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Operation
Maintenance
™
Water Cooled CenTraVac
With CH530
X39640712050 CVHE-SVU01E-EN
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Warnings and Cautions death, while cautions are designed to Warnings and Cautions alert personnel to conditions that Notice that warnings and cautions could result in equipment damage. appear at appropriate intervals throughout this manual. Warnings Your personal safety and the proper are provided to alert installing operation of this machine depend contractors to potential hazards that upon the strict observance of these could result in personal injury or precautions. NOTICE: Warnings and Cauti
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Contents 2 Warnings and Cautions 4 General Information 26 Unit Control Panel (UCP) 28 Operator Interface 41 Chilled Water Setpoint 49 Inter Processor Communication (IPC) 50 Control System Components 63 Controls Sequence of Operation 68 Machine Protection and Adaptive Control 85 Unit Startup 87 Unit Shutdown 88 Periodic Maintenance 91 Oil Maintenance 93 Maintenance 100 Forms CVHE-SVU01E-EN 3
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General Information 3. Product Coding Block Unit Nameplate Literature change The CVHE, CVHF and CVHG models Applicable to CVHE, CVHF, CVHG The unit nameplate is located on the are defined and built using the About this manual left side of the unit control panel. product definition and selection Operation and maintenance The following information is (PDS) system. This system describes information for models CVHE, CVHF provided on the unit nameplate. the product offerings in terms of a and CVHG ar
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General Information th th An example of a typical model C = (14 digit) Control Enclosure 0 = (35 digit) Unit Option number is: S = Special th 1 = (36 digit) Control: Enhanced C = Standard Control Enclosure CVHF091NAL00ACU2758W7E8TB protection th C0000000K01G14C10W1A03B1 U = (15 digit) Compressor Motor th G = (37 digit) Control: Generic BAS Power (kw) Model Number Digit Identification th 1 = (38 digit) Control: Extended th th th 275 = (16 , 17 , and 18 digit) st ® C = (1 digit) CenTraVac Hermeti
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General Information HGBP = Hot Gas Bypass Control Optional Packages Commonly Used Acronyms For convenience, a number of HVAC = Heating, Ventilating, and Air OPST Operating Status Control acronyms are used throughout this Conditioning GBAS Generic Building Automation manual. These acronyms are listed IE = Internally-Enhanced Tubes Interface alphabetically below, along with the “translation” of each: IPC = Interprocessor Communication EXOP Extended Operation AFD = Adaptive Frequency Drive LBU = La
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General Information A heat-recovery or auxiliary Overview condenser can be factory-added to CVHE, CVHG, CVHF the basic unit assembly to provide a Each CVHE, CVHG, or CVHF unit is heat-recovery cycle. composed of 5 basic components. — water-cooled condenser, — related interconnecting piping. — the evaporator, — 3-stage compressor on CVHE, CVHG or 2 stage compressor on CVHF, — 2-stage economizer on CVHE, CVHG, or single economizer on CVHF, See Figure 1 for Typical CVHE and CVHG, and Figure 2 for T
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General Information Figure 1. General CVHE and CVHG unit components - continued CVHE-SVU01E-EN 8
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General Information Figure 2. Illustrates the general component layout of a typical CVHF chiller CVHE-SVU01E-EN 9
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General Information condenser. Baffles within the Compressed gas from the first-stage Cooling Cycle condenser shell distribute the impeller is discharged through the CVHE, CVHG, CVHF compressed refrigerant gas evenly second-stage variable guide vanes When in the cooling mode, liquid and into the second-stage impeller. across the condenser tube bundle. refrigerant is distributed along the Here, the refrigerant gas is again Cooling tower water circulated length of the evaporator and sprayed throug
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General Information Figure 3. CVHE, CVHG pressure enthalpy curve Figure 4. CVHE, CVHG 2-stage economizer CVHE-SVU01E-EN 11
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General Information Figure 5. CVHF pressure enthalpy curve Figure 6. CVHF single stage economizer CVHE-SVU01E-EN 12
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General Information ™ ™ DynaView Human Interface TechView Chiller Service Tool Overview — For the operator — For the service technician or Controls Operator Interface Day-to-day operational information is advanced operator Information is tailored to operators, All chiller status, machine presented at the panel. Up to seven service technicians and owners configuration settings, customizable lines of data (English or SI units) are limits, and up to 60 active or historic When operating a chiller, t
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General Information Figure 8. CVHE, CVHF, and CVHG sequence of operation: power up to starting Figure 9. CVHE, CVHF, and CVHG sequence of operation: running CVHE-SVU01E-EN 14
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General Information Figure 10. CVHE, CVHF, and CVHG sequence of operation: satisfied setpoint Figure 11. CVHE, CVHF and CVHG sequence of operation: normal shutdown to stopped and run inhibit CVHE-SVU01E-EN 15
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General Information To ensure proper lubrication and A dual eductor system is used to Oil and Refrigeration Pump prevent refrigerant from condensing reclaim oil from the suction cover Compressor Lubrication System - in the oil tank, a 750-watt heater is and the evaporator, and deposit it A schematic diagram of the immersed in the oil tank and is used back into the oil tank. These eductors compressor lubrication system is to warm the oil while the unit is off. use high pressure condenser gas to i
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General Information Figure 12. Oil refrigerant pump CVHE-SVU01E-EN 17
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General Information If the current exceeds the setpoint, input, an analog input, is at 1A17 Base Loading Control the current limit algorithm unloads. terminals J2 – 1 and 3 (Ground) Algorithm: The “Capacity Limited By High which sets the external base loading This feature allows an external Current” message normally setpoint, and can be controlled by controller to directly modulate the displayed while the current limit either a 2-10Vdc or 4-20ma Signal. At capacity of the chiller. It is typicall
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General Information Figure 13. Base loading with external mA input and with external voltage input CVHE-SVU01E-EN 19
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General Information Ice Machine Control Figure 14. CVHE, CVHF and CVHG sequence of operation: ice making: running The control panel provides a service to ice making level “Enable or Disable” menu entry for the Ice Building feature when the Ice Building option is installed. Ice Building can be entered 1) from the “Front Panel”, 2) if hardware is specified, will accept either an isolated contact closure (1A19 Terminals J2-1 and J2-2 (Ground) ) 3), a remote communicated input (Tracer) to initiate
