York YR User Manual

FORM 160.81-EG1 (502)

Model YR

Twin-Screw Compressor Liquid Chillers

Design Level A

Rated in Accordance

with the latest edition of ARI

ST ANDARD 550/590

200 through 430 tons (60 Hz)
700 through 1500 kW (50 Hz)
170 through 365 tons (50 Hz)
600 through 1280 kW (50 Hz)

Utilizing HFC-134a

00562VIP

ASHRAE

90.1

COMPLIANT

m

Metric Conversions

Table of Contents

PAGE

INTRODUCTION.......................................................... 3

FORM 160.81-EG1

LIST OF TABLES

RATINGS ..................................................................... 4

OPTIVIEW CONTROL CENTER ................................. 5

MECHANICAL SPECIFICATIONS............................... 13

ACCESSORIES & MODIFICATIONS .......................... 17

SI METRIC CONVERSION.......................................... 18

APPLICATION DATA.................................................... 19

DIMENSIONS – STD. .................................................. 26

Evaporator, Condenser & Water Boxes ................... 26

Evaporators, Compact Water Boxes (ft.-in.)............ 28

Evaporators, Compact Water Boxes (mm).............. 29

Condensers, Compact Water Boxes (ft.-in.) ............ 30

Condensers, Compact Water Boxes (mm) .............. 31

Floor Layout, Neoprene Isolators (In.) ..................... 32

Floor Layout, Neoprene Isolators (mm) ................... 33

Floor Layout, Spring Isolators (In. and mm) ............ 34

WEIGHTS – Std. and Metric........................................ 35

GUIDE SPECIFICATIONS ........................................... 36

TABLE

NO.

1 Water Flow Rate Limits................ 19

2 Motor Voltage Variations .............. 22

3 60 Hz Electrical Data.................... 23

4 Motor Starters............................... 24

5 50 Hz Electrical Data.................... 24

6 Available Compressor/Shell/

Motor Combinations ..................... 24

PAGE

Model

Evaporator Code

Condenser Code

The model number denotes the following characteristics of the unit:

Compressor Code

NOMENCLATURE

YR TD TD T0 – 46 A S

Special Features

Design Level

Motor Code

Power Supply:

– for 60 Hz
5 for 50 Hz

2

YORK INTERNATIONAL

Introduction

FORM 160.81-EG1

The YORK MAXE YR Chiller offers 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 IPL V/NPL V . YORK M

AXE chiller tech-

nology matches chiller system components to provide
maximum chiller efficiency under actual – not just theo­retical – operating conditions.

REAL-WORLD ENERGY PERFORMANCE

YORK pioneered the term “Real-World Energy” to il­lustrate the energy-saving 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
(ECWT s). This is where chillers operate 99% of the time,
and where operating costs add up.

The YR M

AXE 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 Real-World conditions. This type of operation benefits
the cooling tower as well; reducing cycling of the fan
motor and ensuring good coverage of the cooling fill.

YORK M

AXE chillers offer the most efficient Real-World

operation of any chiller, meaning lower operating costs
and an excellent return on your chiller investment.

HIGH-EFFICIENCY OIL SEPARATOR

HIGH-EFFICIENCY HEA T EXCHANGERS

M

AXE chiller heat exchangers offer the latest technology

in heat transfer surface design to give you maximum
efficiency and compact design. Waterside and
refrigerant-side design enhancements minimize both en­ergy consumption and tube fouling. The “skip-fin” design
at all intermediate tube supports provides maximum tube
wall thickness at the support area to extend tube life.

FACTORY PACKAGING
REDUCES FIELD LABOR COSTS

YORK M

AXE screw chillers are designed to keep instal-

lation costs low. Where installation access is not a
problem, the unit can be shipped completely packaged,
requiring minimal piping and wiring to complete the
installation.

For those units utilizing a factory installed Solid-State
Starter, the three power leads provide all power to the
chiller and its auxiliaries.

T AKE ADVANTAGE OF COLDER COOLING TOWER
WATER TEMPERATURES

YORK M

AXE screw chillers are designed to take full ad-

vantage of colder cooling tower water temperatures,
which are naturally available during most operating
hours. Considerable energy savings are available by
letting tower water temperature drop, rather than artifi­cially holding it above 75°F (23.9°C), especially at low
load, as some chillers require.

U.L. ACCEPTANCE – YOUR ASSURANCE
OF RELIABILITY

M

AXE YR Screw Chillers utilize high-efficiency oil sepa-

ration, limiting oil carry-over to less than 500 ppm. Oil
is vital in screw compressors for lubrication, rotor seal­ing and cooling. However, oil in the evaporator can lead
to reduced heat transfer and reduced system perfor­mance. The high-efficiency oil separator keeps the oil
in the lube circuit and maximizes heat transfer efficiency .

YORK INTERNATIONAL

YORK M

AXE screw chillers are approved for listing by

Underwriter’s Laboratories for the United States and
Canada. Recognition of safety and reliability is your as­surance of trouble-free performance in day-to-day build­ing operation.

3

Ratings

FORM 160.81-EG1

Rated in accordance with the latest
issue of ARI Standard 550/590.

ARI CERTIFICATION PROGRAM

The performance of YORK M
to the Air Conditioning and Refrigeration Institute (ARI)
complying with the certification sections of the latest
issue of ARI Standard 550/590. Under this Certification
Program, chillers are regularly tested in strict compli­ance with this Standard. This provides an independent,
third-party verification of chiller performance.

YORK YR screw chillers are designed to comply with
ASHRAE Standard 90.1-1999 and 90.1-2001. The su­perior part-load performance of the YORK YR chillers
far exceeds the IPLV/NPLV requirements of ASHRAE

90.1, providing superior Real World Energy savings
for efficiency conscious owners.

COMPUTERIZED PERFORMANCE RATINGS

Each chiller is custom-matched to meet the individual
building load and energy requirements. A large num­ber of standard heat exchangers and pass arrange­ments are available to provide the best possible match.

It is not practical to provide tabulated performance for
each combination, as the energy requirements at both

AXE chillers is certified

full- and part-load vary significantly with each heat ex­changer and pass arrangement. Computerized ratings
are available through each YORK sales office. These
ratings can be tailored to specific job requirements,
and are part of the ARI Certification Program.

OFF-DESIGN PERFORMANCE

Since the vast majority of its operating hours are spent
at off-design conditions, a chiller should be chosen not
only to meet the full-load design, but also for its ability
to perform efficiently at lower loads and lower tower
water temperatures. It is not uncommon for chillers with
the same full-load kW/TON to have an operating cost
difference of over 10% due to part-load operation.

Part-load information can be easily and accurately gen­erated by computer. And because it is so important to
an owner’s operating budget, this information is now
standard within the ARI Certification Program in the
form of an Integrated Part-Load V alue (IPL V), and Non­Standard Part-Load Value (NPLV).

The IPL V / NPLV formulas from ARI Standard 550/590
closely track chiller operations, and provide a more ac­curate indication of chiller performance than the previ­ous IPL V / APLV formula. A more detailed analysis must
take into account actual building load profiles, and lo­cal weather data. Part-load performance data should
be obtained for each job using its own design criteria.

4

YORK INTERNATIONAL

OptiView Control Center

FORM 160.81-EG1

OPTIVIEW CONTROL CENTER

The YORK OptiView Control Center , furnished as stan­dard on each chiller, provides the ultimate in ef ficiency,
monitoring, data recording, chiller protection and oper­ating ease. The control center is a factory-mounted,
wired and tested state-of-the-art microprocessor based
control system for R-134a screw chillers. The panel is
configured with a 10.4 inch diagonal color Liquid Crys­tal Display (LCD) surrounded by “soft” keys, which are
redefined with one keystroke based on the screen dis­play at that time. This revolutionary development makes
chiller operation quicker and easier than ever before.
Instead of requiring keystroke after keystroke to hunt
for information on a small monochrome LCD screen, a
single button reveals a wide array of information on a
large, full-color illustration of the appropriate compo­nent, which makes information easier to interpret. This
is all mounted in the middle of a keypad interface and
installed in a locked enclosure.

The LCD display allows graphic animated display of
the chiller, chiller sub-systems and system parameters;
this allows the presentation of several operating param­eters at once. In addition, the operator may view a
graphical representation of the historical operation of
the chiller as well as the present operation. A Status
Bar is displayed at all times on all screens. It contains
the System - Status Line and Details Line, the Control
Source, Access Level, Date and Time.

00550VIP

During the Start Sequence and System Lockout Delay ,
the system status will include a countdown timer indi­cating the time remaining. The control panel is com­patible with the YORK Solid State Starter (optional),
Electro-mechanical (E-M) starter, or any customer sup­plied E-M starter that complies with the YORK R-1131
standard. The locations of various chiller parameters
are clearly marked and instructions for specific opera­tions are provided. The panel verbiage is available in
other languages as an option, with English always avail­able. Data can be displayed in either English or Metric
units, plus keypad entry setpoints of 0.1 increments.

Security access is provided to prevent unauthorized
change of setpoints. This is accomplished with three dif­ferent levels of access and passwords for each level.
There are screens, displayed values, programmable
setpoints and manual controls only available with ser­vice level access to the chiller. They are only displayed
when logged in at the service access level. The Advanced
Diagnostics and troubleshooting information for the chiller
and the panel is also included at this access level.

The panel is fused through a 1-1/2 KVA transformer in
the compressor motor starter to provide individual over­current protected power for all controls. Numbered ter­minal strips for wiring such as Remote Start/Stop, Flow
Switch, Chilled Water Pump and Local or Remote Cy­cling Device are provided. The Panel also provides field
interlocks that indicate the chiller status. These con-

YORK INTERNATIONAL

5

OptiView Control Center (continued)

FORM 160.81-EG1

tacts include a Remote Mode Ready To Start, a Cy­cling Shutdown, a Safety Shutdown and a chiller Run
Contact. Pressure transducers sense system pressures
and thermistors sense system temperatures. The out­put of each transducer is a DC voltage that is analo­gous to the pressure input. The output of each ther­mistor is a DC voltage that is analogous to the tem­perature it is sensing.

Setpoints can be changed from a remote location via
0-10VDC, 4-20mA, contact closures or through serial
communications. The adjustable remote reset range [up
to 20°F (11.1°C)] provides flexible, efficient use of re­mote signal depending on reset needs. Serial data inter­face to the YORK ISN Building Automation System (BAS)
is through the General Protocol Interface Card (GPIC),
which can be mounted inside the Control Center.

This printed circuit board requests the required data from
the Micro Board and makes it available for the YORK
ISN network. This optional board is available through
the YORK BAS group. The operating program is stored
in non-volatile memory (EPROM) to eliminate chiller
failure due to AC power failure/battery discharge. Pro­grammed setpoints are retained in lithium battery­backed RTC memory for 11 years minimum.

Smart Freeze Point Protection can operate the chiller
as low as 36°F (2.22°C) leaving chilled water tempera­ture, without nuisance trips on Low Water Temperature.
The sophisticated program and sensor monitors the
chiller water temperature to prevent freeze-up. Each
programmable point has a pop-up screen with the al­lowable ranges, so the chiller cannot be programmed
to operate outside of its design limits.

Thermal ice storage systems are based on the concept
of using off-peak, lower cost electricity to build ice for
handling the cooling load during peak hours. The most
efficient way to build ice is to maximize chiller load and
minimize run time. Standard chiller control systems are
not designed for this operating mode. In a typical appli­cation, chillers will load and unload to maintain a leaving
chilled liquid setpoint. When the YORK YR chiller oper­ates in the thermal storage control mode, the unit will
remain at 100% load until the setpoint shutdown tem­perature is reached. To add greater operating flexibility
and eliminate unnecessary chiller cycling, two different
Low Water (Liquid) T emperature Restart Thresholds can
be programmed, one for the ice mode and one for the
standard cooling mode. This control enhancement is stan­dard on all YR chillers. The chiller can also be left in the
standard control mode for temperatures ranging between
20 and 70°F (-6.7 and 21.1°C), for applications involving
a process or comfort cooling duty that requires leaving
chilled liquid temperature setpoint control.

When power is applied to the chiller, the HOME screen is
displayed. This screen displays a visual representation of
the chiller and a collection of data detailing important op­erations and parameters. When the chiller is running, the
flow of chilled liquid is animated by the alternating shades
of color moving in and out of the pipe nozzles. The pri­mary values that need to be monitored and controlled are
shown on this screen. They are as follows:

Display Only:

• Chilled Liquid Temperature – Leaving

• Chilled Liquid Temperature – Return

• Condenser Liquid Temperature – Return

• Condenser Liquid Temperature – Leaving

• Motor Run (LED)

• % Full-load Amps

• Operating Hours

With the “soft” keys the operator is only one touch away
from the 8 main screens that allow access to the major
information and components of the chiller. The 8 screens
are the SYSTEM, EV APORAT OR, CONDENSER, COM-

PRESSOR, OIL SUMP, MOTOR, SETPOINTS, and the
HISTORY. Also on the Home Screen is the ability to Log
IN, Log OUT and Print. Log In and Log Out is the means

by which different security levels are accessed.
The SYSTEM screen gives a general overview of com-

mon chiller parameters for both shells. This is an end
view of the chiller with a 3-D cutaway of both the shells.
The following can be viewed from this screen:

Display Only:

• Discharge Temperature

• Chilled Liquid Temperature – Leaving

• Chilled Liquid Temperature – Return

• Chilled Liquid Temperature – Setpoint

• Evaporator Pressure

• Evaporator Saturation Temperature

• Condenser Liquid Temperature – Leaving

• Condenser Liquid Temperature – Return

• Condenser Pressure

• Condenser Saturation Temperature

• Oil Temperature

• Differential Oil Pressure

• % Full-load Amps

• Current Limit

• Slide Valve Position

6

YORK INTERNATIONAL

FORM 160.81-EG1

The EVAPORATOR screen displays a cutaway view of
the chiller evaporator. All setpoints relating to the evapo­rator side of the chiller are maintained on this screen.
Animation of the evaporation process indicates whether
the chiller is presently in RUN condition (bubbling) and
liquid flow in the pipes is indicated by alternating shades
of color moving in and out of the pipes. Adjustable lim­its on the low water temperature setpoints allow the
chiller to cycle on and off for greater efficiency and less
chiller cycling. The chiller cycles off when the leaving
chilled water temperature is below setpoint and is ad­justable from 1°F (0.55°C) below to a minimum of 36°F
(2.22°C). Restart is adjustable from setpoint up to a
max. of 80°F (26.6°C). The Panel will check for flow to
avoid freeze-up of the tubes. If flow is interrupted, shut­down will occur after a minimum of two seconds. The
following can also be performed through this screen:

Display Only:

• Chilled Liquid Flow Switch (Open/Closed)

• Chilled Liquid Pump (Run/Stop)

• Evaporator Pressure

• Evaporator Saturation Temperature

• Return Chilled Liquid Temperature

• Leaving Chilled Liquid Temperature

• Evaporator Refrigerant Temperature

• Small Temperature Difference

• Leaving Chilled Liquid Temperature Setpoints –
Setpoint

• Leaving Chilled Liquid Temperature Setpoints –
Remote Range

• Leaving Chilled Liquid Temperature Setpoints –
Shutdown

• Leaving Chilled Liquid Temperature Setpoints –
Shutdown Offset

• Leaving Chilled Liquid Temperature Setpoints –
Restart

• Leaving Chilled Liquid Temperature Setpoints –
Restart Offset

• Ice Storage Active (LED)

Programmable:

• Local Leaving Chilled Liquid Temperature – Range

• Local Leaving Chilled Liquid T emperature – Setpoint

• Leaving Chilled Liquid Temperature Cycling Offset –
Shutdown

• Leaving Chilled Liquid Temperature Cycling Offset –
Restart

The CONDENSER screen displays a cutaway view of
the chiller condenser. The liquid flow is animated to in­dicate flow through the condenser. All setpoints relat­ing to the condenser side of the chiller are maintained
on this screen. With the proper access level this screen
also serves as a gateway to controlling the Refrigerant
Level. The following can also be viewed through this
screen:

Display Only:

• Leaving Condenser Liquid Temperature

• Return Condenser Liquid Temperature

• Condenser Pressure

• Condenser Saturation Temperature

• Small Temperature Difference

• High Pressure Switch (Open/Closed)

• Condenser Liquid Flow Switch

• Condenser Liquid Pump (Run/Stop)

Programmable:

• High Pressure Warning Threshold

• Freeze Warning (Enabled/Disabled)

• Freeze Time

The COMPRESSOR screen displays a cutaway view
of the chiller compressor, revealing the rotary screw,
and shows all conditions associated with the compres­sor. The slide valve positioning is animated and with
the proper Access level, it can be manually controlled.
Animation of the compressor rotors indicates whether
the chiller is presently in a RUN condition. This screen
also serves as a gateway to sub-screens for calibrating
the slide valve or configuring the optional Hot Gas By­pass. From this screen you can view the following:

Display Only:

• Differential Oil Pressure

• Oil Temperature

• Discharge Temperature

• Discharge Superheat

• Slide Valve Position

• Oil Return Solenoid (LED)

• Full-load Amps (E.M. Starter Only)

• Phase A, B, C Current (SSS Only)

Programmable:

• Slide Valve Load (Manual)

• Slide Valve Hold (Manual)

YORK INTERNATIONAL

7

OptiView Control Center (continued)

FORM 160.81-EG1

• Slide Valve Unload (Manual)

• Slide Valve Auto

• Max. Load Temperature

• Minimum Load FLA

• Minimum Load Control Source

The HOT GAS BYPASS screen, accessed from the
COMPRESSOR screen, displays a pictorial of the by­pass line and solenoid valve location on the chiller. The
Hot Gas ON and OFF Setpoints are programmed on
this screen and system parameters pertinent to Hot Gas
Bypass operation are displayed. An LED illuminates
when the Hot Gas solenoid is ON. If the chiller is
equipped with the Hot Gas Bypass option, operation
must be enabled on the OPERATIONS screen. From
this screen you can perform the following:

Display Only:

• Slide Valve Position

• Return Chilled Liquid Temperature

• Leaving Chilled Liquid Temperature

• Hot Gas Solenoid (LED)

Programmable:

• On Setpoint

• Off Setpoint

The SLIDE VALVE CALIBRATION screen displays a
cutaway view of the chiller compressor, revealing the
rotary screw and slide valve and provides the capabil­ity of calibrating the slide valve. From this screen, you
can perform the following:

Display Only:

• Slide Valve Loading (LED)

• Slide Valve Unloading (LED)

• Calibration Message

Programmable:

• Start Calibration

• Cancel Calibration

The OIL SEPARATOR screen displays a close-up view
of the chiller oil separator/sump.

Display Only:

• Discharge Temperature

• Discharge Superheat

• Oil Pressure

• Discharge Pressure

8

• Differential Oil Pressure

• Differential Filter Pressure

• Oil Return Solenoid (LED)

• Evaporator Pressure

• Condenser Pressure

• Condenser Saturation

1. The MOTOR “soft” key on the HOME screen, when
pressed, shows a picture of either a YORK Electro­Mechanical Starter or a Solid State Starter, depend­ing on chiller configuration. The Programmable
pulldown demand to automatically limit motor load­ing can be used to minimize building demand
charges. Pulldown time period control over four
hours, and verification of time remaining in pulldown
cycle from display readout. Separate digital setpoint
for current limiting between 30 and 100%.

The ELECTRO-MECHANICAL STARTER (E–M)
screen displays a picture of the starter and the follow­ing values. The ones below are common among both
offerings and the values will be displayed on both types
of starter screens. From this screen you can perform
the following:

Display Only:

• Motor Run (LED)

• Motor Current % Full-load Amps

• Current Limit Setpoints

• Pulldown Demand Time Left

Programmable:

• Local Motor Current Limit

• Pulldown Demand Limit

• Pulldown Demand Time

The SOLID STATE STARTER (SSS) screen displays a
picture of the starter and the following values, which are
displayed in addition to the common ones listed above.
From this screen, you can perform the following:

Display Only:

• Input Power kW

• kW Hours

• Starter Model

• Voltage – Phase A, B, C

• Current – Phase A, B, C

• Temperature – Phase A, B, C

YORK INTERNATIONAL

FORM 160.81-EG1

Programmable:

• Full-load Amps

• Voltage Range

• Starting Current

• Open SCR

• Shorted SCR

• kWH Reset

The SETPOINTS screen provides a convenient loca­tion for programming the most common setpoints in­volved in the chiller control. The Setpoints are shown
on other individual screens, but to cut down on need­less searching, they can all be found on this screen.
This screen also serves as a gateway to a sub-screen
for defining the setup of general system parameters.
From this screen you can perform the following:

Display Only:

• Leaving Chilled Liquid Temperature – Setpoint

• Leaving Chilled Liquid Temperature Cycling –
Shutdown

• Leaving Chilled Liquid Temperature Cycling –
Restart

• Current Limit Setpoint

Programmable:

• Local Leaving Chilled Liquid Temperature – Range

• Local Leaving Chilled Liquid T emperature – Setpoint

• Leaving Chilled Liquid Temperature Cycling Offset –
Shutdown

• Leaving Chilled Liquid Temperature Cycling Offset –
Restart

• Remote Analog Input Range

• Local Motor Current Limit

• Pulldown Demand Limit

• Pulldown Demand Time

• Print

The SETUP is the top level of the general configura­tion parameters. It allows programming of the time and
date, along with specifications as to how the time will
be displayed. In addition, the chiller configuration as
determined by the Micro Board program jumpers and
program switches is displayed. From this screen you
can perform the following:

Display Only:

• Chilled Liquid Pump Operation (Displays Standard
or Enhanced)

• Anti-Recycle (Displays Disabled or Enabled)

• Power Failure Restart (Displays Manual or Automatic)

• Liquid Type (Displays Water or Brine)

Programmable:

• Set Date

• Set Time

• Clock (Enabled/Disabled)

• 12/24 Hour

The following six subscreens can be accessed from
the SETUP screen:

The SCHEDULE screen contains more programmable
values than a normal display screen. Each program­mable value is not linked to a specific button; instead,
the select key is used to enable the cursor arrows and
check key to program the Start/Stop times for any day
of the week up to 6 weeks in advance. The user has
the ability to define a standard set of Start/Stop times
that are utilized every week or specify exceptions to
create a special week.

Programmable:

• Exception Start/Stop Times

• Schedule (Enable/Disable)

• Repeat Sunday Schedule

• Standard Week Start/Stop Times

• Reset All Exception Days

• Select

• Print

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9

OptiView Control Center (continued)

FORM 160.81-EG1

The USER screen allows definition of the language for
the chiller to display and defines the unit of measure.

Programmable:

• System Language

• English/Metric Units

The COMMS screen allows the user to define commu­nications parameters.

Programmable:

• Chiller ID

• COM 2 Baud Rate

• COM 2 Data Bit(s)

• COM 2 Parity Bit(s)

• COM 2 Stop Bit(s)

• Printer Baud Rate

• Printer Data Bit(s)

• Printer Parity Bit(s)

• Printer Stop Bit(s)

The PRINTER screen permits the user to define com­munications Parameters for the Printer.

Display Only

• Time Remaining Until Next Print

Programmable

• Log Start Time

• Output Interval

• Automatic Printer Logging (Enabled/Disabled)

• Print Type

• Print Report

• Print All Histories

The SALES ORDER screen allows definition of the or­der parameters. Note: This information is loaded at the

factory or by the installation service technician.

The OPERATIONS screen permits definition of param-
eters pertaining to operation of the chiller. What is de­fined is whether the control of the chiller will be Local,
Digital Remote, Analog Remote, Modem Remote or ISN
Remote.

Programmable

• Control Source

The HISTORY screen allows the user to browse through
the last ten faults; either safety or cycling shutdowns
with the conditions, while the chiller is running or
stopped. The faults are color coded for ease in deter­mining the severity at a glance, recording the date, time
and description. (See Display Messages for Color Code
meanings.)

Display Only

• Last Normal Shutdown

• Last Fault While Running

• Last Ten Faults

Programmable:

• Print History

• Print All Histories

By pressing the VIEW DETAILS key you will move to
the HISTORY DETAILS screen. From these screens
you are able to see an on-screen printout of all the sys­tem parameters at the time of the selected shutdown.

Display Only:

• History Printout

Programmable:

• Page Up

• Page Down

• Print History

Display Only

• Model Number

• Panel Serial Number

• Chiller Serial Number

• YORK Order Number

• System Information

• Condenser and Evaporator Design Load Information

• Nameplate Information

10

Also under the HISTORY screen is the TRENDING
screen, accessible by the key marked the same. On
this screen, up to six operator-selected parameters, se­lected from a list of over 140, can be plotted in an X/Y
graph format. The graph can be customized to record
points once every second up to once every hour. There
are two types of charts that can be created: single
screen, or continuous screen. The single screen col­lects data for one screen width (450 data points across
the X-axis), then stops. The continuous screen keeps

YORK INTERNATIONAL

FORM 160.81-EG1

collecting the data, but the oldest data drops off the
graph from left to right at the next data collection inter­val. For ease of identification, each plotted parameter,
title and associated Y-axis labeling is color coordinated.

Display Only:

• This screen allows the user to view the graphical
trending of the selected parameters and is a gate­way to the graph setup screens.

Programmable:

• Start

• Stop

• y-axis

• x-axis

The TREND SETUP screen is used to configure the
trending screen. The parameters to be trended are se­lected from the Trend Common Slots screen, accessed
from the Slot Numbers button or the Master Slot Num­bers List found in the Operating Manual. The interval at
which all the parameters are sampled is selected under
the Collection Interval button. The data point minimum
and maximum values may be adjusted closer to in­crease viewing resolution.

DISPLAY MESSAGES

The Control Center continuously monitors the operat­ing system, displaying and recording the cause of any
shutdowns (Safety, Cycling or Normal). The condition
of the chiller is displayed at the System Status line that
contains a message describing the operating state of
the chiller; whether it is stopped, running, starting or
shutting down. A System Details Line displays Warn­ing, Cycling, Safety, Start Inhibit and other messages
that provide further details of the Status Bar messages.
Messages are color-coded: Green – Normal Operations;
Yellow – Warnings; Orange – Cycling Shutdowns; and
Red – Safety Shutdowns to aid in identifying problems
quickly.

Status messages include:

• System Ready To Start

• Cycling Shutdown – Auto Restart

• Safety Shutdown – Manual Restart

• Start Sequence Initiated

• System Run (with countdown timers)

• Start Inhibit

• Slide Valve Closing Before Shutdown

• System Lockout Delay

Programmable:

• Chart Type (select continuous or one screen)

• Collection Interval

• Select

• Data Point Slot Number (1 - 6)

• Data Point Min. (1 - 6)

• Data Point Max (1 - 6)

The TREND COMMON SLOTS screen displays the
Master Slot Numbers List of the monitored parameters.

Display Only:

• Slot Numbers

Programmable:

• Page Up

• Page Down

• Print

Run Messages include:

• Leaving Chilled Liquid Control

• Motor Pulldown Limit

• Motor – High Current Limit

Start Inhibit Messages include:

• Anti-Recycle XX min/sec.

• Slide Valve – Position >30%

• Motor Current >15% FLA

• LCSSS – High-Temperature Phase X - Stopped

Warning Messages include:

• Real Time Clock Failure

• Setpoint Override

• Condenser – High Pressure Limit

• Evaporator – Low Pressure Limit

• Freeze Threat From Operating Chiller

• Freeze Threat, Condenser Flow Switch Open

• Low Discharge Superheat Limit

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11

OptiView Control Center (continued)

FORM 160.81-EG1

• Low Discharge Superheat Detected

• Maximum Load – Load Limit

• Minimum Load – Load Limit

• Oil – Dirty Filter

• Oil – High Temperature

• Slide Valve Uncalibrated

Routine Shutdown Messages Include:

• Remote Stop

• Local Stop

• Place Compressor Switch In Run Position

Cycling Shutdown Messages Include:

• Multiunit Cycling – Contacts Open

• System Cycling – Contacts Open

• Control Panel – Power Failure

• Leaving Chilled Liquid – Low Temperature

• Leaving Chilled Liquid – Flow Switch Open

• Condenser – Flow Switch Open

• Motor Controller – Contacts Open

• Motor Controller – Loss of Current

• Power Fault

• Control Panel – Schedule

Solid State Starter Only (LCSSS)

• Initialization Failed

• Serial Communications

• Requesting Fault Data

• Stop Contacts Open

• Power Fault

• Low Phase (X) Temperature Sensor

• Run Signal

• Invalid Current Scale Selection

• Phase Locked Loop

• Low Supply Line Voltage

• High Supply Line Voltage

• Logic Board Processor

• Logic Board Power Supply

• Phase Loss

Safety Shutdown Messages include:

• Evaporator – Low Pressure

• Evaporator – Low Pressure – Smart Freeze

• Evaporator – Transducer or Leaving Liquid Probe

• Evaporator – Transducer or Temperature Sensor

• Condenser – High Pressure Contacts Open

• Condenser – High Pressure

• Condenser – Pressure Transducer Out of Range

• Auxiliary Safety – Contacts Closed

• Discharge – High Temperature

• Discharge – Low Temperature

• Oil – Low Differential Pressure

• Oil or Condenser Transducer Error

• Oil – Clogged Filter

• Oil – High Pressure

• Control Panel – Power Failure

• Watchdog – Software Reboot

Solid State Starter Only (LCSSS)

• Shutdown – Requesting Fault Data . . .

• High Instantaneous Current

• High Phase (X) Heatsink Temperature – Running

• 105% Motor Current Overload

• Motor or Starter – Current Imbalance

• Open SCR

• Phase Rotation

12

YORK INTERNATIONAL

Mechanical Specifications

FORM 160.81-EG1

GENERAL

Each YORK M
factory-packaged including evaporator, condenser , com­pressor, motor, OptiView control center and all inter­connecting unit piping and wiring. The chiller will be
painted prior to shipment and will be packaged to pro­tect the unit during shipment.

Performance will be certified in accordance with ARI
Standard 550/590.

The initial charge of refrigerant and oil will be supplied
for each unit.

DRIVELINE

The compressor will be twin-screw, rotary-screw type.
The compressor housing will be of cast iron, precision
machined to provide minimal clearance for the rotors.
The rotors will be manufactured from forged steel and
use asymmetric profiles operating at a maximum speed
of 3570 RPM (60 Hz) or 2975 RPM (50 Hz). The com­pressor will incorporate a complete anti-friction bearing
design to reduce power and increase reliability; cylin­drical roller bearings to handle radial loads; and 4 point
angular contact ball bearings to handle axial loads. The
compressor will have an internal oil reservoir to assure
a constant supply of oil to the bearings at all times. A
check valve will be incorporated in the compressor hous­ing to prevent rotor backspin during shutdown.

Capacity control will be achieved by use of a slide valve
to provide fully modulating control from 100% to 20%
of full-load. The slide valve will be actuated by system
differential pressure, controlled by external solenoid
valves through the OptiView control center. The unit
will be capable of operating with off-design cooling tower
water during part-load operation in accordance with ARI
Standard 550/590.

The motor will be 2-pole, continuous-duty, cage-induc­tion type, and will utilize suction gas cooling (semi-her­metic design). Motor full-load amperes at design condi­tions will not exceed chiller nameplate (FLA). Motor will
be designed for use with the type starter specified.

LUBRICATION SYSTEM

An adequate supply of oil will be available to the com­pressor at all times. During operation, oil will be deliv­ered by positive system pressure differential.

An immersion oil heater will be provided, (temperature
actuated), to effectively remove refrigerant from the oil
during the chiller off-cycle. An external, replaceable car­tridge, oil filter will be provided, along with manual isola-

AXE YR Screw Chiller will be completely

tion stop valves for ease of servicing. An oil eductor will
be provided to automatically remove oil which may have
migrated to the evaporator, and return it to the compres­sor. The oil separator will be of a vertical design with no
moving parts, and will provide high-efficiency oil separa­tion before the refrigerant enters the heat exchangers.
The oil separator will be designed, tested, and stamped
in accordance with the ASME Boiler and Pressure Ves­sel Code, Section VIII Division 1. Liquid refrigerant in­jection will be provided to maintain satisfactory oil tem­peratures and allow operation of the chiller over the full
range of conditions.

EVAPORATOR

Evaporator will be of the shell-and-tube, flooded type
designed for 235 PSIG (1620 kPa) working pressure on
the refrigerant side, and will be tested in accordance with
ASME code. The shell will be fabricated from rolled car­bon steel plate with fusion welded seams or carbon steel
pipe; have carbon steel tube sheets, drilled and reamed
to accommodate the tubes; and intermediate tube sup­ports spaced no more than four feet apart. The refriger­ant side will be designed, tested and stamped in accor­dance with the ASME Boiler and Pressure Vessel Code,
Section VIII Division 1. Tubes shall be high-efficiency,
internally and externally enhanced type having plain cop­per lands at all intermediate tube supports to provide
maximum tube wall thickness at the support area. Each
tube will be roller expanded into the tube sheets provid­ing a leak-proof seal, and be individually replaceable.
Water velocity through the tubes will not exceed 12 fps.
A liquid level sight glass will be located on the side of the
shell to aid in determining proper refrigerant charge. The
evaporator will have a refrigerant relief device to meet
the requirements of the ASHRAE 15 Safety Code for
Mechanical Refrigeration.

Water boxes will be removable to permit tube cleaning
and replacement. Stubout water connections having
victaulic grooves will be provided. Vent and drain con­nections with plugs will be provided on each water box.

CONDENSER

Condenser will be of the shell-and-tube type, designed
for 235 psig (1620 kPa) working pressure on the refrig­erant side, and be tested in accordance with ASME code.
The shell will be fabricated from rolled carbon steel plate
with fusion welded seams or carbon steel pipe; have
carbon steel tube sheets, drilled and reamed to accom­modate the tubes; and intermediate tube supports
spaced no more than four feet apart. A refrigerant
subcooler will be provided for improved cycle efficiency .
The refrigerant side will be designed, tested and
stamped in accordance with the ASME Boiler and Pres-

YORK INTERNATIONAL

13

Mechanical Specifications (continued)

FORM 160.81-EG1

sure Vessel Code, Section VIII, Division 1. Tubes shall
be high-efficiency, internally and externally enhanced
type having plain copper lands at all intermediate tube
supports to provide maximum tube wall thickness at
the support area. Each tube will be roller expanded into
the tube sheets providing a leak proof seal, and be indi­vidually replaceable. Water velocity through the tubes
will not exceed 12 fps. The condenser will have refrig­erant relief devices to meet the requirements of the
ASHRAE 15 Safety Code for Mechanical Refrigeration.

Water boxes will be removable to permit tube cleaning
and replacement. Stubout water connections having
victaulic grooves will be provided. Vent and drain con­nections with plugs will be provided on each water box.

REFRIGERANT SYSTEM

A modulating variable orifice controlled by the OptiV iew
Control Center to accommodate varying head condi­tions will meter refrigerant flow to the evaporator.

The condenser shell will be capable of storing the en­tire system refrigerant charge during servicing. Service
valves will be provided to facilitate removal of refriger­ant charge from the system.

The unit will be equipped with a suction strainer to pre­vent any foreign debris introduced to the system during
maintenance or service to be allowed into the motor
housing. Motors cooled by refrigerant must be protected
by means of filter or strainer to protect the motor and
prolong motor life.

OPTIVIEW CONTROL CENTER

General

The chiller will be controlled by a stand-alone micro­processor based control center. The chiller control panel
will provide control of chiller operation and monitoring
of chiller sensors, actuators, relays and switches.

Control Panel

The control panel will include a 10.4 inch diagonal color
liquid crystal display (LCD) surrounded by “soft “ keys
which are redefined based on the screen displayed at
that time. It will be mounted in the middle of a keypad
interface and installed in a locked enclosure. The screen
will detail all operations and parameters, using a graphi­cal representation of the chiller and its major compo­nents. Panel verbiage is available in other languages
as an option with English always available. Data can be
displayed in either English or Metric units. Smart Freeze
Point Protection will run the chiller at 36 °F (2.2°C) leav-

ing chilled water temperature, and not have nuisance
trips on low water temperature. The sophisticated pro­gram and sensor will monitor the chiller water tempera­ture to prevent freeze up. When needed, Hot Gas By­pass is available as an option. The panel displays count­down timer messages so the operator knows when func­tions are starting and stopping. Every programmable
point will have a pop-up screen with the allowable
ranges, so that the chiller can not be programmed to
operate outside of its design limits.

The control panel is provided with a thermal ice stor­age control mode to enhance system performance dur­ing ice building operation. In the thermal storage con­trol mode, the chiller will stay at 100% load until the
setpoint shutdown temperature is reached. To add
greater operating flexibility and eliminate unnecessary
chiller cycling, two different Low Water (Liquid) Tem­perature Restart Thresholds are programmable, one for
the ice mode and one for the standard cooling mode.
The chiller has the capability to remain in the standard
control mode for temperatures between 20 to 70°F (-

6.6 to 21.1°C) for applications involving a process or
comfort cooling duty that requires leaving chilled liquid
temperature setpoint control.

The chiller control panel also provides:

1. System operating information including:
a. return and leaving chilled liquid temperature
b. return and leaving condenser liquid

temperature

c. evaporator and condenser saturation

temperature

d. oil pressure at compressor and oil filter

differential
e. percent motor current
f. evaporator and condenser saturation

temperature
g. compressor discharge temperature
h. oil temperature
i. percent slide valve position
j. operating hours
k. number of unit starts

2. Digital programming of setpoints through the uni­versal keypad including:

a. leaving chilled liquid temperature
b. percent current limit
c. pull-down demand limiting
d. six-week schedule for starting and stopping the

chiller, pumps and tower

e. remote reset temperature range

14

YORK INTERNATIONAL

FORM 160.81-EG1

3. Status messages indicating:
a. system ready to start
b. system running
c. system coastdown
d. system safety shutdown-manual restart
e. system cycling shutdown-auto restart
f. start sequence initiated
g. start inhibit

4. The text displayed within the system status and
system details field will be displayed as a color
coded message to indicate severity: red for safety
fault, orange for cycling faults, yellow for warnings,
and green for normal messages.

5. Safety shutdowns enunciated through the display
and the status bar, and consist of system status,
system details, day, time, cause of shutdown, and
type of restart required. Safety shutdowns with a
fixed speed drive will include:

a. evaporator – low pressure
b. evaporator – low pressure – smart freeze
c. evaporator – transducer or leaving liquid probe
d. evaporator – transducer or temperature sensor
e. condenser – high pressure contacts open
f. condenser – high pressure
g. condenser – pressure transducer out of range
h. auxiliary safety – contacts closed
i. discharge – high temperature
j. discharge – low temperature
k. oil – low differential pressure
l. oil or condenser transducer error
m. oil – clogged filter
n. oil – high pressure
o. control panel – power failure
p. watchdog – software reboot

5.1. Safety shutdowns with a Solid State Starter
(LCSSS) will include:

a. shutdown – requesting fault data…
b. high instantaneous current
c. high phase (X) heatsink temperature - running
d. 105% motor current overload
e. motor or starter – current imbalance
f. phase (X) shorted SCR
g. open SCR
h. phase rotation

6. Cycling shutdowns enunciated through the display
and the status bar, and consists of system status,
system details, day , time, cause of shutdown, and

type of restart required. Cycling shutdowns with a
fixed speed drive will include:

a. multiunit cycling – contacts open
b. system cycling - contacts open
c. control panel - power failure
d. leaving chilled liquid - low temperature
e. leaving chilled liquid - flow switch open
f. condenser – flow switch open
g. motor controller – contacts open
h. motor controller – loss of current
i. power fault
j. control panel - schedule

6.1. Cycling shutdowns with a Solid State Starter
(LCSSS) will include:

a. initialization failed
b. serial communications
c. requesting fault data
d. stop contacts open
e. power fault
f. low phase (X) temperature sensor
g. run signal
h. invalid current scale selection
i. phase locked loop
j. low supply line voltage
k. high supply line voltage
l. logic board processor
m. logic board power supply
n. phase loss

7. Security access to prevent unauthorized change
of setpoints, to allow local or remote control of the
chiller, and to allow manual operation of the slide
valve. Access is through ID and password recog­nition, which is defined by three different levels of
user competence: view, operator, and service.

8. Trending data with the ability to customize points
of once every second to once every hour. The panel
shall trend up to 6 different parameters from a list
of over 140, without the need of an external moni­toring system.

9. The operating program stored in non-volatile
memory (EPROM) to eliminate reprogramming the
chiller due to AC power failure or battery discharge.
Programmed setpoints will be retained in lithium
battery-backed RTC memory for a minimum of 11
years with power removed from the system.

10. A fused connection through a transformer in the
compressor motor starter to provide individual
over-current protected power for all controls.

YORK INTERNATIONAL

15

Mechanical Specifications (continued)

FORM 160.81-EG1

11. A numbered terminal strip for all required field in­terlock wiring.

12. An RS-232 port to output all system operating data,
shutdown / cycling message, and a record of the
last 10 cycling or safety shutdowns to a field-sup­plied printer. Data logs to a printer at a set pro­grammable interval. This data can be
preprogrammed to print from 1 minute to 1 day.

13. The capability to interface with a building automa­tion system to provide:

a. remote chiller start and stop
b. remote leaving chiller liquid temperature adjust
c. remote current limit setpoint adjust
d. remote ready to start contacts
e. safety shutdown contacts
f. cycling shutdown contacts
g. run contacts

STARTUP AND OPERATOR TRAINING

The services of a factory-trained, field service repre­sentative will be provided to supervise the initial startup
and conduct concurrent operator instruction.

CODES AND STANDARDS

• ASME Boiler and Pressure Vessel Code – Section
Vlll Division 1.

• ARI Standard 550/590

• c/U.L. – Underwriters Laboratory

• ASHRAE 15 – Safety Code for Mechanical Refrig­eration

• ASHRAE Guideline 3 – Reducing Emission of Ha­logenated Refrigerants in Refrigeration and Air-Con­ditioning Equipment and Systems

• NEC – National Electrical Code

• OSHA – Occupational Safety and Health Act

ISOLATION MOUNTING

The unit is provided with four vibration isolation mounts
consisting of 1" (25.4 mm) thick neoprene isolation pads
for field mounting under the steel mounting pads lo­cated on the tube sheets.

REFRIGERANT CONTAINMENT

The standard unit has been designed as a complete
and compact factory packaged chiller. As such, it has
minimum joints from which refrigerant can leak. The
entire assembly has been thoroughly leak tested at
the factory prior to shipment. The YORK chiller in­cludes service valves conveniently located to facili­tate transfer of refrigerant to a remote refrigerant stor­age/recycling system. Optional condenser isolation
valves permit storage of the charge in the condenser.

PAINT

Exterior surfaces are protected with one coat of Carib­bean blue, durable alkyd-modified, vinyl enamel, ma­chinery paint.

SHIPMENT

The unit shall be completely assembled, with all main,
auxiliary, and control piping installed, controls wired,
leak tests completed, functional run tests completed,
and refrigerant charge in place. The oil charge, relief
device and other miscellaneous materials shall be
packed separately.

Protective covering is furnished on the Control Center
and unit-mounted controls. The entire unit is then shrink­wrapped with high-quality reinforced plastic to provide
maximum protection during transit. Water nozzles are
capped with fitted plastic enclosures.

16

YORK INTERNATIONAL

Accessories and Modifications

FORM 160.81-EG1

SOLID STATE STARTER

The Solid State Starter is a reduced voltage starter that
controls and maintains a constant current flow to the
motor during startup. It is compact and mounted on the
chiller at the motor terminals. Power and control wiring
is factory supplied. Available for 200-600 volts, the
starter enclosure is NEMA-1 with a hinged access door
with lock and key. Electrical lugs for incoming power
wiring are provided.

Standard features include: digital readout at the OptiV­iew Control Center of the following:

Display Only:

• 3-phase voltage A, B, C

• 3-phase current A, B, C

• Input power (kW)

• kW Hours

• Starter Model

• Motor Run (LED)

• Motor Current % Full-load Amps

• Current Limit Setpoints

• Pulldown Demand Time Left

Programmable:

• Local Motor Current Limit

• Pulldown Demand Limit

• Pulldown Demand Time

FACTORY INSULATION OF EVAPORATOR

Factory-applied thermal insulation of the flexible, closed­cell plastic type, 3/4" (19mm) thick is attached with va­por-proof cement to the evaporator shell, flow cham­ber, evaporator tube sheets, suction connection, and
(as necessary) to the auxiliary tubing. Not included is
the insulation of water boxes and nozzles. This insula­tion will normally prevent condensation in environments
with relative humidities up to 75% and dry bulb tem­peratures ranging from 50° to 90°F (10° to 32°C). 1-1/
2" (38mm) thick insulation is also available for relative
humidities up to 90% and dry bulb temperatures rang­ing from 50° to 90°F (10° to 32°C).

WATER FLANGES

Four 150 Ib. ANSI raised-face flanges, for condenser
and evaporator water connections, are factory welded
to water nozzles. Companion flanges, bolts, nuts and
gaskets are not included.

SPRING ISOLATION MOUNTING

Spring Isolation mounting is available instead of stan­dard isolation mounting pads when desired. Four level­adjusting/spring-type vibration isolator assemblies with
non-skid pads are provided with mounting brackets for
field installation. Isolators are designed for one-inch
(25.4 mm) deflection.

Other features include: low line voltage; 115-volt con­trol transformer; three-leg sensing overloads; phase ro­tation and single-phase failure protection; high tempera­ture safety protection; motor current imbalance and
undervoltage safeties; open and close SCR protection;
momentary power interruption protection. The LCSSS
is cooled by a closed-loop, fresh water circuit consist­ing of a water-to-water heat exchanger and 1/25 HP
circulating pump. All interconnecting water piping is
factory installed and rated for 150 PSIG working pres­sure. Optional unit-mounted circuit breaker includes
ground fault protection and provides 65,000 amp short­circuit withstand rating in accordance with UL Standard

508. A non-fused disconnect switch is also available.
Both options are padlockable.

BAS REMOTE CONTROL

A communication interface permitting complete ex­change of chiller data with any BAS system is available
with optional ISN translator. ISN translator also allows
BAS system to issue commands to the chiller to control
its operation. ISN translators come in two models, con­trolling up to four chillers and eight chillers respectively .

WATER FLOW SWITCHES

Paddle-type, vapor-proof water flow switches suitable
for 150 psig (1034 kPa) DWP for chilled and condenser
water circuits. Switch for 115V-1-50/60 Hz service. A
chilled water flow switch is required. Condenser water
flow switch is optional.

SEQUENCE CONTROL KIT

For two, three or four units with chilled water circuits
connected in series or parallel, the kit consists of return
water thermostat, lead-lag selector switch for sequence
starting, and time delay relay , with NEMA-1 enclosures,
designed for 115V-1-50/60 Hz.

STARTER – FIELD INSTALLED

A field installed, electro-mechanical compressor motor
starter is available, selected for proper size and type
for job requirements and in accordance with YORK En­gineering Standard R-1131 for Starters.

YORK INTERNATIONAL

17

FORM 160.81-EG1

Accessories and Modifications (continued)

MARINE WATER BOXES

required to rig into tight spaces. This is particularly con­venient for existing buildings where equipment room

Marine water boxes allow service access for cleaning

access does not allow rigging a factory packaged chiller.
of the heat exchanger tubes without the need to break
the water piping. Bolted-on covers are arranged for con-

REFRIGERANT STORAGE/RECYCLING SYSTEM

venient access. Victaulic nozzle connections are stan­dard; flanges are optional. Marine water boxes are avail­able for condenser and/or evaporator.

A refrigerant storage/recycling system is a self-contained

package consisting of a refrigerant compressor with oil

separator, storage receiver , water-cooled condenser , fil-

KNOCK-DOWN SHIPMENT

ter drier and necessary valves and hoses to remove,

replace and distill refrigerant. All necessary controls and
The chiller can be shipped knocked-down into major
assemblies (evaporator, condenser, driveline, etc.) as

safety devices are a permanent part of the system. T ypi-

cally not required if unit isolation valves are provided.

SI Metric Conversion

The following factors can be used to convert from English to the most common Sl Metric values.

MEASUREMENT

MULTIPLY THIS

ENGLISH VALUE METRIC VALUE

BY

TO OBTAIN THIS

CAPACITY TONS REFRIGERANT EFFECT (ton) 3.516 KILOWATTS (kW)

POWER

FLOW RATE GALLONS / MINUTE (gpm) 0.0631 LITERS / SECOND (L/s)

LENGTH
WEIGHT POUNDS (lb) 0.4536 KILOGRAMS (kg)

VELOCITY FEET / SECOND (fps) 0.3048 METERS / SECOND (m/s)

PRESSURE DROP

Integrated Part Load Value (IPLV)

In the English I-P system, IPLV is calculated by the fol-

KILOWATTS (kW) NO CHANGE KILOWATTS (kW)

HORSEPOWER (hp) 0.7457 KILOWATTS (kW)

FEET (ft) 304.8 MILLIMETERS (mm)

INCHES (in) 25.4 MILLIMETERS (mm)

FEET OF WATER (ft) 2.989 KILOPASCALS (k Pa)

POUNDS / SQ. INCH (psi) 6.895 KILOPASCALS (k Pa)

In SI Metric, the formula is:

IPLV* = 0.01A + 0.42B + 0.45C + 0.12D

lowing formula. A full explanation is shown on page 4:

1

IPLV*=

Where: A = kW / ton at 100% Load @ 85°F ECFT

0.01
ABCD

B = kW / ton at 75% Load @ 75°F ECFT
C = kW / ton at 50% Load @ 65°F ECFT
D = kW / ton at 25% Load @ 65°F ECFT

0.42

+

0.45

+

0.12

+

Where: A = COP at 100% Load @ 29.4°C ECFT

B = COP at 75% Load @ 23.9°C ECFT
C = COP at 50% Load @ 18.3°C ECFT
D = COP at 25% Load @ 18.3°C ECFT

NOTE:

* The Non-Standard Part-Load V alue (NPL V) uses the IPL V formula

with the following exceptions: the ECFT for part-load points varies
linearly from the selected EFT to 65°F (18.3°C) from 100% to 50%
loads, and fixed at 65°F (18.3°C) for 50% to 0% loads.

18

YORK INTERNATIONAL

Application Data

FORM 160.81-EG1

The following is a user’s guide in the application and
installation of MAXE Chillers, and will ensure the reli­ability and trouble-free life for which this equipment was
designed. While this guide is directed towards normal,
water-chilling applications, the YORK sales represen­tatives can provide complete recommendations on other
types of applications.

Location

M

AXE Chillers are virtually vibration-free and generally

can be located at any level in a building where the con­struction will support the total system operating weight.

The unit site must be a floor, mounting pad or founda­tion which is level within 1/4" (6.4 mm) and capable of
supporting the operating weight of the chiller.

Sufficient clearance to permit normal service and main­tenance work should be provided all around and above
the unit. Additional space should be provided at one
end of the unit to permit cleaning of evaporator and
condenser tubes as required. A doorway or other prop­erly located opening may be used.

The chiller should be installed in an indoor location where
temperatures range from 40°F to 1 10°F (4.4°C to 43.3°C).

Water Circuits
Flow Rate – For normal water chilling duty, evaporator

flow rates are permitted at water velocity levels in the heat
exchangers tubes of between 3 ft./second and 12 ft./sec­ond (0.91 m/s and 3.66 m/s). Condenser flow rates are
permitted between 3.33 ft./sec. and 12 ft./sec. (1.01 m/s
and 3.66 m/s). V ariable flow applications are possible, and
initial chiller selections should be made accordingly to
permit proper range of flow while maintaining the mini-

mum velocity noted above. V ariable flow in the condenser
is not recommended, as it generally raises the energy con­sumption of the system by keeping the condenser pres­sure high in the chiller. Additionally, the rate of fouling in
the condenser will increase at lower water velocities asso­ciated with variable flow, raising system maintenance costs.
Cooling towers typically have narrow ranges of operation
with respect to flow rates, and will be more effective with
full design flow. Ref. Table 1 for flow limits.

Temperature Ranges – For normal water chilling duty,
leaving chilled water temperatures may be selected be­tween 38°F (3.3°C) [36°F (2.2°C) with Smart Freeze en­abled) and 70°F (21.1°C) for water temperature ranges
between 3°F and 30°F (1.7°C and 16.7°C).

Water Quality – The practical and economical application
of liquid chillers requires that the quality of the water supply
for the condenser and evaporator be analyzed by a water
treatment specialist. Water quality may affect the perfor­mance of any chiller through corrosion, deposition of heat­resistant scale, or sedimentation or organic growth. These
will degrade chiller performance and increase operating and
maintenance costs. Normally , performance may be main­tained by corrective water treatment and periodic cleaning
of tubes. If water conditions exist which cannot be corrected
by proper water treatment, it may be necessary to provide a
larger allowance for fouling, and/or to specify special mate­rials of construction.

General Piping – All chilled water and condenser water
piping should be designed and installed in accordance
with accepted piping practice. Chilled water and condenser
water pumps should be located to discharge through the
chiller to assure positive pressure and flow through the
unit. Piping should include offsets to provide flexibility and
should be arranged to prevent drainage of water from the

TABLE 1 – WATER FLOW RATE LIMITS – GPM (L/s)

SHELL

CODE

TB, VB

TC, VC

TD, VD

WB, XB

WC, XC

WD, XD

YORK INTERNATIONAL

PASS

1 3 83 (24.2) 1525 (96.2) 613 (38.7) 2204 (139.1)
2 1 92 (12.1) 762 (48.1) 307 (19.4) 1102 (69.5)
3 1 28 (8.1) 508 (32.1) 205 (12.9) 734 (46.3)
1 4 68 (29.5) 1866 (118.0) 683 (43.1) 2455 (154.9)
2 2 34 (14.8) 932 (58.8) 342 (21.6) 1227 (77.4)
3 1 57 (9.9) 621 (39.2) 228 (14.4) 818 (51.6)
1 5 70 (36.0) 2277 (143.7) 771 (48.7) 2774 (175.0)
2 2 86 (18.0) 1 1 3 8 (71.8) 386 (24.4) 1386 (87.5)
3 ––– ––– ––– ––– ––– ––– ––– –––
1 6 93 (43.7) 2771 (174.9) 866 (54.6) 3462 (218.5)
2 3 46 (21.8) 1385 (87.4) 433 (27.3) 1731 (109.2)
3 2 31 (14.6) 924 (58.3) 289 (18.2) 1154 (72.8)
1 8 22 (51.9) 3287 (207.4) 1082 (68.3) 4328 (273.1)
2 411 (25.9) 1644 (103.7) 541 (34.1) 2164 (136.5)
3 2 74 (17.3) 1096 (69.2) 361 (22.8) 1443 (91.1)
1 9 86 (62.2) 3945 (248.9) 1350 (85.2) 5400 (340.1)
2 4 93 (31.1) 1972 (124.4) 675 (42.6) 2700 (170.0)
3 ––– ––– ––– ––– ––– ––– ––– –––

MINIMUM

EVAPORATOR CONDENSER

MAXIMUM

MINIMUM

MAXIMUM

19

Application Data (continued)

FORM 160.81-EG1

evaporator and condenser when the pumps are shut off.
Piping should be adequately supported and braced inde­pendently of the chiller to avoid the imposition of strain on
chiller components. Hangers must allow for alignment of
the pipe. Isolators in the piping and in the hangers are
highly desirable in achieving sound and vibration control.

Convenience Considerations – T o facilitate the perfor­mance of routine maintenance work, some or all of the
following steps may be taken by the purchaser. Evapora­tor and condenser water boxes are equipped with plugged
vent and drain connections. If desired, vent and drain
valves may be installed with or without piping to an open
drain. Pressure gauges with stop cocks, and stop valves,
may be installed in the inlets and outlets of the condenser
and chilled water line as close as possible to the chiller.
An overhead monorail or beam may be used to facilitate
servicing.

Connections – The standard chiller is designed for 150
psig (1034 kPa) design working pressure in both the
chilled water and condenser water circuits. The con­nections (water nozzles) to these circuits are furnished
with grooves for Victaulic couplings. Piping should be
arranged for ease of disassembly at the unit for tube
cleaning. All water piping should be thoroughly cleaned
of all dirt and debris before final connections are made
to the chiller.

Chilled Water – A flow switch must be installed in the
chilled water line of every unit. The switch must be lo­cated in the horizontal piping close to the unit, where the
straight horizontal runs on each side of the flow switch
are at least five pipe diameters in length. The switch
must be electrically connected to the chilled water inter­lock position in the unit control center. A water strainer of
maximum 1/8" (3.2 mm) perforated holes must be field­installed in the chilled water inlet line as close as pos­sible to the chiller. If located close enough to the chiller,
the chilled water pump may be protected by the same
strainer. The flow switch and strainer assure chilled wa­ter flow during unit operation. The loss or severe reduc­tion of water flow could seriously impair the chiller per­formance or even result in tube freeze-up.

°F Min ECWT = LCHWT + 16 + [(% load/100) x

(10 - full-load condenser water ∆ T)]

°C Min ECWT = LCHWT + 8.9 + [(% load/100) x

(5.6 - full-load condenser water ∆ T)]

Where: ECWT = entering condenser water temperature

LCHWT = leaving chilled water temperature

MULTIPLE UNITS
Selection – Many applications require multiple units to

meet the total capacity requirements as well as to pro­vide flexibility and some degree of protection against
equipment shutdown. There are several common unit
arrangements for this type of application. The M
chiller has been designed to be readily adapted to the
requirements of these various arrangements.

Parallel Arrangement (Refer to Fig. 1) – Chillers may
be applied in multiples with chilled and condenser wa­ter circuits connected in parallel between the units. Fig.
1 represents a parallel arrangement with two chillers.
Parallel chiller arrangements may consist of equally or
unequally sized units. When multiple units are in op­eration, they will load and unload at equal percentages
of design full-load for the chiller.

Depending on the number of units and operating char­acteristics of the units, loading and unloading schemes
should be designed to optimize the overall efficiency of
the chiller plant. It is recommended to use an evaporator
bypass piping arrangement to bypass fluid around evapo­rator of any unit which has cycled off at reduced load
conditions. It is also recommended to alternate the chiller
cycling order to equalize chiller starts and run hours.

AXE

Condenser Water – The chiller is engineered for maxi­mum efficiency at both design and part-load operation
by taking advantage of the colder cooling tower water
temperatures which naturally occur during the winter
months. Appreciable power savings are realized from
these reduced heads.

The minimum entering condenser water temperature
for other full and part-load conditions is provided by the
following equation:

20

LD00507

FIG. 1 –

Series Arrangement (Refer to Fig. 2) – The chillers

may be applied in pairs with chilled water circuits con-

PARALLEL EVAPORATORS
PARALLEL CONDENSERS

YORK INTERNATIONAL

FORM 160.81-EG1

nected in series and condenser water circuits connected
in parallel. All of the chilled water flows through both cool­ers with each unit handling approximately one-half of the
total load. When the load decreases to a customer se­lected load value, one of the units will be shut down by a
sequence control. Since all water is flowing through the
operating unit, that unit will cool the water to the de­sired temperature.

LD00508

FIG. 2 – SERIES EVAPORATORS

P ARALLEL CONDENSERS

BRINE APPLICA TIONS

The YR Screw Chiller , utilizing the Frick Refrigeration com­pressor, is a good match for the high head requirements
of low temperature brine applications. This is particularly
true of thermal ice storage systems, typically requiring 22°F
(–5.6°C) to 24°F (–4.4°C) leaving brine temperatures. This
performance is enhanced with the standard thermal stor­age control mode described on page 6.

Particular attention must be paid to the application of
two or more chillers with evaporators in parallel or se­ries when the brine temperature is below 32°F (0°C).
The brine MUST NOT flow through the evaporator of
the idle chiller, because it can cause the condenser wa­ter to freeze. A bypass or other type of arrangement is
required that shuts off flow to the idle evaporator . When
units are applied in series with lead/lag capability, the
units should be identical.

REFRIGERANT RELIEF PIPING

Each chiller is equipped with pressure relief devices.
The purpose of the relief devices is to quickly relieve
excess pressure of the refrigerant charge to atmosphere,
as a safety precaution in the event of an emergency
such as a fire. They are set to relieve at an internal
pressure of 235 psig (1620 kPa) and are located on the
condenser, evaporator and oil separator; and are pro­vided in accordance with ASHRAE 15 Safety Code and
ASME or applicable pressure vessel code. Under these
circumstances the relief devices may be relief valves,

overflow valves or type tested Safety Pressure switches
or a combination of these devices.

Sized to the requirements of applicable codes, a vent
line must run from the relief device to the outside of the
building. This refrigerant relief piping must include a
cleanable, vertical-leg dirt trap to catch vent-stack con­densation. Vent piping must be arranged to avoid im­posing a strain on the relief connections and should
include one flexible connection.

SOUND AND VIBRATION CONSIDERATIONS

A M

AXE chiller is not a source of objectionable sound

and vibration in normal air conditioning applications. Neo­prene isolation mounts are furnished as standard with
each unit. Optional level-adjusting spring isolator assem­blies designed for 1" static deflection are available.

M

AXE chiller sound pressure level ratings will be fur-

nished upon request.
Control of sound and vibration transmission must be taken

into account in the equipment room construction as well
as in the selection and installation of the equipment.

THERMAL INSULATION

No appreciable operating economy can be achieved
by thermally insulating the chiller. However , the chiller’s
cold surfaces should be insulated with a vapor barrier
insulation sufficient to prevent condensation. A chiller
can be factory insulated with 3/4" (19mm) or 1-1/2"
(38mm) thick insulation, as an option. This insulation
will normally prevent condensation in environments
with dry bulb temperatures of 50°F to 90°F (10°C to
32°C) and relative humidities up to 75% [3/4" (19mm)
thickness] or 90% [1-1/2" (38mm) thickness]. The in­sulation is painted and the surface is flexible and rea­sonably resistant to wear. It is intended for a chiller
installed indoors and, therefore, no protective cover­ing of the insulation is usually required. If insulation is
applied to the water boxes at the job site, it must be
removable to permit access to the tubes for routine
maintenance.

VENTILATION

The ASHRAE Standard 15 Safety Code for Mechani­cal Refrigeration requires that all machinery rooms be
vented to the outdoors utilizing mechanical ventilation
by one or more power-driven fans. This standard, plus
National Fire Protection Association Standard 90A,
state, local and other related codes should be reviewed
for specific requirements.

YORK INTERNATIONAL

21

Application Data (continued)

FORM 160.81-EG1

In addition, the ASHRAE Standard 15 requires a refriger­ant vapor detector to be employed for all refrigerants. It is
to be located in area where refrigerant from a leak would
be likely to concentrate. An alarm is to be activated and
the mechanical ventilation started at a value no greater
than the TL V (Threshold Limit V alue) of the refrigerant.

ELECTRICAL CONSIDERATIONS
Motor Voltage – Low voltage motors (200 - 600 volts)

are furnished with six leads. Motor circuit conductor size
must be in accordance with the National Electrical Code
(NEC), or other applicable codes, for the motor full­load amperes (FLA). Flexible conduit should be used
for the last several feet to the chiller in order to provide
vibration isolation. Table 2 lists the allowable variation
in voltage supplied to the chiller motor. The unit name­plate is stamped with the specific motor voltage and fre­quency for the appropriate motor.

TABLE 2 – MOTOR VOLTAGE VARIATIONS

FREQ.

60 HZ

50 HZ

RA TED

VOLTAGE

200 200/208 180 220
230 220/240 208 254
380 380 342 415
460 440/460/480 414 508
575 575/600 520 635
380 380/400 342 423
415 415 374 440

NAMEPLATE

VOLTAGE

OPERATING VOL T AGE

MIN. MAX.

Starters – The chiller is available with a factory-mounted

and wired YORK Solid State Starter for 200 - 600 volt
applications. Other types of remote mounted starters
are available. These electro-mechanical starters must
be furnished in accordance with YORK Standard R-

1131. Specification. This will ensure that starter com­ponents, controls, circuits, and terminal markings will
be suitable for required overall system performance.

Controls – A 115 volt, single phase, 60 or 50 Hertz
(4.5 kV a) power supply must be furnished to the chiller
from a separate, fused disconnect or from a control
transformer included as an option with electro-mechani­cal starters. No field control wiring is required, when
the YORK SSS is supplied.

Copper Conductors – Only copper conductors should
be connected to compressor motors and starters. Alu-

minum conductors have proven to be unsatisfactory
when connected to copper lugs. Aluminum oxide and
the difference in thermal conductivity between copper
and aluminum cannot guarantee the required tight con­nection over a long period of time.

Power Factor Correction Capacitors – Capacitors can
be applied to a chiller for the purpose of power factor
correction. For remote-Mounted Electro-Mechanical
Starters, the capacitors should be located on the load
side of the starter. For YORK SSS, the capacitors must
be located on the line side of the starter. The capacitors
must be sized and installed to meet the National Elec­trical Code (NEC) and be verified by YORK.

Ampacity on Load Side of Starter – Electrical power
wire size to the chiller is based on the minimum unit
ampacity. For YORK SSS, this wiring is done at the
factory . For remote starters, the National Electrical Code
defines the calculation of ampacity , as summarized be­low. More specific information on actual amperage rat­ings will be supplied with the submittal drawings.

• Six-lead type of starting (Star-Delta)
Minimum circuit ampacity per conductor (1 of 6):

Ampacity = .721 x compressor motor amps.

• Three-lead type of starting
(Across-the-Line, Autotransformer and
Primary Reactor)

Minimum circuit ampacity per conductor (1 of 3):
Ampacity = 1.25 x compressor motor amps.

Ampacity on Line Side of Starter –

The only additional load on the circuit for the chiller
would be the control transformer, unless it is supplied
by a separate source.

Min. Circuit Ampacity =

125% of compr. + FLA of all other

motor amps loads on the circuit

Branch Circuit Overcurrent Protection – The branch
circuit overcurrent protection device(s) should be a time­delay type, with a minimum rating equal to the next stan­dard fuse/breaker rating above the calculated value. It is
calculated taking into account the compressor motor
amps and may also include control transformer. Refer
to submittal drawings for the specific calculations for each
application.

MOTOR ELECTRICAL DATA

The full-load amperes (FLA) listed in Tables 3 and 4
are maximum values and correspond to the maximum
motor kW listed. When the Input power (kW) is less
than maximum motor kW, the FLA should be reduced
using the following equation:

22

YORK INTERNATIONAL

FORM 160.81-EG1

FLA =

Motor kW

Max. Motor kW

x Max. Motor FLA

The locked rotor amperes (LRA) are read directly from
T ables 3 and 4 for specific Motor Code and voltage. This
is because the LRA is dependent only on motor size and

The benefit from the FLA correction is the possible use

voltage and is independent of input power (kW).

of smaller power wiring and/or starter size.

Inrush amperes (IRA) depend on LRA and the type of
starter applied. The inrush can be calculated using a
percentage of LRA shown in Table 5.

TABLE 3 – 60 HZ ELECTRICAL DATA

NAME­COMP. PLATE

T0/T1 380 438 1727 89.3 94.6 89.3 95.0 89.2 95.4 88.5 95.7 87.8 96.0 85.1 96.1 82.4 96.2 73.5 95.6 64.6 95.0 251.6

T2/T3 380 464 2130 90.3 94.8 90.1 95.2 89.9 95.5 89.1 95.8 88.2 96.0 85.6 96.0 82.9 96.0 73.8 95.3 64.7 94.6 275.9

AMP

(MAX)

VOLT.

FLA LR A PF EFF PF EFF PF EFF PF EFF P F EFF PF EFF P F EFF PF EFF PF EFF KW (hp)

200 850 3634 88.2 94.8 87.8 95.2 87.3 95.5 85.8 95.7 84.3 95.9 80.4 96.0 76.5 96.0 65.8 95.2 55.1 94.4
208 825 3779 86.6 95.0 85.6 95.3 84.6 95.5 82.6 95.7 80.5 95.9 75.5 95.8 70.5 95.7 59.0 94.8 47.4 93.8
230 725 2901 89.2 94.5 89.1 95.0 89.0 95.4 88.2 95.7 87.3 96.0 84.5 96.1 81.6 96.2 72.4 95.6 63.1 94.9
240 695 3027 88.2 94.9 87.7 95.2 87.2 95.5 85.8 95.8 84.3 96.0 80.4 96.0 76.5 96.0 65.8 95.2 55.0 94.4

440 370 1390 89.6 94.2 89.8 94.7 90.0 95.2 89.6 95.6 89.2 95.9 87.2 96.1 85.2 96.3 77.7 95.9 70.1 95.4 (321)
460 354 1453 89.2 94.6 89.1 95.0 88.9 95.4 88.1 95.7 87.3 96.0 84.5 96.1 81.6 96.2 72.4 95.6 63.1 94.9
480 339 1516 88.2 94.9 87.7 95.2 87.2 95.5 85.8 95.8 84.3 96.0 80.4 96.0 76.5 96.0 65.8 95.2 55.0 94.4
575 300 1162 89.2 94.6 89.1 95.0 88.9 95.4 88.1 95.7 87.3 96.0 84.4 96.1 81.5 96.2 72.3 95.6 93.1 95.0
600 288 1213 88.2 94.9 87.7 95.3 87.2 95.6 85.8 95.8 84.3 96.0 80.4 96.0 76.5 96.0 65.8 95.3 55.0 94.5
200 882 4048 90.4 94.8 90.2 95.2 90.0 95.5 89.2 95.8 88.3 96.0 85.6 96.0 82.9 96.0 73.8 95.3 64.7 94.6
208 860 4210 89.1 95.0 88.5 95.3 87.8 95.6 86.4 95.8 94.9 96.0 81.3 96.0 77.6 95.9 67.1 95.0 56.5 94.1
230 760 3520 90.5 94.7 90.4 95.1 90.2 95.4 89.5 95.7 88.7 95.9 86.2 96.0 83.7 96.0 75.0 95.4 66.3 94.7
240 737 3673 89.3 95.0 88.8 95.3 88.3 95.5 86.9 95.7 85.4 95.9 81.9 95.9 78.3 95.9 67.9 95.0 57.5 94.1

440 400 1603 91.0 94.4 91.2 94.9 91.4 95.3 91.1 95.6 90.8 95.9 89.3 96.1 87.7 96.2 80.9 95.7 74.0 95.1 (351)
460 383 1676 90.5 94.7 90.4 95.1 90.2 95.5 89.5 95.8 88.7 96.0 86.2 96.1 83.7 96.1 75.0 95.4 66.2 94.7
480 372 1749 89.3 95.0 88.8 95.3 88.2 95.6 86.8 95.8 85.4 96.0 81.8 96.0 78.2 95.9 67.9 95.0 57.5 94.1
575 305 1408 90.7 94.7 90.7 95.1 90.6 95.5 90.0 95.8 89.4 96.0 87.2 96.1 85.0 96.2 77.0 95.5 68.9 94.8
600 293 1469 89.9 95.0 89.5 95.3 89.1 95.6 88.0 95.8 86.9 96.0 83.8 96.0 80.7 96.0 71.0 95.2 61.2 94.4

100% 90% 80% 70% 60% 50% 40% 30% 20% MAX.

MOTOR DATA

NOTE: FLA = Full-load Amps; LRA = Locked Rotor Amps; PF = Power Factor; EFF = Motor Ef ficiency

100% Loading is Percentage of Maximum Motor Load; not of Specific Application

YORK INTERNATIONAL

23

TABLE 4 – 50 HZ ELECTRICAL DATA

FORM 160.81-EG1

NAME­COMP. PLATE

T0/T1 4 00 348 1488 88.2 94.1 87.7 94.6 87.2 95.0 85.9 95.3 84.5 95.6 80.4 95.7 76.3 95.7 65.6 94.9 54.9 94.1

T2/T3 400 371 1725 89.6 94.4 89.1 94.8 88.6 95.2 87.3 95.5 85.9 95.7 82.4 95.8 78.9 95.8 68.5 95.1 58.1 94.3

NOTE: FLA = Full-load Amps; LRA = Locked Rotor Amps; PF = Power Factor; EFF = Motor Efficiency

AMP

(MAX)

VOLT.

FLA LR A PF EFF PF EFF PF EFF PF EFF P F EFF PF EFF P F EFF PF EFF PF EFF KW (hp)

380 364 1414 89.3 93.7 89.2 94.3 89.1 94.8 88.4 95.2 87.7 95.6 84.9 95.8 82.1 95.9 73.3 95.3 64.5 94.7

415 333 1544 89.2 93.8 89.1 94.4 88.9 94.9 88.1 95.3 87.3 95.6 84.3 95.8 81.3 95.9 72.2 95.3 93.1 94.6
380 390 1639 90.4 94.0 90.3 94.5 90.1 94.9 89.4 95.3 88.6 95.6 86.2 95.8 83.7 96.0 75.2 95.4 66.6 94.8

415 354 1790 90.4 94.0 90.3 94.5 90.1 94.9 89.3 95.3 88.5 95.6 86.1 95.8 83.6 95.9 75.1 95.4 66.5 94.8

100% Loading is Percentage of Maximum Motor Load; not of Specific Application

100% 90% 80% 70% 60% 50% 40% 30% 20% MAX.

MOTOR DATA

TABLE 5 – MOTOR STARTERS

TYPE

STARTER

60HZ

50 HZ

TRANSITION

% TAP

INRUSH

AS A % OF LRA

SOLID
STATE

STARTER

200-600
380-415

NONE

—
45

ST AR DELTA AUTO TRANSFORMER

200-600
380-415

CLOSED

—

33

200-600
380-415

OPEN

—
33

200-600
380-415

CLOSED

57.7
33

200-600
380-415

CLOSED

65

42.3

200-600
380-415

CLOSED

80
64

ACROSS

THE LINE

200-600
380-415

—
—

100

210.2
(267)

231.9
(292)

TABLE 6 – AVAILABLE COMPRESSOR/SHELL COMBINATIONS

COMPRESSOR EVAPORATOR CONDENSER

CODE SHELL SHELL
T0, T1

T1 WB, WC, WD WB, WC, WD

T2/T3

TB, TC, TD TB, TC, TD
VB, VC, VD VB, VC, VD

WB, WC, WD WB, WC, WD

XB, XC, XD XB, XC, XD

24

YORK INTERNATIONAL

OPTIVIEW GRAPHIC
CONTROL CENTER

OPTIONAL
UNIT MOUNTED
SOLID
STA TE
STARTER

FORM 160.81-EG1

2-STAGE HIGH
EFFICIENCY
OIL SEP ARA TO R

MOTOR END

CONDENSER
SIGHT GLASS

LIQUID LINE
VARIABLE ORIFICE

COMPRESSOR
END

00562VIP

YORK INTERNATIONAL

25

Dimensions

FORM 160.81-EG1

MOTOR

END

8-1/2"

(216 mm)

MOTOR

END

RELIEF VALVES
(SEE TABLE)

L

2' - 3-1/2"
(698 mm)

M

OPTIVIEW

CONTROL PANEL

MOTOR

COMPRESSOR

TOP VIEW

SOLID STATE STARTER

(OPTIONAL)

COMPRESSOR

END

RELIEF VALVE
(SEE TABLE)

ISOLATION VALVE

NOTE: OPTIONAL

RELIEF VALVES*

LOCATION

WITH ISOLATION WITHOUT ISOLATION

VALVES VALVES

EVAPORATOR 1" SINGLE 1" DUAL
CONDENSER 1" DUAL 1" SINGLE
DISCHARGE
LINE

1-1/4" SINGLE NONE

*All are NPT female

OIL SEPARATOR

COMPRESSOR

END

ISOLATION VALVE

NOTE: OPTIONAL

RELIEF VALVE

NOTE: ONLY SUPPLIED
ON UNITS WITH
OPTIONAL ISOLATION
VALV ES

2' - 6-1/4"
(768 mm)

3'-8-3/4 "

(1136.7 mm)

K

U

B

C

A

H

FRONT OF UNIT

P

J

B

CONDENSER

F

D

EVAPORATOR

C

E

SECTION A - A

FIG . 3 – T0 & T3 COMPRESSORS – EV APORA T OR, CONDENSER AND W A TER BOXES DIMENSIONS

26

YORK INTERNATIONAL

G

LD07981

FORM 160.81-EG1

EVAPORATOR – CONDENSER SHELL CODES

DIM. T0 & T1 COMPRESSORS T1 COMPRESSORS T2 & T3 COMPRESSORS

T - T V - V T - T V - V W - W W - W W - W X - X W - W X - X

A 10'–0" 14'–0" 3048 mm 4267 mm 12'–0" 3657 mm 12'–0" 16'-0" 3658 mm 4877 mm
B 7'–5-1/8" 7'–5-1/8" 2264 mm 2264 mm 7'–9-3/4" 2381 mm 8'–10-7/8" 8'–10-7/8" 2715 mm 2715 mm
C 5'–1" 5'–1" 1550 mm 1550 mm 5'–6" 1676 mm 5'–6" 5'–6" 1676 mm 1676 mm
D 2'–6" 2'–6" 762 mm 762 mm 2'–7" 787 mm 2'–7" 2'–7" 787 mm 787 mm
E 2'–7" 2'–7" 787 mm 787 mm 2'–11" 889 mm 2'–11" 2'–11" 889 mm 889 mm
F 1'–3" 1'–3" 381 mm 381 mm 1'–3-1/2" 114 mm 1'–3-1/2" 1'–3-1/2" 394 mm 394 mm
G 1'–3-1/2" 1'–3-1/2" 394 mm 394 mm 1'–5-1/2" 165 mm 1'–5-1/2" 1'–5-1/2" 445 mm 445 mm
L 2-3/4" 2'– 2-3/4" 70 mm 679 mm 2-3/4" 70 mm 2-3/4" 2'–2-3/4" 70 mm 679 mm
M 1'–3" 3'–3" 381 mm 991 mm 1'–3" 381 mm 1'–3" 3'–3" 381 mm 991 mm

WATER BOX DIMENSIONS (FT. - IN)

DIM.

1 PASS 2 PASS 3 PASS 1 PASS 2 PASS 3 PASS

EVAPORATORS T & V CONDENSER T & V

H 1'–2-3/4" 1'–1-1/2" 1'–1-1/2" — — —
J — — — 1'–2-3/4" 1'–0-1/2" 1'–0-1/2"

DIM. REAR HEAD 2 PASS REAR HEAD 2 PASS

K 8-3/4" 7-5/8"

WATER BOX DIMENSIONS (mm)

DIM.

1 PASS 2 PASS 3 PASS 1 PASS 2 PASS 3 PASS

EVAPORATORS T & V CONDENSER T & V

H 375 343 343 — — —
J — — — 375 318 318

DIM. REAR HEAD 2 PASS REAR HEAD 2 PASS

K 222 194

WATER BOX DIMENSIONS (FT. - IN)

DIM.

1 PASS 2 PASS 3 PASS 1 PASS 2 PASS 3 PASS

EVAPORATORS W & X CONDENSER W & X

H 1'–2-1/4" 1'–2-1/4" 1'–2-1/4" — — —
J — — — 1'–2-1/4" 1'–2-1/4" 1'–2-1/4"

DIM. REAR HEAD 2 PASS REAR HEAD 2 PASS

K 5-5/8" 5-5/8"

WATER BOX DIMENSIONS (mm)

DIM.

1 PASS 2 PASS 3 PASS 1 PASS 2 PASS 3 PASS

EVAPORATORS W & X CONDENSER W & X

H 362 362 362 — — —
J — — — 362 362 362

DIM. REAR HEAD 2 PASS REAR HEAD 2 PASS

K 143 143

YORK INTERNATIONAL

27

FORM 160.81-EG1

Dimensions (Ft.-In.) – Nozzle Arrangements

EVAPORATORS – COMPACT W ATER BOXES

REAR

OF UNIT

AH

CC CC

REAR

OF UNIT

REAR

OF UNIT

EVAPORATOR

1" 1"

MOTOR END COMPRESSOR END

DD

BB

EVAPORATOR EVAPORATOR

1"

MOTOR END COMPRESSOR END

GG GG

FLOOR LINE

B

C

GG GG

FLOOR LINE

EVAPORATOR

REAR

OF UNIT

1-PASS

NOZZLE

ARRANGEMENTS

NO. OF EVAP.

PASSES IN OUT

1

REAR

OF UNIT

J

K

DD

BB

1"

REAR

OF UNIT

ARRANGEMENTS

NO. OF EVAP.

PASSES IN OUT

2

NOTE: Water must enter
through bottom connection to
achieve rated performance.

AH
HA

2-PASS

NOZZLE

CB
KJ

3-PASS

NOZZLE

ARRANGEMENTS

NO. OF EVAP.

PASSES IN OUT

3

GN

PF

DD

F

G

BB

EVAPORATOR EVAPORATOR

N

P

DD

BB

NOTE: Water must enter

1" 1"

MOTOR END COMPRESSOR END

GG GG

FLOOR LINE

EVAPORATOR NOZZLE PIPE SIZE

SHELL

CODE

NO. OF PASSES 1-PASS 2-PASS 3-PASS

123CC

2

GG BB

through bottom connection to
achieve rated performance.

EVAPORATOR

NOZZLE DIMENSIONS

2

DD

2

GG BB

2

LD07615

DD GG

T, V 8" 6" 4" 1'–10-3/4" 1'–3-1/2" 1'–3" 2'–6-1/2" 1'–3-1/2" 1'–3" 2'–6-1/2" 1'–3-1/2"

W, X 10" 8" 6" 2'–0-3/4" 1'–5-1/2" 1'–4-3/4" 2'–8-3/4" 1'–5-1/2" 1'–4-3/4" 2'–8-3/4" 1'–5-1/2"

NOTES:

1. Standard water nozzles are furnished as welding stub-outs with Victaulic grooves, allowing the option of welding, flanges, or use of
Victaulic couplings. Factory installed, class 150 (ANSI B16.5, round slip-on, forged carbon steel with 1/16" raised face), water flanged
nozzles are optional (add 1/2" to nozzle length). Companion flanges, nuts, bolts, and gaskets are not furnished.

2. Add 1" for isolators as shown.

3. One-, two- and three-pass nozzle arrangements are available only in pairs shown and for all shell codes. Any pair of evaporator nozzles
may be used in combination with any pair of condenser nozzles.

4. Connected piping should allow for removal of compact water boxes for tube access and cleaning.

5. Rear of unit is defined as side of chiller opposite control center.

28

YORK INTERNATIONAL

FORM 160.81-EG1

Dimensions (mm) – Nozzle Arrangements

EVAPORATORS – COMPACT WATER BOXES

REAR

OF UNIT

AH

CC CC

REAR

OF UNIT

REAR

OF UNIT

EVAPORATOR

1" 1"

MOTOR END COMPRESSOR END

DD

BB

EVAPORATOR EVAPORATOR

1"

MOTOR END COMPRESSOR END

GG GG

FLOOR LINE

B

C

GG GG

FLOOR LINE

EVAPORATOR

REAR

OF UNIT

1-PASS

NOZZLE

ARRANGEMENTS

NO. OF EVAP.

PASSES IN OUT

1

REAR

OF UNIT

AH
HA

2-PASS

NOZZLE

J

K

DD

BB

1"

REAR

OF UNIT

ARRANGEMENTS

NO. OF EVAP.

PASSES IN OUT

2

NOTE: Water must enter
through bottom connection to
achieve rated performance.

CB
KJ

3-PASS

F

G

DD

BB

EVAPORATOR EVAPORATOR

1" 1"

MOTOR END COMPRESSOR END

GG GG

FLOOR LINE

EVAPORATOR NOZZLE PIPE SIZE

SHELL

CODE

NO. OF PASSES 1-PASS 2-PASS 3-PASS

123CC

N

P

DD

BB

PASSES IN OUT

NOTE: Water must enter
through bottom connection to
achieve rated performance.

EVAPORATOR

NOZZLE DIMENSIONS

2

GG BB

2

DD

NOZZLE

ARRANGEMENTS

NO. OF EVAP.

3

2

GN
PF

GG BB

2

LD07615

DD GG

T, V 8" 6" 4" 578 343 330 775 343 330 775 394

W, X 10" 8" 6" 629 445 425 832 445 425 832 445

NOTES:

1. Standard water nozzles are furnished as welding stub-outs with Victaulic grooves, allowing the option of welding, flanges, or use of
Victaulic couplings. Factory installed, class 150 (ANSI B16.5, round slip-on, forged carbon steel with 1/16" raised face), water flanged
nozzles are optional (add 1/2" to nozzle length). Companion flanges, nuts, bolts, and gaskets are not furnished.

2. Add 1" for isolators as shown.

3. One-, two- and three-pass nozzle arrangements are available only in pairs shown and for all shell codes. Any pair of evaporator nozzles
may be used in combination with any pair of condenser nozzles.

4. Connected piping should allow for removal of compact water boxes for tube access and cleaning.

5. Rear of unit is defined as side of chiller opposite control center.

YORK INTERNATIONAL

29

FORM 160.81-EG1

Dimensions (Ft.-In.) – Nozzle Arrangements

CONDENSERS – COMPACT W ATER BOXES

FRONT

OF UNIT

QP

CC

CONDENSER CONDENSER

GG

COMPRESSOR END

U

T

CONDENSER CONDENSER

GG

COMPRESSOR END

Y

X

CONDENSER CONDENSER

GG

COMPRESSOR END

1"

OF UNIT

DD

BB

1"

OF UNIT

DD

BB

1"

FLOOR LINE

FRONT

FLOOR LINE

FRONT

FLOOR LINE

FRONT

OF UNIT

CC

1"

MOTOR END

FRONT

OF UNIT

DD

BB

1"

MOTOR END

FRONT

OF UNIT

W

DD

BB

1"

MOTOR END

1-PASS

NOZZLE

ARRANGEMENTS

NO. OF COND.

PASSES IN OUT

1

GG

PQ

QP

2-PASS

S

R

NOTE: Water must enter
through bottom connection to

GG

achieve rated performance

NOZZLE

ARRANGEMENTS

NO. OF COND.

PASSES IN OUT

2

RS
TU

3-PASS

NOZZLE

ARRANGEMENTS

V

GG

NO. OF COND.

PASSES IN OUT

3

NOTE: Water must enter
through bottom connection to
achieve rated performance

VY
XW

LD07982

CONDENSER NOZZLE PIPE SIZE

SHELL

CODE

NO. OF PASSES 1-PASS 2-PASS 3-PASS

12 3CC

2

GG BB

CONDENSER

NOZZLE DIMENSIONS

2

DD

2

GG BB

2

DD

2

GG

T, V 10" 6" 6" 2'–4-3/4" 1'–3" 1'–9-3/4" 2'–11-3/4" 1'–3" 1'–9-3/4" 2'–11-3/4" 1'–3"

W, X 12" 8" 6" 2'–6-3/4" 1'–3-1/2" 1'–11" 3'–2-1/2" 1'–3-1/2" 1'–11" 3'–2-1/2" 1'–3-1/2"

NOTES:

1. Standard water nozzles are furnished as welding stub-outs with Victaulic grooves, allowing the option of welding, flanges, or use of
Victaulic couplings. Factory installed, class 150 (ANSI B16.5, round slip-on, forged carbon steel with 1/16" raised face), water flanged
nozzles are optional (add 1/2" to nozzle length). Companion flanges, nuts, bolts, and gaskets are not furnished.

2. Add 1" for isolators as shown.

3. One-, two- and three-pass nozzle arrangements are available only in pairs shown and for all shell codes. Any pair of condenser nozzles
may be used in combination with any pair of evaporator nozzles.

4. Connected piping should allow for removal of compact water boxes for tube access and cleaning.

5. Front of unit is defined as side of chiller where control center is mounted.

30

YORK INTERNATIONAL

FORM 160.81-EG1

Dimensions (mm) – Nozzle Arrangements

CONDENSERS – COMPACT W ATER BOXES

FRONT

OF UNIT

QP

CC CC

CONDENSER CONDENSER

GG

COMPRESSOR END

U

T

CONDENSER CONDENSER

GG GG

COMPRESSOR END

1" 1"

FRONT

OF UNIT

DD

BB

1"

FRONT

OF UNIT

OF UNIT

FLOOR LINE

OF UNIT

FLOOR LINE

OF UNIT

FRONT

MOTOR END

FRONT

S

R

DD

BB

1"

MOTOR END

FRONT

GG

NOZZLE

ARRANGEMENTS

NO. OF COND.

PASSES IN OUT

1

PQ
QP

NOZZLE

ARRANGEMENTS

NO. OF COND.

PASSES IN OUT

2

NOTE: Water must enter
through bottom connection to
achieve rated performance

RS
TU

1-PASS

2-PASS

3-PASS

Y

X

DD

BB

CONDENSER CONDENSER

GG GG

COMPRESSOR END

1"

FLOOR LINE

DD

BB

1"

CONDENSER NOZZLE PIPE SIZE

SHELL

CODE

NO. OF PASSES 1-PASS 2-PASS 3-PASS

12 3CC

W

V

MOTOR END

2

GG BB

ARRANGEMENTS

NO. OF COND.

PASSES IN OUT

3

NOTE: Water must enter
through bottom connection to
achieve rated performance

CONDENSER

NOZZLE DIMENSIONS

2

DD

2

VY
XW

GG BB

LD07983

2

DD

2

GG

T, V 10" 6" 6" 730 381 553 908 381 553 908 381

W, X 12" 8" 6" 781 394 584 978 394 584 978 394

NOTES:

1. Standard water nozzles are furnished as welding stub-outs with Victaulic grooves, allowing the option of welding, flanges, or use of
Victaulic couplings. Factory installed, class 150 (ANSI B16.5, round slip-on, forged carbon steel with 1.59 mm raised face), water
flanged nozzles are optional (add 12.7 mm to nozzle length). Companion flanges, nuts, bolts, and gaskets are not furnished.

2. Add 25.4 mm for isolators as shown.

3. One-, two- and three-pass nozzle arrangements are available only in pairs shown and for all shell codes. Any pair of condenser nozzles
may be used in combination with any pair of evaporator nozzles.

4. Connected piping should allow for removal of compact water boxes for tube access and cleaning.

5. Front of unit is defined as side of chiller where control center is mounted.

NOZZLE

YORK INTERNATIONAL

31

Dimensions (In.) – Floor Layout

NEOPRENE ISOLA TORS

FLOOR LAYOUT

C

EVAPORATOR

L

C

SHELLS

END SHEET

C

CONDENSER

L

L

FORM 160.81-EG1

END SHEET

DIMENSION "C"
From Fig. 3
(pgs. 26 & 27)

7/8" DIA.
HOLE

3"

3"

8"

5-1/2"
4-1/2"

3/8" STEEL PLATE

1"

SUPPORT FOOT

6"

DIMENSIONS ARE

TYPICAL ALL 4 CORNERS

1/2"

4-1/2"

5-1/2"

DIMENSION "A"
From Fig. 3 (pgs. 26 & 27)

ISOLATOR TO BE CENTERED

UNDER SUPPORT FOOT

7"

6"

3/8" STEEL PLATE

1/2"

4-1/2"

5-1/2"

1/2"

32

1" DEFLECTED
HEIGHT

UNIT WEIGHT UP TO 16,365 LBS.

1" DEFLECTED
HEIGHT

UNIT WEIGHT 16,366 TO 28,835 LBS.

LD07610

YORK INTERNATIONAL

Dimensions (mm) – Floor Layout

NEOPRENE ISOLATORS

FLOOR LAYOUT

C

EVAPORATOR

L

C

SHELLS

END SHEET

C

CONDENSER

L

L

END SHEET

FORM 160.81-EG1

DIMENSION "C"
From Fig. 3
(pgs. 26 & 27)

22 mm DIA.
HOLE

76.2

76.2

152.4

25

203.2

140
114

13 mm STEEL PLATE

SUPPORT FOOT

DIMENSIONS ARE

TYPICAL ALL 4 CORNERS

13

ISOLATOR TO BE CENTERED

UNDER SUPPORT FOOT

114

140

25 mm DEFLECTED
HEIGHT

DIMENSION "A"
From Fig. 3 (pgs. 26 & 27)

178

152

13 mm STEEL PLATE

13

114

140

13

25 mm DEFLECTED
HEIGHT

UNIT WEIGHT UP TO 7,423 KGS.

YORK INTERNATIONAL

UNIT WEIGHT 7,423 TO 13,107 KGS.

LD07611

33

Dimensions – Floor Layout

SPRING ISOLA T ORS

FORM 160.81-EG1

(Pgs. 26 & 27)

(Pgs. 26 & 27)

ALL DIMENSIONS ARE IN INCHES

LD07378

(Pgs. 26 & 27)

34

(Pgs. 26 & 27)

ALL DIMENSIONS ARE IN MILLIMETERS

LD07379

YORK INTERNATIONAL

FORM 160.81-EG1

Weights

UNIT WEIGHTS

SHIPPING OPERATING REFRIGERANT LOADING PER

COMP. SHELLS WEIGHT WEIGHT CHARGE ISOLATOR

(LBS) (KG) (LBS) (KG) (LBS) (KG) (LBS) (KG)

TBTB 11,860 5,380 13,110 5,948 650 295 3,278 1,485
TBTC 11,910 5,400 13,200 5,988 650 295 3,303 1,495
TBTD 12,010 5,450 13,350 6,053 650 295 3,338 1,515
TCTB 11,960 5,425 13,250 6,013 650 295 3,313 1,500
TCTC 12,010 5,450 13,340 6,053 650 295 3,338 1,515
TCTD 12,110 5,495 13,490 6,123 650 295 3,373 1,530
TDTB 12,070 5,475 13,410 6,083 650 295 3,353 1,520
TDTC 12,120 5,500 13,500 6,123 650 295 3,378 1,530

T0/T1

T1 WCWC 15,110 6,854 17,800 8,074 1,250 567 4,450 2,019

T2/T3 WDWD 18,810 8,532 21,740 9,861 1,250 567 5,435 2,465

TDTD 12,220 5,540 13,650 6,193 650 295 3,413 1,545
VBVB 12,680 5,750 14,320 6,495 900 408 3,580 1,625
VBVC 12,750 5,785 14,450 6,555 900 408 3,615 1,640
VBVD 12,890 5,845 14,660 6,649 900 408 3,665 1,665
VCVB 12,820 5,815 14,520 6,586 900 408 3,630 1,645
VCVC 12,900 5,850 14,650 6,645 900 408 3,665 1,665
VCVD 13,030 5,910 14,850 6,735 900 408 3,715 1,685
VDVB 12,990 5,890 14,750 6,690 900 408 3,690 1,675
VDVC 13,070 5,930 14,890 6,755 900 408 3,725 1,690

VDVD 13,200 5,990 15,090 6,845 900 408 3,775 1,710
WBWB 14,660 6,650 17,160 7,784 1,250 567 4,290 1,946
WBWC 14,930 6,772 17,550 7,961 1,250 567 4,388 1,990
WBWD 15,520 7,040 18,020 8,174 1,250 567 4,505 2,043
WCWB 14,840 6,731 17,410 7,897 1,250 567 4,353 1,975

WCWD 15,440 7,004 18,280 8,292 1,250 567 4,570 2,073
WDWB 15,070 6,836 17,730 8,042 1,250 567 4,433 2,011
WDWC 15,340 6,958 18,120 8,219 1,250 567 4,530 2,055
WDWD 15,670 7,108 18,600 8,437 1,250 567 4,650 2,109
WBWB 17,810 8,079 20,310 9,213 1,250 567 5,078 2,303
WBWC 18,070 8,197 20,690 9,384 1,250 567 5,172 2,346
WBWD 18,400 8,346 21,170 9,603 1,250 567 5,293 2,400
WCWB 17,990 8,160 20,560 9,326 1,250 567 5,140 2,331
WCWC 18,260 8,283 20,950 9,503 1,250 567 5,238 2,375
WCWD 18,580 8,428 21,420 9,716 1,250 567 5,355 2,429
WDWB 18,220 8,265 20,880 9,471 1,250 567 5,220 2,367
WDWC 18,490 8,387 21,270 9,648 1,250 567 5,318 2,412

XBXB 19,110 8,669 22,200 10,070 1,550 703 5,550 2,518

XBXC 19,370 8,786 22,620 10,260 1,550 703 5,655 2,565

XBXD 19,700 8,935 23,150 10,500 1,550 703 5,788 2,625

XCXB 19,360 8,782 22,540 10,224 1,550 703 5,635 2,556

XCXC 19,620 8,900 22,960 10,415 1,550 703 5,740 2,603

XCXD 19,950 9,049 23,490 10,655 1,550 703 5,873 2,664

XDXB 19,670 8,922 22,970 10,419 1,550 703 5,743 2,605

XDXC 19,940 9,045 23,400 10,614 1,550 703 5,850 2,654

XDXD 20,260 9,190 23,920 18,850 1,550 703 5,980 2,713

SOLID STATE STARTER WEIGHT

SIZE LBS KGS

7L, 14L 200 91

26L, 33L 300 136

YORK INTERNATIONAL

35

Guide Specifications

FORM 160.81-EG1

GENERAL

Furnish and install where indicated on the drawings
YORK M
unit shall produce a capacity of
GPM of
with
°F. Power input shall not exceed
(NPLV) of
selected for
maximum liquid pressure drop of
shall be designed for 150 or 300 psig working pressure.
The condenser shall be selected for
factor and maximum liquid pressure drop of ____ ft.
Water side shall be designed for 150 or 300 psig work­ing pressure. Power shall be supplied to the compres­sor motor at
controls at 115 volts –1-phase – (60)(50) Hertz.

Furnish and install where indicated on the drawings
YORK M
unit shall produce a capacity of
of
____ L/S of condenser water at °C. Power input
shall not exceed
____. The evaporator shall be selected for
fouling factor and a maximum liquid pressure drop of
___ kPa. Water side shall be designed for 1034 or 2068
kPa working pressure. The condenser shall be selected
for
pressure drop of
for 1034 or 2068 kPa working pressure. Power shall be
supplied to the compressor motor at
– 50 Hz and controls at 115 volts – 1-phase – 50 Hz.

Performance shall be certified or rated in accordance
with the latest edition of ARI Standard 550/590-98 as
applicable. Only chillers that are listed in the ARI Certi­fication Program for Water Chilling Packages using the
vapor compression cycle are acceptable.

Each unit shall be completely factory packaged includ­ing evaporator, condenser , subcooler , oil separator, com­pressor/motor, lubrication system, OptiView Control
Center, Solid State Starter (optional), refrigerant isola­tion valves (optional) and all interconnecting piping and
wiring. The factory package shall consist of a “Leaktight”

AXE Rotary Screw Liquid Chilling Unit(s). Each

tons, cooling

from °F to °F when supplied

_____ GPM of condenser water at

kW with an IPLV

_____. The evaporator shall be

ft2 °F hr/BTU fouling factor and a

ft. Water side

fouling

volts – 3-phase – (60)(50) Hertz and

– (or) –

AXE Rotary Screw Liquid Chilling Unit(s). Each

kW, cooling L/S

from °C to °C when supplied with

kW with an IPLV (NPLV) of

M2 °C/W

M2 °C/W fouling factor and maximum liquid

kPa. Water side shall be designed

volts – 3-phase

design, with no pipe thread connections that can loosen
and leak over time. All units shall ship with a full charge
of refrigerant HFC-134a and oil. Alternatively , the chiller
shall be shipped with the compressor, control panel and
oil separator removed (Form 3) or also with the shells
separated (Form 7) to allow rigging into the equipment
room. All units that ship disassembled shall be assembled
and factory run tested prior to disassembly and shipment).

Compressor

The compressor shall be a rotary-screw type. The com­pressor housing shall be of cast iron, precision machined
to provide minimal clearance for the rotors. The rotors
shall be manufactured from forged steel and use asym­metric profiles operating at a maximum speed of (3570
RPM/60 Hz) (2975 RPM/50 Hz). The compressor shall
incorporate a complete anti-friction bearing design to re­duce power and increase reliability; four separate cylin­drical roller bearings to handle radial loads; and two 4­point angular contact ball bearings to handle axial loads.
A check valve shall be incorporated in the compressor
housing to prevent rotor backspin during shutdown.

Capacity control shall be achieved by use of a slide
valve to provide fully modulating control from 100% to
20% of full-load. The slide valve shall be actuated by
system differential pressure, controlled by external so­lenoid valves through the OptiView Control Center . The
unit shall be capable of operating with lower tempera­ture cooling tower water during part-load operation in
accordance with ARI Standard 550/590.

Lubrication System

An adequate supply of oil shall be available to the com­pressor at all times. During start-up and coastdown, this
shall be achieved by oil reservoirs in the compressor.
During operation, oil shall be delivered by positive sys­tem pressure differential.

All chillers shall be provided with a single oil filter hous­ing with isolation valves. An optional dual filter is avail­able which allows immediate switching from one filter
to the other, eliminating downtime during filter changes.
The off-line oil filter must be capable of being changed
during chiller operation. The chiller shall ship with a 3
micron absolute oil filter, (two filters for dual filter op­tion) maintaining a clean oil system and ensuring supe­rior compressor life.

36

YORK INTERNATIONAL

FORM 160.81-EG1

A 500W immersion oil heater shall be provided and
temperature actuated to effectively remove refrigerant
from the oil. Power wiring to the Control Center shall be
factory installed. An oil eductor shall be provided to au­tomatically remove oil which may have migrated to the
evaporator and return it to the compressor. The oil sepa­rator shall be of a vertical design with no moving parts,
and shall provide high-efficiency oil separation before
the refrigerant enters the heat exchangers. The oil sepa­rator shall be designed, tested and stamped in accor­dance with ASME Boiler and Pressure Vessel Code,
Section VIII – Division 1.

Motor

The motor shall be 2-pole, continuous duty , cage induc­tion type, and shall utilize suction gas cooling (semi-her­metic design). Motor full-load amperes at design condi­tions shall not exceed motor nameplate (FLA). Motor shall
be designed for use with the type starter specified.

For units utilizing remote electromechanical starters, a
large steel terminal box with gasketed front access cover
shall be provided for field connected conduit. Overload/
overcurrent transformers shall be furnished with all units.
(For units furnished with factory packaged Solid State
Starters, refer to the “Options” section.)

Water boxes shall be removable to permit tube clean­ing and replacement. Stubout water connections hav­ing Victaulic grooves shall be provided. Water boxes
shall be designed for 150 psig (1034 kPa) design work­ing pressure. Vent and drain connections with plugs shall
be provided on each water box.

Condenser

Condenser shall be of the shell-and-tube type, designed
for 235 psig (1620 kPa) working pressure on the refrig­erant side. Shell shall be fabricated from rolled carbon
steel plate with fusion welded seams or carbon steel
pipe; have carbon steel tube sheets, drilled and reamed
to accommodate the tubes; and intermediate tube sup­ports spaced no more than four feet apart. A refrigerant
subcooler shall be provided for improved cycle effi­ciency. The refrigerant side shall be designed, tested
and stamped in accordance with ASME Boiler and Pres­sure Vessel Code, Section VIII – Division 1. Tubes shall
be high-efficiency, internally enhanced type. Each tube
shall be roller expanded into the tube sheets providing
a leak-proof seal, and be individually replaceable. Wa­ter velocity through the tubes shall not exceed 12 FPS.
The condenser shall have refrigerant relief device to
meet the requirements of ASHRAE 15 Safety Code for
Mechanical Refrigeration.

Evaporator

Evaporator shall be of the shell-and-tube, flooded type
designed for 235 psig (1620 kPa) working pressure on
the refrigerant side. Shell shall be fabricated from rolled
carbon steel plate with fusion welded seams or carbon
steel pipe; have carbon steel tube sheets, drilled and
reamed to accommodate the tubes; and intermediate
tube supports spaced no more than four feet apart. The
refrigerant side shall be designed, tested and stamped
in accordance with ASME Boiler and Pressure Vessel
Code, Section VIII – Division 1. Tubes shall be high­efficiency , internally enhanced type. Each tube shall be
roller expanded into the tube sheets providing a leak­proof seal, and be individually replaceable. Water ve­locity through the tubes shall not exceed 12 FPS (3.6
m/s). Liquid level sight glass shall be located on the
side of the shell to aid in determining proper refrigerant
charge. The evaporator shall have a refrigerant relief
device to meet the requirements of ASHRAE 15 Safety
Code for Mechanical Refrigeration.

Water boxes shall be removable to permit tube clean­ing and replacement. Stubout water connections hav­ing Victaulic grooves shall be provided. Water Boxes
shall be designed for 150 psig (1034 kPa) design work­ing pressure. Vent and drain connections with plugs shall
be provided on each water box.

Refrigerant System

The YR chiller is equipped with a refrigerant metering
device consisting of a fully modulating variable orifice
controlled via the OptiView Control Center. This control
ensures proper refrigerant flow to the evaporator over a
wide range of operating conditions, including thermal stor­age applications and chilled water reset. V alve operation
is programmable and can be customized for a specific
application via the OptiView Control Center keypad.

The condenser shell shall be capable of storing the en­tire system refrigerant charge during servicing. Isola­tion from the rest of the system shall be by manually

YORK INTERNATIONAL

37

Guide Specifications

FORM 160.81-EG1

operated isolation valves located at the inlet to the oil
separator and outlet of the condenser (isolation valves
optional). Additional valves shall be provided to facili­tate removal of refrigerant charge from the system.

OPTIVIEW CONTROL CENTER
General – The chiller shall be controlled by a stand-alone

microprocessor based control center. The chiller control
panel shall provide control of chiller operation and moni­toring of chiller sensors, actuators, relays and switches.

Control Panel – The control panel shall include a 10.4­in. diagonal color liquid crystal display (LCD) surrounded
by "soft " keys which are redefined based on the screen
displayed at that time. This shall be mounted in the middle
of a keypad interface and installed in a locked enclosure.
The screen shall detail all operations and parameters,
using a graphical representation of the chiller and its ma­jor components. Panel verbiage shall be available in other
languages as an option with English always available.
Data shall be displayed in either English or Metric units.
Smart Freeze Point Protection shall run the chiller at 36°F
(2.22°C) leaving chilled water temperature, and not have
nuisance trips on low water temperature. The sophisti­cated program and sensor shall monitor the chiller water
temperature to prevent freeze-up. When needed, Hot Gas
Bypass is available as an option. The panel shall display
countdown timer messages so the operator knows when
functions are starting and stopping. Every programmable
point shall have a pop-up screen with the allowable
ranges, so that the chiller can not be programmed to
operate outside of its design limits.

The control panel shall be provided with a thermal ice
storage control mode to enhance system performance
during ice building operation. In the thermal storage con­trol mode, the chiller shall stay at 100% load until the
setpoint shutdown temperature is reached. To add
greater operating flexibility and eliminate unnecessary
chiller cycling, two different Low Water (Liquid) Tem­perature Restart Thresholds shall be programmable, one
for the ice mode and one for the standard cooling mode.
The chiller shall have the capability to remain in the
standard control mode for temperatures between 20 to
70°F (-6.7 to 21.1°C) for applications involving a pro­cess cooling duty that requires leaving chilled liquid tem­perature setpoint control.

The chiller control panel shall also provide:

1. System operating information including:
a. Return and leaving chilled water temperature
b. Return and leaving condenser water temp.
c. Evaporator and condenser saturation temp.

d. Oil pressure at compressor and oil filter

differential
e. Percent motor current
f. Evaporator and condenser saturation temp.
g. Compressor discharge temperature
h. Percent slide valve position
i. Operating hours
j. Number of unit starts

2. Digital programming of setpoints through the uni­versal keypad including:

a. Leaving chilled water temperature
b. Percent current limit
c. Pull-down demand limiting
d. Six-week schedule for starting and stopping the

chiller, pumps and tower

e. Remote reset temperature range

3. Status messages indicating:
a. System ready to start
b. System running
c. System lockout
d. System safety shutdown-manual restart
e. System cycling shutdown-auto restart
f. System startup
g. Start inhibit

4. The text displayed within the system status and
system details field shall be displayed as a color
coded message to indicate severity: red for safety
fault, orange for cycling faults, yellow for warnings,
and green for normal messages.

5. Safety shutdowns enunciated through the display
and the status bar, and consist of system status,
system details, day, time, cause of shutdown,
and type of restart required. Safety shutdowns shall
include:

a. Evaporator - low pressure
b. Evaporator - low pressure - smart freeze
c. Evaporator - transducer or leaving liquid probe
d. Evaporator - transducer or temperature sensor
e. Condenser - high pressure contacts open
f. Condenser - high pressure
g. Condenser - pressure transducer out of range
h. Auxiliary safety - contacts closed
i. Discharge - high temperature
j. Discharge - low temperature
k. Oil - low differential pressure
l. Oil or condenser transducer error
m. Oil - clogged filter

38

YORK INTERNATIONAL

FORM 160.81-EG1

n. Oil - high pressure
o. Control panel - power failure
p. Watchdog - software reboot

5.1. Safety shutdowns with a Solid State Starter
(LCSSS) shall include:

a. Shutdown - requesting fault data...
b. High instantaneous current
c. High phase (X) heatsink temperature - running
d. 105% motor current overload
e. Motor or starter - current imbalance
f. Phase (X) shorted SCR
g. Open SCR
h. Phase rotation

6. Cycling shutdowns enunciated through the display
and the status bar, and consisting of system sta­tus, system details, day , time, cause of shutdown,
and type of restart required.

Cycling shutdowns shall include:
a. Multiunit cycling - contacts open
b. System cycling - contacts open
c. Control panel - power failure
d. Leaving chilled liquid - low temperature
e. Leaving chilled liquid - flow switch open
f. Condenser - flow switch open
g. Motor controller - contacts open
h. Motor controller - loss of current
i. Power fault
j. Control panel - schedule

6.1 Cycling shutdowns with a Solid State Starter
(LCSSS) shall include:

a. Initialization failed
b. Serial communications
c. Requesting fault data
d. Stop contacts open
e. Power fault
f. Low phase (X) temperature sensor
g. Run signal
h. Invalid current scale selection
i. Phase locked loop
j. Low supply line voltage
k. High supply line voltage
l. Logic board processor
m.Logic board power supply
n. Phase loss

7. Security access to prevent unauthorized change
of setpoints, to allow local or remote control of
the chiller, and to allow manual operation of the
variable orifice and slide valve position. Access
shall be through ID and password recognition,
which is defined by three different levels of user
competence: view, operator, and service.

8. Trending data with the ability to customize points
of once every second to once every hour. The panel
shall trend up to 6 different parameters from a list
of over 140, without the need of an external moni­toring system.

9. The operating program stored in non-volatile
memory (EPROM) to eliminate reprogramming the
chiller due to AC power failure or battery discharge.
Programmed setpoints shall be retained in lithium
battery-backed RTC memory for a minimum of 11
years with power removed from the system.

10. A fused connection through a transformer in the
compressor motor starter to provide individual
over-current protected power for all controls.

11. A numbered terminal strip for all required field in­terlock wiring.

12. An RS-232 port to output all system operating data,
shutdown/cycling message, and a record of the last
10 cycling or safety shutdowns to a field-supplied
printer. Data logs to a printer at a set program­mable interval. This data can be preprogrammed
to print from 1 minute to 1 day.

13. The capability to interface with a building automa­tion system to provide:

a. Remote chiller start and stop
b. Remote leaving chiller liquid temperature adjust
c. Remote current limit setpoint adjust
d. Remote ready to start contacts
e. Safety shutdown contacts
f. Cycling shutdown contacts
g. Run contacts

COMPRESSOR MOTOR STARTER
(OPTION, 200 - 600V)

The chiller manufacturer shall furnish a reduced-volt­age Solid State Starter for the compressor motor. Starter
shall be factory-mounted and wired on the chiller. The
starter shall provide, through the use of silicon controlled
rectifiers, a smooth acceleration of the motor without
current transitions or transients. The starter enclosure
shall be NEMA 1, with a hinged access door with lock
and key . Electrical lugs for incoming power wiring shall
be provided.

YORK INTERNATIONAL

39

Guide Specifications

Standard features include: digital readout at the OptiV­iew Control Center of the following:

Display Only:

• 3-phase voltage A, B, C

• 3-phase current A, B, C

• Input power (kW)

• kW Hours

• Starter Model

• Motor Run (LED)

• Motor Current % Full-load Amps

• Current Limit Setpoints

• Pulldown Demand Time Left

Programmable:

• Local Motor Current Limit

• Pulldown Demand Limit

• Pulldown Demand Time

Other features include: low-line voltage, 115-volt con­trol transformer; three-leg sensing overloads; phase ro­tation and single-phase failure protection; high tempera­ture safety protection, motor current imbalance and
undervoltage safeties; open and close SCR protection;
momentary power interruption protection. The LCSSS
is cooled by a closed loop, fresh water circuit consist­ing of a water-to-water heat exchanger and 1/25 HP
circulating pump. All interconnecting water piping is
factory installed and rated for 150 PSIG working pres­sure. Optional unit-mounted circuit breaker includes

ground fault protection and provides 65,000 amp. Short
circuit withstand rating in accordance with UL Standard

508. A non-fused disconnect switch is also available.
Both options are padlockable.

REMOTE ELECTRO-MECHANICAL COMPRES­SOR MOTOR STARTER (OPTIONAL)

A remote electro-mechanical starter of the R-1131 type
shall be furnished for each compressor motor. The
starter shall be furnished in accordance with the chiller
manufacturer’s starter specifications and as specified
elsewhere in these specifications.

PORTABLE REFRIGERANT STORAGE/RECY­CLING SYSTEM

A portable, self-contained refrigerant storage/recycling
system shall be provided consisting of a refrigerant com­pressor with oil separator, storage receiver , water cooled
condenser, filter drier and necessary valves and hoses
to remove, replace and distill refrigerant. All necessary
controls and safety devices shall be a permanent part
of the system.

START-UP AND OPERATOR TRAINING

The chiller manufacturer shall include the services of a
factory-trained, field service representative to super­vise the final leak testing, charging and the initial start­up and concurrent operator instruction.

P.O. Box 1592, York, Pennsylvania USA 17405-1592 Subject to change without notice. Printed in USA
Copyright © by York International Corporation 2002 ALL RIGHTS RESERVED

Form 160.81-EG1 (502)
Supersedes 160.81-EG1 (302)

T ele. 800-861-1001

www.york.com