Trane CVHE-SVU01E-ENX39640712050 - Manuals

CVHE-SVU01E-EN 6 GeneralInformation Commonly Used Acronyms For convenience, a number ofacronyms are used throughout thismanual. These acronyms are listedalphabetically below, along with the“translation” of each: AFD = Adaptive Frequency Drive ASME = American Society ofMechanical Engineers ASHRAE = A...

7 CVHE-SVU01E-EN GeneralInformation Figure 1. General CVHE and CVHG unit components Overview CVHE, CVHG, CVHF Each CVHE, CVHG, or CVHF unit iscomposed of 5 basic components. — the evaporator,— 3-stage compressor on CVHE, CVHG or 2 stage compressor onCVHF, — 2-stage economizer on CVHE, CVHG, or singl...

CVHE-SVU01E-EN 8 GeneralInformation Figure 1. General CVHE and CVHG unit components - continued

CVHE-SVU01E-EN 10 GeneralInformation Cooling Cycle CVHE, CVHG, CVHF When in the cooling mode, liquidrefrigerant is distributed along thelength of the evaporator and sprayedthrough small holes in a distributor(i.e., running the entire length of theshell) to uniformly coat eachevaporator tube. Here, t...

11 CVHE-SVU01E-EN Figure 3. CVHE, CVHG pressure enthalpy curve Figure 4. CVHE, CVHG 2-stage economizer GeneralInformation

13 CVHE-SVU01E-EN Overview Controls Operator Interface Information is tailored to operators,service technicians and owners When operating a chiller, there isspecific information you need on aday-to-day basis — setpoints, limits,diagnostic information, and reports. When servicing a chiller, you needd...

CVHE-SVU01E-EN 16 GeneralInformation Oil and Refrigeration Pump Compressor Lubrication System - A schematic diagram of thecompressor lubrication system isillustrated in Figure 12. Oil is pumped from the oil tank (by apump and motor located within thetank) through an oil pressure-regulating valve des...

17 CVHE-SVU01E-EN GeneralInformation Figure 12. Oil refrigerant pump

CVHE-SVU01E-EN 18 GeneralInformation Base Loading ControlAlgorithm: This feature allows an externalcontroller to directly modulate thecapacity of the chiller. It is typicallyused in applications where virtuallyinfinite sources of evaporator loadand condenser capacity are availableand it is desirable...

CVHE-SVU01E-EN 20 GeneralInformation Ice Machine Control The control panel provides a servicelevel “Enable or Disable” menu entryfor the Ice Building feature when theIce Building option is installed. IceBuilding can be entered 1) from the“Front Panel”, 2) if hardware isspecified, will accept either ...

21 CVHE-SVU01E-EN GeneralInformation Free Cooling Cycle Based on the principle that refrigerantmigrates to the coldest area in thesystem, the free cooling optionadapts the basic chiller to function asa simple heat exchanger. However, itdoes not provide control of theleaving chilled water temperature...

CVHE-SVU01E-EN 22 GeneralInformation it is then compressed anddischarged to the condenser. Most ofthe condensed refrigerant initiallyfollows the path of least resistance byflowing into the storage tank. Thistank is vented to the economizersump through a small bleed line;when the storage tank is full...

23 CVHE-SVU01E-EN GeneralInformation Hot Gas Bypass The hot gas bypass (HGBP) controloption is designed to minimizemachine cycling by allowing thechiller to operate stably underminimum load conditions. In thesesituations, the inlet guide vanes are“locked” at a preset minimumposition, and unit capaci...

CVHE-SVU01E-EN 24 GeneralInformation Hot Water control Occasionally CTV chillers areselected to provide heating as aprimary mission. With hot watertemperature control, the chiller canbe used as a heating source orcooling source. This feature providesgreater application flexibility. In thiscase the o...

25 CVHE-SVU01E-EN GeneralInformation Heat Recovery Cycle ‘‘Heat recovery’’ is designed tosalvage the heat that is normallyrejected to the atmosphere throughthe cooling tower, and put it tobeneficial use. For example, a high-rise office building may requiresimultaneous heating and coolingduring the w...

CVHE-SVU01E-EN 26 Unit ControlPanel (UCP) Control Panel Devices and UnitMounted Devices Unit Control Panel (UCP) Safety and operating controls arehoused in the unit control panel, thestarter panel and the purge controlpanel. The UCP ‘s operator interfaceand main processor is called theDynaView ™ (DV...

27 CVHE-SVU01E-EN Unit ControlPanel (UCP) Tracer CH530 Chiller Controller Revolutionary control of the chiller,chilled water system, and your entirebuilding with unprecedentedaccuracy, reliability, efficiency, andsupport for maintenance using thechiller’s PC-based service tool.Chiller reliability is...

CVHE-SVU01E-EN 28 OperatorInterface Figure 17. DynaView ™ main processor The DynaView ™ (DV) Operator Interface contains the “MainProcessor (MP)” and is mounted onthe unit control panel front doorwhere it communicates commandsto other modules, collecting data,status and diagnostic informationfrom th...

35 CVHE-SVU01E-EN OperatorInterface Diagnostic Screen The diagnostic screen is accessible by touching the Alarms enunciator. When an alarm is present, the alarmenunciator is present next to the Stopkey. A flashing “alarm” indicates amachine shutdown and a nonflashing “alarm” indicates aninformationa...

37 CVHE-SVU01E-EN OperatorInterface The left column text “Front Panel”,“BAS”, “External”, and “ActiveCurrent Limit Setpoint” will alwaysbe present regardless of installationor enabling those optional items. Inthe second column “- - - -” will beshown if that option is Not Installed,otherwise the curr...

41 CVHE-SVU01E-EN OperatorInterface Setting Tab screens provides a user the ability to adjust settings justifiedto support daily tasks. The layoutprovides a list of sub-menus,organized by typical subsystem. Settings screen for standard CTV : Chilled Water Setpoint: To change chilled water setpoint f...

43 CVHE-SVU01E-EN OperatorInterface Display SettingsDescription Units notes 1. Date Format (“mmm dd, yyy”, “dd-mmm-yyyy”), “mmm dd, yyy” 2. Date 4 3. Time Format (12-hour, 24-hour), 12-hour 4. Time of Day 4 5. Keypad and Display Lockout (Enable, Disable), Disable 5 6. Display Units (SI, English), En...

CVHE-SVU01E-EN 44 OperatorInterface Each Settings Sub screen consists of a setpoints list and the current value.The operator selects a setpoint to change by touching either the description orsetpoint value. Doing this causes the screen to switch to the Analog SettingsSubscreen shown below. Analog Se...

CVHE-SVU01E-EN 48 OperatorInterface The DynaView ™ Display Touch Screen Lock screen is shown below. This screen is used if the Display and Touch Screen Lock feature is Enabled. 30minutes after the last key stroke this screen will be displayed and the Displayand Touch Screen will be locked out until ...

49 CVHE-SVU01E-EN InterprocessorCommunication Inter ProcessorCommunications IPC3 When using Tracer CH530, you willnot be required to know all thedetails about the structure of the IPC3bus. However this page givesdetailed information about thesystem for those of you that are reallyinterested in how i...

CVHE-SVU01E-EN 52 Control SystemComponents Control Panel DevicesStandard Devices Controls Field Connection Description Package Purpose Point Terminals 1A1 Power Supply Standard #1 Converts 24 vac to 24 vdc not for field use 1A2 Power Supply (as required) #2 Converts 24 vac to 24 vdc not for field us...

CVHE-SVU01E-EN 54 Control SystemComponents EXOP Extended Operation OptionThe following modules (1A17, 1A18, and 1A19) are provide when this control package is specified. 1A5 Quad Relay EXOP Relay #4 Ice Building Relay J2-10 NO, J2-11 NC, Output modules* J2-12 common 1A17 Optional Dual Analog EXOP Si...

CVHE-SVU01E-EN 56 Control SystemComponents CDRP Refrigerant PressureOutput Option 1A15: Refrigerant Pressure Output can beconfigured at commissioning tocorrespond to either A) the absolutecondenser pressure, or B) thedifferential pressure of the evaporatorto condenser pressures. This vdc output is l...

57 CVHE-SVU01E-EN Control SystemComponents B) Refrigerant Differential PressureIndication Output: A 2 to 10 VDC analog output isprovided instead of the previouscondenser pressure output signal.This signal corresponds to apredetermined minimum andmaximum pressure settings setup atcommissioning of thi...

59 CVHE-SVU01E-EN Control SystemComponents External Chilled WaterSetpoint (ECWS) The External Chilled Water Setpointallows the chilled water setpoint tobe changed from a remote location.The External Chilled Water Setpointis found on 1A16 J2-5 to J2-6(Ground). 2-10 vdc and 4-20 macorrespond to a 34°F...

CVHE-SVU01E-EN 60 Control SystemComponents 1A8, 1A9, 1A11, 1A12 Quad RelayOutput Status: Relay #1 J2-1 NO, J2-2 NC, J2-common Relay #2 J2-4 NO, J2-5 NC, J2-6common Relay #3 J2-7 NO, J2-8 NC, J2-9common Relay #4 J2-10 NO, J2-11 NC, J2-12common Relay Outputs: at 120 VAC: 7.2 Ampsresistive, 2.88 Amps p...

61 CVHE-SVU01E-EN Control SystemComponents 1A15, 1A16, 1A17, 1A21 Dual AnalogInput/output Module;Analog Output: The Analog Output is a voltage only signal. 2-10 Vdc at22mA J2: 14 - 26 AWG with a maximum oftwo 14 AWG J2-1 Output #1 to J2-3 (Ground), J2-4Output #2 to J2-6 (Ground). UCP provides a 2-10...

CVHE-SVU01E-EN 62 Control SystemComponents Unit mounted devices Vane Actuator Control The Stepper Module within thestepper vane actuator (4M2) (and 4M4extended capacity) pulses a DCvoltage to the windings of theStepper Motor Actuator(s) to controlinlet guide vane position. Whileoperation of this ste...

63 CVHE-SVU01E-EN Electrical Sequence This section will acquaint theoperator with the control logicgoverning CVHE, CVHF and CVHGchillers equipped with Tracer CH530UCP based control systems. Whenreviewing the step-by-step electricalsequences of operation, refer to thetypical wiring schematics for Uni...

CVHE-SVU01E-EN 66 Interval Minimum Maximum Units Actual Design A. (Test for transition completeinput open) 160 to 240 milliseconds B. (Just delay time) 20 milliseconds C. (Close 1M (2K1) Contactor and testfor no current.) (Starter integrity test) 500 milliseconds D. (Hold 1M (2K1) Contactor and test...

CVHE-SVU01E-EN 68 Momentary Power Loss (MPL)Protection. Improved power measurement andprotection algorithms allow the unitto accommodate more poweranomalies than ever. If the chillermust shut down, faster restarts getthe machine up and running as soonas possible. Momentary power loss (MPL) detectsth...

69 CVHE-SVU01E-EN Current Overload Protection Motor currents are continuouslymonitored for over current protectionand locked rotor protection. Thisprotects the Chiller itself fromdamage due to current overloadduring starting and running modesbut is allowed to reach full loadamps. This overload prote...

CVHE-SVU01E-EN 70 Current Limit Protection Current Limit Protections exist toavoid motor current overload anddamage to the compressor motorduring starting and running.Compressor motor current iscontinuously monitored and currentis controlled via a limit function thatto prevent running into over curr...

71 CVHE-SVU01E-EN Differential to Start or Stop The Differential to Start setpoint isadjustable from 1 to 10°F (0.55 to5.55°C) and the Differential to Stopsetpoint adjustable from 1 to 10°F(0.55 to 5.55°C). Both setpoints arewith respect to the Active ChilledWater Setpoint. When the chiller isrunnin...

CVHE-SVU01E-EN 72 Evaporator Limit Evaporator refrigerant temperature iscontinuously monitored to provide alimit function that prevents lowrefrigerant temperature trips whichallows the chiller to continue to runat a reduced load instead of trippingoff at the Low Evaporator RefrigerantTemperature Cut...

73 CVHE-SVU01E-EN Low Refrigerant TemperatureCutout The purpose of the low evaporatorrefrigerant temperature protection isto prevent water in the evaporatorfrom freezing. When the LowEvaporator Refrigerant TemperatureCutout (LRTC) trip point is violated, alatching diagnostic indicating thecondition ...

CVHE-SVU01E-EN 74 Figure 27. Cutout strategy Machine Protectionand AdaptiveControl Limit Loading: The potential to limit loading increases as the saturatedevaporator temperature approaches the evaporator limit setpoint. Unload: The potential to unload increases as the saturated evaporatortemperature...

75 CVHE-SVU01E-EN Condenser Limit Condenser pressure is continuouslymonitored to provide a limit functionthat prevents High Pressure Cutout(HPC) trips. This protection is calledCondenser Refrigerant PressureLimit, or High Pressure Limit. A fullyloaded compressor, operating at highEvaporator Leaving ...

CVHE-SVU01E-EN 76 Restart Inhibit. This function provides short cycleprotection for the motor, andindirectly also short cyclingprotection for the starter since thestarter is designed to operate themotor under all the conditions ofmotor performance. The operation of the restart inhibitfunction is dep...

CVHE-SVU01E-EN 80 Table 3. Values for start reset types The values for “RESET TYPE” are:Reset Outdoor Return Const Return Type: Disable Air Reset Reset Reset The values for “RESET RATIO” for each of the reset types are:Reset Reset Increment Increment Factory Type Ratio English SI Units Default Range...

81 CVHE-SVU01E-EN Reset Ratio: The Reset Ratio is displayed as apercentage. To use it in the aboveequation it must be converted to it’sdecimal form. Reset Ratio percent /100 = ResetRatio decimal Example of converting Reset Ratio: If the Reset Ratio displayed on theCLD is 50 percent then use (50/100)...

CVHE-SVU01E-EN 82 Figure 29. Reset function for return CWR Note: This graph assumes Maximum Reset is set to 20 degrees. Figure 30. Reset function for return CWR Machine Protectionand AdaptiveControl

83 CVHE-SVU01E-EN Example of Calculating Return Reset: If:Reset Ratio = 50%Start Reset = 25TWE = 65TWL = 45Maximum Reset = 8 How many Degrees of Reset willthere be? Degrees of Reset = Reset Ratio*(StartReset - (TWE-TWL))Degrees of Reset = .5*(25-(65-45))Degrees of Reset = 2.5 If:Reset Ratio = 70%Sta...

85 CVHE-SVU01E-EN Unit Start-Up Procedures Daily Unit Start-Up 1. Verify the chilled water pump and condenser water pump starter arein “ON” or “AUTO”. 2. Verify the cooling tower is in “ON” or “AUTO”. 3. Check the oil tank oil level; the level must be visible in or abovethe lower sight glass. Also, ...

CVHE-SVU01E-EN 86 When the cooling requirement issatisfied, the UCP originates a“Shutting down” signal. The inletguide vanes are driven closed for 50seconds, and the unit enters a 3-minute post-lube period. Thecompressor motor and condenserwater pump starter are de-energizedimmediately, but the oil ...

87 CVHE-SVU01E-EN Unit Shutdown Procedures Daily Unit Shutdown Note: Refer to Start-Run Shutdown sequence in General InformationOverview Sequence of Operation. 1. Press STOP. 2. After compressor and water pumps shutdown turn PumpContactors to OFF or open pumpdisconnects. Seasonal Unit Shutdown CAUTI...

CVHE-SVU01E-EN 88 Overview This section describes the basicchiller preventive maintenanceprocedures, and recommends theintervals at which these proceduresshould be performed. Use of aperiodic maintenance program isimportant to ensure the best possibleperformance and efficiency from aCenTraVac ® chil...

89 CVHE-SVU01E-EN WARNING Hazardous Voltage w/Capacitors! Disconnect all electric power,including remote disconnects beforeservicing. Follow proper lockout/tagout procedures to ensure thepower cannot be inadvertentlyenergized. For variable frequencydrives or other energy storingcomponents provided b...

CVHE-SVU01E-EN 90 [ ] Complete all recommendedquarterly maintenance procedures. [ ] Lubricate the vane control linkagebearings, ball joints, and pivotpoints; as needed a few drops of lightmachine oil (SAE-20) is sufficient. [ ] Lubricate vane operator tango-rings as described in themaintenance secti...

91 CVHE-SVU01E-EN Oil Maintenance Compressor Oil Change onCVHE, CVHF, CVHG Recommendations are to subscribeto an annual oil analysis programrather than automatically change theoil as part of scheduled maintenance.Change the oil only if indicated bythe oil analysis. Use of an oilanalysis program will...

CVHE-SVU01E-EN 92 Oil Maintenance Replacing Oil Filter Replace oil filter: (1) annually, (2) ateach oil change, (3) or if erratic oilpressure is experienced duringchiller operation. Oil Filter Replacement Use the following procedure toservice the oil filter. Refer to Figure34. 1. Run the oil pump fo...

93 CVHE-SVU01E-EN Maintenance Other MaintenanceRequirements Compressors using new sealtechnology will not use O-rings. TheO-ring has been replaced by Loctite515 applied at a minimum filmthickness of .010 applied across thewidth of the flange. The current jackbolt holes remain for disassembly. CAUTIO...

CVHE-SVU01E-EN 94 Maintenance Figure 33. Rotary valve in drain position Front View with Refrigerant Pump DO NOT LEAVE GREASE FITTINGSINSTALLED.If grease fittings have been used forthis procedure then they MUST BEREMOVED before returning the unitto service. Grease fittings are notvacuum-tight and wil...

95 CVHE-SVU01E-EN Maintenance Refrigerant Charge WARNING Contains Refrigerant! System contains oil and refrigerantand may be under positive pressure.Recover refrigerant to relievepressure before opening the system.See unit nameplate for refrigeranttype. Do not use non-approvedrefrigerants, refrigera...

CVHE-SVU01E-EN 96 Maintenance Recovery and RecycleConnections To facilitate refrigerant removal andreplacement, newer-design CVHE,CVHF and CVHG units are providedwith a 3/4-inch vapor fitting withshutoff valve on the chiller suctionand with a 3/4-inch liquid connectionwith shutoff valve at the botto...

97 CVHE-SVU01E-EN Maintenance Condenser tube fouling is indicatedwhen the approach temperature (thedifference between the condensingrefrigerant temperature and theleaving condenser watertemperature) is higher than predicted. If the annual condenser tubeinspection indicates that the tubesare fouled, ...

CVHE-SVU01E-EN 98 Maintenance Purge System Because some sections of thechiller’s refrigeration system operateat less-than-atmospheric pressure,the possibility exists that air andmoisture may leak into the system. Ifallowed to accumulate, thesenoncondensables become trapped inthe condenser; this incr...