Attachment 11 Installation O and M York Condensing Units.pdf

PDF 9 MB Posted Dec 11, 2025

Attached to: Dome Maintenance Minot AFB
Solicitation number: FA452825QFH02
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About this file

Written by GovTribe AI · Dec 11, 2025

This document is an Installation, Operation, and Maintenance Manual for Johnson Controls YLUA Air-Cooled Scroll Condensing Units, covering models ranging from 78 to 160 tons (273 to 560 kW) designed for outdoor installation. The manual provides comprehensive technical details for air conditioning applications, featuring hermetic scroll compressors, liquid coolers, air-cooled condensers, and a weather-resistant microprocessor control center. The units are compatible with R-410A and R-454B refrigerants, and include advanced features such as conditioned-based maintenance programs, native BACnet and Modbus communication capabilities, and options for high and low ambient temperature operations.

The manual offers extensive guidance on installation, commissioning, operation, maintenance, and troubleshooting, including detailed specifications for electrical connections, refrigerant piping, fan control, capacity management, and system controls. Key technical components include suction-gas cooled scroll compressors with compliant scroll designs, corrosion-resistant condenser coils with aluminum fins, and direct-drive fan motors with independent motors positioned for vertical air discharge. The document provides precise technical data, wiring diagrams, temperature and pressure conversion charts, and step-by-step instructions for maintenance procedures, emphasizing safety protocols and operational best practices for technicians and service personnel.

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YLUA0078 to YLUA0158 Air-Cooled Scroll Condensing Units

Style A and B (60 Hz) 80 ton to 160 ton 281 kW to 522 kW

R-410A and R-454B

035-22868-000

Air-Cooled Scroll Condensing Units

Installation, Operation, Maintenance Supersedes 150.73-NM1 (1223) Form 150.73-NM1 (724)

Issue Date:

July 03, 2024

JOHNSON CONTROLS2

FORM 150.73-NM1

ISSUE DATE: 07/03/2024

This equipment is a relatively complicated apparatus.

During rigging, installation, operation, maintenance, or service, individuals may be exposed to certain com-ponents or conditions including, but not limited to:

heavy objects, refrigerants, materials under pressure, rotating components, and both high and low voltage.

Each of these items has the potential, if misused or handled improperly, to cause bodily injury or death. It is the obligation and responsibility of rigging, instal-lation, and operating/service personnel to identify and recognize these inherent hazards, protect themselves, and proceed safely in completing their tasks. Failure to comply with any of these requirements could result in serious damage to the equipment and the property in

Important!

Read before proceeding!

General safety guidelines which it is situated, as well as severe personal injury or death to themselves and people at the site.

This document is intended for use by owner-authorized rigging, installation, and operating/service personnel. It is expected that these individuals possess independent training that will enable them to perform their assigned tasks properly and safely. It is essential that, prior to performing any task on this equipment, this individual shall have read and understood the on-product labels, this document and any referenced materials. This in-dividual shall also be familiar with and comply with all applicable industry and governmental standards and regulations pertaining to the task in question.

Safety symbols The following symbols are used in this document to alert the reader to specific situations:

Indicates a possible hazardous situation which will result in death or serious injury if proper care is not taken.

Indicates a potentially hazardous situa-tion which will result in possible injuries or damage to equipment if proper care is not taken.

Identifies a hazard which could lead to damage to the machine, damage to other equipment and/or environmental pollu-tion if proper care is not taken or instruc-tions and are not followed.

Highlights additional information useful to the technician in completing the work being performed properly.

External wiring, unless specified as an optional connection in the manufacturer’s product line, is not to be connected inside the control cabinet. Devices such as relays, switches, transducers and controls and any external wiring must not be installed inside the micro panel. All wiring must be in accor-dance with Johnson Controls’ published specifications and must be performed only by a qualified electrician. Johnson Controls will NOT be responsible for damage/problems resulting from improper connections to the controls or application of improper control signals. Failure to follow this warn-ing will void the manufacturer’s warranty and cause serious damage to property or personal injury.

JOHNSON CONTROLS 3

ISSUE DATE: 07/03/2024

Changeability of this document

In complying with Johnson Controls’ policy for con-tinuous product improvement, the information con-tained in this document is subject to change without notice. Johnson Controls makes no commitment to update or provide current information automatically to the manual or product owner. Updated manuals, if applicable, can be obtained by contacting the nearest Johnson Controls Service office or accessing the John-son Controls Knowledge Exchange website at https:// docs.johnsoncontrols.com/chillers/.

It is the responsibility of rigging, lifting, and operating/ service personnel to verify the applicability of these documents to the equipment. If there is any question regarding the applicability of these documents, rig-ging, lifting, and operating/service personnel should verify whether the equipment has been modified and if current literature is available from the owner of the equipment prior to performing any work on the chiller.

AFFECTED PAGES DESCRIPTION

33 - 34 Added two new warnings related to cutting knockouts for conduit entry.

Revision notes

Revisions made to this document are indicated in the following table. These revisions are to technical information, and any other changes in spelling, grammar, or formatting are not included.

Associated literature

MANUAL DESCRIPTION FORM NUMBER

Installation and Start-up Checklist 150.73-CL2

Limited Warranty Engineered Systems Equipment 50.05-NM2

Shipping Damage Claims 50.15-NM

Chiller A2L Refrigerant Application Data 160.00-AD10

Working with chiller vessels which are designed to contain contents under pressure must only be conducted by fully qualified technicians who have been certified in accordance with EPA Section 608 of the Clean Air Act requirements for the US or equivalently the Federal Halocarbon Regulations and the Refrigerant Code of Practice for Canada. This equipment is only intended for installation in locations that are not accessible to the general public. Further, this equipment is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge. Refrigerant R-454B is classified as an A2L refrigerant and must be handled in accordance with all governing regulations. Failure to meet this requirement can result in damage to equipment, release of refrigerant into the environment, contamination of the operating space for the equipment and pose a risk of personal injury or death. It is the responsibility of any service technician or operator to adhere to these requirements. See 160.00-AD10 for greater details regarding the application and use of A2L refrigerants.

JOHNSON CONTROLS4

ISSUE DATE: 07/03/2024

E = R-410A J = R-454B

Z = Standard Efficency Unit Y = High Efficency Unit

�L = York Scroll

Nomenclature

See Nomenclature (Pin) on page 23 for additional information on PIN.

Conditioned-based maintenance

Traditional chiller maintenance is based upon assumed and generalized conditions. In lieu of the traditional maintenance program, a Johnson Controls YORK Conditioned Based Maintenance (CBM) program can be substituted. This CBM service plan is built around the specific needs for the chiller, operating conditions, and annualized impact realized by the chiller. Your lo-cal Johnson Controls Branch can propose a customized

Planned Service Agreement that leverages real time and historical data, delivering performance reporting, corrective actions required and data enabled guidance for optimal operation and lifecycle assurance. The pro-gram will include fault detection diagnostics, operation code statistics, performance based algorithms and ad-vance rules based rationale delivered by the Johnson Controls Connected Equipment Portal.

JOHNSON CONTROLS 5

ISSUE DATE: 07/03/2024

Table of contents

Section 1: General equipment information and safety Introduction Compressors Condenser Refrigerant circuit Warranty Safety and quality About this manual Misuse of equipment

Section 2: Product description Introduction General system description Refrigerant circuit Microcomputer control center High ambient kit Communications Power panel Accessories and options Unit components Nomenclature (Pin) Refrigerant flow diagram Process and instrumentation diagram

Section 3: Handling and storage Delivery and storage Inspection Unit rigging

Section 4: Installation Installation checklist Handling Location and clearances Spring isolators: optional Compressor mounting Pipework arrangement Ductwork connection Wiring Compressor heaters Relief valves High pressure cutout Electrical wiring Compressor heaters Refrigerant piping Oil traps Refrigerant charge Filter driers, sight glasses, and TXV’S Refrigerant piping notes Control wiring

JOHNSON CONTROLS6

ISSUE DATE: 07/03/2024

Section 5: Technical data Operational limitations Physical data Electrical data Wiring Diagrams Power options connection diagram Wiring Micro panel connections Dimensions Clearances Weight distribution and isolator mounting positions Isolator information

Section 6: Commissioning Commissioning Preparation: power off Preparation: power on

Section 7: Unit controls Introduction Microprocessor board Unit switch Display Keypad Battery back-up Transformer Single system select and programming number of compressors Status key Display/print keys Entry keys Setpoints keys Unit keys

Section 8: Unit operation Capacity control Suction pressure limit controls Discharge pressure limit controls Discharge air temperature control Suction Pressure control System lead/lag Compressor lead/lag Anti-recycle timer Anti-coincidence timer Evaporator blower control Pumpdown control Condenser fan control Load limiting Compressor run status Alarm status BAS/EMS discharge air temperature reset using a voltage or current signal

Table of contents (cont’d)

JOHNSON CONTROLS 7

ISSUE DATE: 07/03/2024

Section 9: Service and troubleshooting Clearing history buffers Service mode outputs Service mode condensing unit configuration Service mode analog and digital inputs Control inputs and outputs Checking inputs and outputs Optional printer installation

Section 10: Maintenance Important Compressors oil level check Oil analysis Condenser fan motors Condenser MCHX Microchannel coil cleaning Cleaning procedure required for standard and environment guard microchannel coils Cleaning procedure for environment guard premium microchannel coils Steps to touch-up small sections of finned coil surface Steps to touch-up end (dead) tubes and condenser coil headers:

Materials required:

Chilled liquid system maintenance Scheduled maintenance Chiller / compressor operating log Evaporator freeze damage Glycol concentration Winterization Before applying power to the chiller, ensure the chilled liquid system is filled Removing water/glycol from the evaporator Operating parameters On-board battery backup Brazed plate heat exchanger (evaporator) heater Overall unit inspection BAS control BACnet and Modbus data communication

Table of contents (cont’d)

JOHNSON CONTROLS8

ISSUE DATE: 07/03/2024

List of figures

FIGURE 1 - Compressors��15 FIGURE 2 - Unit Components Front��20 FIGURE 3 - Power Panel Components��21 FIGURE 4 - Power Panel / Control Components��22 FIGURE 5 - Refrigerant Flow Diagram��27 FIGURE 6 - Process and Instrumentation Diagram��28 FIGURE 7 - Unit Rigging��29 FIGURE 8 - �Single-Point Supply Connection – Terminal Block, Non-Fused Disconnect Switch

Or Circuit Breaker��40 FIGURE 9 - Discharge Air Sensor Field Wiring��40 FIGURE 10 - Control Wiring��41 FIGURE 11 - Elementary Wiring Diagram��68 FIGURE 12 - Power Options Connection Diagram��78 FIGURE 13 - Single Point and Dual Point Wiring��82 FIGURE 14 - Wiring��84 FIGURE 15 - Micro Panel Connections��86 FIGURE 16 - Elementary Diagram��88 FIGURE 17 - Unit Clearances – All Models��95 FIGURE 18 - Sample Printout Supplied in the Isolator Package and in the Chiller Panel Literature Packet.��96 FIGURE 19 - Status Key Messages Quick Reference List�� 116 FIGURE 20 - Operation Data��120 FIGURE 21 - Setpoints Quick Reference List��132 FIGURE 22 - Unit Keys Programming Quick Reference List��138 FIGURE 23 - Discharge Air Temperature Control��140 FIGURE 24 - Suction Pressure Control��141 FIGURE 25 - YLUA0078 – YLUA0095 Fan Location (Typical)��143 FIGURE 26 - YLUA0098 – YLUA0130 Fan Location��145 FIGURE 27 - YLUA0148 – YLUA0158 Fan Location��146 FIGURE 28 - Microboard Layout��152 FIGURE 29 - �I/O Board Relay Contact Architecture��156 FIGURE 30 - Printer to Microboard Electrical Connections��157

JOHNSON CONTROLS 9

ISSUE DATE: 07/03/2024

List of tables

TABLE 1 - Product identification number (Pin) ��23 TABLE 2 - Fitting Equivalent Lengths��36 TABLE 3 - Refrigerant Piping Charges��36 TABLE 4 - Miscellaneous Liquid Line Pressure Drops��36 TABLE 5 - Refrigerant Line Connections��37 TABLE 6 - Refrigerant Line Pressure Drops (English)��39 TABLE 7 - Voltage Limitations��43 TABLE 8 - Physical Data (English)��44 TABLE 9 - Micro Panel Power Supply��45 TABLE 10 - Voltage Range��45 TABLE 11 - Standard Efficiency Unit Electrical Data (4 compr) R-410A, single point��46 TABLE 12 - Standard Efficiency Unit Electrical Data (5 compr) R-410A, single point��47 TABLE 13 - Standard Efficiency Unit Electrical Data (6 compr) R-410A, single point��49 TABLE 14 - High Efficiency Unit Electrical Data (5 compr) R-410A, single point��49 TABLE 15 - High Efficiency Unit Electrical Data (6 compr) R-410A, single point��49 TABLE 16 - Standard Efficiency Unit Electrical Data (4 compr) R-454B, single point��50 TABLE 17 - Standard Efficiency Unit Electrical Data (5 compr) R-454B, single point��51 TABLE 18 - Standard Efficiency Unit Electrical Data (6 compr) R-454B, single point��51 TABLE 19 - High Efficiency Unit Electrical Data (5 compr) R-454B, single point��53 TABLE 20 - High Efficiency Unit Electrical Data (6 compr) R-454B, single point��53 TABLE 21 - Standard Efficiency Unit Electrical Data (4 compr) R-410A, dual point��54 TABLE 22 - Standard Efficiency Unit Electrical Data (5 compr) R-410A, dual point��54 TABLE 23 - Standard Efficiency Unit Electrical Data (6 compr) R-410A, dual point��54 TABLE 24 - High Efficiency Unit Electrical Data (5 compr) R-410A, dual point��57 TABLE 25 - High Efficiency Unit Electrical Data (6 compr) R-410, dual point��57 TABLE 26 - Standard Efficiency Unit Electrical Data (4 compr) R-454B, dual point��58 TABLE 27 - Standard efficiency unit electrical data (5 compr) R-454B, dual point��58 TABLE 28 - Standard Efficiency Unit Electrical Data (6 compr) R-454B, dual point��59 TABLE 29 - High Efficiency Unit Electrical Data (5 compr) R-454B, dual point��61 TABLE 30 - High Efficiency Unit Electrical Data (6 compr) R-454B, dual point��61 TABLE 31 - Lug Sizing��62 TABLE 32 - Cooling Setpoints Programmable Limits and Defaults��131 TABLE 33 - Program and Defaults��131 TABLE 34 - Discharge Air Temperature Control For 5 and 6 Compressors (7 and 8 Steps)��140 TABLE 35 - Discharge Air Temperature Control For 4 Compressors (6 Steps)��140 TABLE 36 - �YLUA0078 – YLUA0095 Condenser Fan Control Using Outdoor Ambient Temperature and Discharge Pressure��143 TABLE 37 - YLUA0078 – YLUA0095 Condenser Fan Control Using Discharge Pressure Only��143 TABLE 38 - �YLUA0078 – YLUA0095 Low Ambient Condenser Fan Control –

Discharge Pressure Control��144 TABLE 39 - YLUA0098 – YLUA0130 Condenser Fan Control��145 TABLE 40 - YLUA0148 – YLUA0158 Condenser Fan Control��146 TABLE 41 - Compressor Operation – Load Limiting��147 TABLE 42 - I/O Digital Inputs��151 TABLE 43 - I/O Digital Outputs��151 TABLE 44 - I/O Analog Inputs��151 TABLE 45 - I/O Analog Outputs��151 TABLE 46 - Outdoor Air SensorTemperature/Voltage/Correlation��153 TABLE 47 - Discharge Air Temperature Sensor Temperature/Voltage/Resistance Correlation��154 TABLE 48 - Pressure Transducers��155 TABLE 49 - Troubleshooting��158 TABLE 50 - BAS Received Data��166 TABLE 51 - BAS Transmitted Data��166 TABLE 52 - BAS Operational and Fault Codes��168

JOHNSON CONTROLS10

ISSUE DATE: 07/03/2024

TABLE 53 - Minimum, Maximum and Default Values��170 TABLE 54 - Real Time Error Numbers��170 TABLE 55 - Serial Communication Analog Value Data��171 TABLE 56 - Serial Communication Binary Value Data��171 TABLE 57 - Serial Communication Analog Input Data��171 TABLE 58 - Serial Communication Binary Input Data��173 TABLE 59 - Temperature Conversion Chart - Actual Temperature��174 TABLE 60 - Temperature Conversion Chart Differential Temperatures��174 TABLE 61 - Pressure Conversion Chart - Gauge Or Differential��175 TABLE 62 - R-410A Pressure-Temperature Chart��175 TABLE 63 - R-454B pressure-temperature chart��176

List of tables

JOHNSON CONTROLS 11

ISSUE DATE: 07/03/2024

Section 1: General equipment information and safety

Before operating the unit, refer to Chiller A2L Refrigerant Application Data, Form

160.00-AD10.

Introduction The 78 ton to 160 ton (273 kW to 560 kW) YLUA condensing unit models are shipped complete from the factory ready for field installation.

The unit is pressure-tested, evacuated and given a ni-trogen holding charge and includes an initial oil charge (R-410A or R-454B refrigerant supplied by others).

After assembly, an operational test is performed to en-sure that each control device operates correctly.

The unit structure is heavy-gauge, galvanized steel.

This galvanized steel is coated with baked-on powder paint, which, when subjected to ASTM B117 1000 hour, salt spray testing, yields a minimum ASTM 1654 rating of 6. Units are designed in accordance with NFPA 70 (National Electric Code), ASHRAE/ANSI 15 Safety code for mechanical refrigeration, and are cETL listed. All units are produced at an ISO 9000-registered facility.

Compressors The condensing unit has suction-gas cooled, hermet-ic, scroll compressors. The compressors incorporate a compliant scroll design in both the axial and radial direction. All rotating parts of the compressors are statically and dynamically balanced. A large internal volume and oil reservoir provides greater liquid toler-ance. Compressor crankcase heaters are also included for extra protection against liquid migration.

Condenser Coils – Fin and tube condenser coils of seamless, inter nally-enhanced, high-condensing-coefficient, corro-sion resistant copper tubes are arranged in staggered rows, mechanically expanded into aluminum fins. Inte-gral subcooling is included. The design working pres-sure of the coil is 650 psig (45 barg).

Fans – The condenser fans are composed of corro sion-resistant aluminum hub and glass-fiber-reinforced polypropylene composite blades molded into a low noise airfoil section. They are designed for maximum efficiency and are statically and dynamically balanced for vibration free operation. They are directly driven by independent motors, and positioned for vertical air dis-charge. The fan guards are constructed of heavy-gauge, rust-resistant, coated steel. All blades are statically and dynamically balanced for vibration-free operation.

Motors – The fan motors are Totally Enclosed Air- Over, squirrel-cage type, current protected. They fea-ture ball bearings that are double-sealed and perma-nently lubricated.

Refrigerant circuit Two independent refrigerant circuits will be furnished on each unit. All unit piping will be copper, with brazed joints. The liquid line will include a field connection shutoff valve with charging port located on each con-denser circuit. Suction line connections are provided on each refrigeration circuit.

All expansion valves, liquid line solenoid valves, filter driers, sight glasses, refrigerant, and refrigerant field piping are supplied and installed by others.

Warranty Johnson Controls warrants all equipment and materials against defects in workmanship and materials for a pe-riod of eighteen months from date of shipment, unless labor or extended warranty has been purchased as part of the contract.

The warranty is limited to parts only replacement and shipping of any faulty part, or sub-assembly, which has failed due to poor quality or manufacturing errors. All claims must be supported by evidence that the failure has occurred within the warranty period, and that the unit has been operated within the designed parameters specified.

All warranty claims must specify the unit model, serial number, order number and run hours/starts. Model and serial number information is printed on the unit identi-fication plate.

The unit warranty will be void if any modification to the unit is carried out without prior written approval from Johnson Controls.

JOHNSON CONTROLS12

ISSUE DATE: 07/03/2024Section 1: General equipment information and safety

For warranty purposes, the following conditions must be satisfied:

• The initial start of the unit must be carried out by trained personnel from an Authorized Johnson Controls Service Center (see Section 6: Commis-sioning).

• Only genuine YORK approved spare parts, oils, coolants, and refrigerants must be used.

• All the scheduled maintenance operations detailed in this manual must be performed at the specified times by suitably trained and qualified personnel (see SECTION 10 – MAINTENANCE).

• Failure to satisfy any of these conditions will au-tomatically void the warranty (see Warranty Poli-cy Form 50.05-NM2).

Safety and quality Standards for safety and quality YLUA units are designed and built within an ISO 9002 accredited design and manufacturing organization. The condensing units comply with the applicable sections of the following Standards and Codes:

• ANSI/ASHRAE Standard 15- Safety Code for Mechanical Refrigeration.

• ANSI/NFPA Standard 70- National Electrical Code (N.E.C.).

• ASME Boiler and Pressure Vessel Code- Section VIII Division 1.

• ASHRAE 90.1- Energy Efficiency compliance.

• ARI 370- Sound Rating of Large Outdoor Refrig-eration and Air Conditioning Equipment.

In addition, the condensing units conform to Under-writers Laboratories (U.L.) for construction of chillers and provide U.L./cU.L. Listing Label. Conforms to UL60335-2-40 requirements.

Responsibility for safety Every care has been taken in the design and manufac-ture of the unit to ensure compliance with the safety requirements listed above. However, the individual operating or working on any machinery is primarily responsible for:

• Personal safety, safety of other personnel, and the machinery.

• Correct use of the machinery in accordance with the procedures detailed in the manuals.

About this manual The following terms are used in this document to alert the reader to areas of potential hazard.

A WARNING is given in this document to identify a hazard, which could lead to personal injury. Usually an instruction will be given, together with a brief expla-nation and the possible result of ignoring the instruction.

A CAUTION identifies a hazard which could lead to damage to the machine, damage to other equipment and/or envi-ronmental pollution. Usually an instruc-tion will be given, together with a brief explanation and the possible result of ignoring the instruction.

A NOTE is used to highlight additional information, which may be helpful to you but where there are no special safety implications.

The contents of this manual include suggested best working practices and procedures. These are issued for guidance only, and they do not take precedence over the above stated individual responsibility and/or local safety regulations.

This manual and any other document supplied with the unit are the property of Johnson Controls which re-serves all rights. They may not be reproduced, in whole or in part, without prior written authorization from an authorized Johnson Controls representative.

JOHNSON CONTROLS 13

Section 1: General equipment information and safetyFORM 150.73-NM1

ISSUE DATE: 07/03/2024

Misuse of equipment Suitability for application The unit is intended for DX cooling applications and is not suitable for purposes other than those specified in these instructions. Any use of the equipment other than its intended use, or operation of the equipment contrary to the relevant procedures may result in injury to the operator, or damage to the equipment.

The unit must not be operated outside the design pa-rameters specified in this manual.

Structural support Structural support of the unit must be provided as in-dicated in these instructions. Failure to provide proper support may result in injury to the operator, or damage to the equipment and/or building.

Mechanical strength The unit is not designed to withstand loads or stresses from adjacent equipment, pipework or structures. Ad-ditional components must not be mounted on the unit.

Any such extraneous loads may cause structural failure and may result in injury to the operator, or damage to the equipment.

General access There are a number of areas and features, which may be a hazard and potentially cause injury when working on the unit unless suitable safety precautions are taken.

It is important to ensure that the chiller is installed in a secure area and access to the unit is restricted to suit-ably qualified persons who are familiar with the po-tential hazards and precautions necessary for safe op-eration and maintenance of equipment containing high temperatures, pressures and voltages. To further tighten security, ensure that the control panel is mechanically locked. Remove the keys to the control panel and store them in a secure location

Pressure systems The unit contains refrigerant vapor and liquid under pressure, release of which can be a danger and cause injury. The user should ensure that care is taken during installation, operation and maintenance to avoid dam-age to the pressure system. No attempt should be made to gain access to the component parts of the pressure system other than by suitably trained and qualified per-sonnel.

Electrical The unit must be grounded. No installation or main-tenance work should be attempted on the electrical equipment without first switching power OFF, isolat-ing and locking-off the power supply. Servicing and maintenance on live equipment must only be per-formed by suitably trained and qualified personnel. No attempt should be made to gain access to the control panel or electrical enclosures during normal operation of the unit.

Rotating parts Fan guards must be fitted at all times and not removed unless the power supply has been isolated. If ductwork is to be fitted, requiring the wire fan guards to be re-moved, alternative safety measures must be taken to protect against the risk of injury from rotating fans.

Sharp edges The fins on the air-cooled condenser coils have sharp metal edges. Take care when working in contact with the coils to avoid the risk of minor abrasions and lac-erations. The use of gloves is recommended.

Frame rails, brakes, and other components may also have sharp edges. Reasonable care should be taken when working in contact with any components to avoid risk of minor abrasions and lacerations.

Refrigerants and oils Refrigerants and oils used in the unit are generally non-toxic, non-flammable and non-corrosive, and pose no special safety hazards. Use of gloves and safety glasses is, however, recommended when working on the unit.

The build up of refrigerant vapor, from a leak for ex-ample, does pose a risk of asphyxiation in confined or enclosed spaces and attention should be given to good ventilation.

Refrigerants classified as A2L refrigerant must be han-dled in accordance with all governing regulations. Fail-ure to meet this requirement can result in damage to equipment, release of refrigerant into the environment, contamination of the operating space for the equip-ment, and pose a risk of personal injury or death. It is the responsibility of any service technician or operator to adhere to these requirements. For details, refer to ac-cess Chiller A2L Refrigerant Application Data, Form

160.00-AD10.

JOHNSON CONTROLS14

ISSUE DATE: 07/03/2024Section 1: General equipment information and safety

High temperature and pressure cleaning High temperature and pressure cleaning methods (e.g. steam cleaning) should not be used on any part of the pressure system as this may cause operation of the pressure relief device(s). Detergents and solvents, which may cause corrosion, should also be avoided.

Emergency shutdown In case of emergency, the control panel is fitted with a Unit Switch to stop the unit in an emergency. When op-erated, it removes the low voltage 120 VAC electrical supply from the inverter system, thus shutting down the unit.

MSDS information For Material Safety Data Sheets (MSDS) informa-tion, call (800) 451-8346 in the U.S. or by e-mail MSDS@3Ecompany.com. Provide the product name, manufacturer, part number, and the specific language required. For additional safety information, refer to https://my.jci.com/sites/BE/NASafety.

Safety labels

Black and red symbol on white background.

Refrigerant Safety Group: A2L.

White symbol on black background.

For safe operation, read the instructions first.

Black symbol on white background.

Warning: Read operating instructions.

Black symbol on white background.

Warning: Read technical manual.

White, Black and Safety Orange.

Warning label.

Refrigerant Safety Group

A2L

Refrigerant Safety Group

A2L

Black and red symbol on white background.

Refrigerant Safety Group: A2L.

nformation can be obtained by calling (800) 451-8346 in the U.S. or by e-mailing MSDS@3Ecompany.com. Provide the product name, manufacturer, part number, and the specific language required. For additional safety information, refer to https://my.jci.com/sites/BE/NASafety

JOHNSON CONTROLS 15

ISSUE DATE: 07/03/2024

Section 2: Product description

Introduction YORK Millennium® Air-Cooled Scroll Condensing Units can be used for all air conditioning applications using central station air handling or terminal units. They are completely self-contained and are designed for out-door (roof or ground level) installation. Each unit in-cludes hermetic scroll compressors, a liquid cooler, air cooled condenser, and a weather resistant microproces-sor control center, all mounted on a pressed steel base.

The 78 ton to 160 ton (273 kW to 560 kW) YLUA Con-densing Unit Models are shipped complete from the factory ready for field installation.

The unit is pressure-tested, evacuated and given a ni-trogen holding charge and includes an initial oil charge (R-410A or R-454B refrigerant supplied by others).

After assembly, a operational test is performed to en-sure that each control device operates correctly.

The unit structure is heavy-gauge, galvanized steel.

All exposed power wiring is routed through liquid-tight, non-metallic conduit.

General system description Compressors The condensing unit has suction-gas cooled, hermetic, scroll compressors. The YLUA compressors incor-porate a compliant scroll design in both the axial and radial direction. All rotating parts are statically and dynamically balanced. A large internal volume and oil reservoir provides greater liquid tolerance. Compres-sor crankcase heaters are also included for extra pro-tection against liquid migration.

Figure 1 - COMPRESSORS

Condenser Coils: Fin and tube condenser coils of seamless, in-ternally-enhanced, high-condensing-coefficient, corro-sion resistant copper tubes are arranged in staggered rows, mechanically expanded into aluminum fins. Inte-gral subcooling is included. The design working pres-sure of the coil is 650 psig (45 bar).

Fans: The condenser fans are composed of corrosion-resistant aluminum hub and glass-fiber-reinforced polypropylene composite blades molded into a low noise airfoil section. They are designed for maximum efficiency and are statically and dynamically balanced for vibration free operation. They are directly driven by independent motors, and positioned for vertical air dis-charge. The fan guards are constructed of heavy-gauge, rust-resistant, coated steel. All blades are statically and dynamically balanced for vibration-free operation.

Motors: The fan motors are Totally Enclosed Air-Over, squirrel-cage type, current protected. They feature ball bearings that are double-sealed and permanently lubri cated.

JOHNSON CONTROLS16

ISSUE DATE: 07/03/2024Section 2: Product description

All expansion valves, liquid line solenoid valves, filter driers, sight glasses, refrigerant, and refrigerant field piping are supplied and installed by others.

Microcomputer control center All controls are contained in a NEMA 3R/12 cabinet with hinged outer door and include:

Liquid Crystal Display with Light Emitting Diode backlighting for outdoor viewing:

• Two display lines

• Twenty characters per line

Color coded 12-button non-tactile keypad with sec-tions for:

Display/print of typical information:

• Suction temperatures (optional)

• Ambient temperature

• System pressures (each circuit)

• Operating hours and starts (each compressor)

• Print calls up to the liquid crystal display

• Operating data for the systems

• History of fault shutdown data for up to the last six fault shutdown conditions.

• An RS-232 port, in conjunction with this press-to-print button, is provided to permit the capability of hard copy print-outs via a separate printer (by others).

Entry section to:

Enter setpoints or modify system values SETPOINTS updating can be performed to:

• Suction pressure setting

• Suction pressure control zone

• Remote reset temperature range

• Set daily schedule/holiday for start/stop

• Manual override for servicing

• Low and high ambient cutouts

• Number of compressors

• Low suction pressure cutout

• High discharge pressure cutout

• Anti-recycle timer (compressor start cycle time)

• Anti-coincident timer (delay compressor starts)

Unit section to:

• Set clock

• Set options

• Set unit option

Set unit control for Discharge Air Temperature Control or for Suction Pressure Control (requires Suction Pres sure Transducers – standard).

Unit on/off switch

The microprocessor control center is capable of displaying the following:

• Suction temperatures (optional)

• Low ambient temperature cutout setting

• English or Metric data

• Suction pressure cutout setting

• Each system suction pressure

• System discharge pressure

• Discharge Air Temperature Reset via a YORK BAS DDC or Building Automation System (by others) via:

- �a pulse width modulated (PWM) input as stan-dard

- �a 4 mA to 20 mA or 0 VDC to 10 VDC input, or contact closure with the optional B.A.S. inter-face option

JOHNSON CONTROLS 17

Section 2: Product descriptionFORM 150.73-NM1

ISSUE DATE: 07/03/2024

• Anti-recycle timer status for each system

• Anti-coincident system start timer condition

• Compressor run status

• No cooling load condition

• Day, date and time

• Daily start/stop times

• Holiday status

• Automatic or manual system lead/lag control (Discharge Air Temperature control only)

• Automatic lead/lag of compressors within a sys-tem

• Compressor starts and operating hours (each com-pressor)

• Status of hot gas valves, and fan operation

• Run permissive status

• Number of compressors running

• Liquid solenoid valve status

• Load and unload timer status

Provisions are included for: pumpdown at shutdown;

optional remote discharge air temperature reset and two steps of demand load limiting from an external building automation system. Unit alarm contacts are standard.

The operating program is stored in non-volatile mem-ory (EPROM) to eliminate condensing unit failure due to AC powered failure/battery discharge. Programmed setpoints are retained in lithium battery-backed RTC memory for 5 years minimum.

High ambient kit Required if units are to operate when the ambient tem-perature is above 115°F (46°C). Includes sun shield panels and discharge pressure transducers. (This option includes the Discharge Pressure Transducer /Readout Capability option). (Field mounted).

Communications

• Native communication capability for BACnet®

(MS/TP) and Modbus®.

• Optional communication available for N2 and LON via eLink option.

* Intensity of Protection European Standard ** International Electrotechnical Commission

Power panel Each panel contains:

• Compressor power terminals

• Compressor motor starting contactors per l.E.C.*

• Control power terminals to accept incoming for 115-1-60 control power

• Fan contactors and overload current protection

The power wiring is routed through liquid-tight con-duit to the compressors and fans.

Accessories and options Power options Compressor power connections: Single-point termi-nal block connection(s) are provided as standard. The following power connections are available as options.

(See electrical data for specific voltage and options availability.) (Factory mounted).

Single point non-fused disconnect switch: Unit-mounted disconnect switch(s) with external, lockable handle (in compliance with Article 440-14 of N.E.C.), can be supplied to isolate the unit power voltage for servicing. Separate external fusing must be supplied, by others in the power wiring, which must comply with the National Electrical Code and/or local codes.

Single point non-fused disconnect switch with in-dividual system breakers: Includes unit-mounted disconnect switch with external, lockable handles (in compliance with Article 440-14 of N.E.C.) to isolate unit power voltage for servicing. Factory interconnect-ing wiring is provided from the disconnect switch to factory supplied system circuit breakers.

Single point circuit breaker: A unit mounted circuit breaker with external, lockable handle, in compliance with N.E.C. Article 440-14, can be supplied to isolate the power voltage for servicing. This option includes the single-point power connection.

Control transformer: Converts unit power voltage to 115-1-60 (0.5 kVA or 1.0 kVA capacity). Factory mounting includes primary- and secondary-wiring be-tween the transformer and the control panel. (Factory mounted).

Power factor correction capacitors: Corrects the unit compressor power factors to a 0.90-0.95. (Factory mounted).

JOHNSON CONTROLS18

ISSUE DATE: 07/03/2024Section 2: Product description

Control options Ambient kit (low): Units will operate to (standard) 32°F (-4°C). This accessory includes all necessary components to permit condensing unit operation to 0°F (-18°C). (This option includes the Discharge Pressure Transducer / Readout Capability option.) For prop-er head pressure control in applications below 25°F (-4°C) where wind gusts may exceed 5 mph (8 km/h), it is recommended that Optional Condenser Louvered Enclosure Panels also be included. (Factory mount-ed).

Building automation system interface: The factory addition of a Printed Circuit Board to accept a 4 mA to 20 mA, 0 VDC to 10 VDC, or contact closure input to reset the discharge air temperature from a Building Au-tomation System. (Factory Mounted). (The standard control panel can be directly connected to a YORK Building Automated System via the standard on board RS485 communication port.)

Language LCD and keypad display: Spanish, French, German, and Italian unit LCD controls and keypad display available. Standard language is Eng-lish.

Discharge pressure transducers and readout ca-pability: The addition of pressure transducers allows models to sense and display discharge pressure. (This option as included with either the low or high ambient kits). (Factory mounted).

Suction pressure transducers and readout capabil-ity: The addition of suction transducers allows mod-els to sense and display suction pressure. (Factory mounted).

Suction temperature readout: The addition of tem perature sensors allow models to sense and display suction temperature. (Factory mounted).

Compressor and piping options Chicago code relief valves: Unit will be provided with relief valves to meet Chicago code requirements. (Fac-tory mounted).

Hot gas by-pass: Permits continuous, stable operation at capacities below the minimum step of compressor unloading to as low as 5% capacity (depending on both the unit and operating conditions) by introducing an artificial load. Hot gas by-pass is available installed on refrigerant system 1 or on both systems of two circuit-ed units. (Factory mounted).

Service isolation valve: Service suction and discharge (ball type) isolation valves are added to unit per sys-tem. This option also includes a system high pressure relief valve in compliance with ASHRAE 15. (Factory mounted).

Condenser and cabinet options Condenser coil protection against corrosive environ-ments is available by choosing any of the following options. For additional application recommendations, refer to Form 150.12-ES1. (Factory mounted).

Pre-coated fin condenser coils: The air-cooled con-denser coils are constructed of black epoxy-coated aluminum fins. This can provide corrosion resistance comparable to copper-fin coils in typical seashore loca tions. Either these or the post-coated coils (below), are recommended for units being installed at the seashore or where salt spray may hit the unit.

Post-coated dipped condenser coils: The unit is built with dipped and cured condenser coils. This is another choice for seashore and other corrosive applications (with the exception of strong alkalis, oxidizers and wet bromine, chlorine and fluorine in concentrations greater than 100 ppm).

Copper-fin condenser coils: The unit constructed with condenser coils which have copper fins. (This is not recommended for units in areas where they may be exposed to acid rain).

Enclosure panels for unit: Tamperproof Enclosure Panels prevent unauthorized access to units. Enclosure Panels can provide an aesthetically pleasing alterna-tive to expensive fencing. Additionally, for proper head pressure control, YORK recommends the use of Con-denser Louvered Panels for winter applications where wind gusts may exceed 5 mph (8 km/h).

JOHNSON CONTROLS 19

ISSUE DATE: 07/03/2024

The following types of enclosure panels are available:

Wire panels, full unit: Consists of welded-wiremesh guards mounted on the exterior of the unit. Prevents unauthorized access, yet provides free air flow. (Fac-tory mounted).

Wire and louvered panels: Consists of welded-wire-mesh panels on the bottom part of unit and louvered panels on the condenser section of the unit. (Factory mounted).

Louvered panels, ondenser coil only: Louvered…

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