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York YLAA User Manual

York YLAA
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JOHNSON CONTROLS
FORM 150.72-EG6 (516)
8
Equipment Overview
The 55 - 175 Ton (195 - 615 kW) YLAA models are shipped complete from the factory ready
for installa tion and use. The unit is pressure-tested, evacuated, and fully charged with a
zero Ozone Depletion Potential Refrigerant R-410A and includes an initial oil charge. After
assembly, a complete operational test is performed with water flowing through the evapo-
rator to as sure that the refrigeration circuit 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 test-
ing, 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 refrig-
eration, ASME and rated in accordance with AHRI Standard 550/590 and 551/591.
COMPRESSORS
The chiller has suction-gas cooled, hermetic scroll com pressors. The YLAA compressors in-
corporate a compli ant 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. Compressor-crankcase heaters are also included for extra protection against
liquid migration.
LD18425a
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York YLAA Specifications

General IconGeneral
ModelYLAA
CondenserAir-Cooled
EfficiencyHigh Efficiency
Sound Pressure LevelVaries by model (typically 70-85 dB)
DimensionsVaries by model
WeightVaries by model
CategoryAir-Cooled Scroll Chiller
Voltage208-575V, 3-phase, 50/60 Hz

Summary

Nomenclature

Introduction

Installation

Discusses factory assembly, single-point connection, and simple piping.

Reliability

Highlights proven scroll compressors and corrosion-resistant heat exchangers.

Efficiency

Covers high-efficiency and standard models, and IPLV performance.

Flexibility

Details options for glycol cooling, heat recovery, and pump configurations.

Sustainability

Focuses on R-410A refrigerant and reduced refrigerant charge for eco-friendliness.

Communications

Explains native BACnet, Modbus, N2 capabilities and optional LON.

Serviceability

Describes ease of maintenance, component accessibility, and cleaning.

AHRI CERTIFICATION PROGRAM

Details testing and third-party verification of chiller performance.

Equipment Overview

COMPRESSORS

Describes hermetic scroll compressors with compliant design and balanced rotating parts.

BRAZED PLATE EVAPORATOR

Details the compact, high-efficiency Brazed Plate Heat Exchanger construction.

CANADIAN REGISTRATION NUMBER (CRN) APPLICATION & PROOF OF CONFORMANCE

Lists Canadian Registration Numbers (CRN) for YLAA brazed plate evaporators.

CONDENSER

Describes condenser coils construction and fan details for performance.

UNIT CONTROL SYSTEM

Explains the intelligent control system for automatic operation and reliability.

DISPLAY/PRINT

Provides quick access to operating data and system information.

ENTRY

Allows entering setpoints or modifying system values and parameters.

COMMUNICATIONS

Lists standard BACnet, Modbus, N2 capabilities for building automation.

BUILDING AUTOMATION SYSTEM INTERFACE

Explains connection to Johnson Controls BAS via RS232 for system integration.

POWER PANEL

Describes the contents of the power panel, including contactors and protection.

Unit Components

Accessories and Options

POWER OPTIONS:

Details available options for unit power connections and disconnects.

CONTROL OPTIONS:

Lists options for ambient temperature control and language display.

COMPRESSOR, PIPING, EVAPORATOR OPTIONS:

Covers options for low-temp glycol, heat recovery, and hydro-kit configurations.

CONDENSER AND CABINET OPTIONS:

Describes options for condenser coil protection against corrosive environments.

SOUND ATTENUATION:

Details options for reducing operational noise for sensitive locations.

VIBRATION ISOLATION

Presents options for vibration isolation mounts for unit stability.

Design Parameters

Water Pressure Drop

Physical Data and Nominal Ratings

Part Load Ratings

Unit Dimensions

Isolator Locations

Isolator Details

Electrical Notes

Variable Speed Pump Electrical Data

Wiring Lugs

Electrical Data Without Pumps

Wiring Diagram

User Control Wiring

USER CONTROL WIRING INPUTS

Details wiring inputs for remote temperature reset, flow switch, and remote start/stop.

USER CONTROL WIRING OUTPUTS

Lists wiring outputs for evaporator heater, solenoid valves, and alarm contacts.

Application Data

UNIT LOCATION

Provides guidance on selecting a suitable outdoor installation site.

FOUNDATION

Specifies requirements for level and stable foundation for unit mounting.

VARIABLE PRIMARY FLOW

Advises on flow rate changes and system volume for VPF applications.

CHILLED LIQUID PIPING

Guides on proper layout and component selection for chilled liquid piping.

Guide Specifications

1.01 SCOPE

Outlines the general requirements and scope of the chiller system.

1.02 QUALITY ASSURANCE

Lists applicable standards and codes for product design and installation.

1.03 DELIVERY AND HANDLING

Covers requirements for unit delivery, shipment, storage, and handling.

2.01 CHILLER MATERIALS AND COMPONENTS

Specifies materials, construction, and basic components of the chiller.

2.02 COMPRESSORS

Details hermetic scroll compressor specifications and features.

2.03 REFRIGERANT CIRCUIT COMPONENTS

Lists essential components within each refrigerant circuit.

2.04 HEAT EXCHANGERS

Describes the brazed plate evaporator construction and features.

C. Microprocessor Control Center:

Details the microprocessor's functions, display, and keypad.

5. Programmable Setpoints

Lists configurable setpoints for language, temperature, and schedules.

6. Display Data

Describes the data points available on the unit display for monitoring.

7. System Safeties

Lists system safeties that cause automatic shutdown and require manual reset.

8. Unit Safeties

Details automatic safeties causing shutdown for ambient, temperature, and voltage issues.

10. BAS Communications

Specifies standard and optional communication protocols for BAS integration.

2.07 ACCESSORIES AND OPTIONS

Introduces available accessories and options that enhance functionality.

N. Sound Reduction

Covers factory-installed options for reducing operational noise levels.

O. Vibration Isolation

Lists field-installed options for vibration isolation mounts.

3.01 INSTALLATION

Details general requirements for rigging, installing, and leveling the chiller.

SI Metric Conversion

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