York R123, YT User Manual

4.5 (6)
York R123, YT User Manual

MILLENNIUM ®

CENTRIFUGAL LIQUID CHILLERS

OPERATING & MAINTENANCE Supersedes: 160.55-O1 (402)

Form 160.55-O1 (604)

 

 

MODEL YT (STYLE J)

R123 COOLING ONLY

WITH OPTIVIEWCONTROL CENTER

FOR ELECTRO-MECHANICAL STARTER,

SOLID STATE STARTER & VARIABLE SPEED DRIVE

29509A

FORM 160.55-O1 (604)

2

YORK INTERNATIONAL

FORM 160.55-O1 (604)

IMPORTANT!

READ BEFORE PROCEEDING!

GENERAL SAFETY GUIDELINES

This equipment is a relatively complicated apparatus. During installation, operation, maintenance or service, individuals may be exposed to certain components or conditions including, but not limited to: refrigerants, oils, materials under pressure, rotating components and both high and low voltage. Each of these items has the potential, if misused or handled improperly, to cause bodily injury or death. It is the obligation and responsibility of operating/service personnel to identify and recognize these inherent hazards, protect themselves and proceed safely in completing their tasks. Failure to comply with any of these requirements could result in serious damage to the equipment and the property in

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

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

SAFETY SYMBOLS

The following symbols are used in this document to alert the reader to areas of potential hazard:

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

CAUTION identifies a hazard which could lead to damage to the machine, damage to other equipment and/or environmental pollution. Usually an instruction will be given, together with a brief explanation.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

NOTE is used to highlight additional information which may be helpful to you.

External wiring, unless specified as an optional connection in the manufacturer’s product line, is NOT to be connected inside the micro panel cabinet. Devices such as relays, switches, transducers and controls may NOT be installed inside the micro panel. NO external wiring is allowed to be run through the micro panel. All wiring must be in accordance with YORK’s published specifications and must be performed ONLY by qualified YORK personnel. YORK will not be responsible for damages/problems resulting from improper connections to the controls or application of improper control signals. Failure to follow this will void the manufacturer’s warranty and cause serious damage to property or injury to persons.

YORK INTERNATIONAL

3

FORM 160.55-O1 (604)

CHANGEABILITY OF THIS DOCUMENT

In complying with YORK’s policy for continuous product improvement, the information contained in this document is subject to change without notice. While YORK makes no commitment to update or provide current information automatically to the manual owner, that information, if applicable, can be obtained by contacting the nearest YORK Applied Systems Service ofÞce.

It is the responsibility of operating/service personnel as to the applicability of these documents to the equipment in question. If there is any question in the mind of operating/service personnel as to the applicability of these documents, then, prior to working on the equipment, they should verify with the owner whether the equipment has been modiÞed and if current literature is available.

REFERENCE INSTRUCTIONS

 

 

DESCRIPTION

FORM NO.

 

 

 

 

 

 

 

 

 

 

SOLID STATE STARTER (MOD “A”) – OPERATION & MAINTENANCE

160.46-OM3.1

 

 

 

 

 

 

 

 

 

SOLID STATE STARTER (MOD “B”) – OPERATION & MAINTENANCE

160.00-02

 

 

 

 

 

 

 

 

 

 

 

 

VARIABLE SPEED DRIVE – OPERATION

160.00-O1

 

 

 

 

 

 

 

 

VARIABLE SPEED DRIVE – SERVICE INSTRUCTIONS

160.00-M1

 

 

 

 

 

 

 

 

 

 

 

INSTALLATION

160.55-N1

 

 

 

 

 

 

 

 

 

OPTIVIEW CONTROL CENTER - SERVICE INSTRUCTIONS

160.55-M1

 

 

 

 

 

 

 

 

 

WIRING DIAGRAM – UNIT WITH ELECTRO-MECHANICAL STARTER

160.55-PW1

 

 

 

 

 

 

 

 

 

 

WIRING DIAGRAM – UNIT WITH SOLID STATE STARTER (MOD “B”)

160.55-PW2

 

 

 

 

 

 

 

 

 

WIRING DIAGRAM – UNIT WITH VARIABLE SPEED DRIVE

160.55-PW3

 

 

 

 

 

 

 

RENEWAL PARTS – UNIT

160.48-RP5

 

 

 

 

 

 

 

 

RENEWAL PARTS – GRAPHIC CONTROL CENTER

160.55-RP1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOMENCLATURE

The model number denotes the following characteristics of the unit

 

 

 

YT

K3

C4

E2

 

CR

 

J

Model

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Design Level

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooler Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Motor Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Condenser Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Supply

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

— for 60 Hz

 

Compressor Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 for 50 Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

YORK INTERNATIONAL

 

 

 

FORM 160.55-O1 (604)

 

 

TABLE OF CONTENTS

 

 

 

 

 

SECTION

1

Description of System and Fundamentals of Operation

............................... 7

 

 

 

 

SECTION

2

OptiView Control Center .............................................................................

9

 

 

 

 

SECTION

3

Printers .....................................................................................................

112

 

 

 

 

SECTION

4

System Operating Procedures ..................................................................

124

 

 

 

 

SECTION

5

System Components Description .............................................................

131

 

 

 

 

SECTION

6

Operational Maintenance .........................................................................

135

 

 

 

 

SECTION

7

Troubleshooting........................................................................................

138

 

 

 

 

SECTION

8

Maintenance .............................................................................................

144

 

 

 

 

SECTION

9

Preventive Maintenance ...........................................................................

152

 

 

 

 

SECTION

10

OptiSave Energy Analyser Feature ..........................................................

154

 

 

 

 

YORK INTERNATIONAL

5

FORM 160.55-O1 (604)

LIST OF FIGURES

FIG. 1

MODEL YT MILLENNIUM CHILLER ....................

7

FIG. 2

REFRIGERANT FLOW-THROUGH CHILLER.....

8

 

 

DETAIL A – COMPRESSOR PREROTATION

 

 

 

VANES..................................................................

8

FIG. 3

CONTROL CENTER ..........................................

12

FIG. 4

HOME SCREEN.................................................

16

FIG. 5

SYSTEM SCREEN.............................................

18

FIG. 6

EVAPORATOR SCREEN ...................................

20

FIG. 7

CONDENSER SCREEN.....................................

22

FIG. 8

PURGE SCREEN...............................................

24

FIG. 9

– REFRIGERANT LEVEL CONTROL SCREEN ...

26

FIG. 10

COMPRESSOR SCREEN..................................

28

FIG. 11

– HOT GAS BYPASS SCREEN ............................

30

FIG. 12

SURGE PROTECTION SCREEN ......................

32

FIG. 13

PRE-ROTATION VANES CALIBRATION

 

 

 

SCREEN.............................................................

36

FIG. 14

VSD TUNING SCREEN .....................................

38

FIG. 15

OIL SUMP SCREEN...........................................

40

FIG. 16

ELECTRO-MECHANICAL STARTER SCREEN 41

FIG. 17

SOLID STATE STARTER

 

 

 

(MOD A) SCREEN..............................................

42

FIG. 18

SOLID STATE STARTER

 

 

 

(MOD B) SCREEN .............................................

44

FIG. 19

– VARIABLE SPEED DRIVE SCREEN .................

46

FIG. 20

– VARIABLE SPEED DRIVE DETAILS SCREEN

 

 

 

(All VSD except Part Number 371-02767-XXX

 

 

 

(60 Hz) or 371-03700-XXX (50 Hz)) ...................

48

FIG. 21 – VARIABLE SPEED DRIVE DETAILS SCREEN

 

 

 

(VSD with Part Number 371-02767-XXX

 

 

 

(60 Hz) or 371-03700-XXX (50 Hz)) ...................

50

FIG. 22

– ADAPTIVE CAPACITY CONTROL DETAILS

 

 

 

SCREEN.............................................................

52

FIG. 23

– HARMONIC FILTER DETAILS SCREEN

 

 

 

(All VSD except Part Number 371-02767-XXX

 

 

 

(60 Hz) or 371-03700-XXX (50 Hz)) ...................

54

FIG. 24

– HARMONIC FILTER DETAILS SCREEN

 

 

 

(VSD with Part Number 371-02767-XXX (60 Hz)

 

 

 

or 371-03700-XXX (50 Hz))................................

56

FIG. 25

SETPOINTS SCREEN .......................................

58

FIG. 26

SETUP SCREEN................................................

60

FIG. 27

SCHEDULE SCREEN ........................................

64

FIG. 28

USER SCREEN..................................................

66

FIG. 29

COMMS SCREEN..............................................

68

FIG. 30

PRINTER SCREEN............................................

70

FIG. 31

SALES ORDER SCREEN ..................................

72

FIG. 32

OPERATIONS SCREEN ....................................

74

6

FIG. 33

HISTORY SCREEN............................................

76

FIG. 34

HISTORY DETAILS SCREEN ............................

78

FIG. 35

SECURITY LOG SCREEN.................................

79

FIG. 36

– SECURITY LOG DETAILS SCREEN .................

80

FIG. 37

TREND SCREEN ...............................................

82

FIG. 38

TREND SETUP SCREEN ..................................

84

FIG. 39

– ADVANCED TREND SETUP SCREEN..............

86

FIG. 40

COMMON SLOTS SCREEN ..............................

88

FIG. 41

CUSTOM VIEW SCREEN..................................

89

FIG. 42

– CUSTOM VIEW SETUP SCREEN.....................

90

FIG. 43

PRINTERS ........................................................

112

FIG. 44

SAMPLE PRINTOUT (STATUS)........................

116

FIG. 45

SAMPLE PRINTOUT (SETPOINTS).................

110

FIG. 46

SAMPLE PRINTOUT (SCHEDULE)..................

119

FIG. 47

– SAMPLE PRINTOUT (SALES ORDER)...........

120

FIG. 48

SAMPLE PRINTOUT (HISTORY) ....................

121

FIG. 49

– SAMPLE PRINTOUT (SECURITY LOG)..........

122

FIG. 50

SAMPLE PRINTOUT (TREND)........................

123

FIG. 51

SAMPLE PRINTOUT

 

 

 

(CUSTOM SCREEN REPORT)........................

123

FIG. 52

SAMPLE PRINTOUT

 

 

 

(ADAPTIVE CAPACITY CONTROL NEW MAP

 

 

 

POINT REPORT) ............................................

123

FIG. 53

SAMPLE PRINTOUT

 

 

 

(ADAPTIVE CAPACITY CONTROL EXISTING

 

 

 

MAP POINTS REPORT) ..................................

123

FIG. 54

– OPERATION SEQUENCE & TIMING

 

 

 

DIAGRAM (ELECTRO-MECHANICAL

 

 

 

& SOLID STATE STARTER APPLICATIONS)..

126

FIG. 55

– OPERATION SEQUENCE & TIMING

 

 

 

DIAGRAM (COMPRESSOR MOTOR

 

 

 

VARIABLE SPEED DRIVE APPLICATIONS) ...

126

FIG. 56

MINIMUM ENTERING CONDENSING

 

 

 

WATER TEMPERATURE .................................

127

FIG. 57

– LIQUID CHILLER LOG SHEETS .....................

127

FIG. 58

TURBOGUARD PURGE UNIT.........................

129

FIG. 59

– SCHEMATIC DRAWING (YT) COMPRESSOR

 

 

 

LUBRICATION SYSTEM..................................

132

FIG. 60

OIL RETURN SYSTEM ....................................

135

FIG. 61

ASSEMBLY OF DEHYDRATOR.......................

136

FIG. 62

– CHARGING OIL RESERVOIR WITH OIL ........

137

FIG. 63

EVACUATION OF CHILLER ............................

145

FIG. 64

SATURATION CURVE .....................................

147

FIG. 65

– DIAGRAM - MEGGING MOTOR WINDINGS ..

149

FIG. 66

– MOTOR STATOR TEMPERATURE &

 

 

 

INSULATION RESISTANCES ..........................

150

 

 

YORK INTERNATIONAL

FORM 160.55-O1 (604)

SECTION 1

DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION

 

 

COMPRESSOR

 

PURGE

CONTROL

 

 

 

1

UNIT

CENTER

 

 

MOTOR

 

 

CONDENSER

 

 

 

 

 

 

29509A

FIG. 1 – MODEL YT MILLENNIUM CHILLER

COOLER

SYSTEM OPERATION DESCRIPTION (SEE FIG. 2)

combination Logic/Trigger Board that interfaces the

The YORK Model YT Millennium Chiller is commonly

Control Center with a serial communications link. Ear-

lier vintage chillers, such as those encountered in Control

applied to large air conditioning systems, but may be

Center retroÞt applications are equipped with the Mod

used on other applications. The chiller consists of an

“A” starter. This Starter contains a Trigger Board that

open motor mounted to a compressor (with integral

interfaces to a Logic Board that is installed inside of the

speed increasing gears) condenser, cooler and variable

Control Center.

ßow control.

 

The chiller is controlled by a modern state of the art

In operation, a liquid (water or brine to be chilled) ßows

through the cooler, where boiling refrigerant absorbs heat

OptiView Control Center that monitors its operation. The

from the liquid. The chilled liquid is then piped to fan

Control Center is programmed by the operator to suit job

coil units or other air conditioning terminal units, where

speciÞcations. Automatic timed start-ups and shutdowns

it ßows through Þnned coils, absorbing heat from the

are also programmable to suit nighttime, weekends and

air. The warmed liquid is then returned to the chiller to

holidays. The operating status, temperatures, pressures

complete the chilled liquid circuit.

and other information pertinent to operation of the chiller

are automatically displayed and read on a graphic mes-

The refrigerant vapor, which is produced by the boiling

sage display. Other displays can be observed by pressing

action in the cooler, ßows to the compressor where the

the keys as labeled on the Control Center. The chiller

rotating impeller increases its pressure and temperature

with the OptiView Control Center is applied with an

and discharges it into the condenser. Water ßowing

electro-mechanical starter, YORK Solid State Starter

through the condenser tubes absorbs heat from the refrig-

(optional) or Variable Speed Drive (optional).

erant vapor, causing it to condense. The condenser water

There could be either of two different Solid State Start-

is supplied to the chiller from an external source, usually

ers applied. New production chillers are equipped with

a cooling tower. The condensed refrigerant drains from

the Mod “B” Solid State Starter. This starter contains a

the condenser into the liquid return line, where the vari-

YORK INTERNATIONAL

7

Description of System and Fundamentals of Operation

FORM 160.55-O1 (604)

7619A(D)

DETAIL A – COMPRESSOR PREROTATION VANES

able oriÞce meters the ßow of liquid refrigerant to the cooler to complete the refrigerant circuit.

The major components of a chiller are selected to handle the refrigerant, which would be evaporated at full load design conditions. However, most systems will be called upon to deliver full load capacity for only a relatively small part of the time the unit is in operation.

CAPACITY CONTROL

The major components of a chiller are selected for full load capacities, therefore capacity must be controlled to maintain a constant chilled liquid temperature leaving the cooler. Prerotation vanes (PRV), located at the entrance to the compressor impeller, compensate for variation in load (See Fig. 2, Detail A).

The position of these vanes is automatically controlled through a lever arm attached to an electric motor located outside the compressor housing. The automatic adjustment of the vane position in effect provides the performance of many different compressors to match various load conditions from full load with vanes wide open to minimum load with vanes completely closed.

COMPRESSOR

PREROTATION VANES

(See Detail A)

DISCHARGE

SUCTION

DISCHARGE

BAFFLE

COOLER

CON-

ELIMINATOR

SUB-COOL-

FLOW CON-

TROL

LD00924

FIG. 2 – REFRIGERANT FLOW-THRU CHILLER

OIL COOLER

8

YORK INTERNATIONAL

FORM 160.55-O1 (604)

SECTION 2

OPTIVIEW CONTROL CENTER

INTRODUCTION

The YORK OptiView Control Center is a microprocessor based control system for R-11 or R123 centrifugal chillers. It controls the leaving chilled liquid temperature via pre-rotation vane controls and has the ability to limit motor current via control of the pre-rotation vanes. It is compatible with YORK Solid State Starter (optional), Variable Speed Drive (optional) and Electro-Mechanical starter applications.

The panel comes conÞgured with a full screen LCD Graphic Display mounted in the middle of a keypad interface. The graphic display 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. For the novice user, the locations of various chiller parameters are clearly and intuitively marked. Instructions for speciÞc operations are provided on many of the screens.

The graphic display also allows information to be represented in both English (temperatures in °F and pressures in PSIA) and Metric (temperatures in °C and pressures in kPa) mode. The advantages are most apparent, however, in the ability to display many languages.

The Control Center continually monitors the system operation and records the cause of any shutdowns (Safety, Cycling or Normal). This information is recorded in memory and is preserved even through a power failure condition. The user may recall it for viewing at any time. During operation, the user is continually advised of the operating conditions by various status and warning messages. In addition, it may be conÞgured to notify the user of certain conditions via alarms. A complete listing of shutdown, status and warning messages is attached in the Display Messages section of this book.

There are certain screens, displayed values, programmable Setpoints and manual control shown in this book that are for Service Technician use only. They are only displayed when logged in at SERVICE access level or higher. The Setpoints and parameters displayed on these screens are explained in detail in YORK Service Manual 160.55-M1. These parameters affect chiller operation and should NEVER be modified by anyone other than a qualified Service Technician. They are shown in this book for reference only.

Advanced Diagnostics and troubleshooting information for Service Technicians are included in YORK Service Manual 160.55-M1. Also included in the Service manual are detailed descriptions of chiller features, such as

the Refrigerant Level Control (Future), Purge system, 2 Hot Gas Bypass, Remote Setpoints and Smart Freeze Protection.

The control center expands the capabilities of remote control and communications. By providing a common networking protocol through the ISN GPIC YORK Chillers not only work well individually, but also as a team. This new protocol allows increased remote control of the chiller, as well as 24-hour performance monitoring via a remote site. In addition, compatibility is maintained with the present network of ISN communications. The chiller also maintains the standard digital remote capabilities as well. Both of these remote control capabilities allow for the standard Energy Management System (EMS) interface:

1.Remote Start

2.Remote Stop

3.Remote Leaving Chilled Liquid Temperature Setpoint adjustment (0-20mA or 4-20mA, 0-10VDC or 2-10VDC) or Pulse Width Modulation

4.Remote Current Limit Setpoint adjustment (0-20mA or 4-20mA, 0-10VDC or 2-10VDC) or Pulse Width Modulation

5.Remote “Ready to Start” Contacts

6.Safety Shutdown Contacts

7.Cycling Shutdown Contacts

The chiller operating program resides in the Optiview control center Microboard. The control center could be equipped with either of the following Microboards:

031-01730-000 – shipped in new production chillers until September 2003. The program resides in a replaceable Flash Memory Card. The software version (C.MLM.02.xx.yzz) is printed on label adhered to card. Program can be upgraded by replacing the card.

031-02430-000 – shipped in new production chillers after September 2003. The program resides in non-removable onboard memory. The software

YORK INTERNATIONAL

9

Description of System and Fundamentals of Operation

FORM 160.55-O1 (604)

version is C.OPT.02.xx.yzz, and is viewable on the DIAGNOSTICS Screen in SERVICE access level. The program can be upgraded by downloading a new program from a Program Card. Program Cards are shirt-pocket-size portable memory storage devices available from YORK.

Earlier vintage chillers could be equipped with a later Microboard due to service replacement.

Software versions (C.MLM.02.xx.yzz or C.OPT.02.xx.yzz) are alpha-numeric codes that represent the application, language package and revision levels per below. Each time the controls portion or language section is revised, the respective revision level increments.

C – Commercial chiller

MLM – Used on Microboard 031-01730- 000

OPT - Used on Microboard 031-02430- 000

02 – YT chiller

xx - controls revision level (00, 01, etc)

y – language package (0=English only, 1=NEMA, 2=CE, 3=NEMA/CE )

zz – language package revision level (00, 01, etc)

Throughout this book, reference is made to functions and features that are only available in certain Flash Memory Card revision levels (C.MLM.02.xx.xxx). To cross reference C.MLM software to C.OPT software, refer to the controls revision level. Software version C.OPT.02.04B.xxx is of the same controls revision level as C.MLM.02.04.xxx. From this starting point, both receive the same updates at each revision. Software upgrades should only be performed by a Service Technician.

10

YORK INTERNATIONAL

FORM 160.55-O1 (604)

THIS PAGE INTENTIONALLY LEFT BLANK

TO MAINTAIN FORMAT

YORK INTERNATIONAL

11

OptiView Control Center

FORM 160.55-O1 (604)

CONTROL CENTER

FIG. 3

The OptiView Control Center display is highlighted by a full screen graphics display. This display is nested within a standard keypad and is surrounded by “soft” keys which are redeÞned based on the currently displayed screen. Eight buttons are available on the right side of the panel and are primarily used for navigation between the system screens.At the base of the display are 5 additional buttons. The area to the right of the keypad is used for data entry with a standard numeric keypad provided for entry of system setpoints and limits.

The Decimal key provides accurate entry of setpoint values.

A +/- key has also been provided to allow entry of negative values and AM/PM selection during time entry.

In order to accept changes made to the chiller setpoints, the Check key is provided as a universal ‘Enter’ key or ‘Accept’’ symbol.

In order to reject entry of a setpoint or dismiss an entry form, the ‘X’ key is provided as a universal ‘Cancel’ symbol.

Cursor Arrow keys are provided to allow movement on screens which contain a large amount of entry data. In addition, these keys can be used to scroll through history and event logs.

The Start/Stop control is operated via a three-position rocker switch. When toggled all the way to the right, it is considered in the STOP/RESET position. When in the

00134VIP

middle position, this is considered the RUN state. When toggled to the left-most position, it is considered in the START state. Each state is described in detail below:

STOP / RESET (O)

When in this position, the chiller will not run under any condition. For safety reasons, this position is required for many maintenance tasks to be completed (such as proximity probe and vane calibration). In addition, the switch must be placed in this state following a Safety shutdown before the chiller is allowed to restart. This guarantees that manual intervention has taken place and the shutdown has been acknowledged.

START (◄)

The switch can only remain in this position when being acted upon by a manual force. Once the user has released the switch, it automatically reverts to the RUN position. Generally, this state only occurs momentarily as the operator attempts to locally start the unit. Once this position has been sensed, if all fault conditions are cleared, the unit will enter the system prelube (start sequence).

RUN ( )

When in this position, the chiller is able to operate. The switch spring-returns to this state after it has been toggled to the START position. When in this state, the chiller is allowed to function normally and will also allow the chiller to automatically restart following a Cycling shutdown. The switch must be in this state to receive a valid remote start signal when operating under a remote control source.

12

YORK INTERNATIONAL

FORM 160.55-O1 (604)

INTERFACE CONVENTIONS

OVERVIEW

The new graphical display on each control panel allows a wide variety of information to be presented to the user. Each screen description in this document will begin with a section entitled Overview which will describe the graphical elements on the screen and give a short summary of the functions available. Each element on the screen will then be categorized into three distinct groups: Display Only, Programmable and Navigation. Below is a short description of what types of information are included in these groups.

The Programmable values and Navigation commands are also subject to access level restrictions as described below. For each of these elements, an indication is given to show the minimum access level required to program the value or navigate to the subscreen.

DISPLAY ONLY

Values in this group are read-only parameters of information about the chiller operation. This type of information may be represented by a numerical value, a text string or an LED image. For numerical values, if the monitored parameter is above the normal operating range, the high limit value will be displayed along with the ‘>’symbol; if it is below the normal operating range, the low limit value will be displayed along with the ‘<’ symbol. In some cases, the value may be rendered invalid by other conditions and the display will use X’s to indicate this.

PROGRAMMABLE

Values in this group are available for change by the user. In order to program any setpoints on the system, the user must Þrst be logged in with the appropriate access level. Each of the programmable values requires a speciÞcAccess Level which will be indicated beside the speciÞed value. All of the programmable controls in the system fall into one of the categories described below:

Access Level

In order to program any setpoints on the system, the user must Þrst login with an appropriate access level. When power is applied to the chiller, the system begins with an Access Level of VIEW. This will allow the user to navi-

gate to most screens and observe the values displayed there. However, the user will not be allowed to change any values. To change any values, the user must return to the Home Screen (shown by default when power is applied to the system) and use the LOGIN button or utilize the CHANGE SETPOINTS key described below. At this point, the user will be prompted to enter a User ID

and the corresponding Password. By default, the User 2 ID is zero (0). In order to gain standard OPERATOR

level access, the Password would be entered as 9 6 7 5, using the numeric keypad. OPERATOR access reverts to the VIEW level after 10 continuous minutes without a keypress. If a custom User ID and Password have been deÞned (see User Screen), the user may enter that User ID and the corresponding Password value.

If the correct password is received, the user is authorized with the appropriate Access Level. If an incorrect password is entered, the user is notiÞed of the failure and prompted again. At this point the user may retry the password entry or cancel the login attempt.

Change Setpoints

On screens containing setpoints programmable at the OPERATOR access level, a key with this label will be visible if the present access level is VIEW. This key brings up the Access Level prompt described above. It allows the user to login at a higher Access Level without returning to the Home Screen. After login, the user may then modify setpoints on that screen.

Setpoints

The control center uses the setpoint values to control the chiller and other devices connected to the chiller system. Setpoints can fall into several categories. They could be numeric values (such as 45.0°F for the Leaving Chilled Liquid Temperature) or they could Enable or Disable a feature or function.

Regardless of which setpoint is being programmed, the following procedure applies:

1.Press the desired setpoint key. A dialog box appears displaying the present value, the upper and lower limits of the programmable range and the default value.

2.If the dialog box begins with the word “ENTER”, use the numeric keys to enter the desired value.

YORK INTERNATIONAL

13

OptiView Control Center

Leading zeroes are not necessary. If a decimal point is necessary, press the ‘•’ key (i.e. 45.0).

Pressing the ▲key, sets the entry value to the default for that setpoint. Pressing the ▼key, clears the present entry. The ◄ key is a backspace key and causes the entry point to move back one space.

If the dialog box begins with “SELECT”, use the ◄ and ► keys to select the desired value.

If the previously deÞned setpoint is desired, press the ‘X’ (Cancel) key to dismiss the dialog box.

3.Press the ‘!’ (Enter) key.

If the value is within range, it is accepted and the dialog box disappears. The chiller will begin to operate based on the new programmed value. If out of range, the value will not be accepted and the user is prompted to try again.

Manual Controls

Some keys are used to perform manual control functions. These may involve manual control of items such as the pre-rotation vanes, variable oriÞce (future) or hot gas bypass valve. Other keys in this category are used to initiate/terminate processes such as calibrations or reports.

Free Cursor

On screens containing many setpoints, a speciÞc “soft” key may not be assigned to each setpoint value. A soft key will be assigned to enable the cursor arrow keys below the numeric keypad which are used to “highlight” the desired setpoint Þeld. At this point, the ‘!’ key is pressed to bring up a dialog prompting the user to enter a new setpoint value. The ‘X’ key cancels cursor mode. (See the Schedule Screen [Fig. 24] for an example.)

NAVIGATION

In order to maximize the amount of values which the panel can display to the user and in order to place those values in context, multiple screens have been designed to describe the chiller operation. In order to move from one screen to the next, navigation keys have been deÞned. These keys allow the user to either move “forward” to a subscreen of the present screen or move “backward” to the previous screen. Except for the Home Screen display, the upper-right “soft” key will always return the user to the Home Screen. Navigating with “soft” keys is as simple as pressing the key next to the label containing the name of the desired screen. The system will immediately refresh the display with the graphics for that screen. Following is a layout of all the screens and how they are connected.

FORM 160.55-O1 (604)

Home Screen (page 14)

System Screen (page 16)

Evaporator (page 18)

Condenser (page 20)

Purge (page 22)

Refrig. Level Control (page 24)

Compressor (page 26)

Hot Gas Bypass (page 28)

Surge Protection Screen (page 30)

Vane Calibration (page 32)

VSD Tuning (page 34)

Oil Sump (page 36)

Motor (page 37)

EM Starter Version (page 37)

Mod “A” Solid State Starter (page 38)

Mod “B” Solid State Starter (page 40)

VSD Version (page 42)

VSD Details (page 44)

ACC Details (page 48)

Harmonic Filter Details (page 50)

Setpoints (page 54)

Setup (page 56)

Schedule (page 58)

User (page 60)

Comms (page 62)

Printer (page 64)

Sales Order (page 66)

Operations (page 68)

Diagnostics (Refer to YORK

Service Manual 160.55-M1)

History (page 70)

History Details (page 72)

Security Log (page 73)

Security Log Details (page 74)

Trend (page 76)

Trend Setup (page 78)

Advanced Trend Setup (page 80)

Common Slots (page 82)

Custom View (page 83)

Custom Setup (page 84)

14

YORK INTERNATIONAL

LANGUAGES

The Screens can be displayed in various languages. Language selection is done on the USER Screen. The desired language is selected from those available. Not all languages

FORM 160.55-O1 (604)

are available. English is the default language. If a language otherthanEnglish is being displayed,anEnglish-onlyspeak- ing person should navigate to the USER Screen using the preceding Navigation chart and select English per the USER Screen instructions in this book.

ANALOG INPUT RANGES

 

2

 

The following table indicates the valid display range for each of the analog input values. In the event that the input sensor is reading a value outside of these ranges, the < or > symbols will be displayed beside the minimum or maximum value, respectively.

ANALOG INPUT

ENGLISH RANGE

 

METRIC RANGE

LOW

HIGH

UNITS

LOW

 

HIGH

UNITS

 

 

Leaving Chilled Liquid Temperature

0.0

82.0

°F

-17.7

 

27.7

°C

Return Chilled Liquid Temperature

0.0

94.1

°F

-17.7

 

34.5

°C

Leaving Condenser Liquid Temperature

8.0

133.5

°F

-13.3

 

56.3

°C

Return Condenser Liquid Temperature

8.0

133.5

°F

-13.3

 

56.3

°C

Evaporator Refrigerant Temperature

0.0

126.1

°F

-17.7

 

52.3

°C

Discharge Temperature

19.0

226.3

°F

-7.2

 

107.9

°C

Oil Temperature

19.0

226.3

°F

-7.2

 

107.9

°C

Condenser Pressure

2.5

35.3

PSIA

17.2

 

243.4

KPAA

Condenser Temperature (R11)*

-1.4

124.2

°F

-18.5

 

51.2

°C

Condenser Temperature (R123)*

7.2

130.1

°F

-13.7

 

54.5

°C

Evaporator Pressure

0.0

12.5

PSIA

6.9

 

86.2

KPAA

Evaporator Temperature (R11)*

-31.2

66.8

°F

-35.7

 

19.3

°C

Evaporator Temperature (R123)*

-22.4

74.2

°F

-30.2

 

23.4

°C

Oil Sump Pressure

2.9

20.9

PSIA

20.0

 

144.1

KPAA

Oil Pump Pressure

14.3

78.2

PSIA

98.6

 

539.2

KPAA

Purge Pressure

0.0

100.0

PSIA

6.9

 

689.5

KPAA

Refrigerant Level (Future)

0.0

100.0

%

0.0

 

100.0

%

Drop Leg Refrigerant Temperature

0.0

121.8

°F

-17.7

 

49.8

°C

*Saturation temperatures are calculated values. They will display XXX if the pressure used for the calculation is out of range.

YORK INTERNATIONAL

15

OptiView Control Center

FORM 160.55-O1 (604)

HOME SCREEN

FIG. 4

OVERVIEW

When the chiller system is powered on, the above default display appears. The primary values which must be monitored and controlled are shown on this screen. The Home Screen display depicts a visual representation of the chiller itself. Animation indicates chilled liquid ßow.

DISPLAY ONLY

Chilled Liquid Temperature - Leaving

Displays the temperature of the liquid as it leaves the evaporator.

Chilled Liquid Temperature - Return

Displays the temperature of the liquid as it enters the evaporator.

Condenser Liquid Temperature - Leaving

Displays the temperature of the liquid as it leaves the condenser.

Condenser Liquid Temperature - Return

Displays the temperature of the liquid as it enters the condenser.

Motor Run (LED)

Is ON when the digital output controlling the Motor Starter contact is on.

00347VIP

Input Power (kW)

Available only if the chiller system is utilizing a Variable Speed Drive motor controller or Mod “B” Solid State Starter. This displays the total input power used by the system.

% Full Load Amps

This displays the percentage of full load amps utilized by the system.

Operating Hours

Displays the cumulative operating hours of the chiller.

PROGRAMMABLE

Login

Access Level Required: VIEW

The Control Center restricts certain operations based on password entry by the operator. Three different access levels are provided as follows: VIEW: The panel defaults to the lowest access level which is termed VIEW. In this mode, the chiller operating values and setpoints can be observed, but no changes can be made. OPERATOR: The second access level is termed OPERATOR and will allow the customer to change all of the setpoints required to operate the chiller system. The OPERATOR access level reverts to the VIEW level after 10 continuous minutes without a keypress. SERVICE: In the event that advanced diagnostics are necessary, a SERVICE access level has been provided.

16

YORK INTERNATIONAL

Only qualiÞed service personnel utilize this access level. This level provides advanced control over many of the chiller functions and allows calibration of many of the chiller controls. The access levels are listed above in hierarchical order beginning with the lowest level and proceeding to the highest level. Users logged in under higher access levels may perform any actions permitted by lower access levels.

The OPERATOR access level is accompanied by a 10-minute timeout. After ten (10) successive minutes without a keypress, the panel will revert to the VIEW access level. This prevents unauthorized changes to the chiller if a user was logged in at a higher access level and failed to logout. Proper procedure requires that after making necessary setpoint adjustments the user return to the Home Screen and logout.

Logout

Access Level Required: OPERATOR

This key is displayed when a user is logged in at any level other than VIEW. Pressing it will return the access level to VIEW.

Print

Access Level Required: VIEW

Use this key to generate a hard-copy report of the present system status. This provides a snapshot of the primary operating conditions at the time the key is pressed. The History page provides enhanced reporting capability. (See HISTORY below.) This option will not be present if the chiller is presently conÞgured to log any incoming Adaptive Capacity Control map points. (See the Adaptive Capacity Control Details screen.)

Message Clear

Access Level Required: SERVICE

When certain safety or cycling conditions have been detected and the chiller has been shutdown, the main status display of the chiller will continue to display a message indicating the cause of the shutdown. Using this key, the message can be cleared once the condition has been removed.

Warning Reset

Access Level Required: OPERATOR

Use of this key acknowledges a warning condition and resets the message display associated with it.

FORM 160.55-O1 (604)

 

NAVIGATION

 

System

 

Used to provide additional system information.

 

Evaporator

 

A detailed view of all evaporator parameters, including

 

the programmable Leaving Chilled Liquid Setpoints.

 

Condenser

 

2

A detailed view of all condenser parameters, including

control of the purge functions.

Compressor

A detailed view of all the compressor parameters. This includes pre-rotation vane control, Hot Gas Bypass Control and PRV calibration.

Oil Sump

A detailed view of all the oil pump and oil sump parameters.

Motor

A detailed view of the motor controller parameters, speciÞc to the controller type presently utilized on the chiller system. This allows programming of the Current Limit and the Pulldown Demand Limit values. For a VSD system, the Adaptive Capacity Control and Harmonic Filter information is controlled under this screen.

Setpoints

This screen provides a single location to program the most common system setpoints. It is also the gateway to many of the general system setup parameters such as Date/Time, Display Units, Scheduling, Printer Setup, etc.

History

This screen provides access to a snapshot of system data at each of the last 10 shutdown conditions.

YORK INTERNATIONAL

17

OptiView Control Center

FORM 160.55-O1 (604)

SYSTEM SCREEN

FIG. 5

00348VIP

 

OVERVIEW

This screen gives a general overview of common chiller parameters for both shells.

DISPLAY ONLY

Discharge Temperature

Displays the temperature of the refrigerant in its gaseous state at discharge of the compressor as it travels to the condenser.

Chilled Liquid Temperature - Leaving

Displays the temperature of the liquid as it leaves the evaporator.

Chilled Liquid Temperature - Return

Displays the temperature of the liquid as it enters the evaporator.

Chilled Liquid Temperature - Setpoint

Displays the active temperature setpoint to which the chiller is controlling the evaporator liquid. This value could come from a 0-20mA or 4-20mA, 0-10VDC or 2- 10VDC input in Analog Remote mode, PWM signal in Digital Remote mode, MicroGateway interface in ISN mode or a locally programmed value in local mode.

Evaporator Pressure

Displays the present refrigerant pressure in the evaporator.

Evaporator Saturation Temperature

Displays the present saturation temperature in the evaporator.

Condenser Liquid Temperature - Leaving

Displays the temperature of the liquid as it leaves the condenser.

Condenser Liquid Temperature - Return

Displays the temperature of the liquid as it enters the condenser.

Condenser Pressure

Displays the refrigerant pressure in the condenser.

Condenser Saturation Temperature

Displays the saturation temperature in the condenser.

Oil Sump Temperature

Displays the temperature of the oil in the sump.

Oil Pressure

Displays the pressure differential between the pump oil pressure transducer and the sump oil pressure transducer. If either of the transducers used to calculate this differential is out of range, the display Þeld will show XX.X.

% Full Load Amps

This displays the percentage of full load amps utilized by the system.

18

YORK INTERNATIONAL

 

FORM 160.55-O1 (604)

Current Limit

NAVIGATION

Displays the current limit value in use. This value could

 

 

come from a 0-20mAor 4-20mA, 0-10VDC or 2-10VDC

Home

input in Analog Remote mode, PWM signal in Digital

Access Level Required: VIEW

Remote mode, MicroGateway interface in ISN mode or

Causes an instant return to the Home Screen.

a locally programmed value.

 

 

PROGRAMMABLE

 

 

 

 

 

None

 

2

 

 

 

 

 

YORK INTERNATIONAL

19

OptiView Control Center

FORM 160.55-O1 (604)

EVAPORATOR SCREEN

FIG. 6

OVERVIEW

This 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 a RUN condition. Animation of the liquid ßow indicates chilled liquid ßow.

DISPLAY ONLY

Chilled Liquid Flow Switch (Open / Closed)

Displays whether the liquid ßow is present in the evaporator.

Chilled Liquid Pump

Displays the command presently sent by the control center to the Chilled Liquid Pump (RUN or STOP).

Evaporator Pressure

Displays the present refrigerant pressure in the evaporator.

Evaporator Saturation Temperature

Displays the present saturation temperature in the evaporator.

Return Chilled Liquid Temperature

Displays the temperature of the liquid as it enters the evaporator.

Leaving Chilled Liquid Temperature

Displays the temperature of the liquid as it leaves the evaporator.

00349VIP

Evaporator Refrigerant Temperature

Displays the temperature of the refrigerant in the evaporator, if the sensor is present.

Small Temperature Difference

Displays the difference between the Leaving Chilled Liquid temperature and the Evaporator Refrigerant temperature. The Evaporator Refrigerant temperature will be represented by the Refrigerant Temperature sensor input if the sensor is present, otherwise it will be represented by the Evaporator Saturation temperature.

Leaving Chilled Liquid Temperature Setpoints – Setpoint

Displays the present setpoint to which the chiller is operating, whether controlled locally or remotely.

Leaving Chilled Liquid Temperature Setpoints

– Shutdown

Displays the Leaving Chilled Liquid Temperature at which the chiller will shut down to avoid over-cooling the building. By default this value is 4°F below the Leaving Chilled Setpoint.

Leaving Chilled Liquid Temperature Setpoints

– Restart

Displays the Leaving Chilled Liquid Temperature at which the chiller will restart after it has shut down due to over-cooling temperature. By default, the chiller will restart at the Leaving Chilled Liquid Temperature Setpoint.

20

YORK INTERNATIONAL

PROGRAMMABLE

Local Leaving Chilled Liquid Temperature - Range Access Level Required: OPERATOR

This is the range over which an analog (0-20mA or 4- 20mA, 0-10VDC or 2-10VDC) in Analog Remote Mode or a digital signal (PWM) in Digital remote mode can reset the Leaving Chilled Liquid Temperature setpoint above the operator programmed Base Setpoint (see below). Programmable as either 10°F or 20°F, with a default of 20°F, it is added to the Base value to create a range over which the remote device can reset the setpoint. For example, if this setpoint is programmed for 10°F and the operator programmed value is 45°F, then the remote device can set the Leaving Chilled Liquid Temperature setpoint over the range 45.0° - 55.0°F.

Local Leaving Chilled Liquid Temperature - Setpoint

Access Level Required: OPERATOR

This value allows the user to deÞne the Leaving Chilled Liquid Temperature that is to be maintained by the chiller. It is programmable over the range of 38.0°F to 70.0°F (water) or 10.0°F to 70.0°F (brine). If Smart Freeze (see below) is enabled, the range is 36.0°F to 70.0°F (water). A remote device can provide an analog signal (0-20mA or 4-20mA, 0-10VDC or 2-10VDC) in Analog Remote mode or PWM signal in Digital Remote mode that changes the setpoint by creating an offset above the operator programmed Base Leaving Chilled Liquid Temperature setpoint. This offset may be deÞned up to 10.0°F or 20.0°F above the Base setpoint (see the Remote Leaving Chilled Liquid Temperature Setpoint Range description above). Additionally, a MicroGateway (in ISN Remote mode) can deÞne the setpoint through a serial data stream. In this case, the incoming setpoint is not an offset that is applied to the locally programmed Base setpoint value, but rather is the setpoint value itself.

Leaving Chilled Liquid Temperature Cycling Offset - Shutdown

Access Level Required: OPERATOR

This value allows the user to specify the Leaving Chilled Liquid Temperature at which the chiller will shut down on a LEAVING CHILLED LIQUID – LOW TEMPERATURE cycling shutdown. This is done by deÞning an offset below the Leaving Chilled Liquid Temperature setpoint. It is programmable over a range of 1°F to 64°F below the setpoint, to a minimum cutout of 36°F (water), 34°F (water with Smart Freeze enabled) or 6°F (brine). It establishes the minimum allowable temperature for the Leaving Chilled Liquid Temperature and prevents overcooling of the building. Anytime the Leaving Chilled Liquid Temperature setpoint is increased, the shutdown

FORM 160.55-O1 (604)

threshold is 36.0°F (water) or 6.0°F (brine) for the next ten (10) minutes. If Smart Freeze (see below) is enabled, the threshold is 34.0°F for the next 10 minutes. After ten (10) minutes have elapsed, the shutdown threshold becomes the programmed setpoint value.

Leaving Chilled Liquid Temperature Cycling Offset - Restart

Access Level Required: OPERATOR

This value allows the user to specify the Leaving Chilled Liquid Temperature at which the chiller will restart 2 after a shutdown on a LEAVING CHILLED LIQUID

– LOW TEMPERATURE cycling shutdown. This is done by deÞning an offset above the Leaving Chilled Liquid Temperature setpoint. It is programmable over a range of 0°F to 70°F above the setpoint, to a maximum restart value of 80°F. The chiller will automatically restart when this temperature is reached. This setpoint can be used to reduce chiller cycling by delaying the chiller restart until the cooling load has increased.

Brine Low Evaporator Cutout

Access Level Required: SERVICE

This value is only available in Brine mode. It allows the user to specify the Evaporator Pressure at which a safety shutdown is initiated. Service Technicians refer to YORK Service Manual 160.55-M1.

Sensitivity

Access Level Required: SERVICE

This value allows the user to adjust the sensitivity of the Leaving Chilled Liquid Temperature control. Service Technicians refer to YORK Service Manual 160.55M1.

Smart Freeze (Off / On)

Access Level Required: SERVICE

This value is only available if the chiller is not in Brine mode. It allows the user to enable the Smart Freeze Point Operation which allows the chiller to run closer to the freeze point without shutting down. Service Technicians refer to YORK Service Manual 160.55-M1.

Refrigerant (Enabled / Disabled)

Access Level Required: SERVICE

When an Evaporator Refrigerant Sensor has been installed it must be enabled via this toggle before the system will utilize the new, enhanced resolution input. Service Technicians refer to YORK Service Manual 160.55-M1.

NAVIGATION

Home

Access Level Required: VIEW

Causes an instant return to the Home Screen.

YORK INTERNATIONAL

21

OptiView Control Center

FORM 160.55-O1 (604)

CONDENSER SCREEN

FIG. 7

OVERVIEW

This screen displays a cutaway view of the chiller condenser. All setpoints relating to the condenser side of the chiller are maintained on this screen. Animation indicates condenser liquid ßow. This screen also serves as a gateway to controlling the Refrigerant Level.

DISPLAY ONLY

Leaving Condenser Liquid Temperature

Displays the water temperature as it leaves the condenser.

Return Condenser Liquid Temperature

Displays the water temperature as it enters the condenser.

Condenser Pressure

Displays the refrigerant pressure in the condenser.

Condenser Saturation Temperature

Displays the saturation temperature in the condenser.

Small Temperature Difference

Displays the difference between the Condenser Refrigerant temperature and the Leaving Condenser Liquid temperature. The Condenser Refrigerant temperature will be represented by the Condenser Saturation temperature.

00350VIP0

Drop Leg Refrigerant Temperature

Displays the temperature of the refrigerant in the drop leg between the condenser and evaporator shells, if the sensor is present.

Sub-Cooling Temperature

Displays the difference between the Condenser Refrigerant temperature and the Drop Leg Refrigerant temperature. The Condenser Refrigerant temperature will be represented by the Condenser Saturation temperature. If the Drop Leg sensor is not present, this temperature is not displayed.

High Pressure Switch (Open / Closed)

Displays the present position of the high pressure switch. This will indicate whether a High Pressure fault is present.

Condenser Liquid Flow Switch

Indicates whether ßow is present in the condenser.

Condenser Liquid Pump (Run / Stop)

Indicates whether Condenser liquid pump is operating.

Refrigerant Level Position

Displays the present position of the refrigerant level if this function is enabled.

22

YORK INTERNATIONAL

Refrigerant Level Setpoint

Displays the setpoint to which the refrigerant level is being controlled.

Ramp Up Time Remaining

Displays the time remaining in the period in which the Refrigerant Level Setpoint is being ramped to the Refrigerant Level Target Setpoint. This only displayed if the Refrigerant Ramp is in effect and the value is non-zero. Service Technicians refer to YORK Service Manual 160.55-M1.

PROGRAMMABLE

High Pressure Warning Threshold

Access Level Required: SERVICE

This value allows the user to deÞne the condenser pressure at which the chiller will initiate a warning.

Drop Leg (Enabled / Disabled)

Access Level Required: SERVICE

When a Drop Leg Refrigerant Sensor has been installed

FORM 160.55-O1 (604)

it must be enabled via this toggle before the system will utilize the new, enhanced resolution input. Service Technicians refer to YORK Service Manual 160.55-M1.

NAVIGATION

Home

Access Level Required: VIEW

Causes an instant return to the Home Screen.

2

Purge

Access Level Required: VIEW

Moves to the subscreen allowing programming of the Purge System Setpoints.

Refrigerant Level Control

Access Level Required: SERVICE

Moves to the sub-screen allowing programming of the Refrigerant Level control setpoints.

YORK INTERNATIONAL

23

OptiView Control Center

FORM 160.55-O1 (604)

PURGE SCREEN

FIG. 8

00351VIP

 

OVERVIEW

This screen displays a cutaway view of the Purge Tank. LED’s depict the state of the Float switches, Oil Valve solenoid and Air Valve solenoid and the purge exhaust count is displayed. All setpoints relating to the purge system are maintained on this screen. The Purge tank oil level, based on the position of the ßoat switches, is depicted through animation. When both the Float Switches are closed, the oil level is shown at its lowest (empty) level. When both Float switches are open, the level is shown at its highest (full) level. Levels between these extremes are shown at midpoint.

DISPLAY ONLY

Air Valve Solenoid (LED)

Illuminated when the Air Valve Solenoid is energized (open), venting non-condensibles from the Purge tank. Otherwise, extinguished. For High EfÞciency (pump assisted) purge systems, the valve is energized at >90.0 PSIA and de-energizes when the pressure decreases to <80.0 PSIA. For non-assisted purge systems, the valve is energized at >34.7 PSIA and de-energized when the pressure decreases to <29.7 PSIA.

Top Float Switch (LED)

Illuminated when the Top Float Switch is closed, indicating the Purge Tank oil level is less than full.

Extinguished when it is open, indicating the level is at maximum (full).

Bottom Float Switch (LED)

Illuminated when the Bottom Float Switch is closed, indicating the Purge Tank oil level is at minimum (empty). Extinguished when it is open, indicating the oil level is above minimum.

Oil Valve Solenoid (LED)

Illuminated when the Oil Valve Solenoid is energized, Þlling the Purge Tank with oil. Extinguished when it is de-energized, draining the oil from the Purge tank.

Pressure

Displays the pressure in the Purge Tank.

Exhaust Count

Displays the number of purge exhausts that have occurred within the last 0 to 60 minutes, as displayed in the Exhaust Window. After a 60 minute bypass at chiller start, purge exhausts are counted until the Excess Purge threshold is reached or the chiller shuts down, whereupon the count is frozen. The count will be reset when the chiller starts.

Exhaust Window

Displayed as 0 to 60 minutes. After a 60 minute bypass at chiller start, the Exhaust Window increments from 0

24

YORK INTERNATIONAL

to 60. During this period, purge exhausts are counted and the Exhaust Count displayed is that which has occurred in the last number of minutes displayed in the Exhaust Window. After the Exhaust Window reaches 60, the purge exhausts that occurred in the oldest minute are discarded from the Exhaust Count and exhausts from the most recent minute are shifted in, providing a rolling count of purge exhausts that occurred in the last 60 minutes. It remains at 60 until the chiller is restarted, whereupon it is reset to 0.

Bypass Time Left

Replaces “Exhaust Window” label during the Þrst 60 minutes of chiller run. Counts down the 60 minute purge count bypass.

PROGRAMMABLE

High Efficiency Purge System (Enabled/Disabled)

Access Level Required: SERVICE

Selects the appropriate control and purge exhaust thresholds for the installed purge system. High EfÞciency (pump assisted) purge systems exhaust at >90.0

FORM 160.55-O1 (604)

PSIA. Non pump-assisted purge systems exhaust at >34.7 PSIA.

Maximum Purges/Hour

Access Level Required: OPERATOR/SERVICE Allows the user to deÞne the number of purge air exhausts permitted before an Excess Purge Warning is displayed. With OPERATOR access level, the value can be programmed over a range of 10 to 30 Purges/Hour. Ser-

vice Technicians, in SERVICE access level can program 2 this setpoint over a greater range. Service Technicians

refer to YORK Service Manual 160.55-M1.

NAVIGATION

Home

Access Level Required: VIEW

Causes an instant return to the Home Screen.

Condenser

Access Level Required: VIEW

Causes an instant return to the Condenser Screen.

YORK INTERNATIONAL

25

OptiView Control Center

FORM 160.55-O1 (604)

REFRIGERANT LEVEL CONTROL SCREEN

FIG. 9

OVERVIEW

This screen displays a cutaway view of the chiller condenser, along with the liquid refrigerant level sensor and the ßow control valve. All setpoints relating to the liquid level control are maintained on this screen. Through animation, the variable oriÞce position is displayed. In addition, the refrigerant ßow control valve (variable oriÞce) can be manually operated.

Requires a login access level of SERVICE. Service Technicians refer to YORK Service Manual 160.55-M1 for operation instructions and explanation of all programmable setpoints and displayed values.

DISPLAY ONLY

Refrigerant Level Position

Displays the present position of the liquid level. The refrigerant level is animated in the cutaway view of the condenser. When the actual level is 0% to 15%, the level is shown about 50% full. When the actual level is 16% to 31%, the level is shown about 60% full. When the actual level is 32% to 47%, the level is shown about 70% full. When the actual level is 48% to 63%, the level is shown about 80% full. When the actual level is 64% to 79%, the level is shown as about 90% full. Actual levels above 79%, shown as 100% full.

00303VIP

Refrigerant Level Control Mode

Indicates whether the liquid level control is under manual or automatic control.

Raise (LED)

Is ON when the digital output controlling the Level Raise contact is on.

Lower (LED)

Is ON when the digital output controlling the Level Lower contact is on.

PROGRAMMABLE

[Refrigerant Level] Setpoint

Service Technicians refer to YORK Service Manual 160.55-M1.

[Refrigerant Level Control] Period

Service Technicians refer to YORK Service Manual 160.55-M1.

[Refrigerant Level Control] Proportional Limit Open

Service Technicians refer to YORK Service Manual 160.55-M1.

26

YORK INTERNATIONAL

[Refrigerant Level Control] Proportional Limit Close

Service Technicians refer to YORK Service Manual 160.55-M1.

[Refrigerant Level Control] Rate Limit Open

Service Technicians refer to YORK Service Manual 160.55-M1.

[Refrigerant Level Control] Rate Limit Close

Service Technicians refer to YORK Service Manual 160.55-M1.

[Refrigerant Level Control] Raise (Manual)

This key puts the level control into manual mode and sends a RAISE command to the variable oriÞce.

[Refrigerant Level Control] Lower (Manual)

This key puts the level control into manual mode and sends a LOWER command to the variable oriÞce.

FORM 160.55-O1 (604)

 

[Refrigerant Level Control] Hold (Manual)

 

This key puts the level control into manual mode and

 

sends a HOLD command to the variable oriÞce.

 

[Refrigerant Level Control] Auto

 

Returns the Level Control to automatic mode.

 

NAVIGATION

 

Home

 

Access Level Required: VIEW

 

2

Causes an instant return to the Home Screen.

 

 

Condenser

Access Level Required: VIEW

Return to the Condenser Screen.

YORK INTERNATIONAL

27

OptiView Control Center

FORM 160.55-O1 (604)

COMPRESSOR SCREEN

FIG. 10

OVERVIEW

This screen displays a cutaway view of the chiller compressor, revealing the impeller and shows all conditions associated with the compressor. In addition, with the proper Access Level, the pre-rotation vanes may be manually controlled. Animation of the compressor impeller indicates whether the chiller is presently in a RUN condition. This screen also serves as a gateway to subscreens for calibrating the pre-rotation vanes, calibrating the proximity probe, conÞguring the Hot Gas Bypass or providing advanced control of the compressor motor Variable Speed Drive.

DISPLAY ONLY

Oil Pressure

Displays the pressure differential between the high side oil pressure transducer (compressor bearing input) and the low side oil pressure transducer (oil sump). If either of the transducers used to calculate this differential is out of range, the display Þeld will show XX.X.

Oil Sump Temperature

Displays the temperature of the oil in the sump

Discharge Temperature

Displays the temperature of the refrigerant in its gaseous state at discharge of the compressor as it travels to the condenser.

00483VIP

Superheat Temperature

Displays the discharge superheat temperature, calculated as (Discharge temperature – Condenser Saturated temperature).

Vane Motor Switch (LED)

Illuminates when the vanes are completely closed.

Vent Line Solenoid (LED)

Illuminates when the solenoid is energized.

Pre-Rotation Vanes Control Mode

Access Level Required: SERVICE

Indicates whether the vanes are under manual or automatic control.

[Pre-Rotation Vanes] Open (LED)

Access Level Required: SERVICE

Indicates whether the vanes are in the process of opening.

[Pre-Rotation Vanes] Close (LED)

Access Level Required: SERVICE

Indicates whether the vanes are in the process of closing.

Pre-Rotation Vanes Position (Variable Speed Drive only)

Access Level Required: SERVICE

This value displays the present position of the pre-ro- tation vanes as a percentage between 0 and 100%.

28

YORK INTERNATIONAL

Full Load Amps

Access Level Required: SERVICE

Displays the motor current as a percentage of the Full Load Amps (FLA) value.

Phase A, B, C Current (Solid State Starter only)

Access Level Required: SERVICE

Displays the 3-phase motor current values being read from the Solid State Starter.

PROGRAMMABLE

[Pre-Rotation Vanes] Open (Manual)

Access Level Required: SERVICE

This key puts the vane control into manual mode and sends an OPEN command to the vanes.

[Pre-Rotation Vanes] Close (Manual)

Access Level Required: SERVICE

This key puts the vane control into manual mode and sends a CLOSE command to the vanes.

[Pre-Rotation Vanes] Hold (Manual)

Access Level Required: SERVICE

This key puts the vane control into manual mode and sends a HOLD command to the vanes.

[Pre-Rotation Vanes] Auto

Access Level Required: SERVICE

This key returns the vane control to automatic mode.

NAVIGATION

Home

Access Level Required: VIEW

Causes an instant return to the Home Screen.

FORM 160.55-O1 (604)

Pre-Rotation Vane Calibration

Access Level Required: SERVICE

Only available if the chiller is stopped and the system uses a Variable Speed Drive or Hot Gas Bypass control. Moves to the subscreen allowing calibration of the Pre-rotation vanes. Service Technicians refer to YORK Service Manual 160.55-M1.

VSD TUNING (Variable Speed Drive only)

2

Access Level Required: SERVICE

Moves to the subscreen allowing advanced tuning of the Variable Speed Drive. Service Technicians refer to YORK Service Manual 160.55-M1.

Hot Gas

Access Level Required: SERVICE

Moves to the subscreen that allows programming of the Hot Gas Bypass control setpoints and manual control of the Hot Gas Bypass valve. Only displayed if Hot gas Bypass feature has been enabled on the OPERATIONS Screen. Service technicians refer to YORK Service Manual 160.55-M1.

Surge

(Flash memory Card version C.MLM.02.02.xxx and later)

Access Level Required: VIEW

Moves to the sub-screen that allows viewing and programming of the Surge Protection feature. Service Technicians refer to Service Manual 160.55-M1.

YORK INTERNATIONAL

29

OptiView Control Center

FORM 160.55-O1 (604)

HOT GAS BYPASS SCREEN

FIG. 11

00476VIP

 

OVERVIEW

This screen displays a cutaway view of the Hot Gas Bypass Valve. All setpoints relating to Hot Gas Bypass control are maintained on this screen. Also, related Hot Gas Bypass control parameters are displayed for reference. Through animation, the relative valve position is displayed. In addition, the valve can be manually operated.

Requires access level of SERVICE. Service Technicians refer to YORK Service Manual 160.55-M1 for operation instructions and explanation of all programmable setpoints and displayed values.

DISPLAY ONLY

Valve Position

Displays the position of the Hot Gas valve over the range of 0% (closed) to 100% (fully open). The valve position is animated. When the actual position is 0% to 19%, the valve is shown fully closed. When actual position is 20% to 39% the valve is shown 25% open. When actual position is 40% to 59%, the valve is shown 50% open. When actual position is 60% to 79%, the valve is shown as 75% open. Positions greater than 79% shown as full open.

Pre-rotation Vanes Position

Displays the position of the Pre-Rotation Vanes over the range of 0% (closed) to 100% (fully open). Displayed at XXX until calibration procedure is performed by service technician.

Delta P/P

A parameter that represents system differential or “Head”. It is calculated as [(condenser pressure – evaporator pressure) / evaporator pressure].

Temperature Differential

The difference between the Leaving Chilled Liquid Temperature and the Leaving Chilled Liquid Temperature Setpoint. It is calculated by subtracting the Leaving Chilled Liquid temperature from the Leaving Chilled Liquid Temperature Setpoint.

Total Surge Count

This is the total number of surge events that have been detected over the lifetime of the chiller. These are the surge events detected by the Surge Protection feature. The surge events detected by the compressor Variable Speed Drive Adaptive Capacity Control Board are not included in this total.

Surge Detected (LED)

Illuminated for 5 seconds each time a surge is detected by the Surge Protection feature. It does not illuminate

30

YORK INTERNATIONAL

Loading...
+ 126 hidden pages