York YT manuale d’uso

OPERA TING & MAINTENANCE MILLENNIUM ® CENTRIFUGAL LIQUID CHILLERS Supersedes: 160.55-O1 (402) Form 160.55-O1 (604) MODEL YT (STYLE J) R123 COOLING ONL Y WITH OPTIVIEW ™ CONTROL CENTER FOR ELECTRO-MECHANICAL ST ARTER, SOLID ST A TE ST ARTER & V ARIABLE SPEED DRIVE 29509A[...]

YORK INTERNA TIONAL 2 FORM 160.55-O1 (604)[...]

FORM 160.55-O1 (604) 3 YORK INTERNA TIONAL This equipment is a relatively complicated apparatus. During installation, operation, maintenance or service, in di vid u als may be exposed to certain components or conditions including, but not limited to: refrigerants, oils, materials under pressure, rotating components and both high and low voltage. Ea[...]

YORK INTERNA TIONAL 4 FORM 160.55-O1 (604) CHANGEABILITY OF THIS DOCUMENT In complying with YORK’s policy for continuous prod uct improvement, the information contained in this doc u ment is subject to change without notice. While YORK makes no commitment to update or pro vide current in for ma tion automatically to the manual own er, that in for[...]

FORM 160.55-O1 (604) 5 YORK INTERNA TIONAL SECTION 1 Description of System and Fundamentals of Operation............................... 7 SECTION 2 OptiV iew Control Center ............................................................................. 9 SECTION 3 Printers ..............................................................................[...]

YORK INTERNA TIONAL 6 FORM 160.55-O1 (604) LIST OF FIGURES FIG. 1 – MODEL YT MILLENNIUM CHILLER .................... 7 FIG. 2 – REFRIGERANT FLOW -THROUGH CHILLER ..... 8 DET AIL A – COMPRESSOR PREROT A TION V ANES .................................................................. 8 FIG. 3 – CONTROL CENTER ...................................[...]

FORM 160.55-O1 (604) 7 YORK INTERNA TIONAL combination Logic/T rigger Board that interfaces the Con trol Center with a serial communications link. Ear- li er vintage chillers, such as those encountered in Con trol Cen ter retro Þ t ap pli ca tions are equipped with the Mod “A” starter . This Start er con tains a T rig ger Board that in ter fac[...]

YORK INTERNA TIONAL 8 FORM 160.55-O1 (604) FIG. 2 – REFRIGERANT FLOW -THRU CHILL ER PREROT A TION V ANES (See Detail A) SUCTION COOLER ELIMINA TOR OIL COOLER LD00924 FLOW CON- TROL SUB-COOL- CON- DISCHARGE BAFFLE DISCHARGE COMPRESSOR able ori Þ ce meters the ß ow of liquid re frig er ant to the cooler to com plete the refrigerant cir cuit. The [...]

FORM 160.55-O1 (604) 9 YORK INTERNA TIONAL SECTION 2 OPTIVIEW CONTROL CEN TER INTRODUCTION The YORK OptiV iew Control Center is a mi cro pro - ces sor based control system for R-1 1 or R123 cen trif u gal chillers. It controls the leaving chilled liq uid tem per a ture via pre-rotation vane controls and has the abil i ty to limit motor current via [...]

YORK INTERNA TIONAL 10 FORM 160.55-O1 (604) version is C.OPT .02.xx.yzz, and is viewable on the DIAGNOSTICS Screen in SER VICE access level. The program can be upgraded by download- ing a new program from a Program Card. Program Cards are shirt-pocket-size portable memory stor- age devices available from YORK. Earlier vintage chillers could be equi[...]

FORM 160.55-O1 (604) 11 YORK INTERNA TIONAL THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T[...]

YORK INTERNA TIONAL 12 FORM 160.55-O1 (604) When in this position, the chiller will not run un der any condition. For safe ty reasons, this po si tion is re quired for many maintenance tasks to be com plet ed (such as prox im i ty probe and vane cal i bra tion). In ad di tion, the switch must be placed in this state fol low ing a Safety shut down b[...]

FORM 160.55-O1 (604) 13 YORK INTERNA TIONAL OVERVIEW The new graphical display on each control pan el al lows a wide variety of information to be pre sent ed to the user . Each screen description in this document will be gin with a section entitled Overview which will de scribe the graphical elements on the screen and give a short summary of the fu[...]

YORK INTERNA TIONAL 14 FORM 160.55-O1 (604) Lead ing zeroes are not necessary . If a dec i mal point is nec es sary , press the ‘•’ key (i.e. 45.0). Pressing the ▲ key , sets the entry value to the de fault for that setpoint. Pressing the ▼ key , clears the pres- ent entry . The ◄ key is a backspace key and causes the entry point to mov[...]

FORM 160.55-O1 (604) 15 YORK INTERNA TIONAL ANALOG INPUT RANGES The following table indicates the valid display range for each of the analog input values. In the event that the input sensor is reading a value outside of these ranges, the < or > symbols will be displayed beside the min i mum or maxi- mum value, respectively . *Saturation tempe[...]

YORK INTERNA TIONAL 16 FORM 160.55-O1 (604) HOME SCREEN OVERVIEW When the chiller system is powered on, the above de- fault display appears. The primary values which must be monitored and controlled are shown on this screen. The Home Screen display depicts a visual rep re sen ta tion of the chiller itself. Animation indicates chilled liq uid ß ow [...]

FORM 160.55-O1 (604) 17 YORK INTERNA TIONAL Only qual i Þ ed service personnel utilize this access lev el. This lev el provides advanced control over many of the chiller func tions and allows cal i bra tion of many of the chiller con trols. The access lev els are listed above in hierarchical order be gin ning with the lowest level and proceeding t[...]

YORK INTERNA TIONAL 18 FORM 160.55-O1 (604) SYSTEM SCREEN OVERVIEW This screen gives a general overview of common chill er parameters for both shells. DISPLA Y ONL Y Discharge T emperatur e Displays the temperature of the refrigerant in its gas- eous state at discharge of the compressor as it travels to the condenser . Chilled Liquid T emperature -[...]

FORM 160.55-O1 (604) 19 YORK INTERNA TIONAL Current Limit Displays the current limit value in use. This value could come from a 0-20mA or 4-20mA, 0-10VDC or 2-10VDC input in An a log Remote mode, PWM signal in Digital Remote mode, MicroGateway interface in ISN mode or a locally pro grammed value. PROGRAMMABLE None NA VIGA TION Home Access Level Re [...]

YORK INTERNA TIONAL 20 FORM 160.55-O1 (604) EV APORA TOR SCREEN OVERVIEW This screen displays a cutaway view of the chiller evap- o ra tor . All setpoints relating to the evaporator side of the chiller are maintained on this screen. Animation of the evaporation process indicates whether the chill er is presently in a RUN condition. Animation of the[...]

FORM 160.55-O1 (604) 21 YORK INTERNA TIONAL PROGRAMMABLE Local Leaving Chilled Liquid T em per a ture - Range Access Level Re quir ed: OP ER A TOR This is the range over which an analog (0-20mA or 4- 20mA, 0-10VDC or 2-10VDC) in Analog Remote Mode or a digital signal (PWM) in Digital remote mode can reset the Leaving Chilled Liquid Temperature setp[...]

YORK INTERNA TIONAL 22 FORM 160.55-O1 (604) CONDENSER SCREEN OVERVIEW This screen displays a cutaway view of the chiller con dens er . All setpoints relating to the condenser side of the chiller are maintained on this screen. Animation indicates condenser liquid ß ow . This screen also serves as a gateway to controlling the Refrigerant Level. DISP[...]

FORM 160.55-O1 (604) 23 YORK INTERNA TIONAL Refrigerant Level Setpoint Displays the setpoint to which the refrigerant level is being con trolled. Ramp Up T ime Remaining Displays the time remaining in the period in which the Re frig er ant Level Setpoint is being ramped to the Re frig er ant Level T arget Setpoint. This only dis played if the Re fr[...]

YORK INTERNA TIONAL 24 FORM 160.55-O1 (604) PURGE SCREEN 00351VIP FIG. 8 OVERVIEW This screen displays a cutaway view of the Purge T ank. LED’ s depict the state of the Float switches, Oil V alve solenoid and Air V alve solenoid and the pur ge exhaust count is displayed. All setpoints relating to the purge sys tem are maintained on this screen. T[...]

FORM 160.55-O1 (604) 25 YORK INTERNA TIONAL to 60. During this period, purge exhausts are counted and the Exhaust Count displayed is that which has oc- curred in the last number of minutes displayed in the Exhaust W indow . After the Exhaust W indow reaches 60, the purge exhausts that occurred in the oldest min- ute are discarded from the Exhaust C[...]

YORK INTERNA TIONAL 26 FORM 160.55-O1 (604) REFRIGERANT LEVEL CONTROL SCREEN FIG. 9 00303VIP OVERVIEW This screen displays a cutaway view of the chiller con- dens er , along with the liquid refrigerant level sensor and the ß ow control valve. All setpoints relating to the liq uid level control are maintained on this screen. Through animation, the [...]

FORM 160.55-O1 (604) 27 YORK INTERNA TIONAL [Refrigerant Level Control] Pr oportional Limit Close Service T echnicians refer to YORK Service Manual 160.55-M1. [Refrigerant Level Control] Rate Limit Open Service T echnicians refer to YORK Service Manual 160.55-M1. [Refrigerant Level Control] Rate Limit Close Service T echnicians refer to YORK Servic[...]

YORK INTERNA TIONAL 28 FORM 160.55-O1 (604) COMPRESSOR SCREEN OVERVIEW This screen displays a cutaway view of the chiller com- pres sor , revealing the impeller and shows all con di tions as so ci at ed with the compressor . In addition, with the proper Access Level, the pre-rotation vanes may be manually controlled. Animation of the com pres sor i[...]

FORM 160.55-O1 (604) 29 YORK INTERNA TIONAL Full Load Amps Access Level Re quir ed: SER VICE Displays the motor current as a percentage of the Full Load Amps (FLA) value. Phase A, B, C Current (Solid State Starter only) Access Level Requir ed: SER VICE Displays the 3-phase motor current values being read from the Solid State Starter . PROGRAMMABLE [...]

YORK INTERNA TIONAL 30 FORM 160.55-O1 (604) OVERVIEW This screen displays a cutaway view of the Hot Gas By pass Valve. All setpoints relating to Hot Gas Bypass con trol are maintained on this screen. Also, related Hot Gas Bypass control parameters are displayed for ref er ence. Through animation, the relative valve position is dis played. In ad- di[...]

FORM 160.55-O1 (604) 31 YORK INTERNA TIONAL in response to surge events detected by the compres- sor V ariable Speed Drive Adaptive Capacity Control Board. Hot Gas Bypass Control Mode Indicates whether the Hot Gas Bypass is under au to mat ic, manual or override control. “Override” is dis played dur- ing Minimum Load over ride conditions or whe[...]

YORK INTERNA TIONAL 32 FORM 160.55-O1 (604) OVERVIEW (This feature applies to Flash Memory Card ver sion C.MLM.02.02.xxx and later) This screen displays a cutaway view of the chiller com pres sor and all parameters relating to the Surge Pro tec tion feature. All setpoints relating to this fea ture are maintained on this screen. DISPLA Y ONL Y Delta[...]

FORM 160.55-O1 (604) 33 YORK INTERNA TIONAL PROGRAMMABLE Shutdown (Enabled/Disabled) Access Level Requir ed: OPERA TOR Allows the user to select whether the chiller will shut- down or continue to run when an Excess Surge sit u a tion has been detected. If this setpoint is Enabled and the EXTENDED RUN setpoint is Disabled, a safety shutdown is per f[...]

YORK INTERNA TIONAL 34 FORM 160.55-O1 (604) if the SURGE WINDOW COUNT is less than or equal to the COUNT LIMIT , this message and load inhibit are au to mat i cal ly cleared. Al ter nat ing with this message is “W arning – Excess Surge De tect ed” that continues after the 10 minute pe ri od has elapsed until man u al ly cleared with the W arn[...]

FORM 160.55-O1 (604) 35 YORK INTERNA TIONAL THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T 2[...]

YORK INTERNA TIONAL 36 FORM 160.55-O1 (604) PRE-ROT A TION V ANES CALIBRA TION SCREEN OVERVIEW This screen displays a cutaway view of the chiller com- pres sor , revealing the pre-rotation vanes and pro vides the capability of calibrating the pre-rotation vanes for either V ariable Speed Drive or Hot Gas By pass ap pli - ca tions. Requires a login [...]

FORM 160.55-O1 (604) 37 YORK INTERNA TIONAL THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T 2[...]

YORK INTERNA TIONAL 38 FORM 160.55-O1 (604) VSD TUNING SCREEN OVERVIEW This screen displays a cutaway view of the chiller com- pres sor , revealing the pre-rotation vanes and pro vides the capability of manually controlling the pre-rotation vanes. Animation of the pre-rotation vanes indicates the pre-rotation vane position. In addition, this screen[...]

FORM 160.55-O1 (604) 39 YORK INTERNA TIONAL Output Current – Phase A, B, C (Flash Memory Card version C.MLM.02.02.xxx and later) Displays the phase current measured to the motor . PROGRAMMABLE Set Allows manual programming of the command fre quen cy value. Manually programming this value will put the VSD frequency control into manual mode. Auto F[...]

YORK INTERNA TIONAL 40 FORM 160.55-O1 (604) OIL SUMP SCREEN OVERVIEW This screen displays a close-up of the chiller oil sump. DISPLA Y ONL Y Oil Sump T emperature Displays the temperature of the oil in the sump. Oil Pressur e Displays the pressure differential between the high side oil pressure transducer (output of oil Þ lter) and the low side oi[...]

FORM 160.55-O1 (604) 41 YORK INTERNA TIONAL ELECTRO-MECHANICAL ST ARTER SCREEN OVERVIEW This screen displays all information pertaining to an Electro-Mechanical Starter . DISPLA Y ONL Y Motor Run (LED) Indicates whether the digital output from the controls is commanding the motor to RUN . Motor Curr ent % Full Load Amps Displays the motor current a[...]

YORK INTERNA TIONAL 42 FORM 160.55-O1 (604) MOD “A” SOLID ST A TE ST ARTER SCREEN OVERVIEW This screen displays all information pertaining to the Mod “A” Solid State Starter . DISPLA Y ONL Y Motor Run (LED) Indicates whether the digital output from the controls is commanding the motor to RUN. Motor Curr ent % Full Load Amps Displays the mot[...]

FORM 160.55-O1 (604) 43 YORK INTERNA TIONAL 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 Requir ed : SER VICE De Þ ne the maximum amps at which the motor can op- er ate. This value is viewable when logged in under the Operator or V iew access lev[...]

YORK INTERNA TIONAL 44 FORM 160.55-O1 (604) MOD “B” SOLID ST A TE ST ARTER SCREEN 00359VIP FIG. 18 OVERVIEW This screen displays all information pertaining to the Mod “B” Solid State Starter . DISPLA Y ONL Y Motor Run (LED) Indicates whether the digital output from the controls is commanding the motor to RUN. Motor Curr ent % Full Load Amps[...]

FORM 160.55-O1 (604) 45 YORK INTERNA TIONAL Pulldown Demand Limit Access Level Requir ed: OPERA TOR Allows the user to specify the current limit val ue (as a per cent age of FLA) to which the chill er will be limited dur ing the speci Þ ed pulldown time. This value will over ride the Motor Cur rent Limit value dur ing this time pe ri od. This func[...]

YORK INTERNA TIONAL 46 FORM 160.55-O1 (604) V ARIABLE SPEED DRIVE SCREEN OVERVIEW This screen displays information per tain ing to a V ari able Speed Drive (VSD). DISPLA Y ONL Y Motor Run (LED) Indicates whether the digital output from the controls is commanding the motor to RUN. Motor Curr ent % Full Load Amps Displays the motor current as a per c[...]

FORM 160.55-O1 (604) 47 YORK INTERNA TIONAL Supply Current T otal Demand Distortion - L1, L2, L3 Displays the T otal Dynamic Distortion (TDD) for each of the supply current lines as calculated by the Þ lter . PROGRAMMABLE Local Motor Curr ent Limit Access Level Requir ed: OP ER A T OR Allows the user to specify the maximum al lowed mo- tor current[...]

YORK INTERNA TIONAL 48 FORM 160.55-O1 (604) V ARIABLE SPEED DRIVE DET AILS SCREEN (STYLE D VSD AND VSD WITH P ART NUMBER 371-03789-XXX (503 HP 60 HZ; 410 HP 50 HZ) OVERVIEW This screen displays more detailed information pertain- ing to a V ariable Speed Drive (VSD). Flash Memory Card version C.MLM.02.04.xxx (and later) is required for VSD part numb[...]

FORM 160.55-O1 (604) 49 YORK INTERNA TIONAL Internal Ambient T emperature Displays the ambient temperature inside the VSD cab- i net as reported by the VSD. Converter Heatsink T emperature Displays the heatsink temperature of the con vert er as reported by the VSD. Baseplate T emperature - Phase A, B, C (“Labeled “Heatsink T emperatures on VSD [...]

YORK INTERNA TIONAL 50 FORM 160.55-O1 (604) V ARIABLE SPEED DRIVE DET AILS SCREEN (APPLICABLE TO VSD WITH PART NUMBER 371-02767-XXX (60 HZ) OR 371-03700-XXX (50 HZ)) OVERVIEW This screen displays more detailed information per- tain ing to a V ariable Speed Drive (VSD). Service T ech ni cians refer to YORK Service Manual 160.55- M1 for op er a tion [...]

FORM 160.55-O1 (604) 51 YORK INTERNA TIONAL Internal Ambient T emperature Displays the ambient temperature inside the VSD cab- i net as reported by the VSD. Converter Heatsink T emperature Displays the heatsink temperature of the con vert er as reported by the VSD. Baseplate T emperatur e Displays the Baseplate temperature of the 3-phase volt- age [...]

YORK INTERNA TIONAL 52 FORM 160.55-O1 (604) ADAPTIVE CAP ACITY CONTROL DET AILS SCREEN OVERVIEW This screen displays more detailed in for ma tion per- tain ing to a Adaptive Capacity Control (ACC). Requires a login access level of SER- VICE. Service T echnicians refer to YORK Service Manual 160.55-M1 for operation instructions and ex pla - na tion [...]

FORM 160.55-O1 (604) 53 YORK INTERNA TIONAL Pulldown Demand Limit Allows the user to specify the current limit val ue (as a percentage of FLA) to which the chiller will be limited during the speci Þ ed pulldown limit time. This value will override the Motor Current Limit value during this time period. This function is used to provide ener gy sav i[...]

YORK INTERNA TIONAL 54 FORM 160.55-O1 (604) HARMONIC FIL TER DET AILS SCREEN (STYLE D VSD AND VSD WITH P ART NUMBER 371-03789-XXX (503 HP 60 HZ; 410 HP 50 HZ OVERVIEW This screen displays more detailed in for ma tion per- tain ing to the IEEE-519 Harmonic Filter . Flash Memory Card version C.MLM.02.04.xxx (and later) is required for VSD part number[...]

FORM 160.55-O1 (604) 55 YORK INTERNA TIONAL Heatsink T emperatur e (Labeled “Baseplate T emperatures” on VSD with part number 371-03789-xxx {503HP 60Hz; 419HP 50Hz}). Displays the temperature of the Harmonic Fil ter Heat- sink. V oltage Peak (N-L1, N-L2, N-L3) Displays the 3-phase peak voltages as mea sured by the Harmonic Filter (Neutral to Li[...]

YORK INTERNA TIONAL 56 FORM 160.55-O1 (604) HARMONIC FIL TER DET AILS SCREEN (VSD WITH P ART NUMBER 371-02767-XXX (60 HZ) OR 371-03700-XXX (50 HZ)) OVERVIEW This screen displays more detailed in for ma tion per- tain ing to the IEEE-519 Harmonic Filter . DISPLA Y ONL Y Motor Run (LED) Indicates whether the digital output from the controls is comman[...]

FORM 160.55-O1 (604) 57 YORK INTERNA TIONAL V oltage Peak ( N-L1, N-L2, N-L3 ) Displays the 3-phase peak voltages as mea sured by the Harmonic Filter (Neutral to Line). RMS V oltage ( L1-L2, L2-L3, L3-L1 ) Displays the 3-phase RMS V oltages across each line. V oltage T otal Harmonic Distortion ( L1, L2, L3 ) Displays the 3-phase voltage T otal Harm[...]

YORK INTERNA TIONAL 58 FORM 160.55-O1 (604) SETPOINTS SCREEN OVERVIEW This screen provides a convenient location for pro gram - ming the most common setpoints involved in the chiller control. This screen also serves as a gate way to a subscreen for de Þ ning the setup of general system parameters. DISPLA Y ONL Y Leaving Chilled Liquid T emperature[...]

FORM 160.55-O1 (604) 59 YORK INTERNA TIONAL Local Leaving Chilled Liquid T em per a ture - Setpoint Access Level Requir ed : OPERA TOR This value allows the user to de Þ ne the Leav ing Chilled Liquid Temperature that is to be maintained by the chill er. It is programmable over the range of 38.0°F to 70.0°F (water) or 10.0°F to 70.0°F (brine).[...]

YORK INTERNA TIONAL 60 FORM 160.55-O1 (604) SETUP SCREEN OVERVIEW This screen is the top level of the general con Þ g u ra tion pa ram e ters. It allows programming of the time and date, along with speci Þ cations as to how the time will be dis played (12 or 24 hour format). In addition, the chill er con Þ g u ra tion, as determined by the state[...]

FORM 160.55-O1 (604) 61 YORK INTERNA TIONAL PROGRAMMABLE Set Date Access Level Re quir ed : OP ER A T OR Allows the user to specify the present date. This value is criti- cal to logging system shutdowns accurately and for uti liz ing the scheduling ca pa bil i ties. When prompt ed to en ter a date value, the user must enter the day, month and four-[...]

YORK INTERNA TIONAL 62 FORM 160.55-O1 (604) Schedule Access Level Requir ed : VIEW Moves to the subscreen allowing de Þ nition of the chill er operation schedule. Diagnostics Access Level Requir ed : SER VICE Moves to the subscreen allowing limited di ag nos tic ca pa bil i ty while operating. Refer to YORK Service Man u al 160.55-M1 Comms Access [...]

FORM 160.55-O1 (604) 63 YORK INTERNA TIONAL THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T 2[...]

YORK INTERNA TIONAL 64 FORM 160.55-O1 (604) SCHEDULE SCREEN OVERVIEW The schedule screen contains more pro gram ma ble val ues than a normal display screen. As such, each pro gram - ma ble value is not linked to a speci Þ c but ton. In stead the Select key is used to enable the cur sor ar rows which are used to highlight the day and the start or s[...]

FORM 160.55-O1 (604) 65 YORK INTERNA TIONAL tion which enforces the scheduled starting and stop ping of the chiller . Repeat Sunday Schedule Access Level Re quir ed : OP ER A T OR Duplicates the schedule de Þ ned for Sunday for the re main der of the standard weekdays. Reset All Exception Days Access Level Requir ed: OPERA TOR Deletes all programm[...]

YORK INTERNA TIONAL 66 FORM 160.55-O1 (604) USER SCREEN OVERVIEW This screen allows de Þ nition of custom User ID’ s and matching passwords. This allows the building ad min - is tra tor to assign custom passwords to those who are authorized to maintain the chiller . Each Custom User value is not linked to a speci Þ c but ton. Instead, the Chang[...]

FORM 160.55-O1 (604) 67 YORK INTERNA TIONAL 2 THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T[...]

YORK INTERNA TIONAL 68 FORM 160.55-O1 (604) COMMS SCREEN OVERVIEW (Screen shown fr om Flash Memory Card version C.MLM.02.02.xxx and later . Scr een layout fr om earlier versions slightly differ ent) This screen allows de Þ nition of the nec es sary com- mu ni ca tions parameters. Refer to PRINTER Sec tion of this book for details of the Printer co[...]

FORM 160.55-O1 (604) 69 YORK INTERNA TIONAL 2 COM 2 Stop Bit(s) De Þ ne the number of stop bits at which the panel shall com mu ni cate through the modem port. NA VIGA TION Home Access Level Re quir ed : VIEW Causes an instant return to the Home Screen. Setup Access Level Re quir ed : VIEW Return to the Setup Screen.[...]

YORK INTERNA TIONAL 70 FORM 160.55-O1 (604) PRINTER SCREEN OVERVIEW This screen allows de Þ nition of the necessary com mu - ni ca tions parameters for the printer . Refer to PRINT ER section of this book for details of the Printer con nec tions and setup. DISPLA Y ONL Y Time Remaining Until Next Print Displays the time until the next print log wi[...]

FORM 160.55-O1 (604) 71 YORK INTERNA TIONAL NA VIGA TION Home Access Level Re quir ed : VIEW Causes an instant return to the Home Screen. Setup Access Level Re quir ed : VIEW Return to the Setup Screen. 2[...]

YORK INTERNA TIONAL 72 FORM 160.55-O1 (604) SALES ORDER SCREEN OVERVIEW This screen allows de Þ nition of the sales order pa ram e ters. The Commissioning date is entered by the YORK Service Technician at the time of chiller com mis sion ing. These values should never be changed or en tered by any one other than a quali Þ ed Service Tech ni cian.[...]

FORM 160.55-O1 (604) 73 YORK INTERNA TIONAL THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T 2[...]

YORK INTERNA TIONAL 74 FORM 160.55-O1 (604) OPERA TIONS SCREEN OVERVIEW This screen allows de Þ nition of general pa ram e ters hav- ing to do with the operation of the chiller . DISPLA Y ONL Y Chiller Run Time (Flash memory Card version C.MLM.0 2.01 or later) Displays the amount of time the chiller has been run ning since the last start signal wa[...]

FORM 160.55-O1 (604) 75 YORK INTERNA TIONAL 2 NA VIGA TION Home Access Level Re quir ed : VIEW Causes an instant return to the Home Screen. Setup Access Level Re quir ed : VIEW Return to the Setup Screen.[...]

YORK INTERNA TIONAL 76 FORM 160.55-O1 (604) HIST OR Y SCREEN 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 shut down, move to the subscreen HISTOR Y DET AILS. The user may use the Select Fault button to select the history to view . At[...]

FORM 160.55-O1 (604) 77 YORK INTERNA TIONAL 2 T rending Access Level Re quir ed : VIEW Causes a move to a subscreen allowing the user to view trending data on selected chiller parameters. Custom V iew (Flash memory Card version C.MLM.0 2.01 or later) Access Level r equired: VIEW Causes a move to a sub-screen allowing the user to view the Custom Set[...]

YORK INTERNA TIONAL 78 FORM 160.55-O1 (604) FIG. 34 HIST OR Y DET AILS 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. Number of screens required to display all of the data varies ac- cord ing to type of motor starter and opt[...]

FORM 160.55-O1 (604) 79 YORK INTERNA TIONAL 2 SECURITY LOG SCREEN OVERVIEW (This screen only available with Flash Memory Card version C.MLM.02.03.xxx and later) This screen displays a listing of the last 75 setpoint chang es. They are listed and numbered in reverse or der in which they were changed, with the most recent listed as number 1. Multiple[...]

YORK INTERNA TIONAL 80 FORM 160.55-O1 (604) SECURITY LOG DET AILS SCREEN OVERVIEW (This screen only available with Flash Memory Card version C.MLM.02.03.xxx and later) 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 an[...]

FORM 160.55-O1 (604) 81 YORK INTERNA TIONAL Security Log Access Level Requir ed : SER VICE Causes an instant return to the Security Log Screen. V iew Details Access Level Requir ed : SER VICE Causes a move to a sub-screen containing the details of the setpoint change selected with the Log Entry key . 2[...]

YORK INTERNA TIONAL 82 FORM 160.55-O1 (604) TREND SCREEN 00480VIP FIG. 37 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 dis played in a time of day or elapsed time format, as se lect ed with the X-axis toggle key. The Y-Ax[...]

FORM 160.55-O1 (604) 83 YORK INTERNA TIONAL DISPLA Y ONL Y This screen allows the user to view the graphical trend- ing of the selected pa ram e ters and is also a gateway to the graph setup screens. A red screen with the words “TREND MAX MUST BE > TREND MIN” will ap pear if the Y -Axis min i mum has been programmed to a value that is greate[...]

YORK INTERNA TIONAL 84 FORM 160.55-O1 (604) TREND SETUP SCREEN OVERVIEW This screen is used to con Þ gure 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 ente[...]

FORM 160.55-O1 (604) 85 YORK INTERNA TIONAL Select Access Level Requir ed: OPERA TOR This key is used to enter the slot numbers and the min- i mum and maximum Y -Axis values of each parameter to be trended. Pressing this key places a yellow box around Data Point 1 Slot Number . Use the ▲ and ▼ navigation keys to place the box around the value o[...]

YORK INTERNA TIONAL 86 FORM 160.55-O1 (604) OVER VIEW (Flash Memory Card version C.MLM.02.02.xxx and later) The desired data collection start/stop triggers are set up on this screen. The trend data collection can be set to start or stop based upon the status of up to two selected T rig- gers. The Triggers can consist of dig i tal events or analog p[...]

FORM 160.55-O1 (604) 87 YORK INTERNA TIONAL PROGRAMMABLE Primary T rigger Access Level Requir ed: OPERA TOR Selects the Þ rst parameter to be evaluated. Selection is made from the Slot Numbers listing on the T rend Com- mon Slots Screen or the Master Slot Numbers List in this book. Setting this slot number to zero disables the Primary T rigger . P[...]

YORK INTERNA TIONAL 88 FORM 160.55-O1 (604) COMMON SLOTS SCREEN OVERVIEW This screen displays the slot numbers of the com- monly monitored parameters. The slot numbers for the re main der of the available parameters are listed on the Master Slot Numbers List that fol lows. From these lists, select up to six pa ram e ters to be trend ed. Return to t[...]

FORM 160.55-O1 (604) 89 YORK INTERNA TIONAL CUST OM VIEW SCREEN OVERVIEW (Flash memory Card version C.MLM.0 2.01 or later) This screen allows up to 10 Service T echnician se lect ed parameters to be displayed. These parameters are se- lect ed from a list on the Custom V iew Setup Screen. This allows the Service T echnician to display pa ram e ters [...]

YORK INTERNA TIONAL 90 FORM 160.55-O1 (604) CUST OM VIEW SETUP OVERVIEW (Flash memory Card version C.MLM.0 2.01 or later) This screen allows the Service technician to select up to 10 parameters for display on the Custom V iew Screen. Requires a login ac cess level of SER- VICE. Ser vice T echnicians refer to YORK Ser vice Manual 160.55-M1 for opera[...]

FORM 160.55-O1 (604) 91 YORK INTERNA TIONAL MASTER SLOT NUMBERS LIST FOR USE WITH TREND FEA TURE SLOT NO. DESCRIPTION 256 System: Chiller State 257 System: Coastdown T ime Remaining 258 System: Prelube T ime Remaining 259 System: Are Safety Shut down Contacts Closed 260 System: Are Cy cling Shutdown Contacts Closed 261 System: Are An tic i pa to ry[...]

YORK INTERNA TIONAL 92 FORM 160.55-O1 (604) SLOT NO. DESCRIPTION 2059 SubCooling: T emperature 2060 Drop Leg Refrigerant: Is Sensor Present 2061 Drop Leg Refrigerant: T emperature 2063 V ent Line Solenoid: Is Solenoid On 2304 Motor: Starter T ype 2305 Motor: Is Motor Starter On 2306 Motor: Current %FLA 2307 Motor: Is Motor Controller Switch Open 23[...]

FORM 160.55-O1 (604) 93 YORK INTERNA TIONAL SLOT NO. DESCRIPTION 2871 Filter: Heatsink T emperature 2872 Filter: L1 - L2 RMS V oltage 2873 Filter: L2 - L3 RMS V oltage 2874 Filter: L3 - L1 RMS V oltage 2875 Filter: L1 - N Peak V oltage 2876 Filter: L2 - N Peak V oltage 2877 Filter: L3 - N Peak V oltage 2878 Filter: L1 T otal Harmonic Distortion 287[...]

YORK INTERNA TIONAL 94 FORM 160.55-O1 (604) DISPLA Y MESSAGES The Status Bar of the Display contains a Status Line and, beneath it a Details Line. The Status Line con tains a message describing the operating state of the chiller; whether it is stopped, running, starting or shutting down. The Details Line displays W arning, Cycling, Safety , Start I[...]

FORM 160.55-O1 (604) 95 YORK INTERNA TIONAL “ MOTOR PULLDOWN LIMIT ” The Pulldown Demand Limit Setpoint timer is in ef fect and the Compressor Motor current is > the Pulldown Demand Current Limit Setpoint value. The Pre-rotation vane operation is being inhibited as de scribed in “ MO- TOR – HIGH CURRENT LIMIT” message above. ST ART INH[...]

YORK INTERNA TIONAL 96 FORM 160.55-O1 (604) ing. This message automatically clears and the V anes are permitted to open when the Evap o ra tor pres sure in creas es to the reset value. Warning Threshold (PSIA) Reset Thresh old (PSIA) Water Brine W a ter Brine R1 1 5.5 0.1 >Safety Setpoint 5.6 0.3>Safety Setpoint R123 4.5 0.1 >Safety Setpoi[...]

FORM 160.55-O1 (604) 97 YORK INTERNA TIONAL “ W ARNING – REFRIGERANT LEVEL OUT OF RANGE ” (Flash Memory Card version C.MLM.02.02C.xxx and earlier) The output of the Condenser Refrigerant Level Sensor is > 5.1VDC. This is indicative of a Level Sensor fail ure. While this condition exists, the Refrigerant V ari able Or- i Þ ce is driven to [...]

YORK INTERNA TIONAL 98 FORM 160.55-O1 (604) “ LEA VING CHILLED LIQUID – LOW TEMPERA TURE ” The Leaving Chilled Liquid T emperature has de creased to the programmed Shutdown T emperature Setpoint. The chiller will automatically restart when the tem per a ture increases to the programmed Restart T em per a ture Setpoint. “ LEA VING CHILLED LI[...]

FORM 160.55-O1 (604) 99 YORK INTERNA TIONAL “ ST AR TER – HIGH SUPPL Y LINE VOL T AGE ” (Mod “A” Solid State Starter”) The voltage in any phase of the AC Power Line V olt age supplying the Solid State Starter has increased to the high line voltage threshold for 20 continuous sec onds. The chiller will automatically restart when the volt[...]

YORK INTERNA TIONAL 100 FORM 160.55-O1 (604) ta neous ly; one via the serial communications link and one via the start re lay TB6-24 in the OptiV iew Control Cen ter . If they are not re ceived within 5 seconds of one another , a cycling shut down is performed and this mes sage is displayed. This is generally indicative of de fec tive wiring. “LC[...]

FORM 160.55-O1 (604) 101 YORK INTERNA TIONAL restart when the cycling condition clears. Ser vice and troubleshooting information is con tained in YORK Manual 160.00-M1. “ VSD SHUTDOWN – REQUESTING F AUL T DA T A ” The VSD has shut down the chiller and the OptiV iew Control Cen ter has not yet received the cause of the fault from the VSD, via [...]

YORK INTERNA TIONAL 102 FORM 160.55-O1 (604) Hz applications), the drive will initiate a system shut- down. A common cause for this shutdown is a severe sag in the incoming power to the drive. Monitor the in com ing three-phase AC line for severe sags and also monitor the DC link with a voltmeter . “ VSD – DC BUS V OL T AGE IMBALANCE ” The DC[...]

FORM 160.55-O1 (604) 103 YORK INTERNA TIONAL • Low Condenser Flow – The VSD sys tem re quires 8 feet of pressure drop across the heat ex chang er to maintain adequate GPM. If the pres sure drop is less than 8 feet, it will be nec es sary to correct the ß ow prob lem or add a boost er pump as is applied on ret ro Þ t chill ers. “ VSD – INV[...]

YORK INTERNA TIONAL 104 FORM 160.55-O1 (604) This is generally indicative of a wiring problem be tween the OptiV iew Control Center and the VSD. “ VSD – SERIAL COMMUNICA TIONS ” This message is generated when communications be- tween the Adaptive Capacity Control (ACC) Board and the VSD Logic Board or between the OptiV iew Con trol Center Mic[...]

FORM 160.55-O1 (604) 105 YORK INTERNA TIONAL in series to achieve a 900VDC capability for the DC link. It is important the voltage is shared equally from the junction of the center or series capacitor con nec tion, to the negative bus and to the positive bus. This center point should be approximately ½ of the total DC link voltage. “ HARMONIC FI[...]

YORK INTERNA TIONAL 106 FORM 160.55-O1 (604) Enabled by a Service T echnician (fol low ing in struc tions in Service Manual 160.55-M1) and the Leaving Chilled Liquid temperature Setpoint is <38.0°F . “ EV APORA TOR – TRANSDUCER OR LEA V ING LIQUID PROBE ” A possible defective Evaporator pressure T ransducer or Leaving Chilled Liquid tempe[...]

FORM 160.55-O1 (604) 107 YORK INTERNA TIONAL “ DISCHARGE – HIGH TEMPERA TURE ” The discharge temperature, as sensed by the Dis char ge T emperature Thermistor , has increased to > 220.0°F . The chiller can be started after the tem per a ture de creas es to < 220.0°F and the COMPRESSOR switch is placed in the Stop-Reset (O) position. ?[...]

YORK INTERNA TIONAL 108 FORM 160.55-O1 (604) MOD “B” SOLID ST A TE ST ARTER SAFE TY SHUTDOWN MES SAG ES “LCSSS SHUTDOWN – REQUESTING F AUL T DA T A...” 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 commun[...]

FORM 160.55-O1 (604) 109 YORK INTERNA TIONAL “ VSD SHUTDOWN – REQUESTING F AUL T D ATA ” The VSD has shut down the chiller and the control cen ter has not yet received the cause of the fault from the VSD, via the serial com mu ni ca tions link. The VSD shuts down the chiller by opening the Motor Control- ler “VSD Stop Contacts” (located o[...]

YORK INTERNA TIONAL 11 0 FORM 160.55-O1 (604) VSD Logic Board is pressed and the COMPRESSOR switch is placed in the Stop-reset (O) position. "VSD – HIGH PHASE C INVER TER BASE- PLA TE TEMPERA TURE” (VSD part number 371-03789-xxx (503HP 60Hz; 419HP 50Hz (Flash Memory Card version C.MLM.02.04.xxx and later) The chiller has shutdown because t[...]

FORM 160.55-O1 (604) 111 YORK INTERNA TIONAL THIS P AGE INTENTIONALL Y LEFT BLANK TO MAINT AIN FORMA T 2[...]

YORK INTERNA TIONAL 11 2 FORM 160.55-O1 (604) SECTION 3 PRINTERS FIG. 43 – PRINTERS 23887A OKIDA T A MICROLINE 184 23889A WEIGH-TRONIX SEIKO DPU-414 00085VIP Printers[...]

FORM 160.55-O1 (604) 11 3 YORK INTERNA TIONAL A printer can be connected to the Control Center ’ s Microboard to print the following reports. The screen from which each report can be generated is listed in pa ren the sis. • Status - Present system parameters (Printer , Home) • Setpoints - Present programmed values of all set- points (Printer [...]

YORK INTERNA TIONAL 11 4 FORM 160.55-O1 (604) codes are sent from the Control Center to the print er . For example, W eigh -T ronix printers require a con trol code to select 40 column width. This same code is interpreted by the Okidata printer as an in struc tion to print wide characters. In some in stanc es, a printer will ignore a code it cannot[...]

FORM 160.55-O1 (604) 11 5 YORK INTERNA TIONAL Model 1220 - Con Þ gure Menu Baud= 1200 Data Bits = 8 Stop Bits = 1 Hshake = Busy-Line Cols = 32 Invert = No Font = 5 x 8 Mag = None - Custom Menu Auto Seq = No Zero = 0 Pound sign = # _(Underscore) Busy invert = no Online/of ß ine = yes Ext Ch Set = no Print ready = yes Set Clock = not used Reset Seq[...]

YORK INTERNA TIONAL 11 6 FORM 160.55-O1 (604) YORK UPDATE CHILLER ID 0 YORK Update Chiller ID ------------------------------------------------------------------------- (c) 1997 – 2001 YORK INTERNATIONAL CORPORATION SYSTEM RUN LEAVING CHILLED LIQUID CONTROL WARNING – PURGE – FLOAT SWITCH ERROR [List all warnings presently active] Controls C.ML[...]

FORM 160.55-O1 (604) 11 7 YORK INTERNA TIONAL Phase C Current = 190 A Phase A Temperature = 88 ~F Phase B Temperature = 89 ~F Phase C Temperature = 75 ~F [Skip the following section if Motor Type is not VSD] Variable Speed Drive ------------------------------------------------------------------------- Motor Run = On % Full Load Amps = 94 % Pre-Rota[...]

YORK INTERNA TIONAL 11 8 FORM 160.55-O1 (604) FIG. 45 – SAMPLE PRINTOUT (SETPOINT REPORT) YORK SETPOINTS CHILLER ID 0 ------------------------------------------------------------------------- © 1997 - 1999 YORK INTERNATIONAL COR PO - RA TION Mon 21 jun 1999 1:27 :39 PM Software Versions -----------------------------------------------------------[...]

FORM 160.55-O1 (604) 11 9 YORK INTERNA TIONAL FIG. 45 – CONTINUED 3 Remote Modem Current Limit = 100 % Pulldown Demand Limit = 100 % Pulldown Demand Time = 0 Min [Skip the following section if Motor Type is not Mod A SSS] Liquid-Cooled Solid State Starter ------------------------------------------------------------------------- Local Motor Curren[...]

YORK INTERNA TIONAL 120 FORM 160.55-O1 (604) FIG. 47 – SAMPLE PRINTOUT (SALES ORDER RE PORT) YORK SALES ORDER CHILLER ID 0 © 1997 - 1999 YORK INTERNATIONAL COR PO RA TION Mon 21 jun 1999 1:28:46 PM Order Information --------------------------------------------------------------------------- Commissioning date Job Name Job Location Model Number Y[...]

FORM 160.55-O1 (604) 121 YORK INTERNA TIONAL 3 YORK HISTORY 1 CHILLER ID 0 --------------------------------------------------------------------------- © 1997 - 1999 YORK INTERNATIONAL COR PO RA TION MSYSTEM READY TO START LCSSS – LOGIC BOARD POWER SUPPLY [List any warnings that were active at the time of shutdown] Controls C.MLM.02.03.102 Run Ti[...]

YORK INTERNA TIONAL 122 FORM 160.55-O1 (604) FIG. 48 – CONTINUED Printers YORK SETPOINT CHANGE LOG CHILLER ID 163 © 1997 – 2000 YORK INTERNATIONAL COR PO RA TION Mon 09 Oct 2000 3:33:47 PM Log Entry 1 Evaporator - Leaving Chilled Local Setpoint --------------------------------------------------------------------------- Date = 05 Oct 2001 Time [...]

FORM 160.55-O1 (604) 123 YORK INTERNA TIONAL 3 FIG. 50 – SAMPLE PRINTOUT (TREND DA T A NEW OR EXISTING POINTS) YORK TREND CHILLER ID 163 © 1997 – 2000 YORK INTERNATIONAL COR PO RA TION Mon 09 Oct 2000 3:33:47 PM Data 1: Leaving Chilled Liquid Temperature Data 2: Return Chilled Liquid Temperature Data 3: Evaporator Pressure Data 4: Leaving Cond[...]

YORK INTERNA TIONAL 124 FORM 160.55-O1 (604) ST ART -UP PROCEDURE Pre-Starting Prior to starting the chiller ob serve the OptiV iew Con- trol Center . Make sure the Display reads “SYS TEM READY T O ST AR T”. T o pre-start the chiller use the fol low ing pro ce dure: 1. OIL HEA T ER - The oil heater must be en er gized for 12 hours prior to star[...]

FORM 160.55-O1 (604) 125 YORK INTERNA TIONAL 4 Any mal func tions which oc cur dur ing “STOP/ RE SET” are also dis played. When the chiller is shut down, the prerotation vanes will close au to mat i cal ly to pre vent loading the com- pres sor on start-up. When the chill er starts to op er ate, the fol low ing au to mat ic sequences are ini ti [...]

YORK INTERNA TIONAL 126 FORM 160.55-O1 (604) "SYSTEM SHUTDOWN" DISPLA Y MESSA GE "SYSTEM R UN" "SYSTEM PRELUBE" (OIL PUMP PRE-R UN) "SYSTEM COASTDO WN" (OIL PUMP POST -RUN) 0 25 30 330 1800  (0.4) (0.5) (5.5) (30) ST AR T REST ART (IF FIVE SUCCESSIVE REST ARTS HA VE?[...]

FORM 160.55-O1 (604) 127 YORK INTERNA TIONAL CHECKING OP ER A TION During operation, the fol low ing con di tions should be periodically checked: 1. On start ing, the prerotation vanes should re main closed. 2. Be sure the oil pump is operating while unit is run- ning. 3. Check Oil Pressure display . A gradual de crease in bearing oil pres sure of [...]

YORK INTERNA TIONAL 128 FORM 160.55-O1 (604) System Op er at ing Pro ce dures An optional sta tus printer is available for this purpose; or , Fig. 48 shows a log sheet used by YORK personnel for recording test data on chillers. It is avail able from the factory in pads of 50 sheets each under Form No. 160.44-F6 and may be ob tained through the near[...]

FORM 160.55-O1 (604) 129 YORK INTERNA TIONAL 3. Compressor Drive Motor (See motor man u fac tur er ’ s main te nance and service in struc tion sup plied with unit) a.Clean air passages and windings per manufacturer ’ s in struc tions. b. Meg motor wind ings - See Fig. 65 for de tails. c. Relubricate ball bear ings. Don’ t over look motor driv[...]

YORK INTERNA TIONAL 130 FORM 160.55-O1 (604) System Op er at ing Pro ce dures con dens er wa ter , and cool ing tower fans will stop au to mat i cal ly . The oil pump will continue to run for a pe ri od of 150 sec onds. The oil pump will then stop au to mat i cal ly . Once stopped, the “SYS TEM COASTDOWN” display will be re placed by “SYS- TE[...]

FORM 160.55-O1 (604) 131 YORK INTERNA TIONAL Hz immersion type. A separate three phase pow er sup- ply is required except when ordered with a YORK Solid State Starter or V ariable Speed Drive. A gravity ß ow oil res er voir is pro vid ed to feed the bearings and gears dur- ing coast down in the event of a power failure. CAPACITY RE DUC TION - Prer[...]

YORK INTERNA TIONAL 132 FORM 160.55-O1 (604) FIG. 59 – SCHEMA TIC DRAWING – (YT) COM PRES SOR LUBRICA TION SYSTEM LD03278 System Components De scrip tion[...]

FORM 160.55-O1 (604) 133 YORK INTERNA TIONAL Application #CT’ s Furnished in Motor T er mi nal Box E-M Starter 3 SS Starter 0 VS Drive 0 COMPRESSOR LUBRICA TION SYSTEM The chiller lubrication system consists of the oil pump, oil Þ l ter , oil cooler and all interconnecting oil pip ing and passages. (See Fig. 59) There are seven main points with [...]

YORK INTERNA TIONAL 134 FORM 160.55-O1 (604) System Components De scrip tion V ictaulic grooves are welded to the water boxes. These nozzle connections are suit able for V ictaulic cou plings, weld ing or ß anges (300 PSI has ß ang es). 1/2" cou pling and separable well are lo cat ed in the entering and leav ing chilled liquid nozzles for te[...]

FORM 160.55-O1 (604) 135 YORK INTERNA TIONAL SECTION 6 OPERA TIONAL MAINTENANCE OIL RETURN SYSTEM 6 OIL RETURN The oil return system con tin u ous ly main tains the prop er oil level in the compressor oil sump. (See Fig. 57.) High pressure condenser gas ß ows con tin u ous ly through the eductor inducing the low pressure, oil rich liquid to ß ow [...]

YORK INTERNA TIONAL 136 FORM 160.55-O1 (604) Operational Maintenance LD00470 FIG. 61 – ASSEMBL Y OF DEHYDRA TOR[...]

FORM 160.55-O1 (604) 137 YORK INTERNA TIONAL FIG. 62 – CHARGING OIL RESERVOIR WITH OIL 25721A OIL CHARG ING V AL VE LD00472 at the charg ing valve until after the air is forced out by pumping a few strokes of the oil pump. This Þ lls the lines with oil and pre vents air from being pumped into the sys tem. 3. Open the oil charging valve and pump [...]

YORK INTERNA TIONAL 138 FORM 160.55-O1 (604) T roubleshooting SECTION 7 TROUBLE SHOOTING T ABLE 1 – CAUSES OF NOR MAL AND SAFE TY SYS TEM SHUT DOWNS IN AC COR DANCE WITH THE CONTROL CENTER DISPLA Y CONTROL CENTER DISPL A Y GOVERNING CONTROL FUNCTION DA Y OF TIME CAUSE OF METHOD OF DESCRIPTION OPERA TING POINT WEEK OF DA Y SHUTDOWN REST ART ON RIS[...]

FORM 160.55-O1 (604) 139 YORK INTERNA TIONAL 7 T ABLE 1 – CAUSES OF NOR MAL AND SAFE TY SYS TEM SHUT DOWNS IN AC COR DANCE WITH THE CONTROL CENTER DISPLA Y - CONTINUED PROGRAMMED ST ART -UP OF PROBABLE CAUSE SETPOINTS SYSTEM AFTER AND SERVICE BY OPERA TOR SHUTDOWN REQUIRED 4°F below chilled water Automatic Restart when water reaches setpoint. Sy[...]

YORK INTERNA TIONAL 140 FORM 160.55-O1 (604) T ABLE 1 – CAUSES OF NOR MAL AND SAFE TY SYS TEM SHUT DOWNS IN AC COR DANCE WITH THE CONTROL CENTER DISPLA Y - CONTINUED SHUTDOWN CAUSE CON TROL CENTER DISPL A Y GOVERNING CONTROL FUNCTION DA Y OF TIME CAUSE OF METHOD OF DESCRIPTION OPERA TING POINT WEEK OF DA Y SHUTDOWN REST ART ON RISE ON F ALL MON. [...]

FORM 160.55-O1 (604) 141 YORK INTERNA TIONAL T ABLE 1 – CAUSES OF NOR MAL AND SAFE TY SYS TEM SHUT DOWNS IN AC COR DANCE WITH THE CONTROL CENTER DISPLA Y - CONTINUED PROGRAMMED START -UP OF PROBABLE CAUSE SETPOINTS SYSTEM AFTER AND SERVICE B Y OPERA TOR SHUTDOWN REQUIRED Will start at 59 PSID when compressor switch is This Shutdown is provided to[...]

YORK INTERNA TIONAL 142 FORM 160.55-O1 (604) T roubleshooting T ABLE 2 – OPERA TING ANAL YSIS CHART RESUL TS POSSIBLE CAUSE REMEDY 1. SYMP TOM: ABNORMALL Y HIGH DIS CHARGE PRES SURE T emperature difference between liquid Air in condenser . Purge unit operates automatically to take refrigerant out and water off condenser care of this condition. T [...]

FORM 160.55-O1 (604) 143 YORK INTERNA TIONAL RESUL TS POSSIBLE CAUSE REMEDY 6. SYMP TOM: UNUSUALL Y HIGH OIL PRES SURE DEVEL OPS WHEN OIL PUMP RUNS Unusually high oil pressure is displayed High oil pressure. T ransducer defective. Replace low or high oil pressure trans duc er . when the oil pressure display key is Relief valve is misadjusted. Adjus[...]

YORK INTERNA TIONAL 144 FORM 160.55-O1 (604) Maintenance SECTION 8 MAINTENANCE RENEW AL P ARTS For any required Renewal Parts re fer to Forms listed on page 4. LEAK TEST ING DUR ING OP ER A TION The refrigerant side of the sys tem is care ful ly pressure test ed and evac u at ed at the factory . After the system is in op er a tion under load, the h[...]

FORM 160.55-O1 (604) 145 YORK INTERNA TIONAL 8 *GAUGE ABSOLUTE INCHES OF MERCUR Y (HG) PSIA MILLIMETERS OF MICRONS BELOW ONE ST ANDARD A TMOSPHERE MERCURY (HG) 0 14.696 760 760,000 212 10.24* 9.629 500 500,000 192 22.05* 3.865 200 200,000 151 25.98* 1.935 100 100,000 124 27.95* .968 50 50,000 101 28.94* .481 25 25,000 78 29.53* .192 10 10,000 52 29[...]

YORK INTERNA TIONAL 146 FORM 160.55-O1 (604) Maintenance EV ACUA TION AND DEHYDRA TION OF UNIT V ACUUM TESTING After the pressure test has been completed theV acuum test should be conducted as follows: 1. Connect a high ca pac i tyV acuum pump, with in di - ca tor , to the sys tem charg ing valve as shown in Fig. 63 and start the pump (see “V acu[...]

FORM 160.55-O1 (604) 147 YORK INTERNA TIONAL FIG. 64 – SA TURA TION CURVE LD00474 SHELL CODES COOLER COMPRESSOR G0, G1, G3 B 890 900 G0, G1, G3 C 890 900 H1, H3 − 970 975 J1, J3 − 1130 1125 K1, K3 − 1270 1275 G0, G1, G3 E 890 900 H1, H3 − 970 975 J1, J3 − 1130 1125 K1, K3 − 1270 1275 L1, L3 − 1390 1400 K4, K6 F 1390 1400 K7, K9 − [...]

YORK INTERNA TIONAL 148 FORM 160.55-O1 (604) CHECKING THE REFRIGERANT CHARGE DURING UNIT SHUT DOWN HANDLING REFRIGERANT FOR DISMANTLING AND REP AIRS The refrigerant charge is speci Þ ed for each chiller mod el (See T able 4). Char ge the cor rect amount of re frig er ant and record the level in the cooler sight glass. The re frig er ant char ge sh[...]

FORM 160.55-O1 (604) 149 YORK INTERNA TIONAL LD00475 FIG. 65 – DIAGRAM, MEGGING MOTOR WIND INGS GENERAL Maintenance of condenser and cooler shells is im- por tant to provide trouble free op er a tion of the chiller . The wa ter side of the tubes in the shell must be kept clean and free from scale. Proper main te nance such as tube clean ing, and [...]

YORK INTERNA TIONAL 150 FORM 160.55-O1 (604) LD00476 TEMPERA TURE – °F MEGOHMS FIG. 66 – MOTOR ST A TOR TEMPERA TURE AND INSULA TION RE SIS T ANC ES Minimum Insulation Resistance vs. T emperatur e (per IEEE Std 43) Open Motors Maintenance[...]

FORM 160.55-O1 (604) 151 YORK INTERNA TIONAL TUBE CLEAN ING PRO CE DURES Brush Cleaning of T ube If the tube foul ing con sists of dirt and sludge, it can usu al ly be re moved by means of the brushing process. Drain the water sides of the circuit to be cleaned (cool ing wa ter or chilled water) remove the heads and thor ough ly clean each tube wit[...]

YORK INTERNA TIONAL 152 FORM 160.55-O1 (604) COMPRESSOR ELECTRICAL CONTROLS Maintenance for the compressor assembly consists of check ing the operation of the oil return system and chang- ing the dehydrator, checking and changing the oil, check- ing and changing the oil Þ lters, checking the op er a tion of the oil heater, checking the operation o[...]

FORM 160.55-O1 (604) 153 YORK INTERNA TIONAL COOLER AND CONDENSER The major por tion of maintenance on the condenser and cooler will deal with the maintaining of the water side of the con dens er and cooler in a clean condition. The use of un treat ed water in cool ing tow ers, closed water systems, etc. frequently re sults in one or more of the fo[...]

YORK INTERNA TIONAL 154 FORM 160.55-O1 (604) SECTION 10 OPTISA VE ENERGY ANAL YSER FEA TURE The OptiSave Energy Analyzer Feature reveals the advantage of a compressor motor variable speed drive. It calculates the amount of energy that has been saved by having a variable speed drive instead of a constant speed drive. The savings are determined by ca[...]

FORM 160.55-O1 (604) 155 YORK INTERNA TIONAL NOTES[...]

800-861-1001 www .york.com P .O. Box 1592, Y ork, Pennsylvania USA 17405-1592 Subject to change without notice. Printed in USA Copyright © by Y ork International Corporation 2004 ALL RIGHTS RESER VED Form 160.55-O1 (604) Supersedes: 160.55-O1 (402)[...]