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www.DaikinApplied.com 17 

IOM 1210-1 • MAGNITUDE

®

 MODEL WMC CHILLERS

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Summary of Contents for WMC

Page 1: ...ion and Maintenance Manual Magnitude Magnetic Bearing Centrifugal Chillers Model WMC C Vintage 125 to 400 Tons 440 to 1400 kW HFC 134a Refrigerant 50 60 Hz IOM 1210 1 Group Chiller Part Number IOM1210...

Page 2: ...peration 20 Operator Responsibilities 20 Operator Schools 20 Sequence of Unit Operation 20 Unit Enabling Disabling 20 Operator Interface Touch Screen OITS 21 The Controller 48 Building Automation Syst...

Page 3: ...Code and local codes See Note 4 Condenser pump starting relay CP1 2 installed and wired See Note 3 Miscellaneous Yes No N A Initials Oil cooled water piping complete Units with water cooled oil cooler...

Page 4: ......

Page 5: ...rvice work Never unplug any cables circuit board terminal blocks or power plugs while power is applied to the panel NOTICE This equipment generates uses and can radiate radio frequency energy If not i...

Page 6: ...lation and increasing reliability Necessary equipment protection and operating controls are included All Daikin Applied centrifugal chillers must be commissioned by a factory trained Daikin Applied se...

Page 7: ...icroTech II unit controller is to acquire and process data relating to chiller operation issue instructions to various components of the chiller and maintain controlled operation of the chiller As a p...

Page 8: ...t also be capable of supporting 1 5 times the shipping weight of the unit If a knockdown option was ordered on the unit reference the Knockdown Installation Manual for more information Nameplates Ther...

Page 9: ...mm Width in mm Height in mm Shipping Weight lb kg WMC125S E2209 C2009 134 3 3411 43 5 1105 81 0 2057 5086 2307 WMC145S E2209 C2009 134 3 3411 43 5 1105 81 0 2057 5586 2534 WMC145D E2209 C2009 134 3 34...

Page 10: ...f welding is performed on a vessel shell or tube sheet The water heads can be interchanged end for end so that the water connections can be made at either end of the unit If this is done use new head...

Page 11: ...Operation Another condenser control method is to use a modulating two way control valve located on the outlet connection of the condenser The valve will be nearly closed at startup to restrict water...

Page 12: ...connectors Remove plastic shipping plugs if installed from the inside of the valves prior to making pipe connections Whenever vent piping is installed the lines must be in accordance with local code r...

Page 13: ...nd licensed electricians must perform wiring An electrical shock hazard exists that can cause severe injury or death The field power wiring required varies depending on unit model See Figure 12 Wiring...

Page 14: ...IOM 1210 1 MAGNITUDE MODEL WMC CHILLERS 12 www DaikinApplied com Installation Figure 12 Wiring Index...

Page 15: ...www DaikinApplied com 13 IOM 1210 1 MAGNITUDE MODEL WMC CHILLERS Installation...

Page 16: ...IOM 1210 1 MAGNITUDE MODEL WMC CHILLERS 14 www DaikinApplied com Installation Figure 13 Controller Box Wiring...

Page 17: ...MPERS WJ1 AND WJ2 MUST ONLY BE CONNECTED TO TERMINAL BLOCK 33 CHILLER FACTORY ASSEMBLY IF OPTIONAL GFP1 IS USED THEN REMOVE JUMPER WJ1 OTHERWISE COMPLETE CONNECTION WJ1 TO TERMINAL BOLOCK 38 IF OPTION...

Page 18: ...IOM 1210 1 MAGNITUDE MODEL WMC CHILLERS 16 www DaikinApplied com Installation Figure 14 Power Box Single and Multi Point Wiring...

Page 19: ...www DaikinApplied com 17 IOM 1210 1 MAGNITUDE MODEL WMC CHILLERS Installation...

Page 20: ...other or to B or C vintage chillers consult a Daikin Applied service representative WMC chillers cannot be pLAN interconnected with WSC WDC WCC or WME centrifugal chillers Long Term Storage This infor...

Page 21: ...trols wired Wiring complies with National Electrical Code and local codes See Note 4 Condenser pump starting relay CP1 2 installed and wired See Note 3 Miscellaneous Yes No N A Initials Oil cooled wat...

Page 22: ...ion and impeller speed Maximum capacity at a given operating condition can be found either when the compressors have reached their maximum speed limit Mechanical limitation or when the compressors hav...

Page 23: ...n a similar manner as the Unit Switch If the Control Source on the OITS MODES Setpoint Screen is set to Local press the STOP button on the OITS to disable the chiller This method of disabling will cau...

Page 24: ...tails For more information on alarms see page 42 through page 47 II Information Chilled water setpoint ACTIVE LWT SETPOINT Entering and leaving evaporator water temperatures Entering and leaving conde...

Page 25: ...creen Figure 49 on page 41 and the Alarm History Screen Figure 50 on page 42 VIEW button Shows details about the unit status and conditions Pressing this button will toggle between the Home View Scree...

Page 26: ...Use the COMP button to toggle between the two compressors data Many of the inputs and outputs shown in the Compressor Inputs Outputs Information will also appear under the Compressor State Information...

Page 27: ...O Unit I O EVAP or COND buttons will display the same information as what is available from the Detail View Screen Reference the Information figures in the Detail View Screen section starting on page...

Page 28: ...will toggle to the Service Screen shown in Figure 47 on page 40 A typical Setpoint Screen is displayed in Figure 26 below Figure 26 A Typical Setpoint Screen Figure 26 shows the WATER Setpoint Screen...

Page 29: ...urn green 7 Setpoints with numeric values can be changed in two ways Select the desired value by pressing the numbered buttons on the Numeric Keypad Press ENTER to enter the value or CANCEL to cancel...

Page 30: ...interlock confirmation from compressor Stop Start Timer 3 3 min 3 to 20 min M Time from when compressor stops to when it can restart Start Start Timer 2 40 min 15 to 60 min M Time from when compresso...

Page 31: ...P7 at start Surge Temperature Limit 7 50 F 2 to 45 F T At start Surge Temp ST is compared to this SP Alarm at ST 2x SP High Discharge Temp Stop 6 190 F 120 to 240 F T Max discharge temp to shut down c...

Page 32: ...Minimum Start Position 8 10 0 to 100 T Initial position of valve when condenser EWT is at or below Setpoint 9 Stage Down 7 20 0 to 100 T Valve position below which the fans can stage down Tower Setpo...

Page 33: ...8 70 F 40 to 120 F M Temperature for fan stage 1 on Stage Differential Lift 7 6 0 psi 1 0 to 20 0 psi M Fan staging deadband with Setpoint 1 Lift Stage Differential Temp 6 3 0 F 1 0 to 10 0 F M Fan st...

Page 34: ...ature vs Fan Stages II VALVE SP This control strategy is tower staging up to four stages with a low limit controlled bypass valve The tower fans are controlled as in I plus a tower bypass valve is con...

Page 35: ...r fan control with a VFD and bypass valve control See Figure 40 and Figure 41 Figure 40 TOWER Setpoint SP2 V VALVE SP VFD STAGE Figure 41 V VALVE SP VFD STAGE Percent vs Temperature As shown in Figure...

Page 36: ...Daikin Applied startup technician Setup instructions for each of the five tower control strategies are provided next I NONE Tower Fan Staging Only This is the default setting but it is NOT a recommend...

Page 37: ...dealing with system fluid mass component size and other factors affecting the reaction of the system to control inputs To avoid possible equipment damage these setpoints should be set by personnel ex...

Page 38: ...itial load point RLA set in SP 5 to 100 RLA Initial Soft Load Limit 6 40 10 to 100 M Initial amps as of RLA Uses SP4 6 Soft Load Enable 5 OFF OFF ON M Soft load on or off Uses SP6 7 Nameplate RLA 4 De...

Page 39: ...ps setpoint over the amount of time specified by the Soft Load Ramp setpoint If the amp draw rises above the currently active soft load limit value the unit will inhibit capacity increases If the amp...

Page 40: ...one compressor on each unit Pump starts all compressors on one chiller first Standby uses this compressor only if another fails Maximum Compressors ON 10 1 1 8 M Total number of compressors allowed to...

Page 41: ...Reset Delta T 8 10 0 F 0 0 to 20 0 F M Sets the evap delta T above which Return reset begins LWT Reset Type 7 NONE NONE RETURN 4 20mA M Select reset type NONE for none RETURN for resetting chilled wa...

Page 42: ...creen Figure 47 is accessed by pressing the SET button from any SET screen In other words it is the second SET screen While containing information and activity buttons for the service technician it al...

Page 43: ...e HISTORY button at the bottom of any screen that contains this button The HISTORY button will toggle between the Trend History Screen and the Alarm History Screen discussed next Figure 49 Trend Histo...

Page 44: ...via USB In order to download the trend or alarm history first insert a USB drive into the left side of the OITS PC see Figure 3 on page 5 if help is needed to identify the OITS PC The OITS PC will ha...

Page 45: ...history files are saved from the OITS PC as csv files These files can be opened on a normal PC and manipulated using Microsoft Excel for personal use If tech support is requested the original un mani...

Page 46: ...1 COMPR STOP Motor Current Low Auto clears Low Motor Current Comp 2 COMPR STOP Motor Current Low Auto clears No Condenser Water Flow COMPR STOP Condenser Water Flow Loss Auto clears No Compressor Stop...

Page 47: ...f Tripped 3x in 50 min High Discharge Temperature Circuit 1 COMPR STOP Discharge Temperature High Auto clears Locked off if Tripped 3x in 50 min High Discharge Temperature Circuit 2 COMPR STOP Dischar...

Page 48: ...Warning Alarms Description OITS Alarm Message Alarm Reset Entering Condenser Water Temperature Sensor Fault NO ACTION Condenser EWT Out of Range Auto clears Entering Evaporator Water Temperature Senso...

Page 49: ...rt shown on OITS panel No Alarm Re Start Fault No Alert shown on OITS panel No Alarm Re Start Fault Circuit 1 No Alert shown on OITS panel No Alarm Re Start Fault Circuit 2 No Alert shown on OITS pane...

Page 50: ...have sub screens located under them There are two ways to navigate the menu matrix Hierarchical and Scrolled Menu Structure Hierarchical The hierarchical menu structure allows the operator to use shor...

Page 51: ...the screens are arranged logically in a matrix as shown in Table 19 on page 50 In the scroll mode there will be a blinking cursor located at the top left of the screen The controller holds memory duri...

Page 52: ...0 000 0 SatCond 000 0 000 0 VIEW COMP 2 6 psi F SatEvap 000 0 000 0 SatCond 000 0 000 0 VIEW COMP 7 Hours 00000 x10 Starts 00000 VIEW COMP 2 7 Hours 00000 x10 Starts 00000 VIEWCOMP 8 HWLok Interlock...

Page 53: ...ne Valve Type NC I I v SET UNIT SPs 5 Rest Type NONE MaxResetDT 00 0 F StrtResetDT 10 0 F SET COMP SPs 5 Lead Staging 030 Nom Capacity 0100T HG Bypass 30 RLA SET COMP 2 SPs 5 Nom Capacity 0100T HG Byp...

Page 54: ...ethods will cause the following screen to be displayed The gray background indicates where the blinking cursor will be The second row will say either Enter Operator Enter Manager or Enter Technician d...

Page 55: ...bling see Unit Enabling Disabling on page 20 Clearing Alarms If the LEFT arrow key on the controller turns red it is an indication that there is an alarm Alarms can be cleared from the unit controller...

Page 56: ...he range of the input NOT the operating range of the chiller Table 21 Controller Digital Inputs Description Signal Signal 1 Unit OFF Switch 0 VAC Stop 24 VAC Auto 2 Remote Off Enable 0 VAC Stop 24 VAC...

Page 57: ...the password that must be active in order to change the setpoint The letters in the Password column refer to the following O Operator the password number for operator level is 100 M Manager the passw...

Page 58: ...Time 5 min 1 to 60 min T Stage Differential Temp 3 0 F 1 0 to 10 0 F T Stage Differential Lift 6 0 psi 1 0 to 20 0 psi T Stage 1 On Temp 70 F 40 to 120 F T Stage 2 On Temp 75 F 40 to 120 F T Stage 3...

Page 59: ...0 psi 0 to 20 0 psi T Tower Reset Lift 5 0 F 0 to 10 0 F T Sensor Selection ECWT B3 ECWT B3 provided or EHRT B9 not provided T Alarms Evaporator Freeze 34 0 F 9 0 to 45 0 F T Condenser Freeze 34 0 F 9...

Page 60: ...hey may be required to run with on site electrical generators This is particularly true when the generators are used for temporary power when the utility power is lost Generator Sizing Gas and diesel...

Page 61: ...standard waterboxes follows only qualified service personnel should perform these tasks After draining water remove all but two head bolts at roughly 10 and 2 o clock Loosen the remaining two bolts to...

Page 62: ...D Perform MicroTech II check log and last fault analysis X III Condenser A Confirm correct water flow and pressure drop O X B Confirm appropriate water treatment O C Clean and Leak Test condenser tube...

Page 63: ...revious value over a rolling one minute interval Error In the context of this manual Error is the difference between the actual value of a variable and the target setting or setpoint Evaporator Conden...

Page 64: ...er s run status is continuously stored in battery backed RAM When power is returned to the compressors it checks the status of this function and if enabled it then checks if the chiller was running wh...

Page 65: ...uction superheat is calculated for each circuit using the following equation Suction Superheat Suction Temperature Evaporator Saturated Temperature VDC Volts Direct Current sometimes noted as vdc VFD...

Page 66: ...0 94 112 0 134 210 5 16 15 7 56 52 4 96 115 9 136 216 6 18 17 1 58 54 9 98 120 0 138 222 8 20 18 4 60 57 4 100 124 1 140 229 2 22 19 9 62 60 0 102 128 4 142 235 6 24 21 3 64 62 7 104 132 7 144 242 2 2...

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Page 68: ...s sold pursuant to its standard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied representative for warranty details To find your local Daikin Applied...

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