Home

Operating instructions

1. 56 FIG 30 COMMON SLOTS SCREEN PROGRAMMABLE Page Down Access Level Required OPERATOR Scroll down in the displayed data Page Up Access Level Required OPERATOR Scroll up in the displayed data Print Access Level Required OPERATOR Generates a list of the slot numbers of the available parameters NAVIGATION Home Causes an instant return to the Home Screen Trend Setup Causes a return to the Trend Setup Screen YNWS 02 GCE 09 09 2 33 MASTER SLOT NUMBERS LIST FOR USE WITH TREND FEATURE i DESCRIPTION r DESCRIPTION 256 System Chiller State 1800 Leaving Chilled Liquid Selected Temperature 259 System Are Safety Shutdown Contacts Closed Setpoint 260 System Are Cycling Shutdown Contacts Closed 1801 Leaving Chilled Liquid Control Sensitivity 261 System Are Anticipatory Alarm Contacts Closed 1802 Leaving Chilled Liquid Remote Temperature 262 System Operating Hours Range 264 System Number of Starts 1803 Leaving Chilled Liquid Restart Temperature Off 265 System Is Stop Switch Closed seu 266 System Is Start Switch Closed 1804 it Chilled Liquid Restart Temperature Set gt APRNO DONGA Read i0 an 1805 Leaving Chilled Liquid Shutdown Temperature 280 External Contact Is Remote Stop Closed Offset 281 External Contact Is Remote Start Closed 1806 Leaving Chilled Liquid Shutdown Temperature 282 External Conta
2. LCSSS PHASE ROTATION The Liquid Cooled Solid State Starter Logic Trigger Board has detected the three phase compressor motor power line voltage phase rotation is not correct The chiller can be started after the phase rotation is correct and the COMPRESSOR Switch is placed in the Stop Reset O position YN 02 GCE 09 09 Supersedes YN 02 GCE 05 05 Johnson JK Controls www johnsoncontrols com Subject to change without notice ALL RIGHTS RESERVED
3. 20 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 80 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 80 M1 Low Evaporator Cutout Access Level Required SERVICE Pressing this key displays three new toggles Low Evaporator Cutout It allows the user to specify the Evaporator Pressure at which a safety shutdown is initiated This pressure threshold is programmable over the range of 41 kPaG 6 PSIG to 496 kPaG 72 PSIG Default 496 kPaG 72 PSIG Low Cutout Delay Enabled Disabled If the Low Coutout Delay is enabled the shutdown will occur only if the Evaporator Pressure is less than Low Evaporator Cutout continuously for the programmed delay see below If disabled the shutdown will occur when the evaporator pressure reaches the Low Evaporator Cutout e Low Cutout Delay Allows the user to define the Low Cutout Delay over the range of 5 to 30 seconds with 5 seconds default value NAVIGATION Home Access Level Re
4. Access Level Required SERVICE This allows the user to specify up to four 4 Custom User ID values Each user ID will then require a corresponding Password and User Level A User ID can be defined for various maintenance personnel Service Technicians refer to YORK Service Manual 160 80 M1 Custom User Password 4 Access Level Required SERVICE This allows the user to specify up to four 4 Custom Password values Each Password will then require a corresponding User ID and User Level Service Technicians refer to YORK Service Manual 160 80 M1 Custom User Access Level 4 Access Level Required SERVICE This allows the user to specify up to four 4 Custom User Access Levels Each Access Level will then require a corresponding Password and User ID Service Technicians refer to YORK Service Manual 160 80 M1 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Return to the Setup Screen 39 YNWS 02 GCE 09 09 2 19 COMMS SCREEN M READY TO START ETAILS COMMS SCREEN Printer Setup Baud Press HIJ Setup UJ GOMZ Semp button to start programming Use cursor keys to select desired parameter Press Enter key tu mput parameter Baud TE 1 20 Dec 2004 8 55 E I DETAIL WARNING EXTERNAL 170 SERIAL COMMUNICATIONS 9600 Data Bits 8 Bits Parity None Stop Bits 1 Bit COM Semp 57600 Data Bits 8 Bits Home Serv
5. Job Name and Location Access Level Required SERVICE Factory defined job name and location the chiller is destined for Print Access level required VIEW Generates a Sales Order print report NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Return to the Setup Screen 2 22 OPERATIONS SCREEN DATE TIME c 23 Oct 2000 Em __ ACCESS LEVEL Service Run Time 0 Days 0 Hr 0 Min Hot Gas Disabled FIG 20 OPERATIONS SCREEN OVERVIEW This screen allows definition of general parameters having to do with the operation of the chiller DISPLAY ONLY Chiller Run Time Displays the amount of time the chiller has been running since the last start signal was received Value is reset to zero when the chiller enters Coastdown It remains at zero while shutdown and during Start Sequence Initiated PROGRAMMABLE Control Source Access Level Required OPERATOR Define whether the control of the chiller will be Local Digital Remote Analog Remote Modem Remote or ISN Remote Number of Starts Access Level Required ADMIN Displays the number of the starts the chiller has initiated This may be reprogrammed to a desired value generally when this value has been reset due to a Micro Board replacement but should not be done so arbitrarily Operating Hours Access Level Required ADMIN Displays the total accumulated run time of the chil
6. 21 0 Min 0 Hr 0 Days Local Print History FIG 22 HYSTORY DETAILS SCREEN OVERVIEW This screen allows the user to see an on screen printout of all the system parameters at the time of the selected shutdown Not all screens are shown above The number of screens required to display all of the data varies according to the type of motor starter and options applied DISPLAY ONLY History Printout This is the on screen printout of the system parameters PROGRAMMABLE Page Up Access Level Required VIEW Scroll up in the displayed data if applicable Page Down Access Level Required VIEW Scroll down in the displayed data if applicable Print History Access Level Required VIEW This generates a report listing the status of the chiller parameters at the time of the selected shutdown NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen History Access Level Required VIEW Causes a return to the History Screen 45 YNWS 02 GCE 09 09 2 25 SECUTITY LOG YSTE TATU SYSTEM RUN SYSTEM DETAILS LEAVING CHILLED LIQUID CONTROL SECURITY LOG SCREEN Gjzjury daiyuiii 1 2 3 4 5 6 7 8 g log Entry View 1 Details FIG 23 SECURITY LOG OVERVIEW This screen displays a listing of the last 75 setpoint changes They are listed and numbered in reverse order in which they were changed with the most recentlisted as number 1 Multiple pages are necessary t
7. 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 defining an offset below the Leaving Chilled Liquid Temperature setpoint It is programmable over a range of 0 6 C 1 F to 28 2 C 50 8 F below the setpoint to a minimum cutout of 2 2 C 36 F water 1 1 C 34 F water with Smart Freeze enabled or 22 2 C 8 F brine It establishes the minimum allowed temperature for the Leaving Chilled Liquid Temperature and prevents over cooling of the building Anytime the Leaving Chilled Liquid Temperature setpoint is increased the shutdown threshold is 2 2 C 36 0 F water or 22 2 C 8 0 F brine for the next ten 10 minutes If Smart Freeze is enabled the threshold is 1 1 C 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 after a shutdown on a LEAVING CHILLED LIQUID LOW TEMPERATURE cycling shutdown This is done by defining an offset above the Leaving Chilled Liquid Temperature setpoint It is programmable over a range of 0 C 0 F to 20 7 C 37 2 F above the setpoint to a maximum r
8. 20 seconds of the shutdown it is assumed it is not forthcoming and that message is replaced with this message The chiller can be started when the Motor Controller LCSSS Stop Contacts close Amissing interlock jumper between Starter Logic Trigger Board J1 1 and J1 12 will also produce this message LCSSS POWER FAULT The Liquid Cooled Solid State Starter Logic Trigger Board has detected that the compressor motor current in one or more phases has decreased to lt 10 of the FLA for a minimum of 1 line cycle This check is inhibited during the first 4 seconds of SYSTEM RUN and until the motor current is gt 25 of the FLA The chiller will automatically restart upon completion of SYSTEM COASTDOWN LCSSS LOW PHASE X TEMPERATURE SENSOR The Liquid Cooled Solid State Starter Logic Trigger Board has detected that the temperature of the starter phase A B or C designated as X in the message Silicon Controlled Rectifier SCR Module has decreased to lt 2 8 C 37 F This would generally be indicative of a disconnected or defective sensor If all three SCR Modules are indicating a temperature of lt 2 8 C 37 F the SCR Module cooling pump turns on This is accomplished by disconnecting all three sensors This feature allows Service Technicians to run the cooling pump while filling the cooling system by disconnecting plugs P2 P3 and P4 in the LCSSS LCSSS RUN SIGNAL The Liquid Cooled Solid State Starter receives two star
9. Home Screen display depicts a visual representation of the chiller itself Animation indicates chilled liquid flow 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 Input Power kW Available only if the chiller system is utilizing a Mod B Solid State Starter motor controller This displays the total input power used by the system 14 DATE TIME CONTROL SOURCE 27 Aug 2004 Ba Local a a _ r Condenser Liquid Temperature System ACCESS LEVEL S Service Evaporator Condenser Compressor Oil Sump Leaving 35 0 C Return 29 4 C History 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
10. O position LCSSS PHASE X SHORTED SCR A shorted Silicon Controlled Rectifier SCR in phase A B or C designated as X in the message has been detected by the Liquid Cooled Solid State Starter Logic Trigger Board The voltage across each SCR in monitored to detect the shorted condition The shorted condition must exist continuously for 5 seconds in order to annunciate the fault This check is disabled while the chiller is running The chiller can be started after the condition has been corrected and the COMPRESSOR switch is placed in the Stop Reset O position LCSSS OPEN SCR An open Silicon Controlled Rectifier SCR has been detected by the Liquid Cooled Solid State Starter Logic Trigger Board The open condition must exist continuously for 5 seconds in order to annunciate the fault The chiller can be started after the condition has been corrected and the COMPRESSOR switch is placed in the Stop Reset O position This check is disabled when the chiller is shut down In certain applications local power line conditions could interfere with the open SCR detection technique This requires a qualified Service Technician to disable this check Refer to YORK Service Manual 160 80 M1 LCSSS PHASE X OPEN SCR An open SCR in phase A B or C designated as X in message has been detected This safety shutdown has the same criteria as LCSSS OPEN SCR above However the phase in which the open SCR occurred is identified
11. OPERATOR Selects CONTINUOUS ONE SCREEN or TRIGGERED type of graph Collection Interval Access Level Required OPERATOR Selects the interval at which the parameters are sampled There are 450 data points displayed across the X Axis of the graph Each point represents the instantaneous value of the parameter The user selects the time interval between these points This is called the DATA COLLECTION INTERVAL or the interval at which the parameter is sampled This interval is programmable over the range of 1 second to 3600 seconds 1 hour in one second increments The selected interval not only determines the sample interval but also the full screen time display The full screen time display is a result of the 52 DATE TIME 27 Aug 2004 Leaving Chilled Liquid Temperature CONTROL SOURCE Local Home Service Trend 18 0 C 28 0 C Motor Run Off On Not Assigned Slot s Not Assigned Chart Type Triggered Not Assigned Collection Interval 1 Sec Not Assigned Press Enter key to mput parameter selected interval in seconds multiplied by the 450 data points For example if the Data Collection Interval is programmed for 900 seconds the parameter would be sampled every 900 seconds with the last 112 5 hours 4 7 days of data viewable on the screen Therefore the selected interval is a compromise between resolution and full screen time display Select the desired Data Collection Interval as follows
12. Pulldown Demand Limit 100 Pulldown Demand Time 0 Min Remote Analog Input Range 0 10 Volts Print Leaving Chilled Liquid Temperature Cycling Restart Displays the Leaving Chilled Liquid Temperature at which the chiller will restart after it has shut down due to over cooling temperature This value is calculated by adding the Leaving Chilled Liquid Temperature Cycling Offset Restart to the Leaving Chilled Liquid Temperature Setpoint Current Limit Setpoint Displays the present setpoint to which the chiller is operating whether controlled remotely or locally This value could come from a 0 20mA 4 20mA 0 10VDC or 2 10VDC input in Analog Remote mode PWM signal in Digital Remote mode Microgateway interface in ISN remote mode or a locally programmed value in Local mode PROGRAMMABLE Local Leaving Chilled Liquid Temperature Range Access Level Required OPERATOR This is the range over which an analog signal 0 20mA 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 5 6 C 10 F 11 1 C 20 F 16 7 C 30 F or 22 2 C 40 F with a default of 5 6 C 10 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 5 6 C 10 F and
13. Shutdown Ake Jiii 2 2 C Restart Izo Uzi 0 0 C GurrentLimit setpoint 100 Local leaving Giilled Ligurd i emperature Setpoint Range Shutdown 7 2 C 5 6 C 2 2 C FIG 13 SETPOINTS SCREEN OVERVIEW This screen provides a convenient location for programming the most common setpoints involved in the chiller control This screen also serves as a gateway toa sub screen for defining the setup of general system parameters DISPLAY ONLY Leaving Chilled Liquid Temperature Setpoint Displays the present setpoint to which the chiller is operating whether controlled remotely or locally This value could come from a 0 20mA 4 20 mA 0 10VDC or 2 10VDC input in Analog Remote mode PWM signal in Digital Remote mode Microgateway interface in ISN remote mode or a locally programmed value in local mode Leaving Chilled Liquid Temperature Cycling Shutdown Displays the Leaving Chilled Liquid Temperature at which the chiller will shut down to avoid over cooling the building This value is calculated by subtracting the Leaving Chilled Liquid Temperature Cycling Offset Shutdown from the Leaving Chilled Liquid Temperature Setpoint If this value is below the absolute minimum allowed shutdown temperature the minimum value is displayed DATE TIME CONTROL SOURCE 27 Aug 2004 KE Local Leaving EP Ligand Temperature Gyoing Uria Restart 0 0 C YNWS 02 GCE 09 09 Home Service Setup Local Motor Current Limit 100
14. access level When power is applied to the chiller the system begins with an Access Level of VIEW This will allow the user to navigate 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 YNWS 02 GCE 09 09 ID is zero 0 In order to gain standard OPERATOR level access the Password would be entered as 9 67 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 defined 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 notified 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
15. 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 5 6 C 10 F and the operator programmed value is 7 2 C 45 F then the remote device can set the Leaving Chilled Liquid Temperature setpoint over the range 7 2 45 0 F 12 8 C 55 0 F Local Leaving Chilled Liquid Temperature Setpoint Access Level Required OPERATOR This value allows the user to define the Leaving Chilled Liquid Temperature that is to be maintained by the chiller It is programmable over the range of 3 3 C 38 0 F to 21 1 C 70 0 F water or 20 0 C 4 0 F to 21 1 C 70 0 F brine Micro Board Program Jumper J35 must be removed for Brine cooling applications If Smart Freeze see below is enabled the range is 2 2 C 36 0 F to 21 1 C 70 0 F water If Ice Storage is ON and wanted the range is 20 0 C 4 0 F to 0 C 32 0 F brine Aremote device can provide an analog signal 0 20mA 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 this base or lowest setting allowed for the Leaving Chilled Liquid Temperature setpoint This offset may be defined up to 5 6 C 10 F 11 1 C 20 F 16 7 C 30 F or 22 2 C 40 F above this base setpoint see the Remote Leaving Chilled Liquid Temperature Setpoint Range description above Additionally a r
16. 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 sub screen 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 atext 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 gt symbol if it is below the normal operating range the low limit value will be displayed along with the lt 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 first be logged in with the appropriate access level Each of the programmable values requires a specific Access Level which will be indicated beside the specified 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 first login with an appropriate
17. as 0 kPa in this instance Oil 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 Discharge Superheat Displays the temperature differential between the Discharge Temperature and the Condenser Saturation Temperature Slide Valve Position The value displayed represents the position of the slide valve relative to fully closed at 0 and fully open at 100 Suction Temperature Displays the temperature of the refrigerant at suction of the compressor 23 YNWS 02 GCE 09 09 Suction Superheat Displays the suction superheating temperature for setting the expansion valve It is calculated between Evaporator Saturation Temperature and Suction Temperature Oil Return Solenoid LED Indicates whether the solenoid is presently energized Full Load Amps Electromechanical Starter only 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 Slide Valve Load Manual Access Level Required SERVICE This key puts the slide valve control into manual mode and loads the slide valve The slide valve will continue to load until the Unload Ho
18. bits with which the panel shall communicate to the modem port COM 2 Parity Bit s Define the number of parity bits with which the panel shall communicate through the modem port COM 2 Stop Bit s Define the number of stop bits with which the panel shall communicate through the modem port NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Return to the Setup Screen 2 20 PRINTER SCREEN TE LEAYING CHILLED LIQUID CONTROL PRINTER SCREEN Print Report Print AII Histories FIG 18 PRINTER SCREEN OVERVIEW This screen allows definition of the necessary communications parameters for the printer DISPLAY ONLY Time Remaining Until Next Print Displays the time until the next print log will occur if the function is enabled PROGRAMMABLE Log Start Time Access Level Required OPERATOR Set the time at which scheduled print logs will begin Output Interval Access Level Required OPERATOR Define the interval at which log printing will occur Automatic Printer Logging Enabled Disabled Access Level Required OPERATOR Enable the printer to begin printing status reports beginning at the programmed start time and recurring at the interval defined above Printer Type Access Level Required OPERATOR Define the printer type connected to the chiller system DATE IME 27 Aug 2004 YNWS 02 GCE 09 09 Home Setup Automatic Print
19. by greater than or equal to the number of degrees of this Off Setpoint The OFF setpoint is programmed over the range of 1 1 C 2 0 F to 8 3 C 15 0 F default 1 1 C 2 0 F Service Technicians refer to YORK Service Manual 160 80 M1 for an explanation of this setpoint NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Compressor Access Level Required VIEW Return to the Compressor Screen 2 11 SLIDE VALVE CALIBRATION SCREEN DATE TIME 27 Aug 2004 SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL SLIDE VALVE CALIBRATION SCREEN Slide Valve Loading Slide Valve Unioadiny Sie Valve Voltage 0 00V z t YNWS 02 GCE 09 09 Home Compressor j in fe WOOO u a LL Start Calibration FIG 9 SLIDE VALVE CALIBRATION SCREEN OVERVIEW This screen displays a cutaway view of the chiller compressor revealing the rotary screw and slide valve and provides the capability of calibrating the slide valve Q NOTE Requires a login access level of SERVICE Service Technicians refer to YORK Service Manual 160 80 M1 for operation instructions and explanation of all programmable setpoints and displayed values DISPLAY ONLY Slide Valve Loading LED Indicates the slide valve is loading Slide Valve Unloading LED Indicates the slide valve is unloading Calibration Messages These are text messages which step
20. compressor During the first 3 minutes of System Run the Slide Valve position is maintained at a minimum of 25 If the position decreases to 22 a load signal is applied until the position is again gt 25 After the chiller has been running for gt 3 minutes the Slide Valve minimum position must be maintained to that which will provide enough oil flow through the compressor to maintain sufficient oil level in the Oil Separator There are two different selectable methods that can be employed as the Minimum Load Control Source Slide Valve or Motor FLA If Slide Valve is selected the minimum allowed slide valve position is programmable over the range of 0 to 70 If Motor FLA is selected the minimum allowed position is that which will maintain the compressor motor current above the programmed Minimum Load FLA Setpoint 15 to 70 FLA The MINIMUM LOAD CONTROL SOURCE and associated setpoints are programmed by a Service Technician Regardless of which method is in control if the slide Valve position decreases to lt the minimum allowed position a 1 second load pulse is applied every 3 seconds until it meets the minimum allowed position While the Slide Valve unloading is inhibited MINIMUM LOAD LOAD LIMIT is displayed After the chiller has been running for gt 3 minutes the Slide Valve is opened or closed to control the Leaving Chilled Liquid Temperature to the Leaving Chilled Liquid Temperature Setpoint If the actual
21. 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 Only qualified 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 time out 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 Pr
22. temperature is gt 0 2 C 0 4 F above or below the Setpoint varying duration load or unload pulses as appropriate are applied to the Slide Valve Actuator to correct the error per the following schedule as explained later unload pulses are not applied in Ice Storage Mode Error C Action 2 2 4 0 F 3 3 sec load pulse every 7 8 sec 1 4 2 5 F 0 6 1 0 F 0 6 1 0 F 1 4 2 5 F 2 4 sec load pulse every 8 7 sec 0 75 sec load pulse every 10 4 sec 0 75 sec unload pulse every 10 4 sec 2 4 sec unload pulse every 8 7 sec Normally the load and unload pulses are of the same duration for the same error above or below the Leaving Chilled Liquid Temperature Setpoint This provides proper operation in most applications However in those applications where load is quickly removed from the chiller faster unloading could be necessary A Service Technician can adjust the Sensitivity setpoint to provide faster unloading The following Load Limiting conditions will override the normal leaving chilled liquid temperature control e Low Evaporator Pressure e High Condenser Pressure e High Motor Current e Low Discharge Superheat The Slide Valve can be manually controlled by a Service Technician from the COMPRESSOR Screen using the Keypad keys The Slide Valve position will be shown as XXX until the Slide valve calibration is performed by a Service Technician To prevent overcooling the building or
23. the Y Axis Selecting a parameter for a Data Point sets this to the default value which is the lowest value allowed for that parameter It can be changed to a value that provides a more appropriate resolution for the parameter being monitored To change use the SELECT key as described above and enter the desired value The value must always be set to a value less than the Data Point Max Otherwise a red graph is displayed on the Trend Screen with the words TREND MAX MUST BE gt TREND MIN If the parameter selected for this data point is a digital type on off this value must be set to zero 0 Zero indicates the OFF state Data Point Max 1 6 Access Level Required OPERATOR Only displayed if the associated slot number is not zero This is the maximum value displayed for the Y Axis Selecting a parameter for a Data Point sets this to the default value which is the highest value allowed for that parameter It can be changed to a value that provides a more appropriate resolution for the parameter being monitored To change use the SELECT key as described above and enter the desired value The value must always be set to a value greater than the YNWS 02 GCE 09 09 Data Point Min Otherwise a red graph is displayed on the Trend Screen with the words TREND MAX MUST BE gt TREND MIN There are 20 Y axis divisions If a MIN MAX span is selected that is not evenly divided by 20 the Program will automatically select the next highe
24. the oldest data is dropped from the left hand side of the graph at the next collection interval Thereafter the oldest data is dropped from the left hand side of the graph at each data collection interval If TRIGGERED is selected data collection can be set to start or stop based upon the selected TRIGGER ACTION START or STOP If START is selected data collection will not begin until the Triggers have been satisfied and any selected TRIGGER DELAY has elapsed Data collection will stop at the completion of one screen of data as with the ONE SCREEN If STOP is selected data collection will not stop until the Triggers have been satisfied and any selected TRIGGER DELAY has elapsed If a power failure occurs while the trending is running the trending is stopped Upon restoration of power the last screen of data that was collected will be displayed on the trending screen The START key must be pressed to initiate a new trend screen DISPLAY ONLY This screen allows the user to view the graphical trending of the selected parameters and is also a gateway to the graph setup screens Q NOTE A red screen with the words TREND MAX MUST BE gt TREND MIN will appear if the Y Axis minimum has been programmed to a value that is greater than the Y Axis maximum for any parameter If this appears proceed to the Trend Setup Screen to change the values PROGRAMMABLE Start Access Level Required OPERATOR Pressing this key
25. the operator programmed value is 7 2 C 45 F then the remote device can set the Leaving Chilled Liquid Temperature setpoint over the range 7 2 45 F 12 8 C 55 F 33 YNWS 02 GCE 09 09 Local Leaving Chilled Liquid Temperature Setpoint Access Level Required OPERATOR This value allows the user to define the Leaving Chilled Liquid Temperature that is to be maintained by the chiller It is programmable over the range of 3 3 C 38 0 F to 21 1 C 70 0 F water or 20 0 C 4 0 F to 21 1 C 70 0 F brine If Smart Freeze is enabled the range is 2 2 C 36 0 F to 21 1 C 70 0 F water A remote device can provide an analog signal 0 20mA 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 defined up to 5 6 C 10 F 11 1 C 20 F 16 7 C 30 F or 22 2 C 40 F above the Base setpoint see the Remote Leaving Chilled Liquid Temperature Setpoint Range description above Additionally a Microgateway in ISN Remote mode can define the setpoint through a serial data stream In this case the incoming setpointis 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
26. 1 Determine the desired time interval in seconds between data samples 2 Calculate the full screen time display as follows e 450 x Data Collection Interval full screen seconds e full screen seconds 60 full screen minutes full screen minutes 60 full screen hours e full screen hours 24 full screen days 3 Decide if the resultant sample interval and full screen display meet the requirements If not select a different sample interval Select Access Level Required OPERATOR This key is used to enter the slot numbers and the minimum and maximum Y Axis values of each parameter to be trended Pressing this key places a yellow box around Data Point 1 Slot Number A and V navigation keys to place the box around the value of Data Points 1 through 6 to be changed With the desired value selected press the v key A dialog box is displayed permitting data entry Data Point Slot 1 6 Access Level Required OPERATOR Use the SELECT key as described above and enter the slot number from the Common Slots Screen or Master Slot Number List of the desired parameter to be trended The selected parameter description will be displayed for the Data Point Setting this slot number to zero will disable trending for that particular Data Point Any or all points can be disabled Data Point Min 1 6 Access Level Required OPERATOR Only displayed if the Associated Slot Number is not Zero This is the minimum value displayed for
27. 10VDC input in Analog Remote mode PWM signal in Digital Remote mode ISN Microgateway interface in ISN mode or a locally programmed value in local mode Evaporator Pressure Displays the present refrigerant pressure in the evaporator 16 DATE TIME CONTROL SOURCE 27 Aug 2004 reel Local Home Service Disthange emperawne 54 5 C He toad Amps 60 radi Cini 100 He Valve Position 30 Gz qin hemperaure Leaving 7 2 C Retin 12 8 C Seipome 7 2 C aporator Pressure Evaporator Saturation 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 Temperature Displays the temperature of the oil in the separator sump Differential Oil Pressure Displays the pressure differential between the oil pressure transducer input to the compressor and the evaporator pressure transducer The displayed value includes offset pressure derived from auto zeroing during the START SEQUENCE INITIATED If either of the transducers used to calculate this differential is out of range the display field will sho
28. B Solid State Starter Screen Setpoints Screen 10 11 13 14 16 18 21 23 26 27 28 30 31 33 2 16 2 17 2 18 2 19 2 20 2 21 2 22 2 23 2 24 2 25 2 26 2 27 2 28 2 29 2 30 2 31 2 32 2 33 2 34 Setup Screen Schedule Screen User Screen Comms Screen Printer Screen Sales Order Screen Operations Screen History Screen History Details Screen Secutity Log Security Log Details Custom View Screen Custom View Setup Trend Screen Trend Setup Screen Advanced Trend Setup Screen Common Slots Screen Master Slot Numbers List for Use with Trend Feature Display Messages 35 37 39 40 41 42 43 44 45 46 47 48 49 50 52 54 56 57 59 YNWS 02 GCE 09 09 YNWS 02 GCE 09 09 1 DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION OIL SEPARATOR FIG 1 MODEL YNWS MILLENIUM CHILLER 1 1 SYSTEM OPERATION DESCRIPTION The YORK Model YNWS Millennium Chiller is applied to large air conditioning systems but may be used on other applications The chiller consists of an open motor connected to a rotary screw compressor with an adaptor support and coupling an oil separator a condenser a evaporator and an OptiView Control Center The chiller is controlled by a modern state of the art Graphic Control Center that monitors its operation The Control Center is programmed by the operator to suit job specificatio
29. EEN Print History View Details OVERVIEW This screen allows the user to browse through the faults In order to get a more thorough reporting of the system conditions at the time of the recorded shutdown move to the sub screen HISTORY DETAILS The user may use the Select Fault button to select the history to view At this point the View Details button is used to jump to a sub screen containing stored chiller parameters values at the time of the shutdown Additionally the Print History button can be used to generate a hard copy report of the parameter values at the time of the shutdown DISPLAY ONLY Last Normal Shutdown This window displays the date and time and the description of the last normal shutdown A normal shutdown is defined as Local Panel rocker switch Remote Digital Analog or ISN Last Fault While Running This window displays the date and time and the description of the last safety or cycling shutdown while the system was running Last Ten Faults This window displays a chronological listing most recent first of the date and time and the description of the last ten safety or cycling shutdowns that occur while the system is running or stopped 44 DATE TIME CONTROL SOURCE 27 Aug 2004 Ba Local e Home Service Trending Custom View Print All Histories PROGRAMMABLE Print History Access Level Required VIEW This generates a report listing the status of the chiller paramete
30. ERVICE Only displayed if Motor FLA is selected as the Minimum Load Control Source Allows the user to set the motor current value to that which will maintain the Slide Valve position above the minimum allowed position Service Technicians refer to YORK Service manual 160 80 M1 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Hot Gas Access Level Required SERVICE Only available if the system uses Hot Gas Bypass Moves to the sub screen allowing for the setup of Hot Gas Service Technicians refer to YORK Service Manual 160 80 M1 Slide Valve Calibration Access Level Required SERVICE Only available if the chiller is stopped Moves to the sub screen allowing calibration of the Slide Valve Service Technicians refer to YORK Service Manual 160 80 M1 YNWS 02 GCE 09 09 25 YNWS 02 GCE 09 09 2 10 HOT GAS BYPASS SCREEN SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL HOT GAS BYPASS SCREEN IE Slide Valve Posjejnyj 12 8 C Retin Chiled guid Temperature 7 2 C Leaning Ghilled Actve Setpoint DATED UME 27 Aug 2004 Local Home Service Compressor On Setpoint 0 6 C Off Setpoint 1 1 C Hot Gas Solenoid On FIG 8 HOT GAS BYPASS SCREEN The HOT GAS BYPASS Screen is accessed from the COMPRESSOR Screen The Hot Gas ON and OFF Setpoints are programmed on this screen and system parameters pertinent to Hot Gas Bypass operation are displayed An LED i
31. ET position then to START position OIL SEPARATOR LOW LEVEL The chiller is shut down because the separator oil level switch has opened indicating a low oil level in the separator To restart the chiller press COMPRESSOR switch to STOP RESET position then to START position The oil level switch must be open for 30 continuous seconds in order for this safety shutdown to be initiated This prevents momentary switch fluctuations from causing nuisance shutdowns CONTROL PANEL POWER FAILURE A Control Power failure has occurred The chiller can be started after the COMPRESSOR switch is placed in the Stop reset O position This message can indicate a Cycling auto restart after power failure or Safety manual restart after power failure shutdown depending upon Control Center configuration It indicates a Cycling shutdown when displayed in orange characters Safety shutdown when displayed in red characters The Control center is configured for auto restart or manual restart after power failure by a qualified Service technician following instructions in YORK Service Manual 160 80 M1 MOTOR OR STARTER CURRENT IMBALANCE The three phase compressor motor current imbalance was gt 30 continuously for 45 seconds The imbalance is not checked until the chiller has been running for at least 45 seconds and the average of the three phases of motor current is gt 80 of the programmed 100 chiller Full Load Amps The average is
32. G Enabled Freeze Time 30 Min High Pressure Switch Condenser Liquid Flow Switch Condenser Liquid Pump 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 flow is present in the condenser Condenser Liquid Pump Run Stop Indicates whether Condenser liquid pump is operating PROGRAMMABLE High Pressure Warning Threshold Access Level Required SERVICE This value allows the user to define the condenser pressure at which the chiller will initiate a warning The pressure at which a high pressure warning message is displayed and the slide valve is inhibited from further loading is programmable over the range of 310 kPaG 44 9 PSIG to 2068 kPaG 300 PSIG The default value is 2068 kPaG 300 PSIG The warning message will clear and the slide valve inhibit is removed when the pressure decreases to 34 5 kPaG 5 PSIG below the programmed value Freeze Warning Enabled Disabled Access Level Required SERVICE Enables and disables the standby chiller freeze protection feature Service Technicians refer to York Service Manual 160 80 M1 21 YNWS 02 GCE 09 09 Freeze Time Access Level Required SERVICE Only displayed if Freeze Warning feature is Enabled Allows the user to define the Freeze Warning bypass time 30 to 60 minutes Standby chiller Freeze warnings
33. ORK Service Manual 160 80 M1 2 OPTIVIEW CONTROL CENTER 2 1 INTRODUCTION The YORK OptiView Control Center is a microprocessor based control system for R717 screw chillers It controls the leaving chilled liquid temperature via slide valve controls and has the ability to limit motor current via control of the slide valve Further it is compatible with the York Solid State Starter optional and electromechanical starter applications The panel comes configured 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 specific 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 PSIG 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 recal
34. PERATOR This value allows the user to specify the Leaving Chilled Liquid Temperature at which the chiller will restart after a shutdown on a LEAVING CHILLED LIQUID LOW TEMPERATURE cycling shutdown This is done by defining an offset above the Leaving Chilled Liquid Temperature setpoint It is programmable over a range of 0 C 0 F to 20 7 C 37 2 F above the setpoint to a maximum restart value of 26 7 C 80 F If Ice Storage mode is ON there are two different RESTART Setpoints employed One is programmed and will be in effect when the Leaving Chilled Liquid Temperature Setpoint is lt 0 C 32 0 F The other is programmed and will be in effect when the Setpoint is gt 0 C 32 0 F Each can be programmed to a different value 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 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 80 M1 Ice Storage On Off Access Level Required SERVICE When in Brine Mode this must be turned on or off via this toggle and then the Leaving Chilled Liquid Temperature setpoint is used to automatically activate or deactivate Ice Storage Mode Service Technicians refer to YORK Service Manual 160 80 M1
35. Programming se cursor keys to select desired parameter Mess Enten key to mput parameter YORK Slot s c 1997 2000 YORK INTERNATIONAL Fri 27 Aug 2004 12 07 23 262 Operating Hours 264 Humber Of Starts Evaporator 1792 Leaving FIG 26 CUSTOM VIEW SETUP OVERVIEW This screen allows the Service technician to select up to 10 parameters for display on the Custom View Screen Q Requires a login access level of SERVICE Service Technicians refer to YORK Service Manual 160 80 M1 for operation instructions and explanation of all programmable setpoints and displayed values NOTE DISPLAY ONLY Slot Numbers Lists the available parameters that can be displayed The desired parameters for display are selected from this list PROGRAMMABLE Page Up Scroll up through list of available parameters Page Down Scroll down through list of available parameters DATE TIME CONTROL SOURCE E 27 Aug 2004 fiz09 Local Chilled Liquid Temperature YNWS 02 GCE 09 09 Home ACCESS LEVEL S Serwice Custom View Learing Chilled Liquid Temperature Return Chilled Liquid Temperature E vaporator Pressure Evaporator 5 aturation Temperature Leaving Condenser Liquid Temperature Return Condenser Liquid Temperature Condenser Pressure Select Condenser aturation Temperature Discharge Temperature uperheat Temperature CORPORATION Page Dawn Select First use the Page Up and Page Down
36. SOURCE 27 Aug 2004 na Local ACCESS LEVEL _ Serwice Local Motor Current Limit 100 100 Pulldown Demand Limit Pulldown Demand Time 640A Full Load Amps L oe Voltage Range Disabled Starting Current FIG 12 MOD B SOLID STATE STARTER SCREEN OVERVIEW This screen displays information pertaining to the Mod B Solid State Starter DISPLAY ONLY Motor Run LED Indicates whether the digital output from the controls is commanding the motor to RUN Motor Current Full Load Amps Displays the motor current as a percentage of the Full Load Amps FLA value Current Limit Setpoint Displays the current limit value in use This value could come from a 0 20mA 4 20 mA 0 10VDC or 2 10VDC input in Analog Remote mode PWM signal in Digital Remote mode Microgateway interface in ISN remote mode or a locally programmed value in local mode Pulldown Demand Time Left Displays the time remaining in the programmed pulldown period Input Power Displays the Kilowatts measured by the Solid State Starter KW Hours Displays the cumulative amount of kilowatts used over time Starter Model Displays the Solid State Starter model that is applied to the chiller Starter Models are 7L 14L 26L or 33L Voltage Phase A B C Display the 3 phase input line voltage measured by the Solid State Starter Current Phase A B C Display the 3 phase motor current values measured by the Solid State Start
37. U SYSTEM RUN BYST SYSTEM DETAILS LEAVING CHILLED LIQUID CONTROL CUSTOM SCREEN 7 2 C 12 8 C 35 0 C 29 4 C 54 5 C 16 6 C 53 8 kPaA 130 3 kPa 187 5 kPaD 50 Print FIG 25 CUSTOM VIEW SCREEN OVERVIEW This screen allows up to 10 Service Technician selected parameters to be displayed These parameters are selected from a list on the Custom View Setup Screen This allows the Service Technician to display parameters pertinent to a particular problem during troubleshooting At completion of the service call the display can be cleared or the parameters can be left there for monitoring by operations personnel DISPLAY ONLY None PROGRAMMABLE Print Access Level Required VIEW This generates a listing of the parameters displayed on this screen 48 DATES 27 Aug 2004 13 50 Home History Setup NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen History Access Level Required VIEW Causes an instant return to the History Screen Setup Access Level Required SERVICE Causes a jump to the sub screen that allows selection of the parameters to be displayed 2 28 CUSTOM VIEW SETUP SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL CUSTOM SETUP SCREEN Gustom ZY Custom SoA Custom sots Gistom slots ustom Sipts Gustom Siott Custom Sipt Custom Slots isin slued Gustom Slot 10 ess Select Dutton to start
38. YNWS YNRS OPERATING INSTRUCTIONS YNWS 02 GCE 09 09 WATER COOLED LIQUID CHILLER AND REMOTE AIR COOLED CHILLER OPTIVIEW CONTROL CENTRE sA 14 OPTIVIEW CONTROL CENTER CE R717 ual YORK Johnson WK BY JOHNSON CONTROLS Controls 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 under
39. and 70 If Motor FLA is selected the minimum allowed slide valve position is that which will maintain the motor current above the programmed value 15 to 70 FLA Regardless of which method is selected if the Slide Valve position falls below the minimum allowed position 60 a 1 second load pulse is applied every 3 seconds until it meets the minimum allowed position The control source is selected by a Service Technician using instructions in YORK Service manual 160 80 M1 START INHIBIT MESSAGES ANTI RECYCLE XXMIN SEC The chiller is inhibited from starting because the 30 minute anti recycle time has not yet elapsed Time remaining is displayed SLIDE VALVE POSITION gt 30 The chiller is inhibited from starting because the slide valve did not properly unload This could be the result of a defective slide valve actuator or mechanical problem MOTOR CURRENT gt 15 FLA The Control center has detected a Compressor Motor Current of a magnitude that is gt 15 of the chiller Full Load Amps for 10 continuous seconds while the chiller is shutdown As long as this condition exists the oil pump is turned on This is generally indicative of a failure of the motor starter Control Center start circuits or motor current feedback circuits After motor current is no longer detected a SYSTEM LOCKOUT DELAY is performed The chiller can be started after motor current is no longer detected the SYSTEM LOCKOUT DELAY has complet
40. and assure differential pressure accuracy this offset is added or subtracted from the actual differential pressure during System Run to produce the displayed differential value For example the displayed Differential Oil Pressure is the result of subtracting the output of the Evaporator Transducer from the Oil Transducer If the Oil Pressure transducer indicates 6 9 kPaG 1 0 PSIG greater than the Evaporator transducer during the auto zeroing period then 6 9 kPaG 1 0 PSIG will be subtracted from the displayed kPaD PSID value during system run Similarly if the Oil Pressure Transducer indicates 6 9 kPaG 1 0 PSIG less than the Evaporator Transducer during the this period then 6 9 kPaG 1 0 PSIG is added to the displayed kPaD PSID value during system run In certain applications the Auto Zeroing might have to be disabled Only a Service Technician should disable this feature The Chilled Liquid Flow Switch position is checked 25 seconds into the Start Sequence period If not closed a Cycling shutdown is performed At the completion of the 30 second start sequence the Oil Line Solenoid Valve is energized opened SYSTEM RUN is displayed and the start signal is applied to the compressor motor starter Upon entering System Run a continuous load signal is applied to the slide valve actuator until the Slide Valve position is gt 25 This more rapidly increases system pressure differential to facilitate oil flow through the
41. and close the Motor controller CM contacts located on the CM 2 Board and connected between TB6 16 and TB6 53 in the Control Center in lt 3 seconds to initiate the shutdown and produce this message An LED on CM 2 Board device illuminates to identify the fault The chiller will automatically restart when the contacts close CONTROL PANEL SCHEDULE The programmed Daily Schedule Setpoint has shutdown the chiller If this occurs while the chiller is running the the Slide Valve is fully unloaded prior to shutting down the chiller The chiller will automatically restart at the next scheduled start time MOD B SOLID STATE STARTER CYCLING SHUTDOWN MESSAGES LCSSS INITIALIZATION FAILED When AC Power is restored to the system after a power failure an initialization process occurs wherein the Control Center attempts to establish communications through the serial communications link with the Liquid Cooled Solid State Starter If communications are not established within 10 consecutive attempts a Cycling shutdown is performed and this message is displayed The Control Center attempts to establish communications until successful LCSSS SERIAL COMMUNICATIONS After communications have been successfully established in the INITIALIZATION process the Control Center initiates a data transmission to the Liquid Cooled Solid State Starter on the serial communications link every 2 seconds After these communications have been establis
42. any phase has decreased to lt 30 of the lowest value of the programed voltage range Ifthe programmed voltage range is Disabled a value of 60 Vac is used as the threshold The chiller will automatically restart when the line voltage is gt the shutdown threshold The voltage range is programmed by a Service technician following instructions in Service Manual 160 80 M1 SAFETY SHUTDOWN MESSAGES EVAPORATOR LOW PRESSURE This message is applicable only if the Smart Freeze feature is not activated If Smart Freeze is activated and has initiated the shutdown Evaporator Low Pressure Smart Freeze is displayed Its description follows The evaporator pressure as sensed by the Evaporator Transducer has decreased to the Safety shutdown threshold Additionally if the Low Cutout Delay is enabled the evaporator pressure must be less or equal to the safety threshold during the programmed Low Cutout Delay The shutdown threshold should not be changed by anyone other than a qualified Service Technician following instructions in YORK Service Manual 160 80 M1 The chiller can be started after the evaporator pressure increases to the safety threshold 22 kPaG 3 2 PSIG and the COMPRESSOR switch is placed in the Stop Reset O position EVAPORATOR LOW PRESSURE SMART FREEZE Smart Freeze Protection is activated and has shut down the chiller because the evaporator temperature has been below the Smart Freeze threshold fo
43. ard over the serial communications link Since serial communications are initiated every 2 seconds this message is typically displayed for a few seconds and then replaced with one of the following fault messages LCSSS HIGH INSTANTANEOUS CURRENT The Liquid Cooled Solid State Starter Logic Trigger Board detected that the compressor motor current in any phase exceeded 1 1 1 414 x RMS value of the programmed Start Current for a minimum of 1 second The chiller can be started after the COMPRESSOR switch is placed in the Stop Reset O position LCSSS HIGH PHASE X HEATSINK TEMPERATURE RUNNING The Liquid Cooled Solid State Starter Logic Trigger Board has detected the temperature of phase A B or C designed as X in the message Silicon Controlled Rectifier SCR Modules has exceeded 100 C 212 F while the chiller was running The safety can be reset after all SCR temperatures are lt 98 9 C 210 F and the COMPRESSOR switch is placed in the Stop Reset position O However the chiller cannot be started until all SCR temperatures are lt 42 8 C 109 F During the shutdown the starter cooling pump runs until the temperature is lt 42 8 C 109 F 66 LCSSS 105 MOTOR CURRENT OVERLOAD The highest phase of the compressor motor current increased to gt 105 of the programmed 100 chiller Full Load Amps continuously for 40 seconds The chiller can be started after the COMPRESSOR switch is placed in the Stop Reset
44. are bypassed until the standby chiller has been shutdown for at least this amount of time Service technicians refer to YORK Service Manual 160 80 M1 22 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen 2 9 COMPRESSOR SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL COMPRESSOR SCREEN 1098 4 kPaD Differential UJ Pressure 53 4 C Onl Nemperanine 54 5 C Discharge lemperain 4 0 C Suction Superheat 16 6 paka Superneat 449 Al 449 Al 464A 23 Full toad Amps Oil Retum Solenoid Slide Valve Control Mode Auto Krym Unio ESA Minimum Slide Valve Position 0 FIG 7 COMPRESSOR SCREEN OVERVIEW This screen displays a cutaway view of the chiller compressor revealing the rotary screw and shows all conditions associated with the compressor The slide valve positioning is animated and with the proper Access Level it can be manually controlled Animation of the compressor rotors indicates whether the chiller is presently in a RUN condition This screen also serves as a gateway to sub screens for calibrating the slide valve or configuring the optional Hot Gas Bypass DISPLAY ONLY Differential Oil Pressure Displays the pressure differential between the oil pressure transducer input to the compressor and the evaporator pressure transducer The displayed value includes the offset pressure derived from auto zeroing durin
45. arted due to the reason displayed on the Details Line of the Status bar SLIDE VALVE CLOSING BEFORE SHUTDOWN To assure the Slide Valve unloads to lt 30 position during shutdown it is unloaded to lt 30 prior to shutting down the chiller on certain shutdowns While the chiller is running if one of the below listed shutdown commands occur and the slide valve position is gt 30 a continuous unload signal is applied to the slide valve until its position is lt 30 While the slide valve is unloading this status message is displayed The event that caused the shutdown is displayed on the Details Line When the slide valve position becomes lt 30 the chiller shuts down and the normal 2 minute lockout period begins The shutdown commands that initiate this operation are e MULTIUNIT CYCLING CONTACTS OPEN e SYSTEM CYCLING CONTACTS OPEN e REMOTE STOP e LEAVING CHILLED LIQUID LOW TEMPERATURE e CONTROL PANEL SCHEDULE To assure that a defective slide valve actuator or mechanical problems cannot prevent a chiller shutdown if the slide valve has not unloaded to lt 30 within 210 seconds of receiving the shutdown command a shutdown occurs regardless of slide valve position If the chiller start is initiated and the slide valve is still gt 30 the START INHIBIT status message is displayed and the message SLIDE VALVE POSITION gt 30 is displayed on the detail line SYSTEM LOCKOUT DELAY Anytime the chiller
46. 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 Optiview Control Center is equipped with the 031 01730 000 Microboard for which the program resides in a replaceable Flash Memory Card The software version is printed on a label adhered to card Program can be upgraded by replacing the card YNWS 02 GCE 09 09 il YORK OPTIVIEW CONTROL CENTER N TE FIG 2 CONTROL CENTER 2 2 CONTROL CENTER 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 redefined based on the currently displayed screen Eight buttons are available on the ri
47. calculated as lave la lb lc 3 The imbalance is calculated as la lave Ib lave Ic lave 2 lave x 100 The Style B Solid State Starter detects the unbalance condition and advise the Optiview Control Center Microboard via serial communications This safety shutdown is not performed on Electro mechanical starter applications 65 YNWS 02 GCE 09 09 WATCHDOG SOFTWARE REBOOT The Micro Board s software Watchdog initiated a Microprocessor reset because it detected that a portion ofthe chiller operating Program was not being executed The result of this reset is a Safety shutdown and re initialization of the Program This is generally indicative of a severe electrical power disturbance or impending Micro Board Failure The chiller can be started after the COMPRESSOR switch is placed in the Stop Reset O position MOD B SOLIDSTATE STARTER SAFETY SHUTDOWN MESSAGES LCSSS SHUTDOWN REQUESTING FAULT DATA The Liquid Cooled Solid State Starter Logic Trigger Board has shut down the chiller but the Control Center has not yet received the cause of the fault from the LCSSS via the serial communications link The LCSSS shuts down the chiller by opening the Motor Controller LCSSS Stop Contacts K1 relay located on the Logic Trigger Board and connected between TB6 16 and TB6 53 in the Control Center The Micro Board in the Control Center then sends a request for the cause of the fault to the Logic Trigger Bo
48. ccurred while the chiller was running it will automatically restart when power is restored This message can indicate a Cycling auto restart after power failure or Safety manual restart after power failure shutdown depending upon Control Center configuration It indicates a cycling shutdown when displayed in orange characters Safety shutdown when displayed in red characters The Control Center is configured for auto restart or manual restart after power failure by a qualified Service Technician following instructions in YORK Service Manual 160 80 M1 LEAVING CHILLED LIQUID LOW TEMPERATURE The Leaving Chilled Liquid Temperature has decreased to the programmed Shutdown Temperature Setpoint If the chiller is running when this occurs the Slide Valve is fully unloaded prior to shutting down the chiller The chiller will automatically restart when the temperature increases to the programmed Restart Temperature Setpoint LEAVING CHILLED LIQUID FLOW SWITCH OPEN The Chilled Liquid Flow Switch has remained open for 2 continuous seconds while the chiller was running or failed to close during the Start Sequence Initiated period The chiller will automatically restart when the flow switch closes CONDENSER FLOW SWITCH OPEN The Condenser water flow switch has remained open for 2 continuous seconds while the chiller was running This check is bypassed for the first 30 seconds of System Run The chiller will automatically re
49. clears the graph starts a new graph sets the time of day to the present clock time and begins the trending This key is only available if trending is stopped Ifthe selected Chart Type is TRIGGERED and TRIGGER ACTION is set to START data collection will not begin until the Triggers have been satisfied and any selected TRIGGER DELAY has elapsed Otherwise data collection will begin immediately Stop Access Level Required OPERATOR Pressing this key stops the trending The trend data is frozen on the display until another graph is started with the START key The STOP key is only available if trending is running Data Select Access Level required VIEW Allows the user to display all trended data points simultaneously or select a single trended data point for display hiding the other data points Selections are ALL DATA or DATA POINT X 1 6 Print Access Level Required VIEW Allows the data on the trend screen to be printed in tabular format If set to EXISTING a snapshot of the data presently on the screen is sent to the printer If set to NEW all data collected after pressing this key will be sent to the printer as it is collected If set to DISABLED no data is sentto the printer Refer to PRINTERS section of this book for printout example YNWS 02 GCE 09 09 Y Axis Access Level Required VIEW This key toggles the Y Axis labels of the graph Each key press changes the label to another of the selected parameters X A
50. cription DATE ME co 27 Aug 2004 ro L Service YNWS 02 GCE 09 09 Home Security Log SSS Full Load Amps dine Date Access level User Id 15 11 08 24 Aug 2004 Service oW Vave New Value 676 A 678 A FIG 24 SECURITY LOG DETAILS OVERVIEW This screen allows the user to view the details of a logged setpoint change selected from the list on the Security Log Screen The date and time the setpoint was changed the new and old setpoint value and access level and user ID used to make the change are displayed The data on this screen can be printed Note Requires a login access level of SERVICE DISPLAY ONLY Description Displays the setpoint category that was changed Time Displays the time the setpoint was changed Date Displays the date the setpoint was changed Access Level Displays the Login Access Level used to make the setpoint change User ID Displays the User ID used to make the setpoint change Print Old Value Displays the previous setpoint value New Value Displays the value entered at the time of the setpoint change PROGRAMMABLE Print Generates a report of change parameters displayed on this screen NAVIGATION Home Access Level Required SERVICE Causes an instant return to the Home Screen Security Log Access Level Required SERVICE Causes an instant return to the Security Log Screen 47 YNWS 02 GCE 09 09 2 27 CUSTOM VIEW SCREEN SYSTEM STAT
51. ct Is MultiUnit Cycling Closed Setpoint 283 External Contact Is Remote Cycling Closed 1807 Return Chilled Liquid Temperature 284 External Contact Is Auxiliary Safety Open 1808 Evaporator Pressure 285 Dipswitch Is Anti Recycle Enabled 1809 Evaporator Saturation Temperature 287 Dipswitch Is Diagnostics Enabled 1810 Evaporator Small Temperature Difference 288 Jumper Liquid Type 1811 Evaporator Is Refrigerant Sensor Present 289 Dipswitch Chilled Liquid Pump Operation 1812 Evaporator Refrigerant Temperature 290 Jumper Motor Type 1813 Evaporator Delta P P 291 Dipswitch Power Failure Restart 1815 Smart Freeze Protection Is Control Enabled 293 Jumper Refrigerant Selection 1818 Leaving Chilled Liquid Remote Digital Temperature 304 Options Control Mode Setpoint 305 Options System Language 2048 Leaving Condenser Liquid Temperature 306 Options Chiller ID Number 2049 Leaving Condenser Liquid Is Flow Switch Closed 307 Options Display Mode 2050 Leaving Condenser Liquid Is Pump On 336 Security Log In Level 2051 Return Condenser Liquid Temperature 337 Security Log In User ID 2052 Condenser Pressure 512 Sched Is Schedule Enabled 2053 Condenser Saturation Temperature 1296 Discharge Temperature 2054 Condenser Small Temperature Difference 1298 Discharge Superheat Temperature 2057 Condenser Is High Pressure Switch Closed 1543 Oil Return Solenoid Is Solenoid On 2058 Co
52. ctable control sources that can be used to set the minimum allowed Slide Valve position a Slide Valve This method limits the minimum Slide Valve position to a programmed value 0 to 70 based on the position feedback potentiometer after the chiller has been running for 3 minutes When the Slide Valve unloads to the programmed value no more unload pulses will be applied If it decreases to lt programmed value a 1 second load pulse is applied every 3 seconds until the Slide Valve position is gt programmed value b Motor FLA This method limits the Slide Valve minimum position to one that will maintain the compressor motor current above the programmed Minimum Load FLA 15 to 70 FLA Setpoint after the chiller has been running for 3 minutes When the Slide Valve unloads to the point where the motor current decreases to the Minimum Load FLA Setpoint no more unload pulses will be applied If it unloads to the point where the motor current is lt Minimum Load FLA Setpoint a 1 second load pulse is applied every 3 seconds until the motor current is gt the Minimum Load FLA Setpoint Service Technicians refer to YORK Service Manual 160 80 M1 Minimum Slide Valve Position Access Level Required SERVICE Only displayed if Slide Valve is selected as the Minimum Load Control Source Allows the user to set the minimum Slide Valve position between 0 and 70 The default value is 0 Minimum Load FLA Access Level Required S
53. ctivated the chiller is permitted to ride through these temporary conditions The basis of this feature is that the chilled liquid contains a certain amount of heat that cannot be eliminated immediately It requires a certain amount of time for solidification to occur During this period of time the Evaporator Refrigerant Temperature is used as one of the variables to determine when solidification will occur and an appropriate Low Evaporator Temperature shutdown threshold is applied This threshold could be lower but not higher than the YNWS 02 GCE 09 09 normal Safety threshold This feature also allows the Leaving Chilled Liquid Temperature Setpoint to be set as low as 2 2 C 36 0 F If set to lt 3 3 C 38 0 F the Low Chilled Liquid Temperature Cycling shutdown threshold becomes a minimum of 1 1 C 34 0 F After being enabled by a Service technician Smart Freeze is activated when the leaving Chilled Liquid Temperature is set to lt 3 3 C 38 0 F Once activated the total number of seconds the Evaporator Refrigerant Temperature is below the freeze threshold is counted If this accumulated time exceeds the maximum allowed a safety shutdown is performed and EVAPORATOR LOW PRESSURE SMART FREEZE is displayed Smart Freeze cannot be used in Brine cooling mode A complete description of this feature is contained in YORK Service Manual 160 80 M1 An optional Hot Gas Bypass system allows the chiller to remain running during e
54. dicates 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 lt or gt symbols will be displayed beside the minimum or maximum value respectively ANALOG INPUT METRIC RANGE ENGLISH RANGE LOW HIGH UNITS Leaving Chilled Liquid Temperature 6 0 82 0 F Return Chilled Liquid Temperature 6 0 82 0 F Leaving Condenser Liquid Temperature 8 0 133 5 F Return Condenser Liquid Temperature 8 0 133 5 UE Discharge Temperature 31 8 226 3 F Suction Temperature 18 0 82 0 F Oil Temperature 31 8 226 3 F Condenser Pressure 0 0 315 0 PSIG Condensing Temperature 52 1 118 9 sF Evaporator Pressure 0 0 215 0 PSIG Evaporating Temperature 52 1 91 8 E Oil Pressure 0 0 315 0 PSIG Filter Oil Pressure 0 0 315 0 PSIG Saturation temperatures are calculated values They will display XXX if the pressure used for the calculation is out of range 13 YNWS 02 GCE 09 09 2 5 HOME SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAVING CHILLED LIQUID CONTROL HOME SCREEN m Oca d Amps 60 input Rowen 271 KW Operating Hours 25 Hr Motor Run Chilled Liquid Temperature Leaving Return 12 8 C FIG 3 HOME SCREEN 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
55. e Remote stop e Leaving Chilled Liquid Low Temperature e Control Panel Schedule In multiple chiller applications it may be possible for the chilled liquid Water or Brine from an operating chiller to flow through the Evaporator of a standby chiller This represents a possible freeze threat to the Condenser of the standby chiller The Standby Chiller Freeze Protection feature minimizes this freeze potential by allowing the OptiView Control Center of the standby chiller to cycle the Condenser Pump based on the standby chillers Condenser Saturation Temperature while it is shutdown At chiller shutdown the pump runs until the condenser saturation temperature increases to gt 1 7 C 35 0 F whereupon the pump is turned off While the chiller is shutdown the condenser saturation temperature is monitored If it decreases to lt 1 1 C 30 0 F the pump is turned on and runs until the temperature increases to gt 1 7 C 35 0 F After the chiller has been shutdown for at least the time delay programmed as the Freeze time Setpoint and the temperature decreases to lt 2 2 C 28 0 F WARNING FREEZE THREAT FROM OPERATING CHILLER is displayed and alarm output is activated When the temperature increases to 2 2 C 28 0 F the warning message and alarm output automatically clear If this feature is desired Freeze Warning must be enabled by a Service Technician A complete description of this feature is contained in the Y
56. e pressing the Slide Valve Load key in Service access level starts a 10 minute timer during which the current limit thresholds are elevated Refer to the following table Slide Valve Motor Current FLA Control All Other Modes Service Mode On rise inhibit load 100 107 On fall allow load 98 106 On rise start unload 104 110 On fall stop unload 102 109 An example of current limit is as follows chiller FLA is 100 Amps and the Current Limit Setpoint is 50 the following will occur 50 Amps inhibit slide valve load 52 Amps slide valve begins unloading 51 Amps slide valve stops unloading 49 Amps allow automatic slide valve control MAXIMUM LOAD LOAD LIMIT Displayed if the special Maximum Load Limit Setpoint is limiting the Slide Valve loading This special setpoint is used to prevent overloading the Oil Separator on certain compressor chiller combinations operating at extreme conditions It limits the compressor motor current to 60 to 100 as programmed until the Leaving Chilled Liquid Temperature is lt 10 0 C 50 0 F to 21 1 C 70 0 F as programmed after 3 minutes of operation Service Technicians refer to YORK Service manual 160 80 M1 MINIMUM LOAD LOAD LIMIT Displayed while Slide Valve unloading is being limited by the selected control source Slide Valve or Motor FLA If Slide Valve is selected the minimum allowed slide valve position is programmed between 0
57. e refrigerant vapor causing it to condense The condenser YNWS 02 GCE 09 09 water is supplied to the chiller from an external source usually a cooling tower The condensed refrigerant drains from the condenser into the liquid return line where the expansion valve meters the flow of liquid refrigerant to the evaporator 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 1 2 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 evaporator A slide valve arrangement located on the rotary screw compressor compensates for various load conditions The slide valve arrangement is controlled by the OptiView Control Center and unit controls that sense the building load conditions The control center sends signals to the solenoid valve that loads and unloads the slide valve with the use of compressor oil under hydraulic pressure A cylinder located in the inlet end of the compressor houses a spring loaded shaft and pistons slide valve which is fed through its ports by pressurized compressor oil The flow of the oil is controlled by the equalizing solenoid
58. e is used to determine a low line and high line voltage threshold for initiating a shutdown Service Technicians refer to YORK Service Manual 160 80 M1 Starting Current Access Level Required SERVICE Defines the maximum allowed motor starting amps The Solid State Starter will limit the motor starting current to this value Service Technicians refer to YORK Service Manual 160 80 M1 32 Open SCR Enabled Disabled Access Level Required SERVICE Allows the user to enable or disable the Solid State Starter Open SCR safety detection This must never be disabled unless under advisement of the YORK Factory Service Technicians refer to YORK Service Manual 160 80 M1 Shorted SCR Enabled Disabled Access Level Required SERVICE Allows the user to enable or disable the Solid StateStarter Shorted SCR safety detection This must never be disabled unless under advisement of the YORK Factory Service Technicians refer to YORK Service Manual 160 80 M1 KWH Reset Access Level Required SERVICE Allows the user to reset the cumulative Kilowatt Hours Service Technicians refer to YORK Service Manual 160 80 M1 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen 2 15 SETPOINTS SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL SETPOINTS SCREEN Leaving Giilled ELI EW UZ JE Setpoint 7 2 C Remote Range 5 6 C Leaving Ciilled Liquid Temperature Cycling
59. e 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 12 Home Screen page 14 System Screen page 16 Evaporator page 18 Condenser page 21 Compressor page 23 F Hot Gas Bypass page 26 Slide Valve Calibration page 27 Oil Sump Separator page 28 Motor page 30 F EM Starter Version page 30 Mod B Solid State Starter page 31 Setpoints page 33 L Setup page 35 Schedule page 37 User page 39 Comms page 40 Printer page 41 Sales Order page 42 Operations page 43 Diagnostics Refer to YORK Service Manual 160 80 M1 History page 45 History Details page 45 Trend page 50 Trend Setup page 52 Advanced Trend Setup page 54 Common Slots page 56 Custom View page 48 L Custom View Setup page 49 Security Log page 46 L Security Log Details page 47 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 are available English is the default language If a language other than English is being displayed an 2 4 ANALOG INPUT RANGES YNWS 02 GCE 09 09 English only speaking person should navigate to the USER Screen using the preceding Navigation chart and select English per the USER Screen instructions in this book The following table in
60. e of the refrigerant in its gaseous state at discharge of the compressor as it travels to the condenser Oil Temperature Displays the temperature of the oil in the sump Discharge Superheat Displays the temperature differential between the Discharge Temperature and the Condenser Saturation Temperature Oil Pressure Displays the pressure of the oil at the input to the compressor Filter Pressure Displays the pressure of the oil at the input to the filter Condenser Saturation Temperature Displays the saturation temperature in the condenser Condenser Pressure Displays the refrigerant pressure in the condenser 28 Evaporator Pressure Displays the present refrigerant pressure in the evaporator Seal Pressure Not used Differential Oil Pressure Displays the pressure differential between the oil pressure as sensed at the input to the compressor and the evaporator pressure If either of the transducers used to calculate this differential is out of range the display field will show XX X The displayed value includes the offset pressure that is derived during the first 15 seconds of Start Sequence Initiated Refer to the following explanation of offset pressure Differential Oil Pressure Seal Oil Pressure Evaporator Pressure Offset Pressure Differential Filter Pressure Displays the pressure differential between the input to the oil filter and the input to the compressor This value is used to check for
61. e serious damage to property or injury to persons 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 office 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 modified and if current literature is available YNWS 02 GCE 09 09 Table of Contents 1 DESCRIPTION OF SYSTEM AND FUNDAMENTALS OF OPERATION 1 1 1 2 1 3 System Operation Description Capacity Control Chiller Operation Overview 2 OPTIVIEW CONTROL CENTER 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 2 14 2 15 Introduction Control Center Interface Conventions Analog Input Ranges Home Screen System Screen Evaporator Screen Condenser Screen Compressor Screen Hot Gas Bypass Screen Slide Valve Calibration Screen Oil Separator Screen Electro Mechanical Starter Screen Mod
62. ed and the COMPRESSOR switch is placed in the STOP RESET O position LCSSS HIGH TEMPERATURE PHASE X STOPPED The chiller is stopped and the Liquid Cooled Solid State Starter Logic Trigger Board has detected that the temperature of phase A B or C designated as X in this message Silicon Controlled Rectifier SCR module is gt 43 3 C 110 F The starter cooling pump will run and the chiller will be inhibited from starting until the temperature decreases to lt 42 8 C 109 F WARNING MESSAGES WARNING REAL TIME CLOCK FAILURE During the initialization process that occurs when power is applied to the Control Center test data is written to a location in the BRAM battery backed memory device IC location U52 on Micro Board This data is then read from the BRAM and compared to the test data If the read data is not the same as that which was written to the device it is assumed the BRAM and Real time Clock operation is defective and this message is displayed The BRAM should be replaced by a qualified Service Technician This message automatically clears when the BRAM problem has been solved WARNING SETPOINT OVERRIDE A blank BRAM battery backed memory device IC location U52 on Micro Board or a failure of this device was detected during the initialization process that occurs when power is applied to the Control Center Due to this failure any or all of the programmed Setpoints could have been corrupted Ther
63. efore all Setpoints have been automatically changed to their Default values All Setpoints will have to be programmed to their desired values This message will clear when the WARNING RESET key is pressed in OPERATOR or higher access mode WARNING CONDENSER HIGH PRESSURE LIMIT The Condenser Pressure exceeds the High Pressure Warning Setpoint threshold programmed by a Service technician logged in at SERVICE access level While this condition is in effect the Slide Valve is inhibited from further loading This message automatically clears and the Slide Valve is permitted to load when the Condenser pressure decreases to 35 5 kPaG 5 PSIG below the Setpoint WARNING EVAPORATOR LOW PRESSURE LIMIT The Evaporator pressure has decreased to the Warning threshold This threshold is a fixed amount 13 kPaG 1 9 PSIG above the programmable safety shutdown threshold While this condition is in effect the Slide Valve is inhibited from further loading This message automatically clears and the Slide Valve is permitted to load when the Evaporator pressure increases to the reset value This reset value is a fixed amount 22 kPaG 3 2 PSIG above the programmable safety shutdown threshold WARNING FREEZE THREAT FROM OPERATING CHILLER Displayed after the chiller has been shutdown for at least the amount of time programmed as the Freeze Warning Bypass Setpoint programmed by a Service technician logged in at Service access lev
64. efrigerant Enabled FIG 5 EVAPORATOR SCREEN OVERVIEW This screen displays a view of the chiller evaporator All setpoints relating to the evaporator side of the chiller are maintained on this screen DISPLAY ONLY Chilled Liquid Flow Switch Open Closed Displays whether the liquid flow 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 Small Temperature Difference Displays the difference between the Leaving Chilled Liquid Temperature and the Evaporator Saturation Temperature 18 Suction Temperature Displays the temperature of the refrigerant at suction of the compressor Suction Superheat Displays the suction superheating temperature for setting the expansion valve It is calculated between Evaporator Saturation Temperature and Suction Temperature Leaving Chilled Liquid Temperature Setpoints Setpoint Displays the present setpoint to which the chiller is operating whether controlled locally or remotely This value c
65. el and the Condenser Saturation Temperature decreases to lt 2 2 C 28 F When the temperature increases to gt 2 2 C 28 F the warning message clears WARNING FREEZE THREAT CONDENSER FLOW SWITCH OPEN If the Standby Chiller Freeze Protection is enabled the Control Center operates the Condenser Water Pump during Freeze Threat situations while the chiller is shutdown This message is displayed if the Condenser Water Flow Switch does not close within 60 seconds of condenser pump start or it opens for 2 continuous seconds after the 60 second start bypass This message will clear when the WARNING RESET key is pressed in OPERATOR or higher access level YNWS 02 GCE 09 09 WARNING OIL DIRTY FILTER Displayed if the oil filter differential pressure exceeds 137 9 kPaD 20 PSID for 8 continuous seconds This message automatically clears when the condition clears WARNING OIL HIGH TEMPERATURE Displayed when the oil temperature rises to 73 9 C 165 F This message automatically clears when the temperature decreases to lt 71 1 C 160 F WARNING SLIDE VALVE UNCALIBRATED The slide valve position potentiometer calibration has not yet been performed This message automatically clears when the calibration has been performed ROUTINE SHUTDOWN MESSAGES REMOTE STOP Ashutdown command has been received from a remote device Remote Stop commands can be received in Digital Remote mode via I O Boa
66. el Required SERVICE Allows the user to enable or disable the transducer auto zeroing that is used to calculate the offset pressure Refer to the description of the Offset Pressure Service Technicians refer to YORK Service Manual 160 80 M1 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen 29 YNWS 02 GCE 09 09 2 13 ELECTRO MECHANICAL STARTER SCREEN SYSTEM STATUS DATE TIME CONTROL SOURCE SYSTEM RUN 27 Aug 2004 12105 Loca YSTEM DETAILS LEAVING CHILLED LIQUID CONTROL Service CREEN ELECTRO MECHANICAL STARTER EMS SCRE Home Local Motor Current Limit 100 100 Pulldown Demand Limit e k Pulldown Demand Time 0 Min 3 FIG 11 ELECTRO MECHANICAL STARTER SCREEN OVERVIEW This screen displays all information pertaining to an Electro Mechanical Starter DISPLAY ONLY Motor Run LED Indicates whether the digital output from the controls is commanding the motor to RUN Motor Current Full Load Amps Displays the motor current as a percentage of the Full Load Amps FLA value For the Electro Mechanical Starter this is the data returned by the CM 2 board Current Limit Setpoint Displays the current limit value in use This value could come from a 0 20mA 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 Pulldown Demand Time Left Displa
67. emote Microgateway device in ISN Remote mode can define the setpoint through a serial data stream In this case the incoming setpoint is not an offset that is applied to this locally programmed Base setpoint value but rather is the setpoint value itself 19 YNWS 02 GCE 09 09 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 defining an offset below the Leaving Chilled Liquid Temperature setpoint It is programmable over a range of 0 6 C 1 F to 28 2 C 50 8 F below the setpoint to a minimum cutout of 2 2 C 36 F water 1 1 C 34 F water with Smart Freeze enabled or 22 2 C 8 F brine It establishes the minimum allowable temperature for the Leaving Chilled Liquid Temperature and prevents over cooling of the building Anytime the Leaving Chilled Liquid Temperature setpoint is increased the shutdown threshold is 2 2 C 36 0 F water or 22 2 C 8 0 F brine for the next ten 10 minutes If Smart Freeze see below is enabled the threshold is 1 1 C 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 O
68. er Temperature Phase A B C Displays the temperatures of the Silicon Controlled Rectifier assemblies PROGRAMMABLE Local Motor Current Limit Access Level Required OPERATOR Allows the user to specify the maximum allowed motor current as a percentage of FLA When the motor current reaches this value the slide valve will not be permitted to load further If the motor current rises above this value the slide valve will unload to reduce the current to this value 31 YNWS 02 GCE 09 09 Pulldown Demand Limit Access Level Required OPERATOR Allows the user to specify the current limit value as a percentage of FLA to which the chiller will be limited during the specified pulldown limit time This value will override the Motor Current Limit value during this time period This function is used to provide energy savings following chiller start up Pulldown Demand Time Access Level Required OPERATOR Allows the user to set a period of time for which the pulldown demand limit will be in effect after the chiller starts Full Load Amps Access Level Required SERVICE Defines the maximum amps at which the motor can operate This value is viewable when logged in under the Operator or View access level Service Technicians refer to YORK Service Manual 160 80 M1 Voltage Range Access Level Required SERVICE Allows the user to select specific line voltage range for voltage checking When not disabled this line voltage rang
69. er Logging Disabled Log Start Time Output Interval 60 Min Okidata Printer Type Print Report Access Level Required OPERATOR Select the report type to print when the Print Report key is selected This can vary from Status report present system parameters Setpoints report present value of the system setpoints Schedule report present value of the system schedule times or a Sales Order Data report information provided on the Sales Order screen A print report is generated upon completion of selection Print All Histories Access Level Required OPERATOR Generate a report of the system data at the time of all stored shutdowns NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Return to the Setup Screen 41 YNWS 02 GCE 09 09 2 21 SALES ORDER SCREEN SYSTEM STATUS SYSTEM RUN VETEM DETAILS LEAVING CHILLED LIQUID CONTROL SALES ORDER SCREEN Gray intoinanon ommesionng Dates 00 000 0000 Job Name Job llocaton Model Number York Urder Number Panel Senal Number Chiller Sena Number Design load Evaporator Eondenser Passes Design Working Pressure Foulmg Factor Pressure Drop pel NozdeAnangementin Kozje Arrangement Gut Leaving Temperature Betim lemperatire GEH Tubes FIG 19 SALES ORDER SCREEN OVERVIEW This screen allows definition of the sales order parameters The Commissioning date is en
70. essing 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 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 YNWS 02 GCE 09 09 NAVIGATION System Used to provide additional system information Evaporator A detailed view of all evaporator parameters including the programmable Leaving Chilled Liquid Setpoints Condenser A detailed view of all condenser parameters Compressor A detailed view of all the compressor parameters This includes slide valve control and Hot Gas Bypass Control and slide valve calibration Oil Sump A detailed view of all the oil sump parameters This includes the Seal Lubrication functionality Motor A detailed view of the motor controller parameters specific to the controller type presently utilized o
71. estart value of 26 7 C 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 34 Remote Analog Input Range Access Level Required OPERATOR This setpoint defines for the Control Center the remote signal range applied for remote reset of the Leaving Chilled Liquid Temperature Setpoint and Current Limit Setpoint in ANALOG remote mode If the remote signal is 0 10VDC or 0 20mA this setpoint must be programmed for 0 10VDC If the remote signal is 2 10VDC or 4 20mA this setpoint must be programmed for 2 10VDC Local Motor Current Limit Access Level Required OPERATOR Allows the user to specify the maximum allowed motor current as a percentage of FLA When the motor current reaches this value the slide valve will not be permitted to load further If the motor current rises above this value the slide valve will unload to reduce the current to this value Pulldown Demand Limit Access Level Required OPERATOR Allows the user to specify the current limit value as a percentage of Full Load Amps to which the chiller will be limited during the specified pulldown limit time This value will override the Motor Current Limit value during this time period This function is used to provide energy savings following chiller startup Pulldown Demand Time Access Level Required OPERATOR Allow
72. filter clogging If either of the transducers used to calculate this differential is out of range the display field will show XX X The displayed value includes the offset pressure that is derived during the first 15 seconds of Start Sequence Initiated Refer to the following explanation of offset pressure Differential Filter Pressure Filter Pressure Oil Pressure Offset Pressure Offset Pressure The Offset Pressure is a calculated value that is used to calculate the differential pressure The Offset Pressure is the pressure differential between the corresponding transducers during the first 15 seconds of START SEQUENCE INITIATED This is the transducer auto zeroing During this time the transducers will be sensing the same pressure and their outputs should be equal However due to accuracy tolerances in transducer design differences can exist Therefore to compensate for differences between transducers and assure differential pressure sensing accuracy the Offset Pressure is subtracted from the differential pressure Certain operating conditions could require the auto zeroing to be disabled This must never be done by anyone other than a qualified service technician Oil Return Solenoid LED Indicates whether the solenoid is energized Low Separator Oil Level LED The oil level indicator in the separator is detecting a low oil level YNWS 02 GCE 09 09 PROGRAMMABLE Auto Zero Enabled Disabled Access Lev
73. 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 lt 4 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 Start Sequence Initiated cycle e RUN I 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 2 3 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
74. format as selected with the X axis toggle key The Y Axis is scaled for each parameter per the selected minimum and maximum value for each parameter Analog parameters are scaled in pressure temperature volts amps hertz or time Digital on off parameters are scaled as zero off and one on Only one Y Axis label is displayed at a time The Y Axis Toggle Key is used to toggle the Y Axis labels through the different parameters The Y Axis label that is being displayed is identified at the top of the graph For identification each plotted parameter and associated Y Axis labeling is color coordinated The DATA SELECT key is used to display all trended Data Points simultaneously or select a single Data Point for display The parameters are sampled at the selected Data Collection Interval and plotted using 450 data points across the X Axis If the actual value of the sampled parameter is less than the Y Axis label minimum for that parameter the value will be plotted at the minimum value Similarly if the actual value is greater than the Y Axis label maximum for that parameter the value will be plotted at the maximum value There are three types of charts that can be created ONE SCREEN CONTINUOUS or TRIGGERED When plotting reaches the end of the X axis if ONE SCREEN is selected 50 Stop Print ie Disabled Data Select Data Point 1 Y Axis X Axis trending stops and data is frozen If CONTINUOUS is selected
75. g messages Yellow Cycling Shutdown messages Orange Safety Shutdown messages Red Note that there are three types of shutdowns If the chiller shuts down on a CYCLING shutdown it will automatically restart when the condition that caused the shutdown no longer exists SAFETY shutdowns require the operator to perform a manual reset at the keypad A NORMAL shutdown occurs from a properly requested or scheduled shutdown The event that caused the shutdown is displayed on the Details Line STATUS MESSAGES SYSTEM READY TO START The chiller is shut down but will start upon receipt of a Local or Remote start signal CYCLING SHUTDOWN AUTO RESTART The chiller is shut down on a CYCLING shutdown The cause of the shutdown is still in effect and is displayed on the Details line of the Status Bar The chiller will automatically restart when the CYCLING condition clears SAFETY SHUTDOWN MANUAL RESTART The chiller is shut down on a SAFETY shutdown The cause of the shutdown is still in effect and is displayed on the Details line of the Status Bar The chiller can be started after the Safety condition clears and the Operator moves the COMPRESSOR switch to the STOP RESET O position START SEQUENCE INITIATED A chiller start has been initiated SYSTEM RUN The chiller is running under the condition described in the Details Line of the Status Bar YNWS 02 GCE 09 09 START INHIBIT The chiller is prevented from being st
76. g the START SEQUENCE INITIATED If either of the transducers used to calculate this differential is out of range the display field will show XX X Differential Oil Pressure Oil Pressure Evaporator Pressure Offset Pressure The Offset Pressure is used to calculate the differential pressure The Offset Pressure is the pressure differential between the oil pressure transducer and the evaporator pressure transducer during the first 15 seconds of START SEQUENCE INITIATED This is the transducer auto zeroing During this time the transducers will be sensing the same pressure and their outputs should be equal However due to accuracy tolerances in DATE TME CONTROL SOURCE 27 Aug 2004 lissa Loca Local 25 Slide Valve Position 8 2 C Suction Temperature YNWS 02 GCE 09 09 Home REP Hot Gas Slide Valve Calibration Maximum Load Temperature 21 1 C Maximum Load FLA 100 Minimum Load Control Source Slide Valve transducer design differences can exist Therefore to compensate for differences between transducers and assure differential pressure sensing accuracy the Offset Pressure is subtracted from or added to the differential pressure Certain operating conditions could require the auto zeroing to be disabled This must never be done by anyone other than a qualified service technician The offset pressure calculation will not be performed if either transducer is out of range The offset value will be taken
77. ght 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 10 The Start Stop control is operated via a three position switch When toggled all the way to the right it is considered in the STOP RESET position When in the 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 e 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 In addition the switch must be placed in this state
78. hed if the Control Center does not receive a reply within 10 consecutive attempts a Cycling shutdown is performed and this message is displayed This same Cycling shutdown is performed along with the same message if the Liquid Cooled Solid State Starter does not receive a response from the control center after 10 consecutive attempts to communicate with the Control Center after INITIALIZATION has been successfully completed The Control Center attempts to establish communications until successful LCSSS SHUTDOWN REQUESTING FAULT DATA The Liquid Cooled State Starter Logic Trigger Board has shut down the chiller but the Control Center has not yet received the cause of the fault from the LCSSS via the serial communications link The LCSSS shuts down the chiller by opening the Motor Controller LCSSS Stop Contacts K1 relay located on the starter Logic Trigger Board and connected between TB6 16 and TB6 53 in the Control Center The Micro Board in the Control Center then sends a request for the cause ofthe fault to the Logic Trigger Board over the serial communications link Since serial communications are initiated every 2 seconds this message is typically displayed for a few seconds and then replaced with one of the following fault messages LCSSS STOP CONTACTS OPEN Refer to LCSSS SHUTDOWN REQUESTING FAULT DATA above If the Control Center s Micro Board does not receive the cause of a starter initiated shutdown with
79. ice Setup Printer Setup COM 2 Setup Party None Stop bits 1 Bit FIG 17 COMMS SCREEN OVERVIEW This screen allows definition of the necessary communications parameters Presently there are no COM 2 communications features available DISPLAY ONLY None PROGRAMMABLE Chiller ID Access Level Required OPERATOR Define the numeric chiller ID when used within an ISN network of chillers This ID number is also printed at the top of reports obtained with a local printer Printer Setup and COM 2 Setup Access Level Required OPERATOR Pressing either key places a green selection box around the first changeable parameter Use the A and W keys to place the selection box around the desired parameter to be changed With the selection box around the desired parameter press the ENTER v key A dialog box is displayed permitting data entry Printer Baud Rate Define the baud rate at which the panel shall communicate to the printer Printer Data Bit s Define the number of data bits with which the panel shall communicate to the printer 40 Chiller ID Printer Parity Bit s Define the number of parity bits with which the panel shall communicate to the printer Printer Stop Bit s Define the number of stop bits with which the panel shall communicate to the printer COM 2 Baud Rate Define the baud rate at which the panel shall communicate through the modem port COM 2 Data Bit s Define the number of data
80. ing 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 2 2 C 4 F below the Leaving Chilled Setpoint The displayed value is the difference between the present Leaving Chilled Liquid Temperature setpoint and the setpoint entered for the Leaving Chilled Liquid Temperature Cycling Offset Shutdown Leaving Chilled Liquid Temperature Setpoints Shutdown Offset Displays the offset below the Leaving Chilled Liquid Temperature setpoint at which the chiller will shutdown to avoid over cooling This is the Leaving Chilled Liquid Temperature Cycling Shutdown setpoint See the description in the following section of programmable setpoints Leaving Chilled Liquid Temperature Setpoints Restart Displays the Leaving Chilled Liquid Temperature at which the chiller will restart after it has shut down to avoid over cooling By default the chiller will restart at the Leaving Chilled Liquid Temperature Setpoint The displayed value is the difference between the present Leaving Chilled Liquid Temperature setpoint and the setpoint entered for the Leaving Chilled Liquid Temperature Cycling Offset Restart If Ice Storage is On and the Leaving Chilled Liquid Temperature Setpoint is lt 0 C 32 F the Restart Temperature is the value programmed as the Ice Storage Restart Temperature Leaving Chilled L
81. iquid Temperature Setpoints Restart Offset Displays the offset above the Leaving Chilled Liquid Temperature setpoint at which the chiller will restart after it has shut down to avoid over cooling This is the Leaving Chilled Liquid Temperature Cycling Restart setpoint See the description in the following section of programmable setpoints If Ice Storage is On and the Leaving Chilled Liquid Temperature Setpoint is lt 0 C 32 F the Restart Offset is the value programmed as the Ice Storage Restart Offset YNWS 02 GCE 09 09 Ice Storage Active LED Illuminates when Ice Storage mode is active It is active when Ice Storage mode has been turned ON and the Leaving Chilled Liquid Temperature Setpoint is set to lt 0 C 32 F Extinguished when Ice Storage mode is turned ON but not Active It is not active when the Leaving Chilled Liquid Temperature Setpoint is gt 0 C 32 F If Ilce Storage mode is turned OFF this indicator is not displayed PROGRAMMABLE Local Leaving Chilled Liquid Temperature Range Access Level Required OPERATOR This is the range over which an analog 0 20mA 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 5 6 C 10 F 11 1 C 20 F 16 7 C 30 F or 22 2 C 40 F with a default of 5 6 C 10 F it is
82. keys to scroll through the Slot Numbers list and note the number of the parameter s to be displayed Pressing the Select key places a green colored selection box around Custom Slot 1 If itis desired to change an already entered parameter use the 5 and 6 keys to place the selection box around the slot number to be changed With the selection box around the slot number to be changed or entered press the ENTER v key A dialog box is displayed permitting data entry Using the numeric keypad keys enter the desired slot number and press the ENTER v key Custom Slot 1 10 Use the Select key and numeric keypad keys as described above and enter the slot number from Slot Numbers list Setting the Slot number to zero clears the display of this slot number Clear Display Pressing this key clears all selected parameters from the Custom View screen NAVIGATION Home Access Level Required VIEW Causes a return to the Home Screen Custom View Access Level Required SERVICE Causes a return to the Custom View Screen 49 YNWS 02 GCE 09 09 2 29 TREND SCREEN STSTEM DETAILS SYSTEM STATUS DATE TIME CONTROL SOURCE ite ACCESS LEVEL Service LEAVING CHILLED LIQUID CONTROL TREND SCREEN FIG 27 TREND SCREEN OVERVIEW As many as six Operator selected parameters Data Points can be plotted in an X Y graph format The X Axis is scaled per the selected Data Collection Interval and displayed in a time of day or elapsed time
83. l 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 configured 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 80 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 YNWS 02 GCE 09 09 Advanced Diagnostics and troubleshooting information for Service Technicians are included in YORK Service Manual 160 80 M1 Also included in the Service manual are detailed descriptions of chiller features such as the Refrigerant Level Control 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 YORK Chillers not only work well individually but also as a team This new protocol allows increased remote control of the chiller
84. ld or Auto key is pressed Slide Valve Hold Manual Access Level Required SERVICE This key puts the slide valve control into manual mode and holds the slide valve in its present position The slide valve will remain at this position until the Load Unload or Auto key is pressed Slide Valve Unload Manual This key puts the slide valve control into manual mode and unloads the slide valve The slide valve will continue to unload until the Load Hold or Auto key is pressed Slide Valve Auto Access Level Required SERVICE This key puts the slide valve control into automatic mode Maximum Load Temperature Access Level Required SERVICE Allows a Service Technician to specify a special Load Limit for use in certain applications Service Technicians refer to YORK Service Manual 160 80 M1 Maximum Load FLA Access Level Required SERVICE This setpoint is used in conjunction with the above Maximum Load Temperature setpoint Service Technicians refer to YORK Service Manual 160 80 M1 24 Minimum Load Control Source Access Level Required SERVICE The Minimum Load Control feature prevents the Slide Valve from unloading to a position that will not allow sufficient oil transfer to the Oil Separator while the chiller is running If the Slide valve is permitted to unload too far there will not be enough oil transfer to the Oil Separator and a Oil Separator Low Level Safety shutdown will result There are two sele
85. ler This may be reprogrammed to a desired value generally when this value has been reset due to a Microboard replacement but should not be done so arbitrarily YNWS 02 GCE 09 09 Home Setup Control Source Local Number Of Starts 40 Operating Hours Edit Phone Numbers Service Phone Numbers Access Level Required SERVICE Displays up to two service phone numbers The Regional service phone number is displayed as the first number Although the label and number can be changed appropriately the default for this entry is York Intl North American Toll Free Number 1 800 861 1001 The Local service phone number is displayed as the second number Although blank by default the appropriate label and number can be entered by a Service Technician Service Technicians refer to Service Manual 160 80 M1 Hot Gas Bypass Enabled Disabled Access Level Required SERVICE Enables and Disables the optional Hot Gas Bypass Control Feature NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Return to the Setup Screen 43 YNWS 02 GCE 09 09 2 23 HISTORY SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL HISTORY SCREEN Last Notmal Shida own 15 45 26 27 Aug 2004 LOCAL STOP Last kawt Wile Running last len Faults 1 2 3 4 5 by A 5 3 UJ Select Fault Running FIG 21 HYSTORY SCR
86. lluminates when the Hot Gas Solenoid is ON If the chiller is equipped with the Hot Gas Bypass option operation must be enabled on the OPERATIONS Screen 1 NOTE Requires a login access level of SERVICE Service Technicians refer to YORK Service Manual 160 80 M1 for operation instructions and explanation of all programmable setpoints and displayed values DISPLAY ONLY Slide Valve Position The value displayed represents the position of the slide valve relative to fully closed at 0 and fully open at 100 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 Hot Gas Solenoid LED Indicates whether the solenoid is presently energized 26 PROGRAMMABLE On Setpoint The Hot Gas Bypass solenoid valve is turned on when the Return Chilled Liquid Temperature decreases to lt the number of degrees of this On Setpoint above the Leaving Chilled Liquid Temperature Setpoint The ON Setpoint is programmed over the range of 0 6 C 1 0 F to 5 6 C 10 0 F default 0 6 C 1 0 F Service Technicians refer to YORK Service Manual 160 80 M1 for an explanation of this setpoint Off Setpoint Once the Hot Gas Bypass solenoid valve is turned on it is turned off when the Return Chilled Liquid Temperature increases above the Leaving Chilled Liquid Temperature Setpoint
87. lly restart when the voltage in all phases returns to the restart level The thresholds are as follows Supply Voltage Range Volts Shutdown Volts Restart Volts Disabled None N A 200 208 160 174 220 240 185 200 380 305 331 400 320 349 415 335 362 440 480 370 400 550 600 460 502 LCSSS HIGH SUPPLY LINE VOLTAGE The Liquid Cooled Solid State Starter Logic Trigger Board has detected that the compressor motor AC power line voltage in any phase exceeded the high line voltage threshold continuously for 20 seconds The chiller will automatically restart when the voltage in all phases returns to the restart level The thresholds are as follows Supply Voltage Range Volts Shutdown Volts Restart Volts Disabled None N A 200 208 227 226 220 240 262 261 380 415 414 400 436 435 415 454 453 440 480 524 523 550 600 655 654 63 YNWS 02 GCE 09 09 LCSSS LOGIC BOARD PROCESSOR Communication between the V25 Microprocessor and Digital Signal Processor DSP on the Liquid Cooled Solid State Starter Logic Trigger Board has been interrupted The chiller will automatically restart when communications are restored LCSSS LOGIC BOARD POWER SUPPLY Following application of power this message is displayed and a snapshot of the LCSSS parameters and time of power failure are sent to the Control Center LCSSS PHASE LOSS The Liquid Cooled Solid State Starter Logic Trigger Board has detected the line to line RMS voltage in
88. 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 7 C 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 Leading zeroes are not necessary If a decimal point is necessary press the e key i e 7 2 Pressing the A key sets the entry value to the default for that setpoint Pressing the V key clears the present entry The lt key is a backspace key and causes the entry point to move back one space If the dialog box begins with SELECT use the lt and gt keys to select the desired value If the previously defined setpoint is desired press the X Cancel key to dismiss the dialog box 3 Press the V Enter key If the value is within range it is accepted and the dialog box disappears The chiller will begin to operate based o
89. n the chiller system This allows programming of the Current Limit and the Pulldown Demand Limit values 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 15 YNWS 02 GCE 09 09 2 6 SYSTEM SCREEN SYSTEM STATUS SYSTEM RUN STEM DETAILS LEAVING CHILLED LIQUID CONTROL SYSTEM SCREEN Differential Oil Pressure 1098 4 kPaD jr ujygriur EEE eee Condenser CUP Jarra Cza 35 0 C Retim 729 4 C Condenser Pressure Condenser Saturation FIG 4 SYSTEM SCREEN 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 20 mA 0 10VDC or 2
90. n the new programmed value If out of range the value will not be accepted and the user is prompted to try again 11 YNWS 02 GCE 09 09 Manual Controls Some keys are used to perform manual control functions These may involve manual control of items such as the slide 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 specific 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 field At this point the T 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 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 defined These keys allow the user to either move forward to a sub screen 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 nam
91. ndenser High Pressure Warning Threshold 1792 Leaving Chilled Liquid Temperature 2059 SubCooling Temperature 1793 Leaving Chilled Liquid Temperature Differential 2304 Motor Starter Type 1794 Leaving Chilled Liquid Is Flow Switch Closed 2305 Motor Is Motor Starter On 1795 Leaving Chilled Liquid Is Pump On 2306 Motor Current FLA 1796 Leaving Chilled Liquid Local Temperature Set 2307 Motor Is Motor Controller Switch Open point 2308 Motor Current Limit Local Setpoint 1797 Leaving Chilled Liquid Remote Analog Temperature 2309 Motor Current Limit Remote Analog Setpoint Setpoint 2310 Motor Current Limit Remote ISN Setpoint 1798 Leaving Chilled Liquid Remote ISN Temperature 2311 Motor Current Limit Remote Modem Setpoint Setpoint 2312 Motor Current Limit Selected Setpoint 1799 Leaving Chilled Liquid Remote Modem Tem perature Setpoint 57 YNWS 02 GCE 09 09 ra DESCRIPTION a DESCRIPTION 2313 Motor Pulldown Demand Time Remaining 2582 Serial SSS Full Load Amps 2314 Motor Pulldown Demand Limit Setpoint 2583 Serial SSS Voltage Range 2315 Motor Pulldown Demand Time Setpoint 2584 Serial SSS Starting Current 2316 Motor Anti Recycle Time Remaining 2585 Serial SSS Is Serial Communications OK 2317 Motor Current Limit Remote Digital Setpoint 2586 Serial SSS Panel to Sss Comm Errors Mod B SSS Only 2587 Serial SSS to Panel Comm E
92. nges from the Secondary Trigger minimum to the Secondary Trigger maximum NAVIGATION Home Causes an instant return to the Home Screen Trend Setup Causes an instant return to the Trend Setup Screen 55 YNWS 02 GCE 09 09 2 32 COMMON SLOTS SCREEN SYSTEM STATUS OATES TIME CONTROL SOURCE 5 SYSTEM RUN raug 2000 ira GT WA Home SYSTEM DETAILS LEAVING CHILLED LIQUID CONTROL Service TREND COMMON SLOTS SCREEN YORK Slot s Trend Setup bs i c 1997 2000 YORK INTERNATIONAL CORPORATION Fri 27 Aug 2004 11 14 51 262 Operating Hours 264 Humber Of Starts Evaporator Page Down Leaving Chilled Liquid Temperature Temperature Differential Chilled Liquid Flow Switch Chilled Liquid Pump Return Chilled Liquid Temperature Evaporator Pressure Evaporator Saturation Temperature Small Temperature Difference Evaporator Refrigerant Temperature Delta P P Suction Superheat OVERVIEW This screen displays the slot numbers of the commonly monitored parameters The slot numbers for the remainder of the available parameters are listed on the Master Slot Numbers List that follows From these lists select up to six parameters to be trended Return to the Trend Setup Screen and enter the parameters Slot Numbers into Data Points 1 through 6 2 NOTE DISPLAY ONLY Slot Numbers These are the slot numbers of the most commonly used parameters Requires a login access level of OPERATOR or higher
93. ns Automatic timed start ups and shutdowns are also programmable to suit nighttime weekends and holidays The operating status temperatures pressures and other information pertinent to operation of the chiller are automatically displayed and read on a graphic display Other displays can be observed by pressing the keys as labeled on the Control Center The chiller with the OptiView Control Center is applied with an electro mechanical starter or YORK Solid State Starter optional CONTROL CENTER EVAPORATOR Chillers could be equipped with the Mod B Solid State Starter This starter contains a combination Logic Trigger Board that interfaces to the Control Center with a serial communication link In operation a liquid water or brine to be chilled flows through the evaporator where refrigerant absorbs heat from the liquid The chilled liquid is then piped to fan coil units or other air conditioning terminal units where it flows through finned 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 in the evaporator flows to the compressor where rotary screw action compresses it increasing its pressure and temperature and discharges it into the oil separator section which removes the oil before the high pressure gas flows into the condenser tube bundle Water flowing through the condenser tubes absorbs heat from th
94. o display all 75 changes Not all setpoints are logged Service technicians refer to list in YORK Service Manual 160 80 M1 The details of any setpoint change can be viewed by navigating to a subscreen that displays the date and time of the change Access Level and USER ID used to make the change the old setpoint value and the new setpoint value Note Requires a login access level of SERVICE DISPLAY ONLY Category Displays the category of the setpoint motor evaporator condenser etc Setpoint Displays the setpoint that was changed New Value Displays the value that was entered at the time of the setpoint change 46 DATED JME 27 Aug 2004 Local i Home Service New Valve History Page Down Print PROGRAMMABLE Log Entry Allows the user to select a particular setpoint change for detail viewing Print Generates a detailed report of all setpoint changes listed in the setpoint change log Page Up Scroll up in the displayed data if applicable Page Down Scroll down in the displayed data if applicable NAVIGATION Home Access Level Required SERVICE Causes an instant return to the Home Screen History Access Level Required SERVICE Causes an instant return to the History Screen View Details Access Level Required SERVICE Causes a move to a sub screen containing the details of the setpoint change selected with the Log Entry Key 2 26 SECURITY LOG DETAILS SYSTEM STATUS Des
95. ons may be scheduled up to five 5 weeks in advance and also for the present week As each week goes by the new schedule will be created for the present week using the Exception specification in combination with the Standard week definition as described above Schedule Enabled Disabled Access Level Required OPERATOR Allows the user to enable or disable the monitoring function which enforces the scheduled starting and stopping of the chiller Repeat Sunday Schedule Access Level Required OPERATOR Duplicates the schedule defined for Sunday for the remainder of the standard weekdays 37 YNWS 02 GCE 09 09 Reset All Exception Days Access Level Required OPERATOR Deletes all programming for exception days within the next 6 weeks Select Access Level Required OPERATOR Places a selection box around a start time for a given day Use lt 4 A or Y cursor arrows to place the box around the desired start or stop time for a given day Print Access Level Required VIEW Generates a Schedule print report 38 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Return to the previous setup screen 2 18 USER SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL USER SCREEN UserID Password Useri 1 0 View User 2 2 0 View Users 3 0 View User4 4 0 View User Attributes Programming Instuctons 1 P
96. ould come from a 0 20mA or 4 20 mA 0 10VDC or 2 10VDC input in Analog Remote mode PWM signal in Digital Remote mode ISN Microgateway interface in ISN mode or a locally programmed value in local mode This setpoint is in effect for either WATER BRINE or BRINE ICE storage operation In water cooling or brine cooling mode the slide valve is modulated to achieve this setpoint In brine ice storage mode unload pulses are inhibited allowing the chiller to make ice at a faster rate as explained in the Operation section The water cooling setpoint range is 3 3 C 38 F to 21 1 C 70 F The brine cooling setpoint range is 20 C 4 F to 21 1 C 70 F and the default is 7 2 C 45 F When in brine mode and Ice Storage mode is on it is automatically activated and deactivated by the setpoint that is entered 20 C 4 F to 0 C 32 F activates ice storage mode gt 0 C 32 F to 21 1 C 70 F deactivates ice storage mode This allows the chiller to be switched in and out of ice storage mode when in brine mode and ice storage is on by locally or remotely changing this setpoint Leaving Chilled Liquid Temperature Setpoints Remote Range Displays the present maximum range above the Leaving Chilled Liquid temperature setpoint that this setpoint can be remotely changed to This is the Local Leaving Chilled Liquid Temperature Range setpoint See the description in the following section of programmable setpoints Leav
97. process the chiller will shutdown and display LEAVING CHILLED LIQUID LOW TEMPERATURE when the Leaving Chilled Liquid Temperature decreases to lt the programmed Leaving Chilled Liquid Temperature Cycling Offset Shutdown setpoint After it has shutdown the chiller is prevented from restarting until the Leaving Chilled Liquid Temperature has increased to gt the programmed Leaving Chilled Liquid Temperature Cycling Offset Restart setpoint This prevents short cycling the chiller YNWS 02 GCE 09 09 The chiller can cool WATER or a BRINE solution Water can be cooled over a range of 3 3 38 0 F to 21 1 C 70 0 F If Smart Freeze protection explained below is enabled the range is 2 2 36 0 F to 21 1 C 70 0 F Brine solution can be cooled over a range of 20 0 C 4 0 F to 21 1 C 70 0 F Ice Storage mode is an operating mode within Brine mode that allows the chiller to make ice at a faster than normal rate by inhibiting unload pulses to the Slide Valve Load pulses are applied until the Leaving Chilled Liquid Temperature Cycling Offset Shutdown threshold is reached whereupon the chiller shuts down No unload pulses or hold outputs are applied to the Slide Valve unless any of the following Load Limit conditions exist Low Evaporator Pressure High Condenser Pressure High Motor Current or Low Discharge Superheat The chiller will automatically restart when the Ice Storage Restart threshold is exceeded Ice sto
98. quired VIEW Causes an instant return to the Home Screen 2 8 CONDENSER SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL CONDENSER SCREEN DATE UME CONTROL SOURCE 27 Aug 2004 ET Local YNWS 02 GCE 09 09 Home ACCESS LEVEL S Service Retin Condenser Ligqnid temperature 29 4 C Leaving Condenser liqnid heniperature 35 0 C Gondenser Saturation lemperature 34 0 C SmalTemperatre Viifarze 1 0 C Gondensen Hrzcytiiz 1255 5 kPaG FIG 6 CONDENSER SCREEN 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 flow 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 High Pressure Warning Threshold 1723 7 kPa
99. r MAX value that makes the span evenly divided by 20 For example if 0 0 is selected as the MIN and 69 0 as the MAX the Program will insert 70 0 as the MAX value If the parameter selected for this data point is a digital type on off this value must be set to one 1 One indicates the on state NAVIGATION Home Causes a return to the Home Screen Trending Causes a return to the Trending Screen Slot Numbers Causes a jump to a sub screen that lists the slot numbers of the most commonly monitored parameters The desired parameters to be plotted are selected from this screen Triggers Causes a jump to the Advanced Trend Setup Screen where the start stop Triggers can be setup Only displayed if TRIGGERED has been selected as Chart Type 53 YNWS 02 GCE 09 09 2 31 ADVANCED TREND SETUP SCREEN DATE TIME 27 Aug 2004 Home Service Trend Setup Leaving Chilled Liquid Temperature lt 7 2 C Primary Trigger Primary Operator Evaporator Pressure lt 523 8 kPaG then Stop the data collection Primary Test Trigger Action with a delay ot ODays OHr 5Min OSec Primary to Secondary Operator Secondary Trigger Secondary Operator Trigger Delay Secondary Test FIG 29 ADVANCED TREND SETUP SCREEN OVERVIEW The desired data collection start stop triggers are setup on this screen The trend data collection can be set to start or stop based upon the status of up to two selected T
100. r Enabled Power Failure Restart Displays Manual or Automatic Liquid Type Displays Water or Brine DATE TIME CONTROL SO 27 Aug 2004 11 39 YNWS 02 GCE 09 09 Home ACCESS LEVEL Schedule Comms Printer Sales Order Operations 12 24 hr 24 Hour Diagnostics PROGRAMMABLE Set Date Access Level Required OPERATOR Allows the user to specify the present date This value is critical to logging system shutdowns accurately and for utilizing the scheduling capabilities When prompted to enter a date value the user must enter the day month and four digit year using leading zeroes as necessary If within range the value will be accepted If out of range the user is prompted for the information again At this point the user may retry the date entry or cancel the programming attempt Set Time Access Level Required OPERATOR Allows the user to specify the present time This value is critical to logging system shutdowns accurately and for utilizing the scheduling capabilities When prompted to enter a time value the user must enter the hour and minute desired using leading zeroes as necessary If the chiller is presently set to 24 hour mode the time must be entered in the 24 hour format Otherwise the user must also select AM or PM for the entered time If out of range the user is prompted for the information again At this point the user may retry the time entry or cancel the programming attemp
101. r greater than the allowable number of seconds The evaporator refrigerant temperature used is the Evaporator Saturation Temperature derived from the Evaporator Pressure Transducer and the freeze threshold is 1 1 C 34 0 F The count is incremented once for every second the evaporator refrigerant temperature is below the freeze threshold but is never decremented below zero The number of seconds it will take the chilled liquid to 64 freeze is based on how far the evaporator refrigerant temperature is below the freeze threshold as follows Number of seconds to freezing 4053 7 freeze threshold evaporator refrigerant temperature Smart Freeze is activated only if the feature has been Enabled by a Service Technician following instructions in Service Manual 160 80 M1 and the Leaving Chilled Liquid Temperature setpoint is lt 3 3 C 38 0 F CONDENSER HIGH PRESSURE CONTACTS OPEN The contacts of the electro mechanical high pressure safety device located on the condenser shell have opened because this device has detected a pressure gt 1861 6 kPaG 270 0 PSIG The contacts will automatically close when the condenser pressure decreases to lt 1447 9 kPaG 210 0 PSIG The chiller can be started after the contacts close and the COMPRESSOR switch is placed in the Stop Reset O position CONDENSER HIGH PRESSURE The condenser pressure as sensed by the Condenser Transducer has increased to the Safety shutdo
102. r has elapsed Ifthe Trigger Action is set to Stop data collection will stop after the Triggers evaluate as true and the delay timer has elapsed Primary to Secondary Operator Access Level Required OPERATOR Selects whether the Primary Trigger Secondary Trigger or both have to be true in order to start or stop data collection Selections are AND OR XOR and None If NONE is selected the Secondary Trigger is disabled Data collection will start stop as selected with Trigger Action when e If AND selected Both Primary AND Secondary are true e fORselected Either Primary OR Secondary or both are true If XOR selected Either Primary OR Secondary but not both are true YNWS 02 GCE 09 09 Secondary Trigger Access Level Required OPERATOR Selects the second parameter to be evaluated Selection is made from the Slot Numbers listing on the Trend Common Slots Screen or the Master Slot Numbers List in this book Setting this slot number to zero disables the Secondary Trigger Secondary Operator Access Level required OPERATOR Selects the comparator for the Secondary Trigger s relationship to the Secondary Test If the Secondary trigger is an Analog value selections are lt lt gt gt If the Secondary Trigger is a digital event selections are Equal To Not Equal To Secondary Test Access Level Required OPERATOR Selects the value or condition that the Secondary Trigger is compared to Selection ra
103. rage mode is turned ON from the Evaporator Screen After it is turned ON Ice Storage mode is automatically Activated inhibits unload pulses and Deactivated allows unload pulses by the value programmed for the Leaving Chilled Liquid Temperature Setpoint Values lt 0 C 32 0 F Activates Ice Storage mode Setpoint values gt 0 C 32 0 F Deactivate Ice storage Mode An LED on the Evaporator Screen illuminates when Ice Storage mode is Active This allows the chiller to be switched in and out of Ice Storage mode by a Local or Remote change of this setpoint This feature allows the chiller to make ice in the nighttime hours and perform air conditioning duty during the daytime hours simply by changing the Leaving Chilled Liquid Temperature Setpoint When Ice storage is turned ON there are two different Restart Setpoints employed One is programmed and will be in effect when the Leaving Chilled Liquid Temperature Setpoint is lt 0 C 32 0 F Ice Storage mode Active the other is programmed and will be in effect when the setpoint is gt 0 C 32 0 F Ice Storage mode Not Active Each Restart setpoint can be programmed to a different value To prevent nuisance shutdowns due to brief periods of chilled liquid flow fluctuations or other brief operating conditions that would normally cause Low Evaporator Pressure safety shutdowns the Smart Freeze protection feature can be enabled by a Service Technician With this feature enabled and a
104. rd TB4 7 8 or in ISN Integrated Systems Network Remote mode via the Microgateway serial communications If the chiller is running when this occurs the Slide Valve is fully unloaded prior to shutting down the chiller LOCAL STOP A local shutdown command has been received by placing the Keypad Start Run Stop Reset Switch in the stop O position PLACE COMPRESSOR SWITCH IN RUN POSITION The Control Center is in either Digital or ISN Integrated Systems Network Remote mode The Operator is requested to place the COMPRESSOR Switch in the RUN position The Control Center will not accept a Remote start stop command unless the switch is in the RUN position CYCLING SHUTDOWN MESSAGES MULTIUNIT CYCLING CONTACTS OPEN The Multiunit Cycling contacts connected to I O Board TB4 9 have opened to initiate a cycling shutdown If the chiller is running when this occurs the Slide Valve is fully unloaded prior to shutting down the chiller The chiller will automatically restart when the contacts close SYSTEM CYCLING CONTACTS OPEN The System Cycling contacts connected to I O Board TB4 13 have opened to initiate a cycling shutdown If the chiller is running when this occurs the slide valve is fully unloaded prior to shutting down the chiller The chiller will automatically restart when the contacts close 61 YNWS 02 GCE 09 09 CONTROL PANEL POWER FAILURE A Control Power failure has occurred If the power failure o
105. ress hange User Atinbutes to start programming 2 Use cursor keys to select desired parameter 2 Press Enter key to mput parameter FIG 16 USER SCREEN OVERVIEW This screen allows definition of custom User ID s and matching passwords This allows the building administrator to assign custom passwords to those who are authorized to maintain the chiller Each Custom User value is not linked to a specific button Instead the Change button is pressed which enables the cursor arrows which are used to highlight the Custom User parameter the user wishes to modify At this point the V Check button is pressed and the value may be entered DISPLAY ONLY None PROGRAMMABLE System Language Access Level Required OPERATOR Allows the user to define the language for all Screens The desired language is selected by scrolling through the list of those available English is the Default language and is selected by pressing the A key when the dialog box appears during the selection process The selected language will not be displayed until after the user navigates from the USER Screen to another Screen English Metric Units Access Level Required OPERATOR Define the unit system English or Metric used by the chiller display DATE TIME CONTROL SO 27 Aug 2004 ians _ User Level YNWS 02 GCE 09 09 eame OMe Setup Metric Data Display Mode System Language English Change User Attributes Custom User ID 4
106. riggers The Triggers can consist of digital events or analog parameters compared to thresholds The Triggers can be used individually or in combination The digital and analog parameters are selected from the Common Slots Screen or Master Slot Numbers List in this book The parameter selected as the Primary Trigger is compared to a value selected as the Primary Test using the Primary Operator as a comparator If it is evaluated as true then the data collection is started or stopped after any selected Trigger delay per the selected Trigger Action A Secondary Trigger can be evaluated with the Primary Trigger to start stop data collection The Primary to Secondary Operator is used to define the Trigger combinations required to be true to start stop data collection The Secondary Trigger is setup and evaluated the same as the Primary Trigger Entry fields are as follows If Primary Trigger Is Primary Operator Primary Test Primary to Secondary Operator Secondary Trigger Is Secondary Operator Secondary Test Then Trigger Action the Data Collection With a delay of Trigger Delay 54 After the desired Triggers are set the START key on the TREND Screen must be manually pressed before the triggers will be evaluated While waiting for the triggers to start or stop data collection a status message is displayed in the upper right corner of the TREND Screen describing the pending action DISPLAY ONLY None PROGRAMMABLE Prima
107. rrors 2570 Serial SSS Input Power 16388 Slide Valve Position 2571 Serial SSS Kilowatt Hours 16401 Oil Pressure 2572 Serial SSS Phase A Current 16402 Oil Differential Pressure 2573 Serial SSS Phase B Current 16404 Seal Oil Not Used 2574 Serial SSS Phase C Current 16405 Seal Oil Not Used 2575 Serial SSS Phase A Voltage 16406 Filter Oil Pressure 2576 Serial SSS Phase B Voltage 16407 Filter Oil Differential Pressure 2577 Serial SSS Phase C Voltage 16409 Oil Separator Temperature 2578 Serial SSS Phase A Temperature 16410 Variable Orifice Delta P Cond Evap 2579 Serial SSS Phase B Temperature 16412 Variable Orifice Is Solenoid On 2580 Serial SSS Phase C Temperature 16415 Hot Gas Bypass Is Solenoid On 2581 Serial SSS Starter Model 58 2 34 DISPLAY MESSAGES The Status Bar of the Display contains a Status Line and beneath it a Details Line The Status Line contains a message describing the operating state of the chiller whether it is stopped running starting or shutting down The Details Line displays Warning Cycling Safety Start Inhibit and other messages that provide further details of the Status Bar messages The Status Messages listed below are displayed on the Status Line All other messages are displayed on the Details Line To aid in the meaning of the message messages are displayed in different colors as follows Normal Operation messages Green Warnin
108. rs at the time of the selected shutdown Print All Histories Access Level Required VIEW This generates a report listing the status of the chiller parameters at the time of each of the stored shutdowns NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen View Details Access Level Required VIEW Causes a move to a sub screen containing the value of select chiller parameters at the time of the associated shutdown Trending Access Level Required VIEW Causes a move to a sub screen allowing the user to view trending data on selected chiller parameters Custom View Access Level required VIEW Causes a move to a sub screen allowing the user to view the Custom Setup Screen Security Log Access Level Required SERVICE Causes a move to a sub screen allowing the user to view a record of the last 75 setpoint changes 2 24 HISTORY DETAILS SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL HISTORY DETAILS SCREEN YORK History Chiller ID 0 YNWS 02 GCE 09 09 DATE TIME 27 Aug 2004 na _ ACCESS LEWEL Service History c 1997 2000 YORK INTERNATIONAL CORPORATION Fri 27 Aug 2004 11 14 51 SYSTEM RUN EVAPORATOR LOW PRESSURE WARNING SLIDE VALVE UNCALIBRATED Page Down WARNING EVAPORATOR LOW PRESSURE LIMIT Controls Operating Number Of Starts Minutes Hours DENNEJ Control Source Evaporator D Z222 03 02 7Hr
109. ry Trigger Access Level Required OPERATOR Selects the first parameter to be evaluated Selection is made from the Slot Numbers listing on the Trend Common Slots Screen or the Master Slot Numbers List in this book Setting this slot number to zero disables the Primary Trigger Primary Operator Access Level Required OPERATOR Selects the comparator for the Primary Trigger s relationship to the Primary Test If the Primary Trigger is an analog value selections are lt lt gt gt If the Primary Trigger is a digital event selections are Equal To Not Equal To Primary Test Access Level Required OPERATOR Selects the value or condition that the Primary Trigger is compared to Selection ranges from the Primary Trigger minimum value to the Primary Trigger maximum value Trigger Action Access Level Required OPERATOR Selects whether the trend data collection will Start or Stop when the Trigger comparisons are true If set to Start data collection will stop after one screen of data is collected Trigger Delay Access Level Required OPERATOR Allows the data collection start or stop to be delayed after the Triggers evaluate as true The delay is selectable from 1 to 864000 seconds 10 days Display is in days hours minutes and seconds The delay timer begins when the triggers evaluate as true If the Trigger Action is set to Start data collection will begin after the triggers evaluate as true and the delay time
110. s the user to set a period of time for which the pulldown demand limit will be in effect after the chiller starts Print Access Level Required VIEW Generates Setpoints print report NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Setup Access Level Required VIEW Moves to the sub screen allowing setup of general system parameters 2 16 SETUP SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL SETUP SCREEN Standard Chilled Liguid Pump Operation R717 Refrigerant selection Disabled inte Recyde Auto Power Failure Restart Water Liquid type Clock Present Present Enabled Date FIG 14 SETUP SCREEN Time OVERVIEW This screen is the top level of the general configuration parameters It allows programming of the time and date along with specifications as to how the time will be displayed 12 or 24 hour format In addition the chiller configuration as determined by the state of the Micro Board Program Jumpers and Program Switches is displayed A qualified Service Technician following instructions in YORK Service Manual 160 80 M1 establishes this configuration per the desired operation This screen also serves as a gateway to more sub screens for defining general system parameters DISPLAY ONLY Chilled Liquid Pump Operation Displays Standard or Enhanced Refrigerant Selection Displays R717 Anti Recycle Displays Disabled o
111. s to the sub screen displaying the Sales Order information for the chiller system Operations Access Level Required VIEW Moves to the sub screen displaying operating parameters of the chiller system User Access Level Required VIEW Moves to the sub screen allowing configuration of user preferences 2 17 SCHEDULE SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL SCHEDULE SCREEN Mon Jue Weekly 17 00 17 00 23 24 Riess elect button to start Programming se cuzor keys to select desired hme Riess Enter Key to mput start stop tines Print FIG 15 SCHEDULE SCREEN OVERVIEW The schedule screen contains more programmable values than a normal display screen As such each programmable value is not linked to a specific button Instead the Select key is used to enable the cursor arrows which are used to highlight the day and the start or stop time the user wishes to modify At this point the user may press the T Check key to program the Start Stop times for that day In order for the Start Stop combination to be utilized each Start time must have a corresponding Stop time which occurs later in the day The presently programmed schedule for a given day can be cancelled by setting both the Start and Stop time to 12 00AM If the Start time equals the Stop time with any time other than 12 00AM the chiller is OFF for that day If the user desires the chiller to opera
112. shuts down for any reason it cannot be restarted for 2 minutes This message is displayed during that time This is so the refrigerant in the system settles and the evaporator and condenser pressure equalize RUN MESSAGES LEAVING CHILLED LIQUID CONTROL The chiller is running controlling the Leaving Chilled Liquid to the Leaving Chilled Liquid Temperature Setpoint There are no system conditions inhibiting this operation MOTOR PULLDOWN LIMIT The Pulldown Demand Limit Setpoint timer is in effect and the Compressor Motor current is gt the Pulldown Demand Current Limit Setpoint value The slide valve operation is being inhibited as described in MOTOR HIGH CURRENT LIMIT message below 59 YNWS 02 GCE 09 09 MOTOR HIGH CURRENT LIMIT The Compressor Motor Current is gt the Local or Remote Current Limit Setpoint The Current Limit Setpoint is programmed over a range of 30 to 100 of the Chiller Full Load Amps FLA When the motor current increases to the inhibit load threshold the slide valve is inhibited from further loading This prevents a further current rise If the current continues to rise to the start unload threshold the slide valve begins unloading until the current falls to the stop unload threshold Automatic Slide Valve operation is resumed and this message automatically clears when the motor current decreases to the allow load threshold To allow field calibration of the CM 2 Current Modul
113. start when the flow switch closes MOTOR CONTROLLER CONTACTS OPEN The CM 2 Current module Electromechanical starter applications has shutdown the chiller When detecting a fault condition that places the starter or motor at risk this device open the Motor Controller contacts CM located on the CM 2 Board and connected between TB6 16 and TB6 53 in the Control Center to initiate a shutdown Since there are several different faults that are monitored LED s on the CM 2 Board illuminate to identify the fault The chiller will automatically restart when the Motor Controller contacts close On some shutdowns the CM 2 Board automatically closes the contacts when the fault condition clears Other shutdowns require the Operator to perform a Manual Reset at the CM 2 Board Device Manual Reset Fault Automatic Reset Fault CM 2 Module Overload None 62 MOTOR CONTROLLER LOSS OF CURRENT The Compressor Motor current decreased to 10 Full Load Amps FLA for 25 continuous seconds while the chiller was running This could be caused by the starter de energizing during run or a defect in the motor current feedback circuitry to the Control Center The chiller will automatically restart at the completion of System Coastdown POWER FAULT The CM 2 Current Module Electro mechanical starter applications has shutdown the chiller because it detected a fault condition that places the motor at risk This device open
114. stood 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 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 NOTE se UE i gt 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 ZN CAUTION 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 caus
115. t 35 YNWS 02 GCE 09 09 Clock Enabled Disabled Access Level Required OPERATOR Allows the user to enable or disable the real time clock in order to conserve battery life The clock will be disabled during manufacturing and must be enabled at system commissioning In addition when preparing for prolonged shutdown the clock should once again be disabled 12 24 Hr Access Level Required OPERATOR Allows the user to specify the format in which the time will be presented to the user This setpoint will affect the display of the time on the chiller panel and on all reports generated 12 Hour time format will include the AM and PM modifiers and show the range of time between 1 00 and 12 59 while the 24 Hour time format will show the range of time between 0 00 and 23 59 NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Schedule Access Level Required VIEW Moves to the sub screen allowing definition of the chiller operation schedule 36 Diagnostics Access Level Required SERVICE Moves to the sub screen allowing limited diagnostic capability while operating Refer to YORK Service Manual 160 80 M1 Comms Access Level Required VIEW Moves to the sub screen allowing configuration of system communications Printer Access Level Required VIEW Moves to the sub screen allowing configuration and control of printer functions Sales Order Access Level Required VIEW Move
116. t signals from the Control Center simultaneously one via the serial communications link and one via the start relay TB6 24 in the Control Center If they are not received within 5 seconds of one another a cycling shutdown is performed and this message is displayed This is generally indicative of defective wiring YNWS 02 GCE 09 09 LCSSS INVALID CURRENT SCALE SELECTION There is an invalid compressor motor current scale jumper combination installed in the Liquid Cooled Solid Starter Logic Trigger Board J1 Jumper combination determines allowable 100 FLA setpoint range 7L 35 to 260A 14L 65 to 510A 26L 125 to 850A and 33L 215 to 1050A The chiller will be permitted to start when the jumpers are configured correctly Refer to YORK Starter service manual 160 00 02 for valid jumper configurations LCSSS PHASE LOCKED LOOP The Liquid Cooled Solid State Starter Logic Trigger Board phase locked loop circuit was not able to maintain lock with phase A of the power line This could be caused by a power line anomaly such as sag or jitter A power line frequency jitter of up to 3Hz second can be tolerated The chiller will automatically restart when lock has resumed LCSSS LOW SUPPLY LINE VOLTAGE The Liquid Cooled Solid State Starter Logic Trigger Board has detected that the compressor motor AC power line voltage in any phase decreased below the low line voltage threshold continuously for 20 seconds The chiller will automatica
117. te continuously through several days the Stop time of Day 1 can be set to 11 59 PM and the Start time of Day 2 can be set to 12 00 AM The chiller will not stop but continue to operate until the stop of Day 2 The user has the ability to define a standard set of Start Stop times which are utilized every week The user may then specify exception Start Stop combinations for any day of the week up to 6 weeks in advance At the end of each week the schedule for the next week is created by combining the standard week definition and the next defined exception week The schedule is then updated as each of the exception weeks shifts down leaving a new blank exception week in the 6 week slot DATE TIME CONTROL 50 27 Aug 2004 11 45 _ Wed Standard 3 00 3 00 3 00 17 00 YNWS 02 GCE 09 09 Home JKU Fri 9 00 9 00 17 00 17 00 27 Setup Select Schedule Disabled Reset Exceptions Repeat Sunday DISPLAY ONLY None PROGRAMMABLE Standard Week Start Stop Times Access Level Required OPERATOR For each day of the week the user may specify a time for the chiller to start and a time for the chiller to stop The times specified in this entry week will be used as the default for every week of chiller operation Exception Start Stop Times Access Level Required OPERATOR For each day of the week the user may specify a time for the chiller to start and a time for the chiller to stop These Start Stop combinati
118. tered by the YORK Service Technician at the time of chiller commissioning These values should never be changed or entered by anyone other than a qualified Service Technician Entry instructions are included in the YORK Service Manual 160 80 M1 The remainder of the values are entered at the YORK Factory during the manufacturing of the chiller DISPLAY ONLY Model Number Factory defined model number of the chiller system Panel Serial Number Factory defined serial number for the micropanel Chiller Serial Number Factory defined serial number for the chiller system YORK Order Number Factory defined order number under which the chiller was sold System Information Factory defined conditions for which the chiller was originally rated and sold 42 DATE TIME CONTROL SOURCE 27 Aug 2004 HA Local Nameplate Intonmaton Home Service Setup Motor Code a Volts Ea Phases Frequency HA IRA Eni ioad Amps intush Amps System Intoimavon Refrigerant Set Order Info Tons Gear bode gud tippe oz Kanai 5D SS5 EM Kilowatte Input Condenser and Evaporator Design Load Information Factory defined description of the condenser and evaporator configuration at time of shipment Nameplate Information Factory defined information about the chiller motor configuration PROGRAMMABLE Commissioning Date Access Level Required SERVICE Define the date at which the chiller was commissioned
119. the user through the calibration process and indicate its success or failure PROGRAMMABLE Start Calibration This option is hidden after calibration has started Service Technicians refer to YORK Service Manual 160 80 M1 for an explanation of this setpoint Cancel Calibration This option only becomes available after calibration has started Service Technicians refer to YORK Service Manual 160 80 M1 for an explanation of this setpoint NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen Compressor Access Level Required VIEW Return to the Compressor Screen 27 YNWS 02 GCE 09 09 2 12 OIL SEPARATOR SCREEN YSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAVING CHILLED LIQUID CONTROL OIL SEPARATOR SCREEN crs UME 27 Aug 2004 Local Home Service Oil Pressure 1249 2 dee 1098 4 kPaD Diferential Oi pressure Filter Ppessiire 1284 5 kPaG 24 9 kPaD Differential FILET Pressure Usenet hemperatine LEM MYLEA EEUE Pressing Condenser satiation 35 0 C 1253 8 kPaG Condenser Pressure Discharge SUpeNeat 19 5 C Bees ON FE uiyzraiUr o AA A Disabled 0il Return Solenoid Low Separator Oil Level Auto Zero Seal Pressure Disabled FIG 10 OIL SEPARATOR SCREEN OVERVIEW This screen displays a close up of the chiller oil sump and provides all the necessary setpoints for maintaining the oil DISPLAY ONLY Discharge Temperature Displays the temperatur
120. ut to the compressor and the evaporator pressure To restart the chiller press the COMPRESSOR Switch to STOP RESET position then to START position OIL OR CONDENSER TRANSDUCER ERROR The chiller is shut down because the oil pressure was greater than the condenser pressure 138 kPaG 20 PSIG for 10 continuous minutes after the chiller was running for 10 minutes The condenser pressure in the formula is that which is measured at the condenser The oil pressure is that which is measured at the input to the compressor To restart the chiller press COMPRESSOR switch to STOP RESET position then to START position OIL CLOGGED FILTER The chiller is shut down because the OIL FILTER DIFFERENTIAL PRESSURE Refer to the description of the OIL SEPARATOR screen exceeded 172 kPaD 25 PSID for 8 continuous seconds To restart the chiller press COMPRESSOR switch to STOP RESET position then to START position YNWS 02 GCE 09 09 OIL HIGH PRESSURE Chiller is shut down because the oil pressure transducer that is sensing oil pressure at the input to the compressor indicated 2068 kPaG 300 PSIG while the chiller was running The chiller will be allowed to restart when the pressure decreases to 2062 kPaG 299 PSIG This safety shutdown is provided as a verification of transducer accuracy Display of this message is generally indicative of a defective transducer or interface To restart the chiller press COMPRESSOR switch to STOP RES
121. valve which modulates to load and unload the slide valve that increases or decreases the amount of refrigerant flowing to the compressor thus controlling the chiller capacity 1 3 CHILLER OPERATION OVERVIEW In the following description reference is made to procedures that should be performed only by a Service Technician Instructions for these procedures are in YORK Service Manual 160 80 M1 and require Service access level The chiller will be permitted to start only if there are no Safety or Cycling shutdown condition in effect and the slide valve position is lt 30 When a Local or Remote start signal is applied the 30 second start sequence is initiated START SEQUENCE INITIATED along with a 30 second countdown timer is displayed on the System Status line of the Display During the first 15 seconds the pressure transducer Auto Zeroing if enabled is performed To compensate for Transducer differences and assure differential pressure accuracy the transducer outputs that are involved in creation of differential values are compared in the Auto Zeroing process During this period the output of both transducers that are creating the differential pressure are compared to determine the offset between them Since system pressures should be equalized during this period both transducers will be sensing the same pressure and their outputs should indicate the same pressure However to compensate for differences between transducers
122. w XX X Full Load Amps This displays the percentage of full load amps utilized by the system Current Limit Displays the current limit value in use This value could come from a 0 20mA or 4 20 mA 0 10VDC or 2 10VDC input in Analog Remote mode PWM signal in Digital Remote mode ISN Microgateway interface in ISN mode or a locally programmed value Slide Valve Position The value displayed represents the position of the slide valve relative to fully closed at 0 and fully open at 100 YNWS 02 GCE 09 09 PROGRAMMABLE None NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen 17 YNWS 02 GCE 09 09 2 7 EVAPORATOR SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAVING CHILLED LIQUID CONTROL EVAPORATOR SCREEN Leaving Ghilled liquid femperaure 7 2 C ketum ciilled Digna emperaire 12 8 C Su einige Dinerente 0 0 C Evaporaton Bessien 523 8 kPaG Evaporator Zd dur empe atre ACZEC quid ow Switch Closed foe Fun Run 8 2 C Local Leaving Chilled Liquid Temperature Range 5 6 C DATE TIME 27 Aug 2004 i505 Leaving Chilled Liquid Temperature Cycling Offset Restart 0 0 d CONTROL SOURCE Local ACCESS LEVEL Service Home Leaving Chilled Liqinid hempenaine Seipoints Setpoint 7 2 C 5 6 C Remote Range Shutdown EOG FZZ uz Restart 7 2 C S Offset Ice Storage Normal Sensitivity Smart Freeze Low Evaporator Cutout R
123. wn treshold The chiller can be started after the condenser pressure decreases to the Restart treshold and the COMPRESSOR switch is placed in the Stop Reset position O The Safety shutdown treshold and the Restart shutdown treshold are calculated from the Warning treshold programmed at the YORK factory as follows Safety Treshold Warning Treshold 83 kPag 12 PSIG Reset Treshold Safety Treshold 414 kPag 60 PSIG CONDENSER HIGH PRESSURE STOPPED The condenser pressure exceeded 1689 2 kPaG 245 0 PSIG while the chiller was stopped High temperature condenser water flowing through the condenser while the chiller is shutdown can cause a condenser high pressure condition resulting in loss of refrigerant This safety fault anticipates this problem by annunciating the condenser high pressure condition The chiller can be restarted after a Service Technician performs a special reset preset procedure contained in YORK Service Manual 160 80 M1 CONDENSER PRESSURE TRANSDUCER OUT OF RANGE The Condenser Pressure Transducer is indicating a pressure that is gt 2172 kPaG 315 0 PSIG This is outside the normal operating range of the transducer This is generally indicates a defective transducer The chiller can be started after the transducer is indicating a pressure that is within range and the COMPRESSOR switch is placed in the Stop Reset O position AUXILIARY SAFETY CONTACTS CLOSED The Auxiliary Safet
124. xis Access Level Required VIEW This key toggles the X Axis labels of the graph Each key press alternates the scaling between time of day and elapsed time The Time of Day scaling is in 24 hour format The Elapsed Time scaling is the time elapsed since the START key was pressed starting the trending NAVIGATION Home Access Level Required VIEW Causes a return to the Home Screen History Access Level Required VIEW Causes a return to the History Screen Trend Setup Access Level Required Only displayed if the trending is stopped Causes a jump to a sub screen for configuring the trending display 51 YNWS 02 GCE 09 09 2 30 TREND SETUP SCREEN LEAVING CHILLED LIQUID CONTROL TREND SETUP SCREEN Slit Minimum Mazimum SIGT Minimum Mazimum Sit DAARNA DAARDIE Uae Puineg jiu Hress Select button to start programming Use coi seus U salani desired parameter FIG 28 TREND SETUP SCREEN OVERVIEW This screen is used to configure the trending screen The parameters to be trended are selected from the Common Slots Screen or Common Slots Master list and entered as Slot Numbers for Data Points 1 through 6 The Y Axis minimum and maximum values for each parameter are entered as Data Point Min and Data Point Max for Data Points 1 through 6 The interval at which all the parameters are sampled is selected as the Data Collection Interval DISPLAY ONLY None PROGRAMMABLE Chart Type Access Level Required
125. xtreme light load conditions by diverting hot refrigerant gas directly from the Oil Separator to the Evaporator bypassing the Condenser A solenoid Valve located in the bypass line is opened and closed under Program control to turn the hot gas on and off When the chiller is shutdown the Hot gas Bypass is turned off Each time the chiller is started it remains off for the first 3 minutes of chiller operation Thereafter it is controlled per the differential between the Return Chilled Liquid temperature and the Leaving Chilled Liquid Temperature Setpoint This differential is programmed as the Hot Gas ON and Hot Gas OFF setpoints by a Service Technician If the chiller is equipped with the Hot Gas feature operation must be enabled by a Service technician A complete description of the Hot Gas Bypass system is contained in YORK Service Manual 160 80 M1 Since the chiller is not allowed to start until the Slide Valve position is lt 30 it is unloaded to lt 30 prior to shutting down on the following routine shutdowns The presence of oil pressure while the chiller is operating facilitates the unloading This minimizes the time delay between starts To assure mechanical problems cannot prevent a chiller shutdown if the Slide Valve has not unloaded to lt 30 within 210 seconds of receiving a shutdown command a shutdown occurs regardless of Slide Valve position e Multi Unit Cycling Contacts Open System Cycling Contacts Open
126. y shutdown contacts connected to I O Board TB4 31 have closed initiating a safety shutdown This input is a general purpose user defined safety shutdown input The chiller can be started after the contacts open and the COMPRESSOR switch is placed in the Stop Reset O position DISCHARGE HIGH TEMPERATURE The discharge temperature as sensed by the Discharge Temperature Thermistor has increased to gt 100 C 212 0 F The chiller can be started after the temperature decreases to lt 100 C 212 0 F and the COMPRESSOR switch is placed in the Stop Reset O position DISCHARGE LOW TEMPERATURE The discharge temperature as sensed by the Discharge Temperature Thermistor has decreased to lt 1 1 C 30 0 F The chiller can be started after the temperature increases to gt 1 1 C 30 0 F and the COMPRESSOR switch is placed in the Stop Reset O position OIL HIGH TEMPERATURE The oil temperature as sensed by the Oil Temperature Thermistor has increased to gt 76 7 C 170 0 F The chiller can be started after the temperature decreases to lt 76 7 C 170 0 F and the Compressor switch is placed in the Stop Reset O position OIL LOW DIFFERENTIAL PRESSURE The differential oil pressure decreased to lt 138 kPaD 20 0 PSID for 2 continuous seconds after the chiller has been running for gt 3 minutes The differential oil pressure is the difference between the oil pressure as sensed at the inp
127. ys the time remaining in the programmed pulldown period if the value is nonzero 30 PROGRAMMABLE Local Motor Current Limit Access Level Required OPERATOR Allows the user to specify the maximum allowed motor current as a percentage of FLA When the motor current reaches this value the slide valve will not be permitted to load further If the motor current rises above this value the slide valve will unload to reduce the current to this value Pulldown Demand Limit Access Level Required OPERATOR Allows the user to specify the current limit value as a percentage of FLA to which the chiller will be limited during the specified pulldown limit time This value will override the Motor Current Limit value during this time period This function is used to provide energy savings following chiller start up Pulldown Demand Time Access Level Required OPERATOR Allows the user to set a period of time for which the pulldown demand limit will be in effect after the chiller starts NAVIGATION Home Access Level Required VIEW Causes an instant return to the Home Screen YNWS 02 GCE 09 09 2 14 MOD B SOLID STATE STARTER SCREEN SYSTEM STATUS SYSTEM RUN SYSTEM DETAILS LEAYING CHILLED LIQUID CONTROL SOLID STATE STARTER SSS SCREEN a EF 4 Starter Model 26L Phase A Phas AB Phase C Bitage 385 385 v Clrrent 449 A 449 A Pamyaratirs Open SCR Shorted SCR saat Disabled Enabled DATE TUME CONTROL

Operating instructions

Contents

Download Pdf Manuals

Related Search

Related Contents