ES Service Information

ES Service Information File In/With: 160.54-M1, 160.54-O1 160.55-M1, 160.55-O1 Equipment Affected: OptiView Panel Software Enhancement - OptiSave VSD Software Feature SI0068 New 1-04 YK & YT Chillers with OptiView Control Panels & VSD SI0068 (104) Contents OptiSave General Overview Page 1 OptiSave Installation Instructions Page 2 OptiSave Operation Overview Page 5 OptiSave Data Input, Programmable, Derived Page 11 OptiSave YorkTalk3 Parameters Page 12 OptiSave Trend or Custom Screen Slot Number Page 12 OptiSave Reports Page 12-15 OptiSave Feature Screens, Manual Supplements YT Home Screen Page 16 YT Operations Screen Page 18 YK Home Screen Page 20 YK Operations Screen Page 23 YT & YK Motor/Variable Speed Drive Screen Page 25 OptiSave Energy Analyzer Screen Page 27 OptiSave Graph Screen Page 29 OptiSave Energy Analyzer Data Screen Page 30 General Overview The OptiSave Energy Analyzer feature calculates the amount of energy that has been saved in applying a variable speed drive versus a constant speed drive on a centrifugal YT or YK chiller. The savings is determined by calculating the energy consumption of a constant speed drive (displayed via CSD kwh Meter), and subtracting the measured energy consumption of the variable speed drive (displayed via VSD kwh Meter). The resulting difference is the energy savings. The OptiSave feature only generates data that is displayed and written to the BRAM, it does not affect chiller operation or performance. The energy consumption of the constant speed drive is calculated by using equations that have been developed to provide an equivalent constant speed operating point based on the Input Power (VSD kw) of the variable speed drive and the Return Chilled Liquid Temperature. The Chiller OptiView Software is shipped with the OptiSave feature disabled. The commissioning service technician may enable the OptiSave feature, if desired, by contacting Service Marketing (717.771.6863) to obtain the following necessary installation and setup information: Admin. Password, specific to Software Version Chiller VSD Design kw, specific to chiller Chiller CSD Design kw, specific to chiller References OptiSave Marketing Overview YT OptiView Control Center Operation & Maintenance YT OptiView Control Center Service Instructions YK OptiView Control Center Operation & Maintenance YK OptiView Control Center Service Instructions 050.00-SG2 160.55-O1 160.55-M1 160.54-O1 160.54-M1 Engineered Systems Group Product Service

SI0068 (104) OPTISAVE INSTALLATION Required for OptiSave installation: Administrator (Admin.) Access Level Password provided by Service Marketing or Product Service, specific to Software Version. Price Per kwh - provided by Service Sales, OptiSave Contract Specified Blended Utility kwh rate in U.S. Dollars (USD) as $0.00. VSD Design kwh - provided by Service Marketing, specific to Chiller. CSD Design kwh - provided by Service Marketing, specific to Chiller. It is recommended that the ACC EPROM software be the most current Version when installing the OptiSave software. Verify that the ACC EPROM is the most current software version - if not, update the ACC EPROM when installing the OptiSave software program. 1. Secure Chiller If chiller is running, shut down the chiller and allow post lube to time out. Secure the chiller by placing the OptiView panel manual Start/Stop control switch in the STOP (O) position. 2. Replace Software Program a. Remove power supply to VSD and control power to OptiView control panel via VSD disconnect or breaker. Remove preexisting Software Program from OptiView panel microboard. Install new Software Program with OptiSave program functionality: YT Chiller OptiSave Feature Microboards and Software Programs 031-01730-000 Microboard - Program Versions and Part Numbers: C.MLM.02.05.105 and later (NEMA 1-4 chillers P/N 031-02004-001) C.MLM.02.05.204 and later (CE Chillers P/N 031-02004-002) 031-02430-000 Microboard - Program Versions and Part Numbers: C.OPT.02.05A.301 and later (NEMA 1-4 & CE Chillers P/N 031-02469-001) YK Chiller OptiSave Feature Microboards and Software Programs 031-01730-000 Microboard Versions and Part Numbers: C.MLM.01.09.106 and later (NEMA 1-4 Chillers P/N 031-01797-001) C.MLM.01.09.207 and later (CE Chillers P/N 031-01797-002) 031-02430-000 Microboard Versions and Part Numbers: C.OPT.01.09A.301 and later (NEMA 1-4 & CE Chillers P/N 031-02474-001) b. Reapply the 115-vac control power to OptiView control panel and observe/verify software boot-up process to the Home Screen at the View access level. 3. Enable the OptiSave Feature a. Home Screen - Login with Administrator access level password, provided by Service Marketing (717.771.6863) or contact Aftermarket Product Service (717.771.6865) to request the daily Administrator access level password. The Admin. Password is software specific, you will need to provide the operating program software Version number (C.MLM.xx.yy.zzz) as found on the program card label or as displayed on the Diagnostics Screen (Service access level, navigate - Home > Setpoints > Setup > Diagnostics >), under the Software Versions heading and right of the Controls label. 2 YORK INTERNATIONAL

b. Operations Screen - Enable OptiSave feature, navigate to the Operations Screen (Home > Setpoints > Setup > Operations >), the OptiSave Enable/Disable feature key is located 3 rd from the lower left at the base of the Operations screen. Press the OptiSave setpoint key directly below the OptiSave label that will open the OptiSave Enable/Disable setpoint dialog box. Press the Previous or Next cursor arrow keys to toggle feature selection from the default Disabled to Enabled and then press the üenter check key to activate the OptiSave feature. To verify that the OptiSave feature is active, the setpoint displayed below the OptiSave label will read Enabled. Return to the Home Screen via the Home navigation key. Refer to the YT & YK Operations Screens supplement pages. 4. Programming the OptiSave Setpoints a. OptiSave Energy Analyzer Screen - Navigate to the new OptiSave Energy Analyzer screen (Home > Motor > OptiSave>). From the Home screen, navigate to the Motor screen. With the OptiSave feature Enabled there is a new OptiSave navigation key at the lower right of the Motor screen, press the OptiSave navigation key to the right of the OptiSave label. The new OptiSave Energy Analyzer screen has the following programmable setpoints displayed along the right side of the OptiSave screen: Price Per kwh, Home Screen Display, CSD Design kwh & VSD Design kwh. Refer to the OptiSave Energy Analyzer Screen supplement page. Refer to the OptiSave Setpoint Data and Calculated Data sections. b. Price Per kwh - Access level Service or higher to modify this setpoint. Press the setpoint key to right of the Price Per kwh label that will open the setpoint dialog box. Enter the OptiSave contract specified blended utility Price Per kwh in USD (0.00) format via the numeric keypad and then press the ü Enter check key. Verify that the programmed value has been accepted and is displayed to the right of the setpoint label. The minimum allowed value is 0.00 USD, the maximum allowed value is 9.99 USD, and the default value is 0.00 USD. If the Price Per kwh equals zero (0), the total USD savings will not be calculated or displayed. c. Home Screen Display Mode of Total Savings - Access level Service or higher to modify this setpoint. Press the setpoint key to right of the Home Screen Display label that will open the setpoint selection dialog box. Press the Previous or Next cursor arrow keys to toggle selection between the Energy (kwh) or USD (0.00) display modes and then press the ü Enter check key to activate the selected Total Savings mode displayed on the Home Screen. Verify that the programmed value has been accepted and is displayed to the right of the setpoint label. The default is Total Savings in USD (0.00). If the Price Per kwh is zero (0.00), the Total Energy Saved (kwh) shall be displayed on the Home Screen, regardless of the display mode selected, and the Total Savings in USD will not be calculated. d. CSD Design kw - Access level Administrator to modify this setpoint. Press the setpoint key to right of the CSD Design kw label that will open the setpoint dialog box. Enter the chiller specific CSD Design kw, provided by Service Marketing, via the numeric keypad and then press the ü Enter check key. Verify that the programmed value has been accepted and is displayed to the right of the setpoint label. The minimum allowed value is 0 kw, the maximum allowed value is 3000 kw, and the default value is 0 kw. If the CSD Design kw is 0 kw, the OptiSave feature will not function. e. VSD Design kw - Access level Administrator to modify this setpoint. Press the setpoint key to right of the VSD Design kw label that will open the setpoint dialog box. Enter the chiller specific VSD Design kw, provided by Service Marketing, via the numeric keypad and then press the ü Enter check key. Verify that the programmed value has been accepted and is displayed to the right of the setpoint label. The minimum allowed value is 0 kw, the maximum allowed value is 3000 kw, and the default value is 0 kw. If the VSD Design kw is 0 kw, the OptiSave feature will not function. f. VSD kwh Reset of the Variable Speed Meter - Access level Administrator to modify this setpoint. Resetting of the VSD kwh Meter is done ONLY when the OptiSave feature is first activated to clear any previous Variable Speed Meter kwh data and synchronize the Constant Speed and Variable YORK INTERNATIONAL 3

SI0068 (104) Speed Meters displays at zero (0). Press the setpoint key below the VSD kwh Reset label, 2 nd from lower left at the base of the screen, that will open the setpoint dialog box. Press the Default cursor arrow key to reset the Variable Speed Meter to zero (0) kwh and then press the ü Enter check key. Verify that the programmed value has been accepted and that zero (0) kwh is displayed to the left of the Variable Speed Meter display label. The minimum allowed value s 0 kw, the maximum allowed value is 999999 kw, and the default value is 0 kw g. Reverify that the above programmed setpoints are correctly displayed on the OptiSave Energy Analyzer screen and that the following displayed data are at zero (0): Constant Speed Meter, Variable Speed Meter, Last Full Calendar Month Savings & Total Energy Savings. Refer to the OptiSave Energy Analyzer Screen supplemental page. h. Return to the Home Screen via the Home navigation key. 5. Completing OptiSave Feature Setup a. Home Screen Verify that the OptiSave Total Savings label and data are displayed on the Home Screen, upper left above % Full Load Amps, in the mode (kwh or USD) as programmed in step 3.c and that the displayed value is zero. Refer to the Home Screens supplemental pages. b. Logout of the Administrator access level by pressing the key below the Logout label 3 rd from the lower left at the base of the screen. Verify access level is View. OptiSave installation is completed. 6. Verification of OptiSave Operation Access Level Required: View, Operator, or Service a. Verify OptiSave functionality by starting the chiller and returning it to normal operation for at least 30 minutes of run time. Home Screen- Monitor the displayed Total Savings value. (3) OptiSave Energy Analyzer Screen - (Home > Motor > OptiSave >) Monitor the following displayed values: Return Condenser Liquid Temperature (Input) (1) Input Power (Input) (2) Constant Speed Meter (3) Variable Speed Meter (2) Last Full Calendar Month Minimum Return Condenser Liquid Temperature (1) Last Full Calendar Month Savings (4) Total Energy Savings (3) Energy Cost USD per kwh (5). Total Savings USD (3) (1) Actual input value from Temperature Sensor. (2) Actual input value from VSD or Harmonic Filter. (3) Calculated Value, increments during chiller VSD operation. (4) Calculated value, increments >0 after first operating month. (5) Setpoint programmed value. OptiSave Energy Analyzer Graph Screen - (Home > Motor > OptiSave > Graph) Navigate to OptiSave Energy Analyzer Graph screen by pressing the Graph navigation key at the lower right of the OptiSave Energy Analyzer screen. Verify the OptiSave Energy Analyzer Graph screen operation by monitoring the CSD kwh and VSD kwh bars rising from the base of the graph it may take 20 or more minutes of run time for the graph bars to begin displaying. 4 YORK INTERNATIONAL

b. OptiSave Energy Analyzer Report Printing Verification Access level Operator or higher to print. If a printer has been setup for and is connected to the OptiView panel the OptiSave Energy Analyzer Report shall be available via the Print key on the OptiSave Energy Analyzer Screen. The OptiSave Energy Analyzer Report is a manual print report that is not available for Data Logging setup as an automatic printing report. See the REPORTS section for an example of the full data provided in this report. Refer to the Printer Section of the YT (160.55-O1) and YK (160.54-O1) Operating & Maintenance Manuals. c. OPTISAVE YorkTalk3 MicroGateway Verification - The OptiSave points available as YorkTalk3 data points are listed in the YT3 Object Type.Slot column of the input data tables in the OPTISAVE INPUT DATA section. For further York Talk3 and MicroGateway information, contact your local YORK Controls personnel. If you have questions or comments regarding the OptiSave software feature, contact: YORK Service Marketing (717.771.6863) or YORK Aftermarket Product Service (717.771.6865) OPTISAVE OPERATION OVERVIEW OPTISAVE Input Data Return Condenser Liquid Temperature This data is read from Return Condenser Liquid thermistor with a range of 8.0 F to 133.5 F. Displayed on the OptiSave Energy Analyzer screen. Not printed in the OptiSave Energy Anaylzer report. YT3 Object Type.Slot is A1.4 RCNDL.Temp. Trend or Custom Screen Slot Number is 2051. VSD Input Power kw This data is supplied by the Variable Speed Drive or the optional Harmonic Filter, and is transmitted to the OptiView Chiller Control Panel once every two seconds. The range is 0 kw to 3020 kw. Displayed on the Opti- Save Energy Analyzer screen. Printed in the OptiSave Energy Analyzer report. YT3 Object Type.Slot is AV.71 VSD.INP.PWR. Trend or Custom Screen Slot Number is 2818. Coefficients The coefficients used in the OptiSave calculations are based on hundreds of random operating points having been derived from a representative number of chiller tonnages for each YT & YK chiller line. OPTISAVE SETPOINT DATA All OptiSave setpoint values are written to the BRAM. Enable / Disable OptiSave Feature Select to Enable or Disable the OptiSave feature. The Access level is Administrator to modify this setpoint. The default value is Disabled. If the OptiSave feature is Disabled, the navigation key on the Motor Screen to jump to the OptiSave Energy Analyzer Screen shall be disabled. YT3 Object Type.Slot is AO.31 OS.ENABLE. Trend or Custom Screen Slot Number is 3840. If the feature is Enabled, but the VSD Design kw or the CSD Design kw equals zero (0) the feature will not function. If the Price Per kwh equals zero (0), the total USD savings will not be calculated or displayed. Displayed on the Operations screen. Not printed in the OptiSave Energy Analyzer report. Price Per kwh Enter the OptiSave contract specified blended utility Price Per kwh. The Access Level is Service or higher to modify this setpoint. The minimum allowed value is 0.00 USD, the maximum allowed value is 9.99 USD, and the YORK INTERNATIONAL 5

default value is 0.00 USD. If the Price Per kwh equals zero (0), the total USD savings will not be calculated or displayed. Displayed on the OptiSave Energy Analyzer screen. Printed in the OptiSave Energy Analyzer Setpoints report. YT3 Object Type.Slot is AO.34 OS.PRICE.KWH. Trend or Custom Screen Slot Number is 3846. CSD Design kw Enter the chiller specific CSD Design kw as provided by York Service Marketing at the time of chiller or VSD commissioning. The Access Level shall be Administrator in order to modify this setpoint. The minimum allowed value is 0 kw, the maximum allowed value is 3000 kw, and the default value is 0 kw. If the CSD Design kw is 0 kw, the OptiSave feature will not function. Displayed on the OptiSave Energy Analyzer screen. Printed in the OptiSave Energy Analyzer Setpoints report. YT3 Object Type.Slot is AO.33 OS.CSD.DESGN. Trend or Custom Screen Slot Number is 3844. VSD Design kw Enter the chiller specific VSD Design kw as provided by York Service Marketing at the time of chiller or VSD commissioning. The Access Level is Administrator to modify this setpoint. The minimum allowed value is 0 kw, the maximum allowed value is 3000 kw, and the default value is 0 kw. If the VSD Design kw is 0 kw, the OptiSave feature will not function. Displayed on the OptiSave Energy Analyzer Setpoints screen. Printed in the OptiSave Energy Analyzer Setpoints report. YT3 Object Type.Slot is AO.32 OS.VSD.DESGN. Trend or Custom Screen Slot Number is 3843. Home Screen Total Savings Display Mode Select either the Total Energy Saved (kwh) or the Total Savings (USD) to be displayed on the Home Screen. The Access Level is Service or higher to modify this setpoint. The default is Total Savings in USD. If the Price Per kwh is zero (0), the Total Energy Saved (kwh) shall be displayed on the Home Screen, regardless of the mode selected, and the Total Savings in USD will not be calculated. Displayed on the OptiSave Energy Analyzer Setpoints screen. Printed in the OptiSave Energy Analyzer Setpoints report. YT3 Object Type.Slot is AO.35 OS.DISP.MODE. Trend or Custom Screen Slot Number is 3847. OPTISAVE CALCULATED DATA The following calculations are performed every two seconds while the chiller is running, if the OptiSave feature is enabled, the VSD Design kw is not zero (0), the CSD Design kw is not zero (0), and the Return Chilled Liquid Temperature sensor is in range: The CSD Input Power The Constant Speed Meter The Total Energy Savings is calculated - the Total Energy Savings is not allowed to exceed ± 999999999 kwh (but will NOT roll over). All OptiSave calculated data values are written to the BRAM including the data index point, the Julian time of the last data point, and the running sum as applicable: Hourly Average Return Condenser Liquid Temperature (x24 hours) The Hourly Return Condenser Liquid Temperature values for the past 24 hours shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Slot Numbers are 3856-3879. Daily Average Return Condenser Liquid Temperature (x30 days) The Daily Average Return Condenser Liquid Temperature values for the past 30 days shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Slot Numbers are 3880-3910. Monthly Average Return Condenser Liquid Temperature (x12 months) The Monthly Average Return Condenser Liquid Temperature values for the past 12 months shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. YT3 Object Type.Slot is AO.6 AO.17 OS.RTCD.Mx. Trend or Custom Screen Slot Numbers are 3911-3922. Yearly Average Return Condenser Liquid Temperature (x20 years) The Yearly Average Return Condenser Liquid Temperature values for the past 20 years shall be stored in BRAM, 6 YORK INTERNATIONAL

using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Slot Numbers are 3923 3942. Hourly Minimum Return Condenser Liquid Temperature (x24 hours) The Return Condenser Liquid Temperature shall be read every second, and compared to the last minimum value. If it is less than the last minimum value, the last minimum value shall be set to the current temperature reading. The Minimum Return Condenser Liquid Temperature value for each of the past 24 hours shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Numbers 3584 3605. Daily Minimum Return Condenser Liquid Temperature (x30 days) When the calendar day changes, the last 24 Hourly Minimum Return Condenser Liquid Temperatures shall be examined for the minimum value for that day. The Minimum Return Condenser Liquid Temperature value for each of the past 30 days shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Numbers 3608 3638. Monthly Minimum Return Condenser Liquid Temperature (x12 months) When the calendar month changes, the last 30 Daily Minimum Return Condenser Liquid Temperatures shall be examined for the minimum value for that month. The Minimum Return Condenser Liquid Temperature value for each of the past 12 months shall be stored in BRAM, using a FIFO scheme. Displayed on the OptiSave Energy Analyzer Screen. Printed in the OptiSave Energy Analyzer report. YT3 Object Type.Slot is AO.36-AO.47 OS.MRTCD.Mx. Trend or Custom Screen Numbers 3639 3850. Yearly Minimum Return Condenser Liquid Temperature (x20 years) When the calendar year changes, the last 12 Monthly Minimum Return Condenser Liquid Temperatures shall be examined for the minimum value for that year. The Minimum Return Condenser Liquid Temperature value for each of the past 20 years shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Numbers 3651 3670. CSD kwh Meter The cumulative amount of kilowatts (kwh) calculated that would have been used by a Constant Speed motor controller. The CSD kwh Meter cumulative value shall be stored in BRAM and will automatically roll over when it exceeds 999999. The value of the CSD kwh Meter can be modified at the Administrator Access Level on the OptiSave Energy Analyzer Data Screen. Displayed on the OptiSave Energy Analyzer, OptiSave Energy Analyzer Data and the OptiSave Energy Analyzer Graph screens. Printed in the OptiSave Energy Analyzer and the OptiSave Energy Setpoints reports. YT3 Object Type.Slot is AO.4 OS.CSD.KWH. Trend or Custom Screen Slot Number is 3842. VSD kwh Meter The cumulative amount of actual kilowatts (kwh) used as the VSD motor controller operates. The VSD kwh Meter cumulative value shall be stored in BRAM and will automatically roll over when it exceeds 999999. The value of the VSD kwh Meter can be modified at the Administrator Access Level on the OptiSave Energy Analyzer Data Screen. Displayed on the OptiSave Energy Analyzer, the OptiSave Energy Analyzer Data and the OptiSave Energy Analyzer Graph screens. Printed in the OptiSave Energy Analyzer and the OptiSave Energy Analyzer Setpoints reports. YT3 Object Type.Slot is AO.5 OS.VSD.KWH. Trend or Custom Screen Slot Number is 3841. Total Energy Savings The cumulative calculated amount of kwh saved in using a Variable Speed Drive vs. a Constant Speed Drive. The Total Saved Energy cumulative value shall be stored in BRAM, the maximum value that the Total Saved Energy can reach is 999,999,999 kwh for the lifetime of the chiller. The value of the Total Saved Energy can be modified at the Administrator Access Level on the OptiSave Energy Analyzer Data Screen. Displayed on the Home (Energy display mode), the OptiSave Energy Analyzer and the OptiSave Energy Analyzer Data screens. Printed in OptiSave Energy Analyzer and the OptiSave Energy Analyzer Setpoints reports. YT3 Object Type.Slot is AO.2 OS.TOTAL. Trend or Custom Screen Slot Number is 3845. Hourly Total Saved Energy (x24 hours) The Hourly Total Saved Energy values read on every hour for the past 24 hours shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Slot Numbers are 3943-3966. YORK INTERNATIONAL 7

Daily Total Saved Energy (x30 days) The Daily Total Saved Energy values read at midnight of every day for the past 30 days shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Slot Numbers are 3967-3997. Monthly Total Saved Energy (x12 months) The Monthly Total Saved Energy values is constantly updated during the current month until midnight of the last day of the month. The month-end values for every month for the past 12 months shall be stored in BRAM, using a FIFO scheme. The value of the Monthly Total Saved Energy for the preceding 11 months can be modified at the Administrator Access Level on the OptiSave Energy Analyzer Data Screen. Printed in the OptiSave Energy Analyzer and the OptiSave Energy Analyzer Setpoints reports. YT3 Object Type.Slot is AO.128 AO.29 OS.ENERGY.Mx. Trend or Custom Screen Slot Numbers are 3998-4009. Yearly Total Saved Energy (x20 years) The Yearly Total Saved Energy values read at midnight of the last day of every year for the past 20 years shall be stored in BRAM, using a FIFO scheme. Printed in the OptiSave Energy Analyzer report. Trend or Custom Screen Slot Numbers are 4010-4029. Total Savings In USD The Total Saved Energy shall be multiplied by the Cost Per kwh to compute the Total Savings in USD. Displayed on the Home (Savings display mode) and OptiSave Energy Analyzer screens. Printed in OptiSave Energy Analyzer report. YT3 Object Type.Slot is AO.3 OS.DOLLARS. Trend or Custom Screen Slot Number is 3849. Last Full Calendar Month Savings Value of the Monthly Total Saved Energy for the month prior to the present month. Displayed on the Opti- Save Energy Analyzer Screen. Printed in the OptiSave Energy Analyzer report. YT3 Object Type.Slot is AO.30 OS.ENRGY.ML. Trend or Custom Screen Number 4066. Last Full Calendar Month Minimum Return Condenser Liquid Temperature Value of the Monthly Minimum Return Condenser Liquid Temperature for the month prior to the present month. Displayed on the OptiSave Energy Analyzer Screen. Printed in the OptiSave Energy Analyzer report. YT3 Object Type.Slot is AO.48 OS.MRTCD.ML. Trend or Custom Screen Number 3671. OPTISAVE DATA RESETS CSD kwh Reset Allows user to modify the cumulative Constant Speed Meter value. The Access Level shall be Administrator in order to modify this value. Used when BRAM is replaced or cleared to manually reenter prior value. Do Not Reset arbitrarily OptiSave data may be compromised. Modified on the OptiSave Energy Analyzer Data screen. Press the setpoint key below the CSD kwh Reset label, 1 st from lower left at the base of the screen, that will open the setpoint dialog box. Enter the desired Constant Speed Meter value (kwh) via the numeric keypad and then press the PEnter check key. Verify that the programmed value has been accepted and is displayed to the left of the Constant Speed Meter display label. The minimum allowed value is 0 kwh, the maximum allowed value is 999999 kwh, and the default value is 0 kwh. VSD kwh Reset Allows user to modify the cumulative Variable Speed Meter value. The Access Level shall be Administrator in order to modify this value. Used when BRAM is replaced or cleared to manually reenter prior value. Do Not Reset arbitrarily OptiSave data may be compromised. Modified on the OptiSave Energy Analyzer Data screen. Press the setpoint key below the VSD kwh Reset label, 2 nd from lower left at the base of the screen, that will open the setpoint dialog box. Enter the desired Variable Speed Meter value (kwh) via the numeric keypad and then press the Enter check key. Verify that the programmed value has been accepted and is displayed to the left of the Variable Speed Meter display label. The minimum allowed value is 0 kwh, the maximum allowed value is 999999 kwh, and the default value is 0 kwh. Total Savings Reset Allows user to modify the cumulative Total Energy Savings value. The Access Level shall be Administrator in order to modify this value. Used when BRAM is replaced or cleared to manually reenter prior value. Do 8 YORK INTERNATIONAL

Not Reset arbitrarily OptiSave data may be compromised. Modified on the OptiSave Energy Analyzer Data screen. The CSD Design kw and VSD Design kw Setpoints must be programmed prior to resetting the Total Savings. If either the CSD Design or VSD Design kw value is zero the Total Savings value cannot be reset. Press the setpoint key below the Total Savings Reset label, 3 rd from lower left at the base of the screen, that will open the setpoint dialog box. Enter the desired Total Savings value (kwh) via the numeric keypad and then press the PEnter check key. Verify that the programmed value has been accepted and is displayed to the left of the Total Energy Savings display label. The minimum allowed value is -214748364 kwh, the maximum allowed value is 214748364 kwh, and the default value is 0 kwh. Monthly Total Saved Energy Meter (x11 months) Allows user to modify the cumulative Monthly Total Saved Energy Meter values for the preceding 11 months. The current Month Savings cannot be modified. The Access Level shall be Administrator in order to modify these values. Used when BRAM is replaced or cleared to manually reenter prior value. Do Not Reset arbitrarily OptiSave data may be compromised. Modified on the OptiSave Energy Analyzer Data screen. Press the setpoint key to the right of the Select label, 3 rd from the top at the right side of the screen, that will open a Green cursor box around the upper (current Month) Monthly Total Energy Meter Reading value box. Press the Up or Down cursor arrow keys to move the Green cursor box to the desired Month value to be modified. Press the PEnter check key to open the value selection dialog box. Enter the desired Month Total Energy Meter value (kwh) via the numeric keypad and then press the PEnter check key. Verify that the programmed value has been accepted and is displayed to the right of the selected Month display label. Repeat as required to select and reset the Monthly Total Energy Meter Reading values. The minimum allowed value s -999999999 kwh, the maximum allowed value is 999999999 kwh, and the default value is 0 kwh. Press the Ñ Cancel cursor key to exit the Monthly Total Energy Meter Reading reset mode. COMPLETE OPTISAVE DATA RESETS Logout of the Administrator access level by pressing the key below the Logout label 3 rd from the lower left at the base of the Home screen. Verify access level is View. OPTISAVE CONTROLS Data Corrections On Power Up The hourly, daily, monthly, and yearly averages and totals are adjusted for any time that has elapsed while the control panel was powered off. Array points corresponding to the time during which the panel was powered off are filled with default data. Data Corrections When The Time Or Date Are Modified Because the hourly, daily, monthly, and yearly averages and totals are performed based on calendar time, adjustments are made if the user changes the time or date of the control panel. To limit the effect of changing the time and/or date, twice the required array elements are stored (i.e. save 48 hours, 60 days, 24 months, etc.) in a circular queue. The head of the queue is moved so that it points to the element whose Julian date stamp most closely matches the time and date currently read from the panel. However, it is still possible that data may be lost with this method. In the case of lost data, those array elements are filled with default data. Do Not Reset Time or Date arbitrarily, OptiSave data may be compromised. BRAM Replacement or Clearing If the microboard BRAM is replaced or is cleared, the following OptiSave setpoints and data would need to be manually captured prior to the BRAM being replaced or cleared and re-entered afterward from the OptiSave Energy Analyzer and OptiSave Energy Analyzer Data screens: Enable OptiSave Price Per kwh VSD Design kw CSD Design kw YORK INTERNATIONAL 9

Home Screen Display VSD kwh Meter CSD kwh Meter Total Saved Energy Monthly Total Energy Saved Meter (x12 months) The above setpoint values, except Enable OptiSave, may be captured via the OptiSave Energy Analyzer Setpoints print report or read from the OptiSave Energy Analyzer Data screen at the Administrator access level. The following OptiSave information stored in BRAM would be permanently lost: Hourly Average Return Condenser Liquid Temperature (x24 hours) Daily Average Return Condenser Liquid Temperature (x30 days) Monthly Average Return Condenser Liquid Temperature (x12 months) Yearly Average Return Condenser Liquid Temperature (x20 years) Hourly Minimum Return Condenser Liquid Temperature (x24 hours) Daily Minimum Return Condenser Liquid Temperature (x30 days) Monthly Minimum Return Condenser Liquid Temperature (x12 months) Yearly Minimum Return Condenser Liquid Temperature (x20 years) Hourly Total Saved Energy (x24 hours) Daily Total Saved Energy (x30 days) Yearly Total Saved Energy (x20 years) Last Full Calendar Month Savings Last Full Calendar Month Minimum Return Condenser Liquid Temperature The above data will again begin to be recalculated and stored in BRAM afterward and going forward. Do Not replace or clear BRAM arbitrarily, OptiSave data may be compromised. Software Program Software Replacement Installing an earlier software program without the OptiSave feature: OptiSave specific data values are written to the BRAM. Should an OptiSave featured software program be replaced with an earlier non-optisave software version the OptiSave feature will not be available. The OptiSave data values previously stored in the BRAM will remain intact at the point when the OptiSave featured software was removed. OptiSave data will not be calculated or updated while the non-optisave software version is installed. Should a later OptiSave featured software program be reinstalled and the OptiSave feature re-enabled the prior OptiSave data in the BRAM will be read by the software and displayed on the OptiSave Energy Analyzer screen. The OptiSave data will be calculated and incremented going forward as the VSD motor controller operates and the OptiSave feature is Enabled. Installing a later OptiSave featured software program: OptiSave specific data values are written to the BRAM. Should a later version OptiSave featured software program be installed the prior OptiSave data in the BRAM will be read by the software and displayed on the OptiSave Energy Analyzer screen. Manual re-enabling of the OptiView feature is unnecessary as later version OptiView featured software will recognize the OptiSave feature was previously enabled. The OptiSave data will be calculated and incremented going forward as the VSD motor controller operates and the OptiSave feature is Enabled. 10 YORK INTERNATIONAL

OPTISAVE DATA Input Data - Analog Title Lowest Displayed Value Highest Displayed Value Return Condenser Liquid Temperature 8.0 F 133.5 F Input Data Serial Communications Title Lowest Displayed Value Highest Displayed Value VSD Input Power 0 kw 65535 kw Programmable Data Lowest Highest Access Level Default Title Allowed Value Allowed Value Total Energy Savings Administrator 0 kwh -999999999 kwh 999999999 kwh Constant Speed Meter Administrator 0 kwh 0 kwh 999999 kwh Variable Speed Meter Administrator 0 kwh 0 kwh 999999 kwh OptiSave [Enable] Administrator Disabled Disabled à Enabled VSD Design kw Administrator 0 kw 0 kw 3000 kw CSD Design kw Administrator 0 kw 0 kw 3000 kw Price Per kwh Service 0.00 USD 0.00 USD 9.99 USD Home Screen Display Service Dollars Energy (kwh) à Dollars (USD) YT3 Object Type.Slot AI.4 RCNDL.TEMP YT3 Object Type.Slot AV.71 VSD.INP.PWR YT3 Object Type.Slot AO.2 OS.TOTAL AO.4 OS.CSD.KWH AO.5 OS.VSD.KWH AO.31 OS.ENABLE AO.32 OS.VSD.DESGN AO.33 OS.CSD.DESGN AO.34 OS.PRICE.KWH AO.35 OS.DISP.MODE Derived Data Title Lowest Highest Displayed YT3 Object Displayed Value Value Type.Slot Total Energy Savings -999999999 kwh 999999999 kwh AO.2 OS.TOTAL Total Savings In USD -9999999.99 USD 9999999.99 USD AO.3 OS.DOLLARS Constant Speed Meter 0 kwh 999999 kwh AO.4 OS.CSD.KWH Variable Speed Meter 0 kwh 999999 kwh AO.5 OS.VSD.KWH Hourly Average Return Condenser Liquid Temperature (x24 hours) 8.0 F 133.5 F Not Available Daily Average Return Condenser Liquid Temperature (x31 days) 8.0 F 133.5 F Not Available Monthly Average Return Condenser Liquid AO.6 - AO.17 8.0 F 133.5 F Temperature (x12 months) OS.RTCD.Mx Yearly Average Return Condenser Liquid Temperature (x20 years) 8.0 F 133.5 F Not Available Hourly Minimum Return Condenser Liquid Temperature (x24 hours) 8.0 F 133.5 F Not Available Daily Minimum Return Condenser Liquid Temperature (x31 days) 8.0 F 133.5 F Not Available Monthly Minimum Return Condenser Liquid AO.36 - AO.47 8.0 F 133.5 F Temperature (x12 months) OS.MRTCD.Mx Yearly Minimum Return Condenser Liquid Temperature (x20 years) 8.0 F 133.5 F Not Available Hourly Total Saved Energy (x24 hours) -999999999 kwh 999999999 kwh Not Available Daily Total Saved Energy (x31 days) -999999999 kwh 999999999 kwh Not Available AO.18 - AO.29 Monthly Total Saved Energy (x12 months) -999999999 kwh 999999999 kwh OS.ENRGY.Mx Yearly Total Saved Energy (x20 years) -999999999 kwh 999999999 kwh Not Available AO.30 Last Full Calendar Month Savings -999999999 kwh 999999999 kwh OS.ENRGY.ML Last Full Calendar Month Minimum Return Condenser AO.48 8.0 F 133.5 F Liquid Temperature OS.MRTCD.ML YORK INTERNATIONAL 11

OPTISAVE YORKTALK3 PARAMETERS The OptiSave points available as YorkTalk3 data points are listed in the preceding OptiSave data tables in the YT3 Object Type.Slot column. While the communications protocol is not limited to a specific number of digits that can be transmitted, the ISN Panel Display is limited to 4 numeric positions. OPTISAVE TREND OR CUSTOM SCREEN SLOT NUMBERS DESCRIPTION OPTISAVE SLOT # Constant Speed Meter 3842 CSD Design kw 3844 CSD Input Power 3850 Daily Average Return Condenser Liquid Temperature (x31 days) 3880-3910 Daily Total Saved Energy (x31 days) 3967-3997 Daily Total Saved Energy (x31 days) 3967-3997 Home Screen Display 3847 Hourly Average Return Condenser Liquid Temperature (x24 hours) 3856-3879 Hourly Minimum Return Condenser Liquid Temperature (x24 hours) 3584-3605 Hourly Total Saved Energy (x24 hours) 3943-3966 Last Full Calendar Month Savings 4066 Last Full Calendar Month Minimum Return Condenser Liquid Temperature 3671 Monthly Average Return Condenser Liquid Temperature (x12 months) 3911-3922 Monthly Minimum Return Condenser Liquid Temperature (x12 months) 3639-3850 Monthly Total Saved Energy (x12 months) 3998-4009 OptiSave [Enable] 3840 Price Per kwh 3846 Return Condenser Liquid Temperature 2051 Total Energy Savings 3845 Total Savings In USD 3849 Variable Speed Meter 3841 VSD Design kw 3843 VSD Input Power 2818 Yearly Average Return Condenser Liquid Temperature (x20 years) 3923-3942 Yearly Minimum Return Condenser Liquid Temperature (x20 years) 3651-3670 Yearly Total Saved Energy (x20 years) 4010-4029 REPORTS Setpoint Report The following OptiSave setpoints are included in the Setpoint Report, if the OptiSave feature is enabled: OptiSave [Enable] VSD Design kw CSD Design kw Price Per kwh Home Screen Display 12 YORK INTERNATIONAL

Slot List Report The following OptiSave slots are included in the Slot List Report, if the OptiSave feature is enabled: Constant Speed Meter Variable Speed Meter Total Energy Savings Total Savings In USD Last Full Calendar Month Savings Last Full Calendar Month Minimum Return Condenser Liquid Temperature OptiSave Energy Analyzer Report This report is available manually via the Print key on the OptiSave Energy Analyzer Screen at the Operator or higher access level. The OptiSave Energy Analyzer Report prints the following information: YORK OptiSave Energy Analyzer Report Chiller ID 0 (c) 1997-2003 YORK INTERNATIONAL CORPORATION Mon 24 Feb 2003 8:50:45 AM Controls C.MLM.02.05.105 Run Time 0 Days 2 Hr 59 Min Operating Hours = 25 Hr Number Of Starts = 6 Input Power = 68 KW Variable Speed Meter = 47911 KWH CSD Input Power = 74 KW Constant Speed Meter = 59889 KWH Total Energy Savings = 11978 KWH Total Dollar Savings = 838.46 USD Last Full Calendar Month Savings = 0 KWH Last Full Calendar Month Minimum Return Con = 65.0 ~F Hourly Average Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 24 Feb 2003 7:59:59 AM = 65.0 ~F 24 Feb 2003 6:59:59 AM = 65.0 ~F Daily Average Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 23 Feb 2003 11:59:59 PM = 65.0 ~F 22 Feb 2003 11:59:59 PM = 65.0 ~F Monthly Average Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 31 Jan 2003 11:59:59 PM = 65.0 ~F 31 Dec 2002 11:59:59 PM = 65.0 ~F Yearly Average Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 31 Dec 2002 11:59:59 PM = 65.0 ~F 31 Dec 2001 11:59:59 PM = 65.0 ~F Hourly Minimum Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 24 Feb 2003 7:59:59 AM = 65.0 ~F 24 Feb 2003 6:59:59 AM = 65.0 ~F YORK INTERNATIONAL 13

OptiSave Energy Analyzer Report - Continued Daily Minimum Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 23 Feb 2003 11:59:59 PM = 65.0 ~F 22 Feb 2003 11:59:59 PM = 65.0 ~F Monthly Minimum Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 31 Jan 2003 11:59:59 PM = 65.0 ~F 31 Dec 2002 11:59:59 PM = 65.0 ~F Yearly Minimum Return Condenser Liquid Temperature -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 65.0 ~F 31 Dec 2002 11:59:59 PM = 65.0 ~F 31 Dec 2001 11:59:59 PM = 65.0 ~F Hourly Total Saved Energy -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 452 KWH 24 Feb 2003 7:59:59 AM = 452 KWH 24 Feb 2003 6:59:59 AM = 452 KWH Daily Total Saved Energy -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 1848 KWH 23 Feb 2003 11:59:59 PM = 1848 KWH 22 Feb 2003 11:59:59 PM = 1848 KWH Monthly Total Saved Energy -------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 52000 KWH 31 Jan 2003 11:59:59 PM = 52000 KWH 31 Dec 2002 11:59:59 PM = 52000 KWH Yearly Total Saved Energy --------------------------------------------------------- 24 Feb 2003 8:50:45 AM = 100000 KWH 31 Dec 2002 11:59:59 PM = 100000 KWH 31 Dec 2001 11:59:59 PM = 100000 KWH 14 YORK INTERNATIONAL

OptiSave Energy Analyzer Setpoints Report This report is available manually via the Print key on the OptiSave Energy Analyzer Data Screen - at the Administrator access level. The OptiSave Energy Analyzer Setpoints Report prints the following information: YORK OptiSave Energy Analyzer Setpoints Report Chiller ID 0 (c) 1997-2003 YORK INTERNATIONAL CORPORATION Mon 24 Feb 2003 8:50:45 AM Controls C.MLM.02.05.105 -------------------------------------------------------- CSD Design KWH = 129 KWH VSD Design KWH = 134 KWH Price Per KWH = 0.05 USD Home Screen Display = Energy Constant Speed Meter Variable Speed Meter Total Energy Savings = 10489 KWH = 8978 KWH = 1511 KWH Feb = 000 KWH Jan = 679 KWH Dec = 159 KWH Nov = 079 KWH OCT = 000 KWH Sep = 000 KWH Aug = 000 KWH Jul = 000 KWH JUN = 000 KWH May = 000 KWH Apr = 000 KWH Mar = 000 KWH YORK INTERNATIONAL 15

HOME SCREEN YT OPTISAVE "OptiSave" Total Savings Data Display OVERVIEW When the chiller system is powered on, the above default display appears. The primary values which must be monitored and controlled are shown on this screen. The Home Screen display depicts a visual representation of the chiller itself. Animation indicates chilled liquid 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 Variable Speed Drive motor controller or Mod B Solid State Starter. This displays the total input power used by the system. Total Savings (Software versions C.MLM.02.05.xxx or C.OPT.02.05A.xxx and later) Available only if utilizing a Variable Speed Drive motor controller and the OptiSave feature is enabled. Displays the OptiSave calculated VSD Total Savings as Energy (kwh) or Dollars (USD). The data type displayed is determined by the OptiSave Home Screen Total Savings Display Mode and Price Per kwh setpoints. % 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 16 YORK INTERNATIONAL

The Control Center restricts certain operations based on password entry by the operator. Three different access levels are provided as follows: VIEW: The panel defaults to the lowest access level which is termed VIEW. In this mode, the chiller operating values and setpoints can be observed, but no changes can be made. OPERATOR: The second access level is termed OPERATOR and will allow the customer to change all of the setpoints required to operate the chiller system. The OPERATOR access level reverts to the VIEW level after 10 continuous minutes without a keypress. SERVICE: In the event that advanced diagnostics are necessary, a SERVICE access level has been provided. 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 timeout. After ten (10) successive minutes without a keypress, the panel will revert to the VIEW access level. This prevents unauthorized changes to the chiller if a user was logged in at a higher access level and failed to logout. Proper procedure requires that after making necessary setpoint adjustments the user return to the Home Screen and logout. Logout Access Level Required: OPERATOR This key is displayed when a user is logged in at any level other than VIEW. Pressing it will return the access level to VIEW. Print Use this key to generate a hard-copy report of the present system status. This provides a snapshot of the primary operating conditions at the time the key is pressed. The History page provides enhanced reporting capability. (See HISTORY below.) This option will not be present if the chiller is presently configured to log any incoming Adaptive Capacity Control map points. (See the Adaptive Capacity Control Details screen.) Message Clear Access Level Required: SERVICE When certain safety or cycling conditions have been detected and the chiller has been shutdown, the main status display of the chiller will continue to display a message indicating the cause of the shutdown. Using this key, the message can be cleared once the condition has been removed. Warning Reset Access Level Required: OPERATOR Use of this key acknowledges a warning condition and resets the message display associated with it. 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, including control of the purge functions. Compressor A detailed view of all the compressor parameters. This includes pre-rotation vane control, Hot Gas Bypass Control and PRV calibration. Oil Sump A detailed view of all the oil pump and oil sump parameters. Motor A detailed view of the motor controller parameters, specific to the controller type presently utilized on the chiller system. This allows programming of the Current Limit and the Pulldown Demand Limit values. For a VSD system, the Adaptive Capacity Control and Harmonic Filter and OptiSave feature information is controlled under this screen. Setpoints This screen provides a single location to program the most common system setpoints. It is also the gateway to many of the general system setup parameters such as Date/Time, Display Units, Scheduling, Printer Setup, etc. History This screen provides access to a snapshot of system data at each of the last 10 shutdown conditions. OVERVIEW This screen allows definition of general parameters having to do with the operation of the chiller. YORK INTERNATIONAL 17

OPERATIONS SCREEN YT OPTISAVE "OptiSave" Enabled/Disabled Setpoint DISPLAY ONLY Chiller Run Time (Software version C.MLM.02.01 or later) 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 System Prelube. 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 Microboard replacement), but should not be done so arbitrarily. Operating Hours Access Level Required: ADMIN Displays the total accumulated run time of the chiller. 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. Hot Gas Bypass (Enabled/Disabled) Access level required: SERVICE Enables and disables the hot gas bypass feature. Refrigerant Level Control (Enabled/Disabled) Access Level Required: SERVICE Enables and Disables the Refrigerant Level Control feature. OptiSave VSD Feature (Enabled/Disabled) (Software versions C.MLM.02.05.xxx or C.OPT.02.05A.xxx and later) Access Level Required: ADMIN Available only if utilizing a Variable Speed Drive motor controller. Enables and Disables the OptiSave VSD feature. If the OptiSave feature is Disabled, the OptiSave navigation key on the Motor/VSD Screen is not displayed and the Total Savings will not be displayed on the Home screen. 18 YORK INTERNATIONAL

Service Phone Numbers (Software version C.MLM.02.02.xxx and later) 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 160.55-M1. NAVIGATION Home Causes an instant return to the Home Screen. Setup Return to the Setup Screen. YORK INTERNATIONAL 19

HOME SCREEN YK OPTISAVE "OptiSave" Total Savings Data Display OVERVIEW When the chiller system is powered on, the above default display appears. The primary values which must be monitored and controlled are shown on this screen. The Home Screen display depicts a visual representation of the chiller itself. Animation indicates chilled liquid 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 Variable Speed Drive or Mod B Solid State Starter motor controller. This displays the total input power used by the system. Total Savings (Software versions C.MLM.01.09.xxx or C.OPT.01.09A.xxx and later) Available only if utilizing a Variable Speed Drive motor controller and the OptiSave feature is enabled. Displays the OptiSave calculated VSD Total Savings as Energy (kwh) or Dollars (USD). The data type displayed is determined by the OptiSave Home Screen Total Savings Display Mode and Price Per kwh setpoints. % 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 The OptiView Panel restricts certain operations based on password entry by the operator. Three different ac- 20 YORK INTERNATIONAL

cess levels are provided as follows: VIEW: The panel defaults to the lowest access level which is termed VIEW. In this mode, the chiller operating values and setpoints can be observed, but no changes can be made. OPERATOR: The second access level is termed OPERATOR and will allow the customer to change all of the setpoints required to operate the chiller system. The OPERATOR access level reverts to the VIEW level after 10 continuous minutes without a keypress. SERVICE: In the event that advanced diagnostics are necessary, a SERVICE access level has been provided. 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 timeout. After ten (10) successive minutes without a keypress, the panel will revert to the VIEW access level. This prevents unauthorized changes to the chiller if a user was logged in at a higher access level and failed to logout. Proper procedure requires that after making necessary setpoint adjustments the user return to the Home Screen and logout. Logout Access Level Required: OPERATOR This key is displayed when a user is logged in at any level other than VIEW. Pressing it will return the access level to VIEW. Print Use this key to generate a hard-copy report of the present system status. This provides a snapshot of the primary operating conditions at the time the key is pressed. The History page provides enhanced reporting capability. (See HISTORY below.) This option will not be present if the chiller is presently configured to log any incoming Adaptive Capacity Control map points. (See the Adaptive Capacity Control Details screen.) Message Clear Access Level Required: SERVICE When certain safety or cycling conditions have been detected and the chiller has been shutdown, the main status display of the chiller will continue to display a message indicating the cause of the shutdown. Using this key, the message can be cleared once the condition has been removed. Warning Reset Access Level Required: OPERATOR Use of this key acknowledges a warning condition and resets the message display associated with it. Soft Shutdown (Software version C.MLM.01.06.xxx and later and P compressors with C.MLM.04.02.xxx and later) Access Level Required: Operator This key, available only when the compressor is running, is used to initiate a Soft Shutdown. A Soft Shutdown fully closes the Pre-rotation Vanes prior to shutting down the compressor. This reduces bearing wear by eliminating compressor backspin at shutdown. Pressing this key causes the Vanes to be driven to the fully closed position. While the vanes are closing, Vanes Closing Before Shutdown is displayed on the System Status line. When the Vane Motor Switch (VMS) closes, indicating the vanes have fully closed (or 3.5 minutes have elapsed, whichever occurs first), the Run signal is removed from the compressor motor starter and a System Coastdown is performed. While the vanes are closing, if a Local Stop is initiated with the Compressor Switch or any fault other than Leaving Chilled Liquid Temp Low Temperature, Remote Stop, Multi-Unit Cycling Contacts Open, System Cycling Contacts Open or Control Panel Schedule occur, it will immediately enter System Coastdown. To restart the chiller after an operator initiated Soft shutdown, the Compressor Switch must be placed in the Stop/Reset position () and then the Start position (P). 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, including control of the liquid level functions. Compressor A detailed view of all the compressor parameters. This includes pre-rotation vane control, Hot Gas Bypass Control, Proximity Probe calibration, and PRV calibration. YORK INTERNATIONAL 21

Oil Sump A detailed view of all the oil pump and oil sump parameters. This includes the Variable Speed Oil Pump when installed. It also controls the Seal Lubrication functionality. Motor A detailed view of the motor controller parameters, specific to the controller type presently utilized on the chiller system. This allows programming of the Current Limit and the Pulldown Demand Limit values. For a VSD system, the Adaptive Capacity Control, Harmonic Filter and OptiSave feature information is controlled under this screen. Setpoints This screen provides a single location to program the most common system setpoints. It is also the gateway to many of the general system setup parameters such as Date/Time, Display Units, Scheduling, Printer Setup, etc. History This screen provides access to a snapshot of system data at each of the last 10 shutdown conditions. 22 YORK INTERNATIONAL

OPERATIONS SCREEN YK OPTISAVE "OptiSave" Enabled/Disabled Setpoint OVERVIEW This screen allows definition of general parameters having to do with the operation of the chiller. DISPLAY ONLY Chiller Run Time (If compressor application is other than P, applies only to software version C.MLM.01.04 or later) 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 System Prelube. 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 Microboard replacement), but should not be done so arbitrarily. Operating Hours Access Level Required: ADMIN Displays the total accumulated run time of the chiller. 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. Hot Gas Control (Enabled/Disabled) Access level required: SERVICE Enables and disables the optional Hot gas Bypass Control feature. Refrigerant Level Control (Enabled / Disabled) Access Level Required: SERVICE Enables and Disables the Refrigerant Level Control Feature. OptiSave VSD Feature (Enabled/Disabled) (Software versions C.MLM.01.09.xxx or C.OPT.01.09A.xxx and later) Access Level Required: ADMIN Available only if utilizing a Variable Speed Drive motor controller. Enables and Disables the OptiSave VSD feature. If the OptiSave feature is Disabled, the Opti- Save navigation key on the Motor/VSD Screen is not YORK INTERNATIONAL 23

displayed and the Total Savings will not be displayed on the Home screen. Edit Phone Numbers (If compressor application is other than P, applies only to software version C.MLM.01.05.xxx and later) 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 Int l 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 160.54-M1. NAVIGATION Home Causes an instant return to the Home Screen. Setup Return to the Setup Screen. 24 YORK INTERNATIONAL

MOTOR / VARIABLE SPEED DRIVE SCREEN YT & YK OPTISAVE OVERVIEW This screen displays information pertaining to a Variable Speed Drive (VSD). 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 f the Full Load Amps (FLA) value. Current Limit Setpoint Displays the current limit value in use. This value could come from a 0-20mA, 4-20mA, 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 Displays the time remaining in the programmed pulldown period if the value is non-zero. Output Voltage Displays the output voltage measured to the motor. "OptiSave" Navigation Key Output Current - Phase A, B, C Displays the phase current measured to the motor. Input Power Displays the total Kilowatts measured by the VSD or Harmonic Filter, if installed. kw Hours Displays the cumulative amount of kilowatts used over time as the VSD motor controller operates. Pre-Rotation Vane Position Displays the pre-rotation vane position as a value between 0 and 100%. Harmonic Filter Data (Harmonic Filter installed only) Supply kva Displays the supply kva measured by the filter. Total Power Factor Displays the relationship between the Input power and the Supply kva. Voltage Total Harmonic Distortion - L1, L2, L3 Displays the Total Harmonic Distortion (THD) for each of the voltage lines as calculated by the filter. Output Frequency Displays the present output frequency to the motor. YORK INTERNATIONAL 25

Supply Current Total Demand Distortion - L1, L2, L3 Displays the Total Dynamic Distortion (TDD) for each of the supply current lines as calculated by the filter. 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 pre-rotation vanes will not be permitted to open further. If the motor current rises above this value, the pre-rotation vanes will close 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. KWH Reset (Software versions: YT - C.MLM.02.04.xxx and C.OPT.02.04A.xxx or YK - C.MLM.01.08.xxx or C.OPT.01.08A.xxx and earlier, or versions: YT - C.MLM.02.05.xxx and C.OPT.02.05A.xxx or YK - C.MLM.01.09.xxx or C.OPT.01.09A.xxx and later with OptiSave feature Disabled) Access Level Required: SERVICE Allows the user to reset the cumulative kilowatt Hours. (Software versions: YT - C.MLM.02.05.xxx and C.OPT.02.05A.xxx, or YK - C.MLM.01.09.xxx and C.OPT.01.09A.xxx and later with OptiSave feature Enabled) The KWH Reset will not be displayed. Reset function is via the OptiSave screen VSD KWh Reset key. Service Technicians refer to YORK Service Manual 160.55-M1 and 160.54-M1. Filter Inhibit (Harmonic Filter installed only) Access Level Required: SERVICE Disable the filter logic from activating, although the system will still communicate with the device. Only available when chiller is stopped. NAVIGATION Home Causes an instant return to the Home Screen. VSD Details Moves to the subscreen which provides more information about the Variable Speed Drive. ACC Details Access Level Required: SERVICE Moves to the subscreen which provides more information about the Adaptive Capacity Control. Filter Details (Harmonic Filter installed only) Moves to the subscreen which provides more information about the Harmonic Filter. OptiSave (Software versions: YT - C.MLM.02.05.xxx and C.OPT.02.05A.xxx, or YK - C.MLM.01.09.xxx and C.OPT.01.09A.xxx and later with OptiSave feature Enabled) Available only if utilizing a Variable Speed Drive motor controller and the OptiSave feature is enabled. Moves to the subscreen that provides detailed view of the OptiSave Energy Analyzer parameters and provides for the programming of OptiSave Energy Analyzer setpoints. The OptiSave Energy Analyzer Graph and Data screens as well as OptiSave print reports are accessed under this screen. 26 YORK INTERNATIONAL

OPTISAVE ENERGY ANALYZER SCREEN YT & YK Software versions: YT - C.MLM.02.05.xxx and C.OPT.02.05A.xxx, or YK - C.MLM.01.09.xxx and C.OPT.01.09A.xxx and later. OVERVIEW This screen displays information pertaining to the OptiSave Energy Analyzer VSD feature. The Opti- Save Energy Analyzer feature determines the amount of energy saved in applying a Variable Speed Drive versus a Constant Speed Drive on a centrifugal chiller. DISPLAY ONLY Condenser Liquid Temperature - Return Displays the temperature of the liquid as it enters the condenser. Input Power Displays the total Kilowatts (kw) measured by the VSD or Harmonic Filter, if installed. Constant Speed Meter Displays the cumulative amount of calculated kilowatts over time (kwh), that would have been used by a Constant Speed motor controller. Variable Speed Meter Displays the cumulative amount of kilowatts used over time (kwh) as the VSD motor controller operates. Last Full Calendar Month Minimum Return Condenser Liquid Temperature Displays the value of the Monthly Minimum Return Condenser Liquid Temperature for the month prior to the present month. Last Full Calendar Month Savings Displays the amount of the monthly saved energy (kwh) for the prior month. Total Energy Savings Displays the cumulative calculated amount of kwh saved in using a Variable Speed Drive vs. a Constant Speed Drive. Based on an energy cost of Per kwh, Displays the Price Per kwh setpoint value used to compute the Total Savings in USD. the total savings would be USD. Displays the calculated amount in USD of the Total Energy Savings (kwh) multiplied by the Price Per kwh. YORK INTERNATIONAL 27

PROGRAMMABLE Price Per kwh Access Level Required: Service Allows user to specify the Price Per kwh value in USD (0.00) used to compute the Total Savings in USD. If the Price Per kwh is zero (0), the total USD savings will not be calculated or displayed. Home Screen Display Access Level Required: Service Allows user to select the Total Savings mode displayed on the Home Screen as either the Total Energy Saved (kwh) or the Total Savings (USD). If the Price Per kwh is zero, the Total Energy Saved (kwh) is displayed, regardless of the mode selected, and the Total Savings in USD will not be calculated. CSD Design kw Access Level Required: ADMIN Allows user to specify the VSD Design kw. If the CSD Design kw is 0 kw, the OptiSave feature will not function. VSD Design kw Access Level Required: ADMIN Allows user to specify the VSD Design kw. If the VSD Design kw is 0 kw, the OptiSave feature will not function. Print Access Level Required: Operator Keypress generates a hard-copy report that provides a snapshot of the OptiSave Energy Analyzer data at the time the key is pressed. The OptiSave Energy Analyzer report is a manual print report that is not available for Data Logging setup as an automatic printing report. NAVIGATION Home Causes an instant return to the Home Screen. Motor A detailed view of the motor controller parameters, specific to the controller type presently utilized on the chiller system. This allows programming of the Current Limit and the Pulldown Demand Limit values. For a VSD system, the Adaptive Capacity Control and Harmonic Filter information is controlled under this screen. Graph (OptiSave) Moves to the subscreen that provides a bar graph display of the VSD Monthly Total Energy Used verus the CSD Monthly Total Energy Used for the past 12 months. Data (OptiSave) Access Level Required: ADMIN Moves to the subscreen that displays and allows for the modification of the VSD kwh Meter, the CSD kwh Meter, the Total Energy Savings, and the Monthly Total Saved Energy (x12 months) values. 428 YORK INTERNATIONAL

OPTISAVE ENERGY ANALYZER GRAPH SCREEN YT & YK Software versions: YT - C.MLM.02.05.xxx and C.OPT.02.05A.xxx, or YK - C.MLM.01.09.xxx and C.OPT.01.09A.xxx and later OVERVIEW This OptiSave Energy Analyzer subscreen displays a bar graph representation of the VSD (kwh) Monthly Total Energy Used verus the CSD (kwh) Monthly Total Energy Used for the past 12 months. The X-Axis labels are the past 12 operating months. The Y-Axis kwh labels are automatically scaled to the highest of the monthly values. DISPLAY ONLY Constant Speed Meter Displays a bar graph representation of the calculated value of kwh that would be consumed if using a Constant Speed Drive, for the past 12 months. Variable Speed Meter Displays a bar graph representation of the actual value of kwh being consumed by the Variable Speed Drive, for the past 12 months. NAVIGATION Home Causes an instant return to the Home Screen. OptiSave Returns to the OptiSave screen which provides detailed data pertaining to the OptiSave Energy Analyzer VSD feature. YORK INTERNATIONAL 529

OPTISAVE ENERGY ANALYZER DATA SCREEN YT & YK Software versions: YT - C.MLM.02.05.xxx and C.OPT.02.05A.xxx, or YK - C.MLM.01.09.xxx and C.OPT.01.09A.xxx and later OVERVIEW Access Level Required: ADMIN This OptiSave Energy Analyzer subscreen displays and provides access to modify the VSD kwh Meter, the CSD kwh Meter, the Total Energy Savings, and the Monthly Total Saved Energy (x12 months) values used by the OptiSave energy Analyzer software feature. DISPLAY ONLY Constant Speed Meter Displays the cumulative amount of calculated kilowatts over time (kwh), that would have been used by a Constant Speed motor controller. Variable Speed Meter Displays the cumulative amount of kilowatts used over time (kwh) as the VSD motor controller operates. Total Energy Savings Displays the cumulative calculated amount of kwh saved in using a Variable Speed Drive vs. a Constant Speed Drive. PROGRAMMABLE Print Access Level Required: ADMIN Keypress generates a hard-copy report of the Opti- Save Energy Analyzer Setpoint data at the time the key is pressed. This report prints the following setpoint data: Report Title Chiller ID Copyright message Time/Date Software Version CSD Design kw VSD Design kw Price Per kwh Home Screen Display Mode (Energy/USD) CSD kwh Meter VSD kwh Meter Total Saved Energy 12 Monthly Total Energy Savings Meters 430 YORK INTERNATIONAL