York R123, YT User Manual
MILLENNIUM
®
CENTRIFUGAL LIQUID CHILLERS
OPERATING & MAINTENANCE
WITH OPTIVIEW
FOR ELECTRO-MECHANICAL STARTER,
SOLID STATE STARTER & VARIABLE SPEED DRIVE
Supersedes: 160.55-O1 (402)
MODEL YT (STYLE J)
R123 COOLING ONLY
™
CONTROL CENTER
Form 160.55-O1 (604)
29509A
FORM 160.55-O1 (604)
2
YORK INTERNATIONAL
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
FORM 160.55-O1 (604)
This equipment is a relatively complicated apparatus.
During installation, operation, maintenance or service,
in di vid u als 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
po ten tial, if misused or handled improperly, to cause
bodi ly injury or death. It is the obligation and re spon si bil i ty of operating/service per son nel to identify and
rec og nize these inherent hazards, protect themselves
and pro ceed safely in completing their tasks. Failure
to com ply with any of these requirements could result
in se ri ous dam age to the equipment and the property in
which it is sit u at ed, as well as severe personal injury or
death to them selves and people at the site.
This document is intended for use by owner-authorized
operating/service personnel. It is expected that this in di vid u al possesses independent training that will en able
them to perform their assigned tasks properly and safe ly.
It is essential that, prior to performing any task on this
equipment, this individual shall have read and un der stood this document and any referenced materials. This
in di vid u al shall also be familiar with and comply with
all ap pli ca ble governmental standards and regulations
per tain ing 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 im mi nent ly
hazardous situation which, if not
avoid ed, will re sult in death or se ri ous
injury.
CAUTION identifi es a hazard which
could lead to damage to the ma chine,
damage to other equip ment and/or
en vi ron men tal pollution. Usually an
in struc tion will be given, together with
a brief ex pla na tion.
WARNING indicates a potentially
haz ard ous sit u a tion which, if not
avoid ed, could result in death or se ri ous in ju ry.
External wiring, unless specifi ed as an optional connection in the man u fac tur er’s prod uct
line, is NOT to be connected inside the micro pan el cab i net. De vic es such as re lays, switch es,
transducers and controls may NOT be installed inside the mi cro pan el. NO external wiring
is al lowed to be run through the micro panel. All wir ing must be in ac cor dance with YORK’ s
pub lished spec i fi ca tions and must be per formed ONLY by qual i fi ed YORK personnel. YORK
will not be re spon si ble for dam ag es/problems re sult ing from im prop er con nec tions to the
con trols or ap pli ca tion of im prop er con trol sig nals. Failure to fol low this will void the
man u fac tur er’s warranty and cause serious dam age to property or injury to per sons.
YORK INTERNATIONAL
NOTE is used to highlight ad di tion al
information which may be helpful to
you.
3
CHANGEABILITY OF THIS DOCUMENT
FORM 160.55-O1 (604)
In complying with YORK’s policy for continuous
prod uct improvement, the information contained in
this doc u ment is subject to change without notice.
While YORK makes no commitment to update or
pro vide current in for ma tion automatically to the
manual own er, that in for ma tion, if applicable, can
be ob tained by con tact ing the nearest YORK Applied
Systems Service ofÞ ce.
It is the responsibility of operating/service personnel
as to the applicability of these documents to the equip ment in question. If there is any question in the mind
of op er at ing/service personnel as to the applicability of
these documents, then, prior to working on the equip ment, they should verify with the owner wheth er the
equipment has been modiÞ ed and if current lit er a ture
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
SECTION 5
SECTION 6
SECTION 7
System Operating Procedures .................................................................. 124
System Components Description ............................................................. 131
Operational Maintenance ......................................................................... 135
Troubleshooting........................................................................................ 138
SECTION 8 Maintenance ............................................................................................. 144
SECTION 9 Preventive Maintenance ........................................................................... 152
SECTION 10 OptiSave Energy Analyser Feature .......................................................... 154
YORK INTERNATIONAL
5
LIST OF FIGURES
FORM 160.55-O1 (604)
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
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
6
YORK INTERNATIONAL
FORM 160.55-O1 (604)
SECTION 1
DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION
COMPRESSOR
PURGE
UNIT
CONDENSER
CONTROL
CENTER
MOTOR
1
29509A
FIG. 1 – MODEL YT MILLENNIUM CHILLER
SYSTEM OPERATION DESCRIPTION (SEE FIG. 2)
The YORK Model YT Millennium Chiller is commonly
ap plied to large air conditioning systems, but may be
used on other applications. The chiller consists of an
open motor mounted to a compressor (with integral
speed in creas ing gears) condenser, cooler and vari able
ß ow con trol.
The chiller is controlled by a modern state of the art
OptiView Control Center that monitors its op er a tion. The
Control Center is programmed by the op er a tor to suit job
speciÞ cations. Automatic timed start-ups and shut downs
are also programmable to suit night time, week ends and
holidays. The operating status, tem per a tures, pressures
and other information per ti nent to op er a tion of the chiller
are automatically dis played and read on a graphic message display. Other displays can be ob served by press ing
the keys as labeled on the Con trol Center. The chill er
with the OptiView Control Cen ter is applied with an
electro-mechanical start er, YORK Solid State Start er
(optional) or Variable Speed Drive (optional).
There could be either of two different Solid State Start ers applied. New production chillers are equipped with
the Mod “B” Solid State Starter. This starter contains a
COOLER
combination Logic/Trigger Board that interfaces the
Con trol Center with a serial communications link. Ear li er vintage chillers, such as those encountered in Con trol
Cen ter retroÞ t ap pli ca tions are equipped with the Mod
“A” starter. This Start er con tains a Trig ger Board that
in ter fac es to a Logic Board that is in stalled inside of the
Control Cen ter.
In operation, a liquid (water or brine to be chilled) ß ows
through the cooler, where boiling refrigerant absorbs heat
from the liquid. The chilled liquid is then piped to fan
coil units or other air conditioning terminal units, where
it ß ows through Þ nned coils, absorbing heat from the
air. The warmed liquid is then returned to the chiller to
complete the chilled liquid circuit.
The refrigerant vapor, which is produced by the boil ing
action in the cooler, ß ows to the compressor where the
rotating impeller increases its pressure and tem per a ture
and discharges it into the condenser. Water ß ow ing
through the condenser tubes absorbs heat from the re frig er ant va por, causing it to condense. The con dens er water
is sup plied to the chiller from an external source, usually
a cool ing tower. The condensed re frig er ant drains from
the con dens er into the liquid return line, where the vari-
YORK INTERNATIONAL
7
Description of System and Fun da men tals of Operation
able oriÞ ce meters the ß ow of liquid re frig er ant to the
cooler to com plete the refrigerant cir cuit.
The major components of a chiller are selected to han dle
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 leav ing the cooler. Prerotation vanes (PRV), located at the
en trance to the compressor impeller, compensate for
vari a tion in load (See Fig. 2, Detail A).
FORM 160.55-O1 (604)
7619A(D)
DETAIL A – COMPRESSOR PREROTATION VANES
COMPRESSOR
DISCHARGE
The position of these vanes is automatically controlled
through a lever arm attached to an electric motor lo cat ed
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.
PREROTATION VANES
(See Detail A)
SUCTION
DISCHARGE
BAFFLE
CON-
SUB-COOL-
FLOW CON TROL
FIG. 2 – REFRIGERANT FLOW-THRU CHILL ER
8
COOLER
ELIMINATOR
LD00924
OIL COOLER
YORK INTERNATIONAL
SECTION 2
OPTIVIEW CONTROL CEN TER
INTRODUCTION
FORM 160.55-O1 (604)
The YORK OptiView Control Center is a mi cro pro ces sor based control system for R-11 or R123 cen trif u gal
chillers. It controls the leaving chilled liq uid tem per a ture
via pre-rotation vane controls and has the abil i ty to limit
motor current via control of the pre-ro ta tion vanes. It is
com pat i ble with YORK Sol id State Start er (optional),
Variable Speed Drive (op tion al) and Electro-Mechanical
starter ap pli ca tions.
The panel comes conÞ gured with a full screen LCD
Graphic Display mounted in the middle of a keypad
in ter face. The graphic display allows the presentation
of several operating parameters at once. In addition,
the operator may view a graphical representation of the
his tor i cal 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 speciÞ c operations are provided on
many of the screens.
The graphic display also allows information to be rep re sent ed in both English (temperatures in °F and pres sures
in PSIA) and Metric (temperatures in °C and pres sures in
kPa) mode. The advantages are most ap par ent, however,
in the ability to display many languages.
The Control Center continually monitors the system operation and records the cause of any shutdowns (Safe ty,
Cycling or Normal). This information is re cord ed in
memory and is preserved even through a pow er fail ure
condition. The user may recall it for view ing at any
time. During operation, the user is con tin u al ly advised
of the operating conditions by various sta tus and warn ing
messages. In addition, it may be con Þ g ured to notify the
user of certain con di tions via alarms. A complete listing
of shutdown, status and warning messages is at tached in
the Display Messages section of this book.
There are certain screens, displayed values, pro gram ma ble 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 pa ram e ters displayed on
these screens are explained in detail in YORK Service
Man u al 160.55-M1. These parameters affect chiller
op er a tion and should NEVER be modifi ed by anyone
oth er than a qualifi ed Service Technician. They are
shown in this book for reference only.
Advanced Diagnostics and troubleshooting in for ma tion
for Service Technicians are included in YORK Service
Manual 160.55-M1. Also included in the Service man u al are detailed descriptions of chiller features, such as
the Refrigerant Level Control (Future), Purge sys tem,
Hot Gas By pass, Remote Setpoints and Smart Freeze
Pro tec tion.
The control center expands the capabilities of re mote
control and communications. By providing a com mon
networking protocol through the ISN GPIC YORK
Chill ers not only work well in di vid u al ly, but also as
a team. This new protocol allows in creased remote
con trol of the chiller, as well as 24-hour performance
mon i tor ing via a remote site. In ad di tion, compatibility
is main tained with the present net work of ISN com mu ni ca tions. The chiller also main tains the standard digital
remote ca pa bil i ties as well. Both of these remote con trol
capabilities allow for the standard Energy Man age ment
System (EMS) in ter face:
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
Mod u la tion
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
2
YORK INTERNATIONAL
9
Description of System and Fun da men tals 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 031-01730000
• OPT - Used on Microboard 031-02430000
• 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 high light ed by a
full screen graph ics display. This dis play is nested with in
a stan dard keypad and is sur round ed by “soft” keys
which are re de Þ ned based on the currently dis played
screen. Eight buttons are avail able on the right side of the
pan el and are primarily used for navigation between the
sys tem screens. At the base of the display are 5 ad di tion al
but tons. The area to the right of the key pad is used for
data entry with a stan dard numeric key pad provided for
en try of system setpoints and lim its.
The Decimal key provides accurate entry of
setpoint values.
A +/- key has also been provided to allow en try
of neg a tive values and AM/PM selection dur ing
time entry.
In order to accept changes made to the chiller
setpoints, the Check key is provided as a uni-
ver sal ‘En ter’ key or ‘Accept’’ symbol.
In order to reject entry of a setpoint or dismiss
an entry form, the ‘X’ key is provided as a uni-
ver sal ‘Can cel’ sym bol.
Cursor Arrow keys are pro-
vid ed to allow move ment on
screens which contain a large
amount of entry data. In ad di tion, these keys can be used
to scroll through his to ry and
event logs.
The Start/Stop control is op er at ed 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 un der
any condition. For safe ty reasons, this po si tion is
re quired for many maintenance tasks to be com plet ed
(such as prox im i ty probe and vane cal i bra tion). In
ad di tion, the switch must be placed in this state
fol low ing a Safety shut down before the chill er is
al lowed to re start. This guar an tees that manual in ter ven tion has tak en place and the shut down has been
ac knowl edged.
• START (◄)
The switch can only remain in this po si tion when
being acted upon by a man u al force. Once the user
has re leased the switch, it au to mat i cal ly re verts to
the RUN po si tion. Gen er al ly, this state only occurs
mo men tari ly as the operator at tempts to locally start
the unit. Once this po si tion has been sensed, if all
fault con di tions are cleared, the unit will en ter the
sys tem prelube (start se quence).
• RUN ( )
When in this position, the chiller is able to op er ate.
The switch spring-re turns to this state after it has
been tog gled to the START po si tion. When in this
state, the chiller is al lowed to function normally and
will also al low the chill er to au to mat i cal ly re start fol low ing a Cy cling shut down. The switch must be in
this state to re ceive a val id re mote start signal when
op er at ing under a re mote con trol source.
12
YORK INTERNATIONAL
INTERFACE CONVENTIONS
FORM 160.55-O1 (604)
OVERVIEW
The new graphical display on each control pan el al lows
a wide variety of information to be pre sent ed to the
user. Each screen description in this document will be gin
with a section entitled Overview which will de scribe
the graphical elements on the screen and give a short
summary of the functions available. Each el e ment on
the screen will then be categorized into three dis tinct
groups: Display Only, Programmable and Nav i ga tion.
Below is a short description of what types of in for ma tion
are included in these groups.
The Programmable values and Navigation commands
are also subject to access level restrictions as de scribed
below. For each of these elements, an in di ca tion is giv en
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 in for ma tion about the chiller operation. This type of in for ma tion 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
‘<’ sym bol. In some cases, the value may be rendered
in valid by other conditions and the display will use X’s
to in di cate this.
PROGRAMMABLE
Values in this group are available for change by the user.
In order to program any setpoints on the sys tem, the user
must Þ rst be logged in with the ap pro pri ate access level.
Each of the programmable values re quires a spe ciÞ c Ac-
cess Level which will be indicated beside the speciÞ ed
value. All of the pro gram ma ble controls in the system
fall into one of the categories described below:
Access Level
In order to program any setpoints on the sys tem, the user
must Þ rst login with an appropriate ac cess 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 Scr een (shown by de fault when pow er is ap-
plied to the system) and use the LO G IN but ton or uti lize
the CHANGE SETPOINTS key de scribed be low. At
this point, the user will be prompt ed to enter a User ID
and the corresponding Password. By default, the User
ID is zero (0). In order to gain stan dard OP ER A TOR
level access, the Pass word would be en tered as 9 6 7 5,
us ing the numeric keypad. OP ER A TOR ac cess reverts
to the VIEW lev el after 10 con tin u ous min utes without
a keypress. If a custom User ID and Pass word have been
deÞ ned (see User Screen ), the user may enter that User
ID and the cor re spond ing Password value.
If the correct password is received, the user is au tho rized with the appropriate Access Level. If an incorrect
pass word is entered, the user is notiÞ ed 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 with out
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 Leav ing 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 ap pears
dis play ing the present value, the up per and low er
limits of the programmable range and the de fault
value.
2. If the dialog box begins with the word “ENTER”,
use the numeric keys to enter the desired value.
2
YORK INTERNATIONAL
13
OptiView Control Center
FORM 160.55-O1 (604)
Lead ing zeroes are not necessary. If a dec i mal point
is nec es sary, press the ‘•’ key (i.e. 45.0).
Pressing the ▲ key, sets the entry value to the de fault
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 deÞ ned setpoint is de sired, press
the ‘X’ (Cancel) key to dismiss the di a log box.
3. Press the ‘!’ (Enter) key.
If the value is within range, it is accepted and the
dialog box disappears. The chiller will be gin to op er ate based on the new programmed value. If out of
range, the val ue will not be ac cept ed and the user is
prompt ed to try again.
Manual Controls
Some keys are used to perform manual control func tions. These may involve manual control of items such
as the pre-rotation vanes, variable oriÞ ce (future) or
hot gas bypass valve. Other keys in this category are
used to ini tiate/ter mi nate processes such as cal i bra tions
or re ports.
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)
Free Cursor
On screens containing many setpoints, a speciÞ c “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 “high light”
the desired setpoint Þ eld. 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 de signed to
describe the chiller operation. In order to move from one
screen to the next, navigation keys have been de Þ ned.
These keys allow the user to either move “for ward” to
a subscreen of the present screen or move “back ward”
to the previous screen. Except for the Home Screen
dis play, 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
con tain ing the name of the desired screen. The system
will im me di ate ly refresh the display with the graph ics
for that screen. Following is a layout of all the screens
and how they are connected.
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 Man u al 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
FORM 160.55-O1 (604)
LANGUAGES
are available. English is the default language. If a language
other than English is being displayed, an English-only speak-
The Screens can be displayed in various languages. Lan guage selection is done on the USER Screen. The desired
language is selected from those avail able. Not all lan guag es
ing person should nav i gate to the USER Screen using the
preceding Navigation chart and select English per the USER
Screen in struc tions in this book.
ANALOG INPUT RANGES
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 min i mum or maximum value, respectively.
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 dis play XXX if the pressure used for the calculation is out of range.
ANALOG INPUT
ENGLISH RANGE METRIC RANGE
2
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 de fault display appears. The primary values which must
be monitored and controlled are shown on this screen.
The Home Screen display depicts a visual rep re sen ta tion
of the chiller itself. Animation indicates chilled liq uid
ß ow.
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
Start er contact is on.
00347VIP
Input Power (kW)
Available only if the chiller system is utilizing a Vari able Speed Drive motor controller or Mod “B” Solid
State Start er. This dis plays the total in put power used
by the sys tem.
% 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 Re quired: VIEW
The Control Center restricts certain op er a tions based
on password entry by the operator. Three dif fer ent ac-
cess lev els are provided as follows: VIEW
: The panel
de faults to the low est access level which is termed
VIEW. In this mode, the chiller op er at ing val ues and
setpoints can be ob served, but no changes can be made.
OP ER A TOR: The second ac cess level is termed OP-
ER A TOR and will allow the cus tom er to change all
of the setpoints re quired to op er ate the chill er system.
The OP ER A TOR access level reverts to the VIEW
lev el af ter 10 continuous minutes without a keypress.
SER VICE: In the event that advanced di ag nos tics are
nec es sary, a SER VICE ac cess level has been pro vid ed.
16
YORK INTERNATIONAL
FORM 160.55-O1 (604)
Only qual i Þ ed service personnel utilize this access lev el.
This lev el provides advanced control over many of the
chiller func tions and allows cal i bra tion of many of the
chiller con trols. The access lev els are listed above in
hierarchical order be gin ning with the lowest level and
proceeding to the high est level. Users logged in under
higher access levels may perform any actions per mit ted
by lower access levels.
The OPERATOR access level is ac com pa nied by a
10-minute timeout. After ten (10) suc ces sive minutes
with out a keypress, the panel will re vert to the VIEW
ac cess level. This prevents un au tho rized changes to the
chiller if a user was logged in at a higher access level
and failed to logout. Proper pro ce dure requires that af ter
making necessary setpoint ad just ments the user re turn
to the Home Screen and logout.
Logout
Access Level Required: OP ER A TOR
This key is displayed when a user is logged in at any
level other than VIEW. Pressing it will return the ac cess
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 ca pa bil i ty.
(See HISTORY below.) This option will not be present
if the chill er is pres ent ly conÞ gured to log any in com ing
Adap tive Ca pac i ty Con trol map points. (See the Adap tive Capacity Control Details screen.)
Message Clear
Access Level Required: SER VICE
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
NAVIGATION
System
Used to provide additional system information.
Evaporator
A detailed view of all evaporator parameters, in clud ing
the programmable Leaving Chilled Liq uid Setpoints.
Condenser
A detailed view of all condenser parameters, in clud ing
control of the purge functions.
Compressor
A detailed view of all the compressor pa ram e ters. This
includes pre-rotation vane control, Hot Gas Bypass
Control and PRV cal i bra tion.
Oil Sump
A detailed view of all the oil pump and oil sump pa ram e ters.
Motor
A detailed view of the motor controller pa ram e ters, spe ciÞ c to the controller type presently utilized on the chill er
system. This allows programming of the Cur rent Limit
and the Pulldown Demand Lim it values. For a VSD
system, the Adaptive Capacity Control and Har mon ic
Filter information is con trolled under this screen.
Setpoints
This screen provides a single location to pro gram the
most common system setpoints. It is also the gateway
to many of the general system setup pa ram e ters such as
Date/Time, Display Units, Sched ul ing, Printer Setup,
etc.
History
This screen provides access to a snapshot of system data
at each of the last 10 shutdown con di tions.
2
Access Level Re quired: OP ER A TOR
Use of this key acknowledges a warning condition and
resets the message display associated with it.
YORK INTERNATIONAL
17
OptiView Control Center
FORM 160.55-O1 (604)
SYSTEM SCREEN
FIG. 5
OVERVIEW
This screen gives a general overview of common chill er
parameters for both shells.
DISPLAY ONLY
Discharge Temperature
Displays the temperature of the refrigerant in its gas eous 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 210VDC input in An a log Remote mode, PWM signal in
Digital Remote mode, MicroGateway interface in ISN
mode or a locally pro grammed value in local mode.
Evaporator Pressure
Displays the present refrigerant pressure in the evap o ra tor.
00348VIP
Evaporator Saturation Temperature
Displays the present saturation temperature in the
evap o ra tor.
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 trans duc er.
If either of the transducers used to cal cu late this dif fer en tial is out of range, the display Þ eld will show XX.X.
% Full Load Amps
This displays the percentage of full load amps utilized
by the system.
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YORK INTERNATIONAL
FORM 160.55-O1 (604)
Current Limit
Displays the current limit value in use. This value could
come from a 0-20mA or 4-20mA, 0-10VDC or 2-10VDC
input in An a log Remote mode, PWM signal in Digital
Remote mode, MicroGateway interface in ISN mode or
a locally pro grammed value.
PROGRAMMABLE
None
NAVIGATION
Home
Access Level Re quired: VIEW
Causes an instant return to the Home Screen.
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 evap o ra tor. All setpoints relating to the evaporator side of
the chiller are maintained on this screen. Animation of
the evaporation process indicates whether the chill er is
presently in a RUN condition. Animation of the liq uid
ß ow indicates chilled liquid ß ow.
DISPLAY ONLY
Chilled Liquid Flow Switch (Open / Closed)
Displays whether the liquid ß ow is present in the
evap o ra tor.
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 evap o ra tor.
Evaporator Saturation Temperature
Displays the present saturation temperature in the evap o ra tor.
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.
20
00349VIP
Evaporator Refrigerant Temperature
Displays the temperature of the refrigerant in the evap o ra tor, if the sensor is present.
Small Temperature Difference
Displays the difference between the Leaving Chilled
Liquid temperature and the Evaporator Refrigerant tem per a ture. The Evaporator Refrigerant temperature will be
represented by the Refrigerant Temperature sensor input
if the sensor is present, otherwise it will be rep re sent ed
by the Evaporator Saturation temperature.
Leaving Chilled Liquid Temperature Setpoints –
Setpoint
Displays the present setpoint to which the chiller is op er at ing, whether controlled locally or remotely.
Leaving Chilled Liquid Temperature Setpoints
– Shut down
Displays the Leaving Chilled Liquid Tem per a ture at which
the chiller will shut down to avoid over-cooling the build ing. By default this value is 4°F below the Leav ing Chilled
Setpoint.
Leaving Chilled Liquid Temperature Setpoints
– Restart
Displays the Leaving Chilled Liquid Tem per a ture 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 Tem per a ture
Setpoint.
YORK INTERNATIONAL
FORM 160.55-O1 (604)
PROGRAMMABLE
Local Leaving Chilled Liquid Tem per a ture Range Access Level Re quired: OP ER A TOR
This is the range over which an analog (0-20mA or 420mA, 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 be low).
Pro gram ma ble as ei ther 10°F or 20°F, with a de fault
of 20°F, it is added to the Base value to create a range
over which the re mote device can reset the setpoint. For
example, if this setpoint is pro grammed for 10°F and
the operator pro grammed value is 45°F, then the remote
device can set the Leav ing Chilled Liq uid Tem per a ture
setpoint over the range 45.0° - 55.0°F.
Local Leaving Chilled Liquid Temperature Setpoint
Access Level Re quired: OPERATOR
This value allows the user to deÞ ne the Leav ing Chilled
Liquid Temperature that is to be maintained by the chill er.
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 An a log Remote
mode or PWM signal in Digital Remote mode that chang es the setpoint by creating an offset above the operator
pro grammed Base Leaving Chilled Liquid Tem per a ture
setpoint. This offset may be de Þ ned up to 10.0°F or
20.0°F above the Base setpoint (see the Remote Leav ing
Chilled Liquid Temperature Setpoint Range de scrip tion
above). Additionally, a MicroGateway (in ISN Re mote
mode) can deÞ ne the setpoint through a serial data
stream. In this case, the in com ing setpoint is not an
off set that is applied to the locally programmed Base
setpoint value, but rath er is the setpoint value it self.
Leaving Chilled Liquid Temperature Cycling
Offset - Shutdown
Access Level Re quired: OP ER A TOR
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 TEM-
PER A TURE cycling shutdown. This is done by de Þ n ing
an offset below the Leaving Chilled Liquid Tem per a ture
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 tem per a ture for the
Leaving Chilled Liquid Temperature and pre vents overcooling of the building. Anytime the Leaving Chilled
Liquid Temperature setpoint is in creased, the shut down
threshold is 36.0°F (water) or 6.0°F (brine) for the next
ten (10) minutes. If Smart Freeze (see be low) is enabled,
the threshold is 34.0°F for the next 10 minutes. After
ten (10) minutes have elapsed, the shut down thresh old
becomes the pro grammed setpoint val ue.
Leaving Chilled Liquid Temperature Cycling
Offset - Restart
Access Level Re quired: OP ER A TOR
This value allows the user to specify the Leaving Chilled
Liquid Temperature at which the chiller will restart
af ter a shutdown on a LEAVING CHILLED LIQ UID
– LOW TEMPERATURE cycling shutdown. This is
done by deÞ ning an offset above the Leaving Chilled
Liquid Temperature setpoint. It is pro gram ma ble over a
range of 0°F to 70°F above the setpoint, to a max i mum
restart value of 80°F. The chiller will au to mat i cal ly re start when this temperature is reached. This setpoint can
be used to reduce chiller cycling by de lay ing the chiller
restart until the cooling load has in creased.
Brine Low Evaporator Cutout
Ac cess Level Re quired: SERVICE
This value is only available in Brine mode. It allows
the user to specify the Evaporator Pressure at which a
safe ty shutdown is initiated. Service Technicians refer
to YORK Service Manual 160.55-M1.
Sensitivity
Access Level Re quired: SER VICE
This value allows the user to adjust the sen si tiv i ty of the
Leaving Chilled Liquid Temperature con trol. Service
Tech ni cians refer to YORK Service Manual 160.55M1.
Smart Freeze (Off / On)
Access Level Re quired: SER VICE
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 Tech ni cians
refer to YORK Service Manual 160.55-M1.
Refrigerant (Enabled / Disabled)
Access Level Re quired: SER VICE
When an Evaporator Refrigerant Sensor has been in stalled
it must be enabled via this toggle before the sys tem will
utilize the new, enhanced resolution input. Ser vice Tech ni cians refer to YORK Service Manual 160.55-M1.
NAVIGATION
Home
Access Level Re quired: VIEW
Causes an instant return to the Home Screen.
2
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
con dens er. All setpoints relating to the condenser side
of the chiller are maintained on this screen. Animation
indicates condenser liquid ß ow. 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 con dens er.
Return Condenser Liquid Temperature
Displays the water temperature as it enters the con dens er.
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 Re frig er ant temperature and the Leaving Condenser Liq uid
tem per a ture. The Condenser Refrigerant tem per a ture
will be represented by the Condenser Saturation tem per a ture.
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 Re frig er ant temperature and the Drop Leg Refrigerant tem per a ture. The Condenser Refrigerant temperature will
be represented by the Condenser Saturation tem per a ture.
If the Drop Leg sensor is not present, this tem per a ture
is not displayed.
High Pressure Switch (Open / Closed)
Displays the present position of the high pressure switch.
This will indicate whether a High Pres sure fault is present.
Condenser Liquid Flow Switch
Indicates whether ß ow is present in the con dens er.
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
FORM 160.55-O1 (604)
Refrigerant Level Setpoint
Displays the setpoint to which the refrigerant level is
being con trolled.
Ramp Up Time Remaining
Displays the time remaining in the period in which
the Re frig er ant Level Setpoint is being ramped to the
Re frig er ant Level Target Setpoint. This only dis played
if the Re frig er ant Ramp is in effect and the value is
non-zero. Service Technicians refer to YORK Service
Man u al 160.55-M1.
PROGRAMMABLE
High Pressure W arning Thr eshold
Access Level Re quired: SER VICE
This value allows the user to deÞ ne the con dens er pres-
sure at which the chiller will initiate a warn ing.
Drop Leg (Enabled / Disabled)
Access Level Required: SERVICE
When a Drop Leg Refrigerant Sensor has been in stalled
it must be enabled via this toggle before the system will
utilize the new, enhanced resolution input. Service Tech ni cians refer to YORK Ser vice Manual 160.55-M1.
NAVIGATION
Home
Ac cess Level Re quired: VIEW
Causes an instant return to the Home Screen.
2
Purge
Access Level Re quired: VIEW
Moves to the subscreen al low ing programming of the
Purge System Setpoints.
Refrigerant Level Control
Access Level Re quired: 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
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
sys tem are maintained on this screen. The Purge tank
oil level, based on the position of the ß oat switches,
is de pict ed through animation. When both the Float
Switch es 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 be tween
these ex tremes 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.
Oth er wise, extinguished. For High EfÞ ciency (pump
assisted) purge systems, the valve is en er gized 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.
00351VIP
Ex tin guished when it is open, indicating the level is at
max i mum (full).
Bottom Float Switch (LED)
Illuminated when the Bottom Float Switch is closed, in di cat ing the Purge Tank oil level is at minimum (emp ty).
Extinguished when it is open, indicating the oil level is
above minimum.
Oil Valve Solenoid (LED)
Illuminated when the Oil Valve Solenoid is energized,
Þ lling 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 oc curred within the last 0 to 60 minutes, as displayed in
the Exhaust Window. After a 60 minute bypass at chill er
start, purge exhausts are counted until the Excess Purge
threshold is reached or the chiller shuts down, where up on the count is frozen. The count will be reset when
the chiller starts.
Top Float Switch (LED)
Illuminated when the Top Float Switch is closed,
in di cat ing the Purge Tank oil level is less than full.
24
Exhaust Window
Displayed as 0 to 60 minutes. After a 60 minute bypass
at chiller start, the Exhaust Window increments from 0
YORK INTERNATIONAL
FORM 160.55-O1 (604)
to 60. During this period, purge exhausts are counted
and the Exhaust Count displayed is that which has oc curred 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
roll ing 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 Þ rst 60
minutes of chiller run. Counts down the 60 minute purge
count bypass.
PROGRAMMABLE
High Effi ciency Purge System (Enabled/Disabled)
Access Level Required: SERVICE
Selects the appropriate control and purge exhaust
thresh olds for the installed purge system. High EfÞ -
ciency (pump assisted) purge systems exhaust at >90.0
PSIA. Non pump-assisted purge systems exhaust at
>34.7 PSIA.
Maximum Purges/Hour
Access Level Required: OP ER A TOR/SERVICE
Allows the user to deÞ ne the number of purge air ex-
hausts permitted before an Excess Purge Warning is displayed. With OPERATOR access lev el, the value can be
pro grammed over a range of 10 to 30 Purges/Hour. Service Technicians, in SERVICE ac cess level can pro gram
this setpoint over a greater range. Service Tech ni cians
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.
2
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25
OptiView Control Center
REFRIGERANT LEVEL CONTROL SCREEN
FORM 160.55-O1 (604)
FIG. 9
OVERVIEW
This screen displays a cutaway view of the chiller con dens er, along with the liquid refrigerant level sensor and
the ß ow control valve. All setpoints relating to the liq uid
level control are maintained on this screen. Through
animation, the variable oriÞ ce position is dis played. In
addition, the refrigerant ß ow control valve (variable
or i Þ ce) can be man u al ly op er at ed.
Requires a login ac cess level of
SERVICE. Service Tech ni cians re fer
to YORK Service Manual 160.55-M1
for operation in struc tions and ex pla na tion of all pro gram ma ble setpoints
and dis played values.
DISPLAY ONLY
Refrigerant Level Position
Displays the present position of the liquid level. The
re frig er ant 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 lev el 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. Ac tu al levels
above 79%, shown as 100% full.
00303VIP
Refrigerant Level Control Mode
Indicates whether the liquid level control is under man u al 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
Low er 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.
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YORK INTERNATIONAL
FORM 160.55-O1 (604)
[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 (Man u al)
This key puts the level control into manual mode and
sends a RAISE command to the variable oriÞ ce.
[Refrigerant Level Control] Lower (Manual)
This key puts the level control into manual mode and
sends a LOWER command to the variable oriÞ ce.
[Refrigerant Level Control] Hold (Manual)
This key puts the level control into manual mode and
sends a HOLD command to the variable oriÞ ce.
[Refrigerant Level Control] Auto
Returns the Level Control to automatic mode.
NAVIGATION
Home
Ac cess Level Re quired: VIEW
Causes an instant return to the Home Screen.
Condenser
Ac cess Level Re quired: VIEW
Return to the Condenser Screen.
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OptiView Control Center
FORM 160.55-O1 (604)
COMPRESSOR SCREEN
FIG. 10
OVERVIEW
This screen displays a cutaway view of the chiller com pres sor, revealing the impeller and shows all con di tions
as so ci at ed with the compressor. In addition, with the
proper Access Level, the pre-rotation vanes may be
manually controlled. Animation of the com pres sor
im pel ler indicates whether the chiller is pres ent ly in a
RUN condition. This screen also serves as a gateway
to subscreens for cal i brat ing the pre-rotation vanes, cal i brat ing the proximity probe, conÞ guring the Hot Gas
By pass or providing advanced control of the com pres sor
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 ei ther
of the trans duc ers used to calculate this dif fer en tial is
out of range, the display Þ eld 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 gas eous
state at discharge of the compressor as it travels to the
condenser.
00483VIP
Superheat Temperature
Displays the discharge superheat temperature, cal cu lat ed as (Discharge temperature – Condenser Sat u rat ed
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 Re quired: SER VICE
Indicates whether the vanes are under manual or au to mat ic control.
[Pre-Rotation Vanes] Open (LED)
Access Level Required: SERVICE
Indicates whether the vanes are in the process of open ing.
[Pre-Rotation Vanes] Close (LED)
Access Level Re quired: SER VICE
Indicates whether the vanes are in the process of clos ing.
Pre-Rotation Vanes Position
(Variable Speed Drive only)
Access Level Required: SERVICE
This value displays the present position of the pre-ro ta tion vanes as a percentage between 0 and 100%.
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Full Load Amps
Access Level Re quired: SER VICE
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 Re quired: SER VICE
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.
FORM 160.55-O1 (604)
Pre-Rotation Vane Calibration
Access Level Re quired: SER VICE
Only available if the chiller is stopped and the system
uses a Variable Speed Drive or Hot Gas Bypass con trol. 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)
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 con trol
of the Hot Gas Bypass valve. Only displayed if Hot gas
Bypass feature has been enabled on the OP ER A TIONS
Screen. Service technicians refer to YORK Service
Manual 160.55-M1.
Surge
(Flash memory Card version C.MLM.02.02.xxx and
lat er)
Access Level Required: VIEW
Moves to the sub-screen that allows viewing and
pro gram ming of the Surge Protection feature. Service
Tech ni cians refer to Service Manual 160.55-M1.
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NAVIGATION
Home
Access Level Required: VIEW
Causes an instant return to the Home Screen.
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OptiView Control Center
OptiView Control Center
FORM 160.55-O1 (604)
HOT GAS BYPASS SCREEN
FIG. 11
OVERVIEW
This screen displays a cutaway view of the Hot Gas By pass
Valve. All setpoints relating to Hot Gas Bypass con trol are
maintained on this screen. Also, related Hot Gas Bypass
control parameters are displayed for ref er ence. Through
animation, the relative valve position is dis played. In addition, the valve can be manually op er at ed.
Requires access level of SERVICE.
Ser vice Tech ni cians refer to YORK
Service Man u al 160.55-M1 for op er a tion in struc tions and explanation
of all pro gram ma ble setpoints and
dis played val ues.
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
ac tu al po si tion 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.
00476VIP
Pre-rotation Vanes Position
Displays the position of the Pre-Rotation Vanes over the
range of 0% (closed) to 100% (fully open). Dis played
at XXX until calibration procedure is per formed by
service technician.
Delta P/P
A parameter that represents system differential or
“Head”. It is calculated as [(condenser pressure – evap o ra tor pressure) / evaporator pressure].
Temperature Differential
The difference between the Leaving Chilled Liquid Tem per a ture and the Leaving Chilled Liquid Tem per a ture
Setpoint. It is cal cu lat ed by sub tract ing the Leav ing
Chilled Liq uid tem per a ture from the Leav ing Chilled
Liquid Tem per a ture 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
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