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System fundamentals

The following section contains information about the system components and operation of the

YORK

Model YVAM™ Centrifugal Liquid Chiller.

System components

The YORK Model YVAM Centrifugal Liquid Chiller is completely factory-packaged and includes the

following components:

•

Evaporator

•

Condenser

•

Condenser fans

•

Condenser fan variable speed drives

•

Compressor

•

Motor

•

Variable speed drive (VSD)

•

Battery power panel

•

OptiView™ Control Center

•

All interconnecting unit piping and wiring

See Figure 5, Figure 6, and Figure 7 for YVAM chiller components.

Figure 5: Control panel side view

Callout Component

Control panel

Signal box for condenser fan variable speed

drive, typical both sides

Condenser sections, typically ten with two fans

each

Evaporator water nozzles, inlet at the bottom

and outlet at the top

Waterbox heater power connections

UPS power panel

YVAM Control Center

Содержание YORK YVAM 0350

Страница 1: ...Form Number 160 88 OM1 122 New Release Operation and Maintenance Issue Date 2022 01 14 YVAM Control Center Centrifugal Liquid Chiller with R 134a Refrigerant...

Страница 2: ...2 YVAM Control Center...

Страница 3: ...ew control center 17 System operation description 19 Capacity control 19 Anti surge minimum frequency 20 Smart Freeze 20 Surge protection 21 System operating procedures 22 Pre starting 22 Start up 22...

Страница 4: ...ing controller details screen 44 Surge screen 46 Variable geometry diffuser screen 48 Power panel screen 49 Capacity control screen 51 Variable speed drive screen 53 Variable speed drive VSD details s...

Страница 5: ...tenance 121 Preventative maintenance 121 Renewal parts 122 Operating inspections 122 Weekly 122 Monthly 122 Semi annually 122 Annually 123 Checking system for leaks 123 Leak testing 123 Vapor connecti...

Страница 6: ...g evaporator waterbox heaters WBH1 and WBH2 141 Testing evaporator shell heaters EVH1 and EVH2 141 Testing heat trace for drive coolant HT1 and HT2 141 Testing the VGD actuator heater mat 142 Testing...

Страница 7: ...ce personnel It is expected that these individuals possess independent training that will enable them to perform their assigned tasks properly and safely It is essential that prior to performing any t...

Страница 8: ...licability of these documents the technician should verify whether the equipment has been modified and if current literature is available from the owner of the equipment prior to performing any work o...

Страница 9: ...Nomenclature Figure 1 System nomenclature Figure 2 Compressor nomenclature Figure 3 Vessel nomenclature 9 YVAM Control Center...

Страница 10: ...Figure 4 Variable speed drive nomenclature YVAM Control Center 10...

Страница 11: ...drives Compressor Motor Variable speed drive VSD Battery power panel OptiView Control Center All interconnecting unit piping and wiring See Figure 5 Figure 6 and Figure 7 for YVAM chiller components F...

Страница 12: ...or Figure 7 Variable speed drive end view Callout Component Callout Component A Variable speed drive B UPS power panel C Single point power panel Compressor The compressor is a single stage centrifuga...

Страница 13: ...alves as standard options Waterboxes The removable compact waterboxes are fabricated of steel The design working pressure is 150 psig 1 034 kPa and the boxes are tested at 225 psig 1 551 kPa Integral...

Страница 14: ...s down due to the loss of main chiller power Optional service isolation valves Optional service isolation valves include two on the discharge lines to each condenser section and one on the liquid line...

Страница 15: ...Figure 8 System piping and instrumentation diagram P ID 15 YVAM Control Center...

Страница 16: ...oling liquid supply strainer SV 1 Discharge service valve condenser section 1 SV 2 Discharge service valve condenser section 2 TE 1 Evaporator water on thermistor TE 2 Evaporator water off thermistor...

Страница 17: ...ht side of the panel are primarily used for navigation between the system screens Five additional buttons are located at the base of the display The button functions are redefined based on the current...

Страница 18: ...mperature setpoint adjustment BAS coms Analog signal 0 VDC to 10 VDC 2 VDC to 10 VDC 0 mA to 20 mA or 4 mA to 20 mA or pulse width modulation PWM Remote Current Limit setpoint adjustment BAS coms Anal...

Страница 19: ...liquid circuit cycle The refrigerant vapor that is produced by the boiling action in the evaporator is drawn into the suction of the compressor The rotating impeller increases its pressure and temper...

Страница 20: ...d surge for the lift the VGD is driven toward closed When the VGD reaches closed or the minimum position allowed for the operating condition the HGBP if present is driven toward open Also High Condens...

Страница 21: ...a selectable time period to a selectable threshold If the number of surge events Surge Window Count detected in the time period programmed as the Count Window setpoint 1 minute to 5 minutes default 5...

Страница 22: ...he equipment room dewpoint for applications using cooling sources other than evaporative air exchange methods such as wells bodies of water and chilled water The temperature control valve must be the...

Страница 23: ...ue is determined from several settings depending on the chiller control source selected according to the following table Table 4 Input current limit threshold Control source Active input current limit...

Страница 24: ...defined as 10 F 20 F 30 F or 40 F 12 2 C 6 7 C 1 1 C or 4 4 C using the Local Leaving Chilled Liquid Temperature Range setting from the panel For example if this Range setpoint is programmed for 10 F...

Страница 25: ...o change temperature without shutting down first Automatic temperature restart The Leaving Chilled Liquid Temperature Cycling Offset Restart setting on the panel can be programed to set the temperatur...

Страница 26: ...lt The OptiView Control Center can be programmed to start and stop automatically for a maximum of once each day whenever required See Schedule screen in OptiView control center functions and navigatio...

Страница 27: ...the winter season use the following procedure Test all system joints for refrigerant leaks with a leak detector If any leaks are found they must be repaired before allowing the system to stand for a l...

Страница 28: ...ves open In applications where a freeze protection fluid is not used but continuous power to the chiller control panel chilled fluid circuit pumps and evaporator heaters can be guaranteed during perio...

Страница 29: ...kW 1 560 Shipping data 2 Unit length in 482 2 Unit width in 88 6 Unit height in 101 6 Shipping weight lb 25 100 Operating weight lb 26 600 Note 1 The minimum chilled water flow rate is for full load...

Страница 30: ...programmable controls in the system fall into one of the categories described in the following sections Access level The OptiView panel restricts certain operations based on password entry by the ope...

Страница 31: ...the new programmed value If out of range the value is not accepted and the user is prompted to try again Manual controls Some buttons are used to perform manual control functions These may involve ma...

Страница 32: ...language If a language other than English is displayed an English speaking person should navigate to the User screen using the preceding Navigation chart and select English Analog input ranges The fol...

Страница 33: ...ptional 0 0 126 1 F 17 7 52 3 C Discharge Temperature 31 8 226 3 F 0 1 107 9 C Condenser Pressure 0 0 300 0 psig 0 0 2069 kPag Condenser Temperature 1 98 7 160 1 F 72 6 71 7 C Evaporator Pressure 0 0...

Страница 34: ...kW This displays the total input power used by the system Operating Hours Displays the cumulative operating hours of the chiller Motor Run LED This LED is on when the digital output that gives the var...

Страница 35: ...chiller performs a soft shutdown and disables the remote run permissive Table 12 Navigation Button Description System This screen provides additional system information Evaporator This screen provide...

Страница 36: ...ng Displays the temperature of the liquid as it enters the evaporator Chilled Liquid Temperature Setpoint Displays the programmed temperature setpoint for leaving chilled liquid It is the local value...

Страница 37: ...Leaving Chilled Liquid Temperature Setpoints Setpoint Displays the present setpoint to which the chiller is operating whether controlled locally or remotely Leaving Chilled Liquid Temperature Setpoint...

Страница 38: ...s programmable over the range of 36 0 F to 90 0 F for water or 10 0 F to 70 0 F for brine If Smart Freeze is enabled the range is 36 0 F to 70 0 F for water When the chiller is running performing capa...

Страница 39: ...erence between the Condenser Refrigerant temperature and the Drop Leg Refrigerant temperature The Condenser Refrigerant temperature is represented by the Condenser Saturation temperature High Pressure...

Страница 40: ...ge superheat calculated as Discharge Temperature Condenser Saturation temperature Motor Run LED Indicates ON when the digital output run command to the variable speed drive is on Input Full Load Amps...

Страница 41: ...allows viewing and calibrating the VGD feature Programming requires a Service access level Motor Details Moves to the screen showing motor operating details Power Panel Moves to the subscreen that al...

Страница 42: ...designated W for the Impeller End W3 Current Displays the magnetizing current to the lower bearing on the radial axis designated W for the Impeller End V1 Current Displays the magnetizing current to...

Страница 43: ...ital Input MBC Outputs Rotation Allowed LED Indicates the MBC Rotation Allowed contacts are closed by the control Digital Input MBC Outputs MBC Fault LED Indicates the MBC Fault Contacts are opened in...

Страница 44: ...Displays the temperature measured at the impeller end bearing assembly A13 Unbalance B13 Unbalance Magnitude of motion at 1x rotation in each of two vectors at the 1 stage impeller end A24 Unbalance B...

Страница 45: ...ew on power up This is based on the compressor model number on the Sales order screen AZ Vibration BZ Vibration Magnitude of runout motion in each of two vectors Landing Counters Display the number of...

Страница 46: ...at have occurred in the last Count Window minutes This value is reset when the chiller shuts down Surge Window Count Displays the number of surge events that have occurred in the last 1 to 5 minutes a...

Страница 47: ...surge situation Count Limit Operator Allows the user to define the maximum number of surge events 4 to 20 default 15 that can occur within a defined period of time before an Excess Surge situation is...

Страница 48: ...d to 100 fully open Displayed as XXX until calibration procedure is performed by a qualified service technician VGD Command Displays the position command from the control to the VGD Surge Detected LED...

Страница 49: ...mode using line power to supply loads and any necessary current to the power storage battery UPS Inverter LED Indicates the UPS is providing power from the storage battery UPS Fault LED Indicates the...

Страница 50: ...n Button Description Home Causes an instant return to the Home screen Compressor Causes an instant return to the Compressor screen VSD Causes an instant return to the Variable Speed Drive screen YVAM...

Страница 51: ...t Remote Input Current Limit and Pulldown Current Limit or BAS ISN current limit Motor Current FLA Displays the percentage of maximum motor current delivered to the motor determined from the highest o...

Страница 52: ...ure Head Pressure Displays the difference between condenser refrigerant pressure and evaporator refrigerant pressure Outside Ambient Air Temperature Displays Outside Ambient Air Temperature which is u...

Страница 53: ...e value is nonzero VSD Output Voltage Displays the output voltage measured to the motor VSD Output Frequency Displays the present output frequency to the motor Max Chiller Frequency Displays the maxim...

Страница 54: ...t Pulldown Demand Limit 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...

Страница 55: ...tes the drive DC Bus has been pre charged Input Current Limit LED Indicates the chiller input current is at the Job FLA limit Cooling System LED Indicates the relay controlling the drive water pump ou...

Страница 56: ...Input Current RMS L1 L2 L3 Displays the three phase input current values measured by the variable speed drive Output Voltage RMS Phase A B C Displays the three phase output RMS voltages across each li...

Страница 57: ...lve Position Displays the auxiliary drive cooling offset minimum valve position VSD HX Approach Temp Displays the drive HX approach temperature Expected VSD HX Approach Temperature Displays the expect...

Страница 58: ...ents more than 2 of the 3 sensors at either end of the motor to be disabled When an individual temperature is disabled the temperature data box does not appear Any input that registers as open display...

Страница 59: ...dicated here Motor Cooling Valve Command Output to the motor cooling valve in percent from 0 closed to 100 opened Motor Cooling Control State Displays whether the motor cooling valve is in auto or man...

Страница 60: ...hutdown Displays the Leaving Chilled Liquid Temperature at which the chiller will shut down to avoid over cooling LCHLT below setpoint in low load situations Leaving Chilled Liquid Temperature Cycling...

Страница 61: ...ng an offset above the Leaving Chilled Liquid Temperature setpoint It is programmable over a range of 0 F to 70 F Local Input Current Limit Operator Allows the user to specify the maximum allowed chil...

Страница 62: ...ays the BAS current limit Remote Analog Current Limit Displays the remote analog current limit Remote PWM Current Limit Displays the remote PWM current limit Input Current Limit Control Control Source...

Страница 63: ...elect the Control Source for cooling control Local BAS Hardwire Select Current Limit Operator and above Allows the user to select the Control Source for current limit Local BAS Hardwire Table 49 Navig...

Страница 64: ...Line Voltage Displays the chiller line voltage setting Line Frequency Displays the chiller line frequency setting Hot Gas Bypass Displays the Hot Gas Bypass Enable or Disable Setting Chilled Liquid P...

Страница 65: ...ning In addition when preparing for prolonged shutdown the clock should once again be disabled 12 24Hr Operator Allows the user to specify the format in which the time will be presented This setpoint...

Страница 66: ...creen displays the chiller schedule There are no other display options Table 53 Programmable Button Access Description Standard Week Start Stop Times Operator For each day of the week the user may spe...

Страница 67: ...erator Places a selection box around a start time for a given day Use or cursor buttons to place the box around the desired start or stop time for a given day Print Operator Generates a Schedule print...

Страница 68: ...e the language for all screens The preferred language is selected by scrolling through the list of those available English is the default language and is selected by pressing the button when the dialo...

Страница 69: ...ither key places a green selection box around the first changeable parameter Use the and buttons to place the selection box around the desired parameter to be changed With the selection box around the...

Страница 70: ...nter to begin printing status reports beginning at the programmed start time and recurring at the interval defined above Printer Type Operator Define the printer type connected to the chiller system P...

Страница 71: ...ystem Compressor Model Factory defined model number of the compressor Critical entry for correct chiller operation Technicians see YORK YVAM Service Manual Form 160 88 M2 Evaporator Model Factory defi...

Страница 72: ...start signal was received Value is reset to zero when the chiller enters coastdown It remains at zero while shutdown and during MBC Startup Number of Starts Displays the number of the starts the chil...

Страница 73: ...the last 10 safety or cycling shutdowns that occur while the system is running or stopped Table 68 Programmable Button Description Print History Generates a report listing the status of the parameters...

Страница 74: ...r starter and options applied Table 70 Display only fields Field LED name Description History Printout Displays an on screen printout of the system parameters Table 71 Programmable Button Description...

Страница 75: ...meters can be left there for monitoring by operations personnel This screen display attributes assigned to Custom screen There are no other display options Table 73 Programmable Button Access Descript...

Страница 76: ...Pressing the Select key places a green colored selection box around Custom Slot 1 If it is desired to change an already entered parameter use the 5 and 6 buttons to place the selection box around the...

Страница 77: ...d parameter and associated Y axis labeling is color coordinated The parameters are sampled at the selected data collection interval and plotted using 450 data points across the X axis If the actual va...

Страница 78: ...set to New all data collected after pressing this button will be sent to the printer as it is collected If set to Disabled no data is sent to the printer See Printing for printout examples Data Select...

Страница 79: ...sed to enter the slot numbers and the minimum and maximum Y axis values of each parameter to be trended Pressing this button places a yellow box around Data Point 1 Slot Number Use the and navigation...

Страница 80: ...t higher Max value that makes the span evenly divided by 20 For example if 0 0 is selected as the Min and 69 0 is selected as the Max the program inserts 70 0 as the Max value If the parameter selecte...

Страница 81: ...a subscreen that lists the slot numbers of the most commonly monitored parameters The preferred parameters to be plotted are selected from this screen Triggers Displays the Advanced trend setup scree...

Страница 82: ...s Slot Numbers into Data Points 1 through 6 Table 82 Display only fields Field LED name Description Slot Numbers These are the slot numbers of the most commonly used parameters Table 83 Programmable B...

Страница 83: ...Control Mode 305 System Language 306 Chiller ID Number 307 Display Mode Security 336 Log in Level 337 Log in User ID Schedule 512 Is Schedule Enabled Evaporator 1792 Leaving Chilled Liquid Temperatur...

Страница 84: ...Is Flow Switch Closed 1795 Is Pump On 1796 Local Temperature Setpoint 1797 Remote Analog Temperature Setpoint 1798 Remote BAS ISN Temperature Setpoint 1799 Remote Modem Temperature Setpoint 1800 Selec...

Страница 85: ...k 3055 L3 Input Voltage Peak 2872 L1 Input Voltage RMS 2873 L2 Input Voltage RMS 2874 L3 Input Voltage RMS 3008 L1 Input Current RMS 3009 L2 Input Current RMS 3010 L3 Input Current RMS 3018 Phase A Ou...

Страница 86: ...erride Threshold 18273 Control State 18274 Active Load Limit 18288 Speed of Sound 18289 Isentropic Head 18290 Omega 18291 Surge Mach 18292 Surge Frequency VGD Command 18293 Anti Surge Minimum Frequenc...

Страница 87: ...21077 Z12 Hard Landing Counter 21049 A13 Unbalance 21050 B13 Unbalance 21051 A24 Unbalance 21052 B24 Unbalance 21053 Az Vibration 21054 Bz Vibration 21078 SDR Counter 21079 MBC Input Voltage 21154 MBC...

Страница 88: ...on a Safety shutdown The cause of the shutdown is still in effect and is displayed on the Details line of the Status Bar The chiller can be started after the Safety condition clears and the Operator...

Страница 89: ...or a state outside of chiller run It is set when the variable speed drive indicates a precharge or pre regulated state or DC Bus voltage 50 V in the stopped state A countdown timer shows with this mes...

Страница 90: ...n the MBC Alive contacts I O board TB3 71 Warning messages Table 89 Warning messages Message Description WARNING CONDENSER FREEZE THREAT FROM LOW PRESSURE While the chiller state is Stopped the Satura...

Страница 91: ...ubcooler effectiveness is Condenser Sat Temp Drop leg refrigerant temp Cond Sat Temp Entering Condenser Liquid Temp To clear message press WARNING RESET button on Home Screen when logged in at OPERATO...

Страница 92: ...LOCK FAILURE During the initialization process that occurs when power is applied to the control center test data is written to a location in the BRAM battery backed memory device IC location U52 on Mi...

Страница 93: ...in charge mode WARNING VSD INPUT VOLTAGE IMBALANCE Line voltage imbalance is calculated for every drive communications cycle as where Vab Vbc and Vca are line to line total rms voltages received from...

Страница 94: ...TROL PANEL POWER FAILURE A Control Power failure has occurred If the power failure occurred while the chiller was running it will automatically restart when power is restored This message can indicate...

Страница 95: ...conds and then replaced with one of the other MBC fault messages in this section MBC SPEED SIGNAL FAULT This Cycling Shutdown is set when the MBC looses the speed signal that is expected from the driv...

Страница 96: ...cron from center in the orthogonal radial axis designated W at the opposite impeller end radial magnetic bearing during Levitation or Rotation mode over a 7 second window approximately 2 3 of the air...

Страница 97: ...losed before shutting down the chiller The chiller automatically restarts when the contacts close UPS LINE LOW BATTERY VOLTAGE This cycling fault initiates a soft shutdown if it is set while the chill...

Страница 98: ...R CURRENT See the previous message VSD HIGH PHASE A MOTOR CURRENT VSD HIGH PHASE C MOTOR CURRENT See the previous message VSD HIGH PHASE A MOTOR CURRENT VSD INITIALIZATION FAILED When power is connect...

Страница 99: ...OR BASEPLATE TEMPERATURE VSD LOW PHASE C MOTOR BASEPLATE TEMPERATURE See the previous message VSD LOW PHASE A MOTOR BASEPLATE TEMPERATURE VSD NOT RUNNING The control center determines this fault when...

Страница 100: ...termined by Line Voltage Setpoint within 12 seconds after the pre charge signal has been commanded See the following table Line voltage Minimum threshold V 380 415 414 460 500 If this condition is not...

Страница 101: ...psig for shells with 235 psig DWP and 295 psig for shells with 350 psig DWP The control determines the shell DWP by the condenser model number on the Sales Order Screen The chiller can be started aft...

Страница 102: ...ted by the Evaporator Transducer has decreased to the shutdown threshold and caused cycling shutdown three times in a 90 minute period For water cooling applications the shutdown threshold is a fixed...

Страница 103: ...tection motorized isolation valves Open output is energized 40 seconds but the feedback from the valve limit switch does not indicate it opened for 3 continuous seconds This cycling fault is released...

Страница 104: ...d and the Clear Faults button is pressed on the OptiView panel MBC HIGH INPUT VOLTAGE The main DC supply voltage to the MBC exceeded 165 VDC 150 10 MBC NO LEVITATION This Safety Shutdown is set when O...

Страница 105: ...difference in displacements no longer exceeds 700 m 700 micron The chiller can be started when the condition is released and the Clear Faults button is pressed on the OptiView panel MBC SPEED SIGNAL...

Страница 106: ...ty shutdown is set when the Compressor Model field entered on the Setpoints Setup Sales Order screen does not conform to the format expected The format is defined below and the data can be found on th...

Страница 107: ...tage Threshold 0 1 V Note The thresholds for set and release are intended to be different VGD ACTUATOR FAULT The VGD actuator fault digital input has lost voltage either by wiring issue or fault indic...

Страница 108: ...VSD HIGH PHASE A MOTOR BASEPLATE TEMPERATURE The motor inverter IGBT module temperatures are continuously monitored by the gate driver board where the highest temperature for each phase is displayed D...

Страница 109: ...ALANCE Each phase of motor current is compared against the average of the three phases of motor current to determine the current imbalance value If the current imbalance value is greater than 32 A for...

Страница 110: ...r pre charge to start The drive s cooling fan s and water pump s remain energized during this time The drive allows up to three consecutive pre charge related faults to occur After the third consecuti...

Страница 111: ...drive motor The Harmonic filter is standard on all models Modular lighter weight power units that can be repaired in the field without complete replacement Ease of maintenance and setup Enhanced prot...

Страница 112: ...or mounting the power module assemblies to the bus capacitor within the power unit The power unit contains components needed for the output of the OSCD in a highly integrated and modular design On top...

Страница 113: ...uire power to display Reapplying power to the chiller resets the flip dot to black and the reason the circuit breaker opened is lost The following figures show the black flip dot and the red flip dot...

Страница 114: ...s now precharged and ready to run The DC to AC inverter also uses several power devices Each phase has one or more modules arranged in a parallel connection depending on the amount of output current r...

Страница 115: ...the input current waveform to a near sine wave shape by controlling how the rectifiers are turned on and off The Harmonic Filter of the past injected harmonic current into the input of the OSCD to cor...

Страница 116: ...side of drive cabinet Callout Component Callout Component A Ground lugs B Cooling fans C Panel heater D Input fuses E Voltage transient board F Circuit breaker G Line voltage isolation board YVAM Cont...

Страница 117: ...Callout Component Callout Component A Power unit Includes three phases for the rectifier and inverter B Smart sensors C Drive logic board D Output inductor E Output capacitor assembly F Service hole G...

Страница 118: ...Figure 47 Drive logic board Callout Component Callout Component A U35 B U38 C U37 D U36 YVAM Control Center 118...

Страница 119: ...Figure 48 Rectifier side of the power unit Callout Component Callout Component A Smart sensor power supply B Smart sensor board C Phase A D Phase B E Phase C 119 YVAM Control Center...

Страница 120: ...charge contactor closes and slowly charges the DC Bus capacitors through the pre charge resistors This is called the pre charge period which lasts for 12 seconds When the 12 second time period expire...

Страница 121: ...s needed 1 X Check and tighten all electrical connections X Verify the Variable Speed Drive heat exchanger coolant level and add coolant if necessary X Measure the motor winding and insulation resista...

Страница 122: ...edures as a guide for maintenance Weekly 1 Check the OptiView Control Center displays 2 Check the entering and leaving chilled liquid temperatures and evaporator pressure for comparison with the job d...

Страница 123: ...tible leak detector to ensure that all joints are tight The acceptable limit for a 100 pure R 134a system is 0 1 oz year at DWP If any leaks are indicated they must be repaired immediately At times le...

Страница 124: ...Callout Component Callout Component A Condenser vapor service valves B Evaporator vapor service valve C Liquid drain service valve D Condenser drain isolation valve E Evaporator liquid service valve F...

Страница 125: ...e system in a vacuum slowly charge nitrogen vapor only into the system 4 Slowly build up the system pressure with dry nitrogen to the design working pressure DWP as found on the chiller vessel data pl...

Страница 126: ...at has a resolution of 2 psi increments with a dial face at 3 in in diameter or greater 2 Before proceeding make sure that the unit is at the initial evacuation level of 5 mmHg Important To prevent fr...

Страница 127: ...gas This is dependent on the gas that is selected Important Use a suitable gas detection device that can detect the trace gas that is selected Set the gas detection limit for 10 R 134a based trace gas...

Страница 128: ...ng it is necessary to obtain a sufficiently dry system The following instructions have been assembled to provide an effective method for evacuating and dehydrating a system in the field Although there...

Страница 129: ...40 29 720 in 0 0990 5 00 5 000 35 29 842 in 0 0390 2 00 2 000 15 29 882 in 0 0190 1 00 1 000 1 29 901 in 0 0100 0 50 500 11 29 917 in 0 0020 0 10 100 38 29 919 in 0 0010 0 05 50 50 29 9206 in 0 0002...

Страница 130: ...cy of the vacuum pump the room temperature and the quantity of water present in the system You can use an external heat source to shorten the dehydration time as discussed in the previous paragraph If...

Страница 131: ...Note the time and pressure 5 Hold the vacuum obtained in Step 4 in the system for 8 hours Even a slight rise in pressure can indicate a leak the presence of moisture or both It is important to check...

Страница 132: ...ithin the limits defined in Step 7 you must find and repair the leak For cases where leaks cannot be identified while pressurized but vacuum hold tests indicate that there is a leak in most cases this...

Страница 133: ...26 54 179 9 82 2 120 0 8 27 98 0 36 7 255 0 17 58 147 7 64 3 390 0 26 89 180 9 82 7 125 0 8 62 100 4 38 0 260 0 17 93 149 2 65 1 395 0 27 23 182 0 83 3 130 0 8 96 102 7 39 3 265 0 18 27 150 6 65 9 400...

Страница 134: ...ling refrigerant into or out of any chiller every precaution must be taken to prevent air from entering the system when handling the charging lines Create a suitable charging connection from new coppe...

Страница 135: ...hey are not seen on the FOF they can be provided upon request from the chillers sales engineer from the chiller rating program These depend on tube selection chilled fluid type operating head and oper...

Страница 136: ...Corrosion or rusting Slime and algae formation As a result to ensure a longer and more economical life of the equipment it is beneficial for the user to provide for correct water treatment To determi...

Страница 137: ...brush cleaning and acid cleaning Brush cleaning of tubes If the tube consists of dirt and sludge it can usually be removed using a brushing process Drain the water sides of the evaporator circuit remo...

Страница 138: ...water blow out the tubes with nitrogen or dry air 4 As soon as the tubes are clear insert a cork into each end of the tube 5 Pressurize the dry system with 50 psig to 100 psig 345 kPa to 690 kPa of n...

Страница 139: ...rt number P N Description 013 04185 000 Cleaner Coil 4 1 gal 013 04185 001 Cleaner Coil 1 gal 013 04186 000 Reducer Salt 4 1 gal 013 04186 001 Reducer Salt 1 gal Cleaning Standard and Environment Guar...

Страница 140: ...olution repeat the water rinse 5 Apply a salt reducer solution approved by Johnson Controls Details of solutions approved for use are documented in product manuals 6 To remove the salt reducer solutio...

Страница 141: ...rator shell heaters EVH1 and EVH2 are powered by the auxiliary power panel enclosure 1 Unplug the ambient temperature sensor to the OptiView by removing the J10 plug from the microboard to energize he...

Страница 142: ...ing either wire at the thermal switch as shown in Figure 54 The nominal current is 2 5 A However it might read lower values based on the load at the time of testing 2 Use an electronics safe freeze sp...

Страница 143: ...read lower values based on the load at the time of testing 2 Adjust the temperature high enough to energize the heater based on the ambient temperature at commissioning 3 When testing is complete rese...

Страница 144: ...zed the control panel cooler operates the onboard cooling fans regardless of the operating status of the cooler To test that the cooler operates correctly you can adjust the control panel cooler therm...

Страница 145: ...ttery voltage while under a known load This ensures that the battery has enough capacity left to withstand a power failure event The test is available though operator access level or higher 1 At the k...

Страница 146: ...voltage has returned If the 10 minute power loss holdup timer runs out OptiView power will be lost due to turning off UPS Inverter before the test completes and power is restored the test is considere...

Страница 147: ...ermanently connected to the Control Center or connected as required to produce a report If permanently connected a DATA LOGGING feature can produce a status report automatically beginning at an Operat...

Страница 148: ...er receive buffer is full This causes the Control Center to momentarily terminate data transmission until the printer can accept more data The busy signal polarity must be asserted low when busy OKI D...

Страница 149: ...the printer ribbon into the printer 6 Connect the printer cable to the printer and the microboard 7 Connect the printer power cable to the printer and plug into a 100 to 240VAC power source Brecknell...

Страница 150: ...Using the Printer Screen set the printer type to Weigh Tronix Automatic data logging Access level required Operator If automatic data logging is required a status report can be automatically printed a...

Страница 151: ...lect HyperTerminal f In the box displayed it requires a name and icon for the connection Select a name that is descriptive and select an icon Select OK g In the box labeled Connect select the com port...

Страница 152: ...Ready Pin 22 Ring Indicator The connector on the PC has male pins As a result the mating cable needs to terminate DB9 F female pin connector Table 102 RS 232 pin assignments DB9 PC signal set for mos...

Страница 153: ...A serial cable to go from the OptiView Control Panel to the serial port is available from the parts center P N 375 90490 231 Figure 61 OptiView panel to PC serial cable 153 YVAM Control Center...

Страница 154: ...Figure 62 Sample printout status or history YVAM Control Center 154...

Страница 155: ...Figure 63 Sample printout status or history continued 155 YVAM Control Center...

Страница 156: ...Figure 64 Sample printout setpoints YVAM Control Center 156...

Страница 157: ...Figure 65 Sample printout setpoints continued 157 YVAM Control Center...

Страница 158: ...Figure 66 Sample printout schedule YVAM Control Center 158...

Страница 159: ...Figure 67 Sample printout sales order 159 YVAM Control Center...

Страница 160: ...Figure 68 Sample printout security log report YVAM Control Center 160...

Страница 161: ...Figure 69 Sample printout trend data new or existing points Figure 70 Sample printout custom screen report 161 YVAM Control Center...

Страница 162: ...ters mm Weight Pounds lb 0 4536 Kilograms kg Velocity Feet second fps 0 3048 Meters second m s Feet of water ft 2 989 Kilopascals kPa Pressure drop Pounds square inch psi 6 895 Kilopascals kPa Tempera...

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Johnson Controls YORK YVAM 0350, Руководство по эксплуатации и техническому обслуживанию

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