YORK YK Centrifugal Chiller - Form 160.75-EG1 915 - Engineering Guide

Oct 23, 2026

Engineering guide for YORK YK centrifugal liquid chillers (250–3000 tons / 879–10,500 kW) using HFC-134a, issued as FORM 160.75-EG1 (915). It describes matched components to maximize efficiency, emphasizes real-world energy performance under off-design conditions, and outlines continuous operation advantages tied to ECWT and condenser water flow. Additional sections cover open-drive design with air-cooled motors, high-efficiency heat exchangers, single-stage compressor reliability, and AHRI certification context, along with guide navigation, specifications, dimensions, and conversions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages118

Reading Time4 h 57 min

AccessFree to download

Introduction

Sustainability Focus

Equipment Overview

OPTIVIEW Control Center

Accessories and Modifications

Application Data

Dimensions

Weights

Guide Specifications

SI Metric Conversion

FORM 160.75-EG1 (915) MODEL YK CENTRIFUGAL LIQUID CHILLERS STYLE G 250 THROUGH 3000 TONS (879 through 10,500 kW) Utilizing HFC-134a FORM 160.75-EG1 (915) Nomenclature YK Q7 COMPRESSOR CODE - ES G MOTOR CODE DESIGN LEVEL POWER SUPPLY - for 60Hz CONDENSER 5 for 50Hz CODE S SPECIAL UNIT TYPE YORK YK Centrifugal Chiller Approvals See CODES AND STANDARDS on page 21 for Approvals. Dimensions in this guide are English (SI) 2 JOHNSON CONTROLS FORM 160.75-EG1 (915) Table Of Contents INTRODUCTION ...................................................................................................................................................... 5 SUSTAINABILITY FOCUS ...................................................................................................................................... 9 EQUIPMENT OVERVIEW ...................................................................................................................................... 13 OPTIVIEW CONTROL CENTER ........................................................................................................................... 24 ACCESSORIES AND MODIFICATIONS ............................................................................................................... 32 APPLICATION DATA ............................................................................................................................................. 44 DIMENSIONS......................................................................................................................................................... 76 WEIGHTS............................................................................................................................................................... 99 GUIDE SPECIFICATIONS ................................................................................................................................... 101 SI METRIC CONVERSION .................................................................................................................................. 114 JOHNSON CONTROLS 3 FORM 160.75-EG1 (915) THIS PAGE INTENTIONALLY LEFT BLANK. 4 JOHNSON CONTROLS FORM 160.75-EG1 (915) Introduction The YORK YK Chillers, manufactured by Johnson Controls, offer a complete combination of features for total owner satisfaction. MATCHED COMPONENTS MAXIMIZE EFFICIENCY Actual chiller efficiency cannot be determined by analyzing the theoretical efficiency of any one chiller component. It requires a specific combination of heat exchanger, compressor, and motor performance to achieve the lowest system kW/ton. YORK chiller technology matches chiller system components to provide maximum chiller efficiency under actual – not just theoretical – operating conditions. REAL-WORLD ENERGY PERFORMANCE Johnson Controls pioneered the concept of “Real-World Energy” to illustrate the energysaving potential of focusing on chiller performance during off-design conditions. Off-design is not only part load, but full load operation as well, with reduced entering condenser water temperatures (ECWTs) . This is where chillers operate 99% of the time, and where operating costs add up. The YORK YK chillers are the only chillers designed to operate on a continuous basis with cold ECWT and full condenser flow at all load points, taking full advantage of RealWorld conditions. This type of operation benefits the cooling tower as well by reducing the cycling of the fan motor and ensuring good coverage of the cooling fill. YORK YK chillers offer the most efficient Real-World operation of any chiller, meaning lower operating costs and an excellent return on your chiller investment. OPEN-DRIVE DESIGN Hermetic motor burnout can cause catastrophic damage to a chiller. The entire chiller must be cleaned, and the refrigerant replaced. YORK YK centrifugal chillers eliminate this risk by utilizing air-cool

FAQs

Why is YORK YK chiller efficiency described as dependent on matched components?

Actual efficiency depends on a specific combination of heat exchanger, compressor, and motor performance. The guide states that YORK technology matches system components to achieve maximum efficiency under real operating conditions rather than theoretical values.

What does “Real-World Energy” emphasize in this guide?

It focuses on chiller performance during off-design conditions, including both part load and full load operation. The guide highlights reduced entering condenser water temperatures (ECWTs) as a key area where chillers operate most of the time and where energy savings matter.

What reliability and contamination benefits are claimed for the open-drive design?

The guide explains that hermetic motor burnout can cause catastrophic damage, requiring extensive cleaning and refrigerant replacement. It claims YORK YK centrifugal chillers use air-cooled motors so refrigerant does not contact the motor, reducing contamination risk, and it notes insurance carriers often view air-cooled motors as an advantage.

Oct 23, 2026

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