenclature ..........................................................13
Physical Data...........................................................14
Altitude and Temperature Corrections .....................17
Cooling Performance Data ......................................19
Supply Fan Data ......................................................23
Component Static Pressure Drops ..........................24
Exhaust Fan Data ....................................................25
Electrical Data .........................................................26
Controls ...................................................................28
General Arrangement Drawings ..............................32
Unit Weights ............................................................36
Guide Specifi cations ................................................38
TABLES
1 Supply-Air-Duct Connection Confi gurations ......9
2 Return-Air-Duct Connection Confi gurations .......9
3 Physical Data ...................................................14
4 Effi ciency Ratings ............................................16
5 Physical Data – Unit EER ................................16
6 Physical Data – Compressors ..........................16
7 Altitude Correction Factors ..............................17
8 Cooling Performance Data – 050 Model ..........19
9 Cooling Performance Data – 051 Model ..........20
10 Cooling Performance Data – 060 Model ..........21
11 Cooling Performance Data – 061 Model ..........22
12 Supply Fan Performance – Forward-Curved ...23
13 Supply Fan Performance – Airfoil ....................23
14 Component Static Pressure Drops ..................24
15 Exhaust Fan Performance ...............................25
16 Compressor Electrical Data .............................26
17 Power Supply Voltage Limits ...........................26
18 Supply and Exhaust Fan Motor
Electrical Data - ODP .......................................27
19 Supply and Exhaust Fan Motor
Electrical Data - TEFC .....................................27
20 Condenser Fan Motor RLA ..............................27
21 Miscellaneous Electrical Data ..........................27
22 Power-Supply-Conductor Size Range .............31
23 Unit Weights ..................................................... 36
24 Unit Center of Gravity ......................................36
25 Unit Corner Weights .........................................37
FIGURES
1 Traditional Overhead VAV Air Delivery
System .............................................................10
2 Altitude/Temperature Conversion Factor .........18
3 Bottom Supply/Bottom Return Drawing ...........32
4 Side Supply/Rear Return Drawing ...................33
5 Bottom Supply/Side Return Drawing ...............34
6 Curb Layout Drawing .......................................35
JOHNSON CONTROLS
3
Features and Benefi ts
FORM 100.50-EG5 (108)
AIRFLOW CONFIGURATIONS
2
Variable-Air-Volume – Eco
single-zone variable-air-volume (VAV) applications.
Supply fans are controlled to the supply duct static
pressure setpoint, which can be reset via a BAS, or
through an analog voltage input on the unit controller
for optimized duct static pressure control. The static
pressure transducer is provided in the rooftop unit, and
5/16” or 1/4” plastic tubing and static pressure sensor
must be supplied by others and installed approximately
3/4 down the longest duct run.
Constant V olume – Eco2 units are available for single-
zone constant volume applications. Control can be used
with a zone sensor, thermostat, or building automation
system.
COOLING AND HEATING CONFIGURATIONS
Cooling Only – For applications where no heat is
required, or heating is provided elsewhere within the
building HVAC system, cooling only units include an
empty discharge plenum. Supply duct connections are
confi gurable for bottom, left or right discharge. The
supply air temperature sensor is included and factoryinstalled.
Staged Gas Heat – For applications requiring gas heat
for morning warm-up, or other heating needs, a staged
natural gas furnace is available. The furnace is located
in the discharge plenum, downstream of the supply fan.
The supply air temperature sensor is located across the
face of the supply duct opening in the unit. Furnaces
are designed in 375 mbh modules with one stage each.
Three are available on the YPAL050-061 with bottom
discharge and two are available on the YPAL050-061
with left-side discharge. Ignition and safety controls are
included and factory-wired.
POWER OPTIONS
Single-point supply with terminal block – This
confi guration is standard, and includes three terminals
for the incoming 3-phase power and is the standard
confi guration for the Eco2 product. It includes the enclosure, terminal-block, and interconnecting wiring to
the compressors, heater and furnace controls, all fans,
etc. In this confi guration, code requires that a means of
disconnect (not provided) must be installed at the site
within line-of-sight of the equipment.
Single-point supply with non-fused disconnect switch
– This option is the same the single-point with terminal
block option except it includes a unit-mounted throughthe-door manual non-fused disconnect switch with an
units are available for
external, lockable handle (in compliance with Article
440-14 of N.E.C.). This option provides a means to
isolate the unit power voltage for servicing. Others must
supply separate external fusing which must comply with
the National Electric Code and/or local codes.
Dual-point supply with terminal block – This option includes enclosure, terminal blocks circuited to the supply
and exhaust fans and control transformer and a second
set of terminal blocks with interconnecting wiring to the
compressors, heat (if applicable) and condenser.
Convenience Outlet – This options includes a powered
115V GFCI convenience outlet that can be used for
powering tools or lights for servicing. A protective cover
plate is included while not in use. The outlet is located
on the bottom left hand corner of the power panel.
CONTROL FEATURES AND OPTIONS
Simplicity Elite Unit Controller – All Eco2 units are
equipped with a factory-installed, programmed and
commissioned unit controller with all I/O capabilities and
control sequences. The controls include all on-board
diagnostic, safety and control features to operate the
rooftop unit. Two RS485 communication ports are included as standard with one alarm output, a shutdown
contact, smoke ventilation contact, analog inputs for
supply air temperature and duct static pressure reset,
along with a variety of other capabilities.
Standard Ambient – YPAL050-061 models operate
down to 40°F as standard.
Low Ambient – This option includes low ambient control
of the fi rst refrigerant circuit down to 0°F through the
use of suction and discharge pressure transducer on
circuit one, and condenser fan speed using a variablefrequency drive on the fi rst condenser fan of circuit one.
Mechanical cooling with circuit two is locked out below
45°F (adjustable).
Flexsys bypass control option is not available with elite
controller.
SENSOR AND THERMOSTAT AND SENSOR
OPTIONS
Wall-Mount Zone Sensor – A thermistor zone sen-
sor for wall mounting. This zone sensor is for sensing
temperature only, and does not include any setpoint
adjustment features.
7-Wire Thermostat – This option is for a ship-loose
thermostat to interface with the Eco2 unit. All models,
YPAL050-061, include an interface for a 7-wire thermostat as standard.
4
JOHNSON CONTROLS
FORM 100.50-EG5 (108)
COMMUNICATIONS
BACnet MSTP (RS-485) Communications – This
communication is available via optional Modlinc Gateway . Communications to the unit are through a twisted
pair, and the wire terminations are on the primary unit
control board.
Modbus RTU Communications – This communication
2
is standard on every Eco
unit and can be used in lieu
of the BACnet communications (only one can be used
at a time).
FILTER OPTIONS
Filter Options – T wo-inch 30% throwaway, cleanable,
carbon or pleated fi lters in an angled rack are avail-
able. For higher fi ltration requirements, optional rigid
fi lter racks are available with twelve-inch 65% or 95%
effi cient rigid fi lters. T wo-inch pre-fi lters are included
with rigid fi lter options. The rigid fi lter rack option is
available without fi lter media where fi eld-supplied fi lters
are required.
OUTSIDE AIR DAMPER OPTIONS
Manual Damper – This option includes a manually
adjustable outside air damper. It is manually adjustable at the unit by setting a mechanical stop between
0-100 percent.
RELIEF SYSTEM
Barometric Relief – Optional building air exhaust shall
be accomplished through barometric relief dampers installed in the return air plenum. The dampers will open
relative to the building pressure. The opening pressure
shall be adjustable via a spring tension adjustment.
Modulating Powered Exhaust with Damper Control–
This option consists of a constant-speed exhaust fan
with a discharge damper that is modulated to control the
fl ow of exhaust air. The damper control logic is based on
the building static pressure setpoint within the rooftop
unit controller. The static pressure transducer is provided in the return plenum of the rooftop unit, and 5/16”
or 1/4” plastic tubing and static pressure sensor must
be supplied by others and installed in a representative
location in the building.
Modulating Powered Exhaust with a VFD – This
option consists of a VFD to modulate the speed of the
exhaust fan to control the fl ow of exhaust air. The VFD
control logic is based on the building static pressure
setpoint within the rooftop unit controller. The static
pressure transducer is provided in the return plenum
of the rooftop unit, and 5/16” or 1/4” plastic tubing and
static pressure sensor must be supplied by others and
installed in a representative location in the building.
SUPPLY FAN OPTIONS
Two-Position – This outside air damper option is con-
trolled to a two positions, opened and closed. Determination of the damper position is based on the occupancy
schedule. In the occupied mode, the outside air damper
is positioned to the manually confi gured point (set by
mechanical stop). In the unoccupied mode, the damper
is fully closed.
Modulating Economizer – This option includes
modulating outdoor air and return air dampers that are
interlocked and positioned by fully modulating, solid
state damper actuators. Control of the damper is via a
standard ambient outdoor air dry bulb sensor, or optional
single or comparative enthalpy controls.
Rain Hoods on Outside Air Intakes – For all options
with outside air intake openings, rain hoods are provided
as standard to keep moisture from entering the equipment. Rain hoods as an integral part of the unit and are
rotated into place.
DWDI Forward-Curved Supply Fan – The standard
supply air blower is a forward-curved supply fan. This fan
is good for medium static pressures and high airfl ows.
DWDI Airfoil Supply Fan – An optional airfoil blade
supply fan is available on all models for higher static
conditions. This option offers higher effi ciency and lower
sound in certain applications.
Fan Skid Isolation – The entire supply fan assembly is
isolated from the unit base with one (standard) or twoinch defl ection springs with optional seismic restraints.
Supply and Exhaust Fan Motors – High effi ciency
ODP, and standard and high effi ciency TEFC motors
are available all meeting the Energy Policy Act of 1992
(EPACT).
Supply Fan VFD and Manual Bypass – For VAV
applications, VFDs are provided to modulate air fl ow.
Optional manual bypass can also be provided to allow
full airfl ow in the event of a VFD failure.
JOHNSON CONTROLS
5
Features and Benefi ts (continued)
FORM 100.50-EG5 (108)
EVAPORATOR SECTION
Double Wall Construction – Double-wall construction
is the standard construction of the Eco
powder coated pre-fabricated outer panels and corner
post for maximum exterior surface protection.
Factory Shrink-wrap – Eco2 rooftop units are shipped
from the factory with factory-fresh shrink-wrap packaging. No longer does the contractor need to worry about
dirt and debris clogging up condenser coils or moisture
leaking into the air handler on the units way to the job
site or rigging yard.
Copper Fins – For more extreme climates that aggressively can attack aluminum, copper tube evaporator coils
with copper fi ns are available. (This is not recommended
for units in areas where they may be exposed to acid
rain or environments where ammonia is present)
CONDENSER FEATURES AND OPTIONS
Scroll Compressors – Reliable, effi cient, 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.
2
and incorporates
Condenser Fan Motors – The condenser fan motors
used on the Eco2 unit are Totally Enclosed Air Over
(TEAO) to provide maximum durability through any
season.
Hot Gas Bypass – This options permits continuous,
stable operation at capacities below the minimum step
of unloading by introducing an artifi cial load on the
evaporator. For models YPAL050-061, it is used on the
lead circuit and standard on VAV units.
Replaceable Core Liquid Line Driers – Liquid line
driers are standard on the Eco2 rooftop unit. An option
is provided for replaceable core driers.
Copper Fins – For more extreme climates that aggressively can attack aluminum, copper tube condenser coils
with copper fi ns are available. (This is not recommended
for units in areas where they may be exposed to acid
rain or environments where ammonia is present)
Pre-Coated Fins – An epoxy-coated aluminum fi n stock
to guard from corrosive agents and insulate against
galvanic potential. Recommended for mild seashore or
industrial locations.
Post-Coated Fins – Technicoat coil-coating process
used on condenser coils for seashore and other corrosive applications (with the exception of strong alkalis,
oxidizers, wet bromide, chlorine and fl uorine in concen-
trations greater than 100ppm).
Compressor Sound Blankets – Optional compressor
acoustic sound blankets are available for sound sensitive applications.
Multiple Compressor Staging – Through the use of the
scroll compressor, the Eco2 has the ability to stage its
cooling by enabling and disabling multiple single stage
compressors on multiple circuits. These compressors
are manifolded together in pairs on a single refrigeration circuit.
Compressor Circuiting – the Eco2 is designed so that
only 2 scroll compressors are in tandem within one refrigeration circuit. This means more reliable compressors,
and less equipment down time. With multiple circuits, if
a compressor should ever fail on one circuit, the other
circuit will remain operational to work to maintain occupied loads. The Eco2 system has 2 circuits in a unit.
6
ROOF CURBS
Partial perimeter roof curbs – This option includes a
knock-down 14” high roof curb for use with wood nailer
(by others). Roof curb supports the air handling section
with a separate support under the condenser end.
CABINET FEATURES AND OPTIONS
Double-Wall Access Doors - Full-sized access doors
provide easy access into the unit for routine maintenance
and inspection. Solid wall liners encase insulation and
prevent damage and erosion into the airstream.
Industry-leading, 1,000-hour, salt-spray rating, per
ASTM B117, keeps unit in superior condition.
JOHNSON CONTROLS
FORM 100.50-EG5 (108)
ACCESSORIES
Filter Switch – An optional dirty fi lter alarm can be pro-
vided that will provide an alarm when the fi lters require
cleaning.
Magnahelic Filter Pressure Gauge – On units
equipped with downstream fi ltration, a magnahelic fi lter
gauge is included and visible on the exterior of the unit.
The fi lter gauge measures the air pressure drop for
through the rigid fi lter bank to indicate when replace-
ment is required.
JOHNSON CONTROLS
7
Application Data
FORM 100.50-EG5 (108)
GENERAL
2
The Eco
air conditioning units are designed for outdoor
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
for seashore locations or other harsh environments.
• The unit should be installed on a roof that is structur-
ally strong enough to support the weight of the unit
with a minimum of defl ection. 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 build-
ing fl ue 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, 8-feet on one side for coil
servicing, 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.
LOCATION
Of the many factors that can effect the location of
equipment, some of the most important to consider are
Structural, Acoustical and Service clearances. Proper
attention should be made at the design stage to ensure
proper structural support. In cases where equipment is
being replaced, be aware of building design to insure
support is adequate for the application.
The next most important consideration in applying roof
top equipment is that of sound from the equipment.
Special care should be made to keep the roof top unit
away from sound sensitive areas such as conference
rooms, auditoriums and executive offi ces and any other
room that may have potential for tenant occupancy . Possible locations could be above hallways, mechanical or
utility rooms.
8
Finally, service clearances should be maintained in
rooftop design to insure safe access to the unit. Unit
clearances are designed so that technicians have
enough space between units, building walls, and edges
of building to gain access safely . In cases where space
is limited, please call your local YORK representative
for additional information.
96"
NOTE:
1. Under certain conditions these clearances may be encroached upon.
2. This is a visual reference for all Eco
2
units.
LD08044
RIGGING
Proper rigging and handling of the equipment is mandatory during unloading and setting it into position to retain
warranty status.
Spreader bars must be used by cranes to prevent damage to the unit casing. All lifting lugs must be used when
lifting the rooftop unit. Fork lifts will damage the rooftop
unit and are not recommended. 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.
UNIT PLACEMENT
• Elevated – Elevated roof curbs or dunnage steel
can be used to support the unit in order to raise it
to specifi c heights. When this type of placement
is required, be sure to keep unit access in mind.
Cat-walks or other forms of unit access may be
required to one or both sides of the unit, depending on your area of the country and the local codes
that are enforced. Please check with local offi cials
to ensure the application conforms to local codes
and regulations.
• 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 onepiece concrete slab with footers extended below
the frost line is highly recommended. Additionally,
the slab should be isolated from the main building
foundation to prevent noise and vibration transmission to the building structure. For ground level
installations, precautions should be taken to protect
the unit from tampering by , or injury to, unauthorized
JOHNSON CONTROLS
FORM 100.50-EG5 (108)
persons. Erecting a fence around the unit is common
practice.
• Roof curb – YORK offers optional roof curbs
2
designed specifi cally for the Eco
footprint. This
curb comes as an open condenser model and is
shipped disassembled and requires fi eld assem-
bly and installation. For bottom supply and return
openings, the curbs have matching connections to
ease installation. A pipe chase that matches the
rooftop unit pipe chase is also included in the curb
footprint for through-the-curb utility connections.
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.
TABLE 1 – SUPPLY-AIR DUCT-CONNECTION CONFIGURATIONS
Supply Air
Bottom Left Right
N/A
N/A N/A
50-65 Tons
Unit Confi guration
Cooling only
Cool/gas heat 375-750 MBH
Cool/gas heat 1,125 MBH
UNIT ORIENTATION
For applications with multiple rooftop units located in
close proximity on the roof, the orientation of the unit
may be important to reduce the potential for re-entrainment of outside airfl ow. Regardless of the outside air and
exhaust air openings on a unit, all rooftop applications
can permit recirculation of exhaust air to the return, if
applied improperly.
HORIZONT AL APPLICATIONS
The spectrum of applications for roof top units in today’s
market is continuing to grow wider by the day. Flexibility in unit design and construction is a must in today’s
market in order to insure safe and sound applications of
HV AC equipment. The Eco2 has been designed for specifi c application of horizontal supply and return airfl ow
taking the guess work out of unit application by building
a unit specifi c to these needs. If the application calls for
horizontal supply and return air, YORK can ship it from
the factory as a horizontal unit. This option elevates the
need for fi eld modifi cation of equipment, saving time
and money . The Eco2 can support a left discharge on all
units except 1,125 MBH gas, and/or right discharge on
all cooling-only units. Return air can be brought through
the end or side return air inlet making the unit specifi c
to building needs.
TABLE 2 – RETURN-AIR DUCT-CONNECTION CONFIGURATIONS
Return Air
Bottom Left Rear
N/A
N/A
50-65 Tons
Unit Confi guration
No exhaust
Barometric relief damper
Powered exhaust fan
DUCT CONSIDERATIONS
Unlike competitive units where air can leave the rooftop
unit stratifi ed across the width of the unit, the Eco2 unit
suffi ciently mixes airfl ow to ensure consistent air tem-
perature from the unit. No special T ee considerations are
required and the unit may be oriented either way.
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 suffi cient for the cooling
demand, mechanical cooling will stage on as necessary
until the cooling load is met.
Dual (comparative or differential) enthalpy operation is
the most accurate and effi cient means of economizer
operation. The unit controller monitors the return and
outside air energy content, and selects the lower of the
two for operation.
NOTE:
This diagram is provided as a visual reference of the Eco
data for exact size & location of panels and openings.
JOHNSON CONTROLS
2
discharge & return air openings & locations for all sizes. Please refer to the dimensional
LD08045
9
Application Data (continued)
FORM 100.50-EG5 (108)
VAV SUPPLY AIR PRESSURE CONTROL
Traditional packaged rooftop systems use inlet guide
vanes (IGVs) for duct static pressure control. These
control supply duct pressure by modulating dampers
(introducing losses and ineffi ciencies) on the inlet of the
fan, open and closed. YORK’s variable frequency drives
(VFDs) offer superior fan speed control and quieter,
energy effi cient operation.
2
For V AV applications, the YORK Eco
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
benefi ts of quieter and more effi cient operation when
compared to IGV.
unit uses a VFD
potential. It is used for mild seashore or industrial
locations. This can provide corrosion resistance
comparable to copper fi n coils in typical seashore
locations.
• Post-Coated Condenser Fins – Technicoat (a
post-coated application of epoxy) can be used for
seashore and other corrosive applications with the
exception of strong alkaloides, oxidizers, wet bromide, chlorine and fl uorine 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 PRESSURE CONTROL SYSTEMS
Building pressure control systems are often necessary when economizers are used to bring in outdoor
air. Without proper building exhaust, the building may
become over pressurized. The pressure control system
maintains the proper building pressure by expelling the
appropriate amount of air from the building.
FIG. 1. TRADITIONAL OVERHEAD VAV AIR
DELIVERY SYSTEM
HARSH ENVIRONMENTS – CONDENSER AND
EVAPORATOR COIL PROTECTION
For harsh environmental conditions such as seashore
applications, YORK offers three types of coil protection:
copper fi n material, black fi n and Technicoat coatings.
YORK recommends that for corrosive environments that
copper fi ns 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 fi n or T echnicoat coating be
used for maximum protection.
• Copper-Fin Evaporator and Condenser Coil
– Copper fi ns 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 fi n coating
(yellow fi n for evaporator fi ns) is pre-coated appli-
cation epoxy on aluminum fi n stock to guard from
corrosive agents and insulate against galvanic
Exhaust/relief fans – In this application, a powered
exhaust fan may be suitable, however careful consideration of the fan type is necessary. YORK offers a
centrifugal powered exhaust fan to perform this function.
Some manufacturers use a propeller exhaust fan, which
cannot handle the static pressure requirements.
For systems with moderate to low return static pressure,
an exhaust fan is recommended. The benefi t of the ex-
haust fan is that it does not run all of the time, and may
facilitate compliance with the ASHRAE 90.1 fan motor
horsepower requirement.
The exhaust fan operates in parallel with the supply
fan. In this arrangement, the supply fan handles the full
static pressure requirements of the system. For normal
building pressure control, the exhaust fan operates to
draw air from the return plenum and exhaust it out of
the building.
The exhaust fan confi guration is available in two forms,
modulating and non-modulating. Modulating is the most
common and recommended for the majority of applications, while non-modulating should be used with in only
certain circumstances.
In the modulating exhaust system, the volume of airfl ow
exhausted from the building is proportional to the entering volume of outside air. Control is accomplished via
either a discharge damper or a variable-frequencydrive
(VFD). YORK recommends the use of a VFD to reduce
energy consumption, sound levels and improved reliability due to fewer moving parts.
10
JOHNSON CONTROLS
FORM 100.50-EG5 (108)
In the non-modulating exhaust system, the exhaust airfl ow is constant whenever the exhaust fan is operating.
This type of control should only be used to either assist
a smoke purge system or when a system requires a
constant volume of exhaust airfl ow.
ACOUSTICAL CONSIDERATIONS
2
The Eco
unit is designed for lower sound levels than
competitive units by using fl exible fan connections, fan
spring isolators, double-wall construction, multiple fan
options, and lower speed and horsepower fans. For
V AV applications, VFDs are used instead of inlet guide
vanes. Additional sound attenuation can be obtained
using compressor sound blankets and fi eld-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.
JOHNSON CONTROLS
11
FORM 100.50-EG5 (108)
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12
JOHNSON CONTROLS
Nomenclature
X :Standard Product, IPU
e
16
15
14
Opening
:Revision Level F (initial)
B:Bottom Return
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nruteR ediS:SnruteR mottoB:BN
L:Left Return
ylppuS tfeL:LXH S/SG
FORM 100.50-EG5 (108)
12 13
10
9
7 8
5 6
Voltage
R
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i
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8 :575/3/60 B :Special Product, Simplicity Elite
5
B :R-407C :208/3/60
:Constant Volume
:VAV, VFD
:Flexsys
F
V F
C
:Cooling Only
:Staged Natural Gas Heat
:Staged Natural Gas Heat,
C R:Rear Return
:Hot Water Heat
:Full Modulating Gas Heat
:Electric Heat
F :Full Modulating Gas Heat, S/S HX
EHS
M
:Steam Heat
JOHNSON CONTROLS
4
3
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1 2
Base Type laicepSngiseDnruteRsgninepO ylppuStnaregirfe
:Packaged Rooftop 0 5 1 :55 Ton Capacity C :R-22 :230/3/60 S :Special Product, IPU
L :Scroll 0 6 1:65 Ton Capacity
A :Air Cooled 0 6 0:60 Ton Capacity E :R-410A 6 :460/3/60 A :Standard Product, Simplicity Elit
P
Y :YORK 0 5 0 :50 Ton Capacity
13
FORM 100.50-EG5 (108)
Physical Data
TABLE 3 – PHYSICAL DATA
MODEL 050 051 060 061
General Data
Length without hood (inches) 339 339 339 339
Width (inches) 92 92 92 92
Height (inches) 82 82 82 82
Compressor Data
Quantity 4 4 4 4
Type Scroll Scroll Scroll Scroll
Unit Capacity Steps 4 4 4 4
R410a Charge (SYS 1/2) (lb-oz) 50 / 50 50 / 50 58 - 11 / 58 - 11 58 - 11 / 58 - 11
Supply Fan
Quantity 1 1 1 1
Type FC FC FC FC
Size 28 - 28 28 - 28 28 - 28 28 - 28
Motor Size Range (HP) 10 - 40 10 - 40 10 - 40 10 - 40
Air Flow Range (CFM) 10,000 - 22,500 10,000 -22,500 12,500 - 24,000 12,500 - 24,000
Static Pressure Range (Total) 1.0" - 6.0" 1.0" - 6.0" 1.0" - 6.0" 1.0" - 6.0"
Optional Supply Fan
Quantity 1 1 1 1
Type AF AF AF AF
Size 28 28 28 28
Motor Size Range (HP) 10 - 40 10 - 40 10 - 40 10 - 40
Air Flow Range (CFM) 10,000 - 24,000 10,000 - 24,000 12,500 - 24,000 12,500 - 24,000
Static Pressure Range (Total) 1.0" - 8.0" 1.0" - 8.0" 1.0" - 8.0" 1.0" - 8.0"
Exhaust Fan
Quantity Fans/Motors 2 / 1 2 / 1 2 / 1 2 / 1
Type FC FC FC FC
Size 18 - 18 18 - 18 18 - 18 18 - 18
Motor Size Range (HP) 5 - 20 5 - 20 5 - 20 5 - 20
Air Flow Range (CFM) 4,000 - 22,500 4,000 - 22,500 4,000 - 24,000 4,000 - 24,000
Static Pressure Range (Total) 0.1" - 1.5" 0.1" - 1.5" 0.1" - 1.5" 0.1" - 1.5"
Evaporator Coil
Size (square feet) 52 52 52 52
Rows/FPI 3 / 17 3 / 17 4 / 17 4 / 17
Condenser Coil
Size (square feet) 88 88 88 88
Rows/FPI 2 / 17 2 / 17 3 / 17 3 / 17
Condenser Fans
Quantity 4 4 4 4
Type Prop. Prop. Prop. Prop.
Diameter (inches) 36 36 36 36
Motor HP 2 2 2 2
Filters - 2" throwaway (pre-fi lter position - angled)
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) 61.6 61.6 61.6 61.6
Filters - 2" cleanable (pre-fi lter position - angled)
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% effi cient (pre-fi lter position - angled)
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
14
JOHNSON CONTROLS
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