Magnitude Frictionless Centrifugal Chiller

Transcription

1 Installation Manual IM Group: Chiller Part Number: Effective: February 2010 Supersedes: November 2009 Magnitude Frictionless Centrifugal Chiller Model WME 400 to 550 tons (1400 to 1900 kw) 3/60/460 R-134a

2 Table of Contents INTRODUCTION... 3 INSTALLATION... 4 RECEIVING AND HANDLING... 4 LOCATION AND MOUNTING... 4 LOCATION AND MOUNTING... 5 SYSTEM WATER VOLUME... 6 WATER PIPING... 8 SYSTEM PUMPS FIELD INSULATION GUIDE RELIEF VALVES ELECTRICAL POWER WIRING CONTROL WIRING...14 DIMENSIONS...16 WEIGHTS AND PHYSICAL DATA...23 PRESTART SYSTEM CHECKLIST...24 OPERATION...25 OPERATOR RESPONSIBILITIES...25 STANDBY POWER...25 MICROTECH E CONTROL...25 Recognize Safety Symbols, Words, and Labels The following symbols and labels are used throughout this manual to indicate immediate or potential hazards. It is the responsibility of the owner and installer to read and comply with all safety information and instructions accompanying these symbols. Failure to heed safety information increases the risk of property damage and/or product damage, serious personal injury or death. Improper installation, operation and maintenance can void the warranty. CAUTION Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided. WARNING Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided. DANGER Dangers indicate a hazardous situation which will result in death or serious injury if not avoided. Manufactured in an ISO certified facility 2009 McQuay International. Illustrations and data cover the McQuay International product at the time of publication and we reserve the right to make changes in design and construction at anytime without notice. The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; LONMARK, LonTalk, LONWORKS, and the LONMARK logo are managed, granted and used by LONMARK International under a license granted by Echelon Corporation; Compliant Scroll from Copeland Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; Victaulic from Victaulic Company; Magnitude, Energy Analyzer, FanTrol, MicroTech E, Open Choices, and SpeedTrol from McQuay International. 2 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

3 Introduction General Description Daikin McQuay Magnitude model WME frictionless centrifugal chillers are complete, self-contained, automatically controlled fluid chilling units. Each unit is completely assembled and factory tested before shipment. Model WME is cooling-only. In the Magnitude Model WME, each unit has one compressor connected to a condenser and evaporator. The chillers use refrigerant R-134a to reduce the size and weight of the package compared to negative pressure refrigerants and since R-134a operates at a positive pressure over the entire operation range, no purge system is required. The controls are pre-wired, adjusted and tested. Only normal field connections such as piping, electrical and interlocks, etc. are required, thereby simplifying installation and increasing reliability. Most necessary equipment protections and operating controls are factory-installed in the control panel. The chillers are designed for indoor, non-freezing locations. If indoor freezing temperatures are possible, special procedures described in this manual must be followed to drain the unit. Outdoor locations require a special weatherproof design. Application The procedures presented in this manual apply to standard Model WME chillers. Refer to the Operating Manual, OMM 1034 for detailed information about chiller operation and the MicroTech-E unit controller. All McQuay centrifugal chillers are factory tested prior to shipment and must be initially started at the job site by a factory trained McQuay service technician. Failure to follow this startup procedure can affect the equipment warranty. The standard limited warranty on this equipment covers parts that prove defective in material or workmanship. Specific details of this warranty can be found in the warranty statement furnished with the equipment. Nomenclature W M E 0500 W = Water-cooled M = Magnetic Bearing Chiller Model, Nominal Tons Vintage IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 3

4 Installation Receiving and Handling The unit should be inspected immediately after receipt for possible damage. All McQuay centrifugal water chillers are shipped FOB factory and all claims for handling and shipping damage are the responsibility of the consignee. Insulation corners from the evaporator's rigging hole locations are shipped loose and should be glued in place after the unit is finally placed. Neoprene vibration pads are also shipped loose. Check that these items have been delivered with the unit. If so equipped, leave the shipping skid in place until the unit is in its final position. This will aid in handling the equipment. Extreme care must be used when rigging the equipment to prevent damage to the control panels or refrigerant piping. See the certified dimension drawings included in the job submittal for the center of gravity of the unit. Consult the local McQuay sales office for assistance if the drawings are not available. The unit can be lifted by fastening the rigging hooks to the four outside corners of the unit where the rigging eyes are located. Lengthwise and crossway spreader bars must be used between the rigging lines to prevent damage to the control panels, piping and especially the large Variable Frequency Drive (VFD) power panel located at one end of the unit. Figure 1, Lifting Points VFD Power Panel Power Cable Entry Lifting Point (Outside Corner Hidden) Lifting Point Lifting Points Note: This drawing is for general reference only. Refer to dimension drawings for actual location of components. 4 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

5 Location and Mounting The unit must be mounted on a level concrete or steel base and must be located to provide service clearance at one end of the unit for possible removal of evaporator tubes and/or condenser tubes. The length of the vessel should be allowed at one end for this purpose. Doors or removable wall sections can be utilized for tube clearance. Evaporator and condenser tubes are rolled into the tube sheets to permit replacement if necessary. Minimum clearance at all other points, including the top, is 3 feet (1 meter) unless greater clearance is required by other codes or job conditions. The National Electric Code (NEC) can require four feet or more clearance in and around electrical components and must be checked. Operating Limits Daikin McQuay Magnitude units are designed for indoor, non-freezing locations. Outdoor locations will require special design considerations. Table 1: Operating Parameters Leaving chilled water (ice duty not available) Max. operating evaporator inlet fluid temperature 38 F to 60 F (3.3 C to 15 C) 66 F (19 C) Max. startup evaporator inlet fluid temperature 90 F (32 C) Max. standby inlet fluid temperature Min. condenser water entering temperature Max. leaving condenser water temperature 105 F (46 C) See Figure 3, page F (46 C) Vibration Pads The shipped-loose neoprene vibration pads should be located under the corners of the unit (unless the job specifications state otherwise). They are installed to be flush with the sides and outside edge of the feet. Most Model WME units have six mounting feet although only the outer four are required. Six pads are shipped and the installer can place pads under the middle feet if desired. Mounting Make sure that the floor or structural support is adequate to support the full operating weight of the unit. It is usually not necessary to bolt the unit to the mounting slab or framework; but should this be desirable, 1 1/8" (28.5 mm) mounting holes are provided in the unit support at the four corners. Note: Units are shipped with refrigerant valves closed to isolate the refrigerant for shipment. Valves must remain closed until start-up by the McQuay technician. Nameplates There are several identification nameplates on the chiller: The unit nameplate is located on the side of the VFD panel. This plate also lists the unit refrigerant charge, electrical data and the unit model number and serial number, which should be used when communicating with McQuay. Vessel nameplates are located on the evaporator and condenser. Along with other information, they have a National Board Number (NB) and serial number, either of which identifies the vessel (but not the entire unit). A compressor nameplate is located on the compressor itself and contains identification numbers. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 5

6 System Water Volume All chilled water systems need adequate time to recognize a load change, respond to that load change and stabilize, without undesirable short cycling of the compressors or loss of control. In air conditioning systems, the potential for short cycling usually exists when the building load falls below the minimum chiller plant capacity or on close-coupled systems with very small water volumes. Some of the things the designer should consider when looking at water volume are the minimum cooling load, the minimum chiller plant capacity during the low load period and the desired cycle time for the compressors. Assuming that there are no sudden load changes and that the chiller plant has reasonable turndown, a rule of thumb of gallons of water volume equal to two to three times the chilled water gpm flow rate is often used. A properly designed storage tank should be added if the system components do not provide sufficient water volume. Figure 2, Unit Water Volumes Evaporator Water Volume US Gallon (L) Condenser Water Volume US Gallon (L) E (723) C gal. (545 L) E (555) C gal. (419 L) Condenser Water Temperature Figure 3: MODEL WME Minimum Entering Condenser Water Temperature (EXV) (10 F Range at Full Load) 65 ECWT ( F) F LChWT 44 F LChWT 42 F LChWT Percent Load When the ambient wet bulb temperature is lower than design, the entering condenser water temperature of Magnitude model WME chillers can be lowered to improve chiller performance. Chillers can start with entering condenser water temperatures as low as 40 F (4.4 C). For short periods of time during startup, the entering condenser water temperature can even be lower than the leaving chilled water temperature. Magnitude model WME chillers are equipped with electronic expansion valves (EXV) and will run with entering condenser water temperatures as low as shown in Figure 3 or as calculated from the following equation on which the curves are based: Min. ECWT = 5.25+(LWT)-0.75*DT FL *(PLD/100)+14 *(PLD/100) 2 Where: ECWT = Entering condenser water temperature LWT = Leaving chilled water temperature DTFL = Chilled Water Delta-T at full load PLD = The percent chiller load point to be checked 6 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

7 For example; at 44 F LWT, 10 F Delta-T at full load, and 50% full load operation, the entering condenser water temperature could be as low as 49 F. This provides excellent operation with water-side economizer systems. Depending on local climatic conditions, using the lowest possible entering condenser water temperature may be more costly in total system power consumed than the expected savings in chiller power would suggest, due to the excessive fan power required. In this scenario, cooling tower fans would continue to operate at 100% capacity at low wet bulb temperatures. The trade-off between better chiller efficiency and fan power should be analyzed for best overall system efficiency. McQuay s Energy Analyzer program can optimize the chiller/tower operation for specific buildings in specific locales. Even with tower fan control, some form of water flow control, such as tower bypass, is recommended. Figure 4 illustrate two temperature-actuated tower bypass arrangements. The Cold Weather scheme provides better startup under cold ambient air temperature conditions. The bypass valve and piping are indoors and thus warmer, allowing for warmer water to be immediately available to the condenser. The check valve may be required to prevent air at the pump inlet. Figure 4, Bypass, Mild Weather Operation Bypass, Cold Weather Operation Condenser water temperature control The standard MicroTech controller is capable of three stages of tower fan control plus an analog control of either a three-way tower-bypass valve or variable speed tower-fan motor. Stages are controlled from condenserwater temperature. The three-way valve can be controlled to a different water temperature or track the current tower stage. This allows optimum chilled water plant performance based upon specific job requirements. Pumps The condenser water pump(s) must be cycled off when the last chiller of the system cycles off. This will keep cold condenser water from migrating refrigerant to the condenser. Cold liquid refrigerant in the condenser can make start-up difficult. In addition, turning off the condenser water pump(s) when the chillers are not operating will conserve energy. Include thermometers and pressure gauges at the chiller inlet and outlet connections and install air vents at the high points of piping. Where noise and vibration are critical and the unit is mounted on spring isolators, flexible piping and conduit connections are necessary. Variable Fluid Flow Rates and Tube Velocities Many chiller system control and energy optimization strategies require significant changes in evaporator and condenser water flow rates. The Magnitude model WME chiller line is particularly well suited to take full advantage of these energy saving opportunities provided that the maximum and minimum fluid flow rates are IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 7

8 taken into consideration for a specific application. The sales engineer has the flexibility to use different combinations of shell size, number of tubes, and pass arrangements to select the optimum chiller for each specific application. Both excessively high and excessively low fluid flow rates should be avoided. Excessively high fluid flow rates and correspondingly high tube velocities will result in high fluid pressure drops, high pumping power, and potentially tube corrosion and or tube corrosion damage. Excessively low fluid flow rates and correspondingly low velocities should also be avoided as they will result in poor heat transfer, high compressor power, sedimentation and tube fouling. Excessively high and low tube velocities can be particularly problematic and damaging in open loop systems. Rates of Fluid Flow Change If it is decided to vary the evaporator water flow rate the rate of change should not exceed 50% per minute and should not exceed the minimum or maximum velocity limits as determined by the McQuay chiller software program. Vibration Mounting The Magnitude model WME chillers are almost vibration-free. Consequently, floor mounted spring isolators are not usually required. Rubber mounting pads are shipped with each unit. It is wise to continue to use piping flexible connectors to reduce sound transmitted into the pipe and to allow for expansion and contraction. System Water Volume All chilled water systems need adequate time to recognize a load change, respond to that load change and stabilize, without undesirable short cycling of the compressors or loss of control. In air conditioning systems, the potential for short cycling usually exists when the building load falls below the minimum chiller plant capacity or on close-coupled systems with very small water volumes. Some of the things the designer should consider when looking at water volume are the minimum cooling load, the minimum chiller plant capacity during the low load period and the desired cycle time for the compressors. Assuming that there are no sudden load changes and that the chiller plant has reasonable turndown, a rule of thumb of gallons of water volume equal to two to three times the chilled water gpm flow rate is often used. A properly designed storage tank should be added if the system components do not provide sufficient water volume. System Analysis Although we recommend analyzing the entire system, it is generally effective to place the chiller in the most efficient mode because it is a large energy consumer. The McQuay Energy Analyzer program is an excellent tool to investigate the entire system efficiency, quickly and accurately. It is especially good at comparing different system types and operating parameters. Contact your local McQuay sales office for assistance on your particular application. Water Piping Vessel Drains at Start-up Unit vessels are drained of water in the factory and are shipped with the drain plugs in the heads removed and stored in the control panel or with open ball valves in the drain hole. Be sure to replace plugs or close the valves prior to filling the vessel with fluid. 8 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

9 Evaporator and Condenser Water Piping All evaporators and condensers come standard with Victaulic AWWA C-606 groove nozzles (also suitable for welding), or optional flange connections. The installing contractor must provide matching mechanical connections or transitions of the size and type required.! CAUTION If welding is to be performed on the mechanical or flange connections, remove temperature sensors and thermal dispersion flow switch from the nozzles to prevent damage to those components. Also properly ground the unit or severe damage to the MicroTech E unit controller can occur. Water pressure gauge connection taps and gauges must be provided in the field piping at the inlet and outlet connections of both vessels for measuring the water pressure drops. The pressure drops and flow rates for the various evaporators and condensers are job specific and the original job documentation can be consulted for this information. Be sure that water inlet and outlet connections match certified drawings and stenciled nozzle markings. The condenser is connected with the coolest water entering at the bottom to maximize subcooling.! CAUTION When common piping is used for both heating and cooling modes, care must be taken to provide that water flowing through the evaporator cannot exceed 110 F which can cause the relief valve to discharge refrigerant or damage controls. The piping must be supported to eliminate weight and strain on the fittings and connections. Piping must also be adequately insulated. A cleanable 20-mesh water strainer must be installed in both water inlet lines. Sufficient shutoff valves must be installed to permit draining the water from the evaporator or condenser without draining the complete system. Victaulic Couplings Use the following steps when installing Victaulic couplings: 1. Check for smooth pipe between the pipe end and the groove. Remove any indentations, projections, or weld seams. Failure to do this can result in a leaking joint. 2. Apply a thin coat of Victaulic or silicon lubricant to the gasket lips and exterior. 3. Position the gasket over the pipe end without overhanging the pipe. 4. Join the pipes together and slide the gasket into position, centering it between the groves. 5. Install the housing halves over the gasket, making sure that the housing keys engage the groves on both pipes. 6. Install the bolts and thread the nuts on hand tight. Make sure that the oval heads of the bolts seat properly in the bolt holes. 7. Tighten the nuts evenly by alternating sides until metal to metal contact is made on the housing bolt pads. Make sure that the housing keys completely engage the pipe grooves. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 9

10 Tower Filtering and Treatment Owners and operators must be aware that if the unit is operating with a cooling tower, cleaning and flushing the cooling tower is required. Make sure tower blow-down or bleed-off is operating. Atmospheric air contains many contaminants, which increases the need for water treatment.! CAUTION The use of untreated water will result in corrosion, erosion, slime buildup, scaling, or algae formation. Water treatment service must be used. McQuay International is not responsible for damage or faulty operation from untreated or improperly treated water. Special care must be taken when utilizing open system water that is usually not treated (such as lakes, rivers, and ponds). Special tube and water head material may be required to reduce damage from corrosion. Flow Switches Thermal dispersion flow switches are provided as standard. They are mounted in an evaporator and condenser water nozzle and factory wired. An additional paddle-type flow switch can be installed in the vessel outlet piping as an added precaution to signal the presence of adequate water flow to the vessels before the unit can start. They also serve to shut down the unit in the event that water flow is interrupted to guard against evaporator freeze-up or excessive discharge pressure. They are not necessary for unit operation. Figure 5, Unit-Mounted Flow Switch Figure 6, Flow Switch Mounting Flow direction marked on switch I in. (25mm) NPT flow switch connection Tee If flow switches, by themselves, are being used, electrical connections in the Unit Control Panel must be made per the field wiring diagram on page 15. The normally open contacts of the flow switch must be wired between the terminals. Flow switch contact quality must be suitable for 24 VAC, low current (16ma). Flow switch wire must be in separate conduit from any high voltage conductors (115 VAC and higher). Figure 7, Flow Switch Flow Rates Pipe Size (NOTE) Min. Adjst. Flow No Flow inch 1 1/4 1 1/ / mm 32 (2) 38 (2) (3) (4) 127 (4) 153 (4) 204 (5) gpm Lpm gpm Lpm Max. Adjst. Flow No Flow gpm Lpm gpm Lpm A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose. 2. Flow rates for a 2-inch paddle trimmed to fit the pipe. 3. Flow rates for a 3-inch paddle trimmed to fit the pipe. 4. Flow rates for a 3-inch paddle. 5. Flow rates for a 6-inch paddle 6. There is no data for pipe sizes above 8-inch. A switch minimum setting should provide protection against no flow and close well before design flow is reached. 10 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

11 ! CAUTION Freeze Notice: Neither the evaporator nor the condenser is self-draining; Both must be blown out to help avoid damage from freezing. The piping should also include thermometers at the inlet and outlet connections and air vents at the high points. 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, new head gaskets must be used and control sensors relocated. In cases where the water pump noise can be objectionable, vibration isolation sections are recommended at both the inlet and outlet of the pump. In most cases, it will not be necessary to provide vibration eliminator sections in the condenser inlet and outlet water lines. But they can be required where noise and vibration are critical. System Pumps Operation of the chilled water pump can be to: 1. Cycle the pump with the compressor, 2. Operate continuously, or 3. Start automatically by a remote source. The cooling tower pump must cycle with the chiller. The holding coil of the cooling tower pump motor starter must be rated at 115 volts, 60 Hz, with a maximum volt-amperage rating of 100. A control relay is required if the voltage-amperage rating is exceeded. See the Field Wiring Diagram or in the cover of control panel for proper connections. All interlock contacts must be rated for no less than 10 inductive amps. The alarm circuit provided in the control center utilizes 115-volts AC. The alarm used must not draw more than 10 volt amperes. Field Insulation Guide Factory insulation is an available option (0.75 or 1.5 ). If field insulated, the following components should be insulated to prevent condensation on Magnitude model WME chillers. Figure 8, Insulation Guide Evaporator Evaporator Water Heads Expansion valve Motor Cooling lines ( rotor) Suction Elbow VFD cooling return line Stator cooling return line Evaporator Tube Sheet Notes: 1. The discharge line can be insulated for sound reduction, as an option. 2. The compressor body does not require insulation. 3. Insulation quantities: E3612 = 129 sq.ft. (12 m 2 ), E3012=115 sq ft. (11 m 2 ) IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 11

12 Relief Valves As a safety precaution and to meet code requirements, each chiller is equipped with pressure relief valves located on the condenser, evaporator, and oil sump vessel for the purpose of relieving excessive refrigerant pressure (caused by equipment malfunction, fire, etc.) to the atmosphere. Most codes require that relief valves be vented to the outside of a building, and this is a desirable practice for all installations. Relief piping connections to the relief valves must have flexible connectors. Figure 9: Typical Vent Piping Note: 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 run in accordance with local code requirements; where local codes do not apply, the latest issue of ANSI/ASHRAE Standard 15 code recommendations must be followed. Condensers have two relief valves as a set with a three-way valve separating the two valves (large condensers will have two such sets). One valve remains active at all times and the second valve acts as a standby. Figure 10, Relief Valve Data Model Relief Valve Location Pressure Setting Discharge Cap. Conn. Size No. of Valves WME Evaporator Condenser Top of Evaporator Top of Condenser 200 psi 200 psi 75.5 lb air/min 75.5 lb air/min 1 in. FPT 1 1 in. FPT 2 Figure 11, Condenser 3-Way Valve 12 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

13 Refrigerant Vent Piping Twin relief valves mounted on a transfer valve are used on the condenser so that one relief valve can be shut off and removed, leaving the other in operation. Only one of the two is in operation at any time. Vent piping is sized for only one valve of the set since only one can be in operation at a time. In no case would a combination of evaporator and condenser sizes require more refrigerant than the pumpdown capacity of the condenser. Condenser pumpdown capacities are based on the current ANSI/ASHRAE Standard 15 that recommends 90% full at 90 F (32 C). To convert values to the older AHRI standard, multiply pumpdown capacity by Sizing Vent Piping (ASHRAE Method) Relief valve pipe sizing is based on the discharge capacity for the given evaporator or condenser and the length of piping to be run. Discharge capacity for R-134a vessels is calculated using a complicated equation that accounts for equivalent length of pipe, valve capacity, Moody friction factor, pipe ID, outlet pressure and back pressure. The formula, and tables derived from it, are contained in ASHRAE Standard Using the ASHRAE formula and basing calculations on the 225 psi design yields a conservative pipe size, which is summarized in Figure 12. The table gives the pipe size required per relief valve. When valves are piped together, the common piping must follow the rules set out in the following paragraph on common piping. Figure 12. Relief Valve Piping Sizes Equivalent length (ft) Pipe Size inch (NPT) 1 1/4 1 1/ /2 3 4 Moody Factor NOTE: A 1-inch pipe is too small for the flow from the valves. A pipe increaser must always be installed at the valve outlet. Common Relief Valve Piping According to ASHRAE Standard 15, the pipe size cannot be less than the relief valve outlet size. The discharge from more than one relief valve can be run into a common header, the area of which cannot be less than the sum of the areas of the connected pipes. For further details, refer to ASHRAE Standard 15. The common header can be calculated by the formula: DCommon D D Dn The above information is a guide only. Consult local codes and/or latest version of ASHRAE Standard 15 for sizing data. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 13

14 Electrical Wiring, fuse and wire size must be in accordance with the National Electric Code (NEC). Important: Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard. This is an important restriction that must be adhered to. Power Wiring CAUTION Qualified and licensed electricians must perform wiring. Shock hazard exists. CAUTION Connections to terminals must be made with copper lugs and copper wire. Use only copper supply wires with ampacity based on 75 C conductor rating. (Exception: for equipment rated over 2000 volts, 90 C or 105 C rated conductors should be used). The VFD nameplate will indicate the RLA setting required in the MicroTech-E controller. The RLA setting is for the VFD output amps not the input amps. Follow name plate values for output RLA. Control Wiring The control circuit power on Magnitude model WME chillers is supplied by the unit-mounted VFD. Figure 13, Unit Control Panel Normal Shutdown Switch Immediate Shutdown Switch External Control Wiring Entry (4) External Control Terminal Strip Ethernet Port External Normal Shutdown Switch USB Ports (2). 14 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

15 Figure 14, Field Control Wiring Diagram Note: The above wiring connections are located on the I/O board in the control panel. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 15

16 Dimensions Figure 15: Model WME E3612/C pass, M2 standard motor (See page 20 for drawing notes) LB RB Z LF X O.I.T.S. TOP VIEW EVAP. (UNIT OVERALL) ,6,7 RF EVAP RELIEF VALVE COND RELIEF VALVES 3 Y EVAP CONDENSER X UNIT CTRL. BOX COND ,6,7 FRONT VIEW M2 VFD 4,6, ,9, UNIT O/A VFD HEIGHT Y Z UNIT O/A RIGHT VIEW INLET CL CL OUTLET Ø12.0 [305] NOM CL CL Ø10.0 [254] NOM OUTLET INLET 6,7 EVAPORATOR HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE 6,7 CONDENSER HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE ENVELOPE OF UNIT Ø 1.13 [ 29] MTNG. HOLE MOUNTING FEET Z X UNIT CONT. BOX TOP VIEW M2 VFD 4,12, *R A3* WME500 - E3612RA C3012RA M2 150PSI W/S This information is accurate at time of printing. McQuay reserves the right to change design, specification and product data without notice. Purchaser must determine that the equipment is fit and sufficient for the job specifications. No change to this data may be made unless approved in writing by McQuay. McQuay's Limited Product Warranty applies to all McQuay equipment. 16 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

17 Figure 16: Model WME E3612/C pass, M3 (Low THD) motor (See page 20 for drawing notes) LB RB Z LF X O.I.T.S. TOP VIEW EVAP. (UNIT OVERALL) ,6,7 RF EVAP RELIEF VALVE COND RELIEF VALVES 3 Y EVAP CONDENSER X UNIT CTRL. BOX COND ,6,7 FRONT VIEW M3 VFD ,6, VFD HEIGHT UNIT O/A 4,9, Y Z UNIT O/A RIGHT VIEW INLET CL CL OUTLET Ø 12.0 [305] NOM CL CL Ø 10.0 [254] NOM OUTLET INLET 6,7 EVAPORATOR HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE 6,7 CONDENSER HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE ENVELOPE OF UNIT Ø 1.13 [ 29] MTNG. HOLE MOUNTING FEET Z X UNIT CONT. BOX TOP VIEW M3 VFD 4,12, *R A2* WME500 - E3612RA C3012RA M3 150PSI W/S This information is accurate at time of printing. McQuay reserves the right to change design, specification and product data without notice. Purchaser must determine that the equipment is fit and sufficient for the job specifications. No change to this data may be made unless approved in writing by McQuay. McQuay's Limited Product Warranty applies to all McQuay equipment. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 17

18 Figure 17: Model WME E3012/C pass, M2 standard motor (See page 20 for drawing notes) LB RB Z LF X O.I.T.S. TOP VIEW EVAP. (UNIT OVERALL) ,6,7 RF UNIT O/A EVAP RELIEF VALVE COND RELIEF VALVES 3 Y EVAPORATOR CONDENSER X UNIT CTRL. BOX COND ,6,7 FRONT VIEW M2 VFD 4,6, VFD HEIGHT UNIT O/A 4,9, *R A2* 2 3 WME500 - E3012RA C2612RA M2 150PSI W/S Y Z RIGHT VIEW Ø C [203] L C L NOM INLET OUTLET 180 OUTLET Ø 10.0 [254] NOM. C L C L INLET 6,7 EVAPORATOR HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE 6,7 CONDENSER HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE ENVELOPE OF UNIT Ø 1.13 [29] MTNG. HOLE MOUNTING FEET Z X UNIT CONT. BOX TOP VIEW M2 VFD 4,12, This information is accurate at time of printing. McQuay reserves the right to change design, specification and product data without notice. Purchaser must determine that the equipment is fit and sufficient for the job specifications. No change to this data may be made unless approved in writing by McQuay. McQuay's Limited Product Warranty applies to all McQuay equipment. *R A3* 18 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

19 Figure 18: Model WME E3012/C pass, M3 (Low THD) motor (See page 20 for drawing notes) LB 13.7 RB Z LF X O.I.T.S. TOP VIEW EVAP. (UNIT OVERALL) ,6,7 RF UNIT O/A EVAP RELIEF VALVE COND RELIEF VALVES 3 Y EVAPORATOR CONDENSER X UNIT CTRL. BOX COND ,6,7 FRONT VIEW M3 VFD ,6, UNIT O/A 4,9, VFD HEIGHT Y Z RIGHT VIEW Ø CL CL [203] NOM. 7.1 INLET OUTLET 180 OUTLET Ø 10.0 [254] NOM. CL CL INLET 6,7 EVAPORATOR HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE 6,7 CONDENSER HEAD 2-PASS VICTAULIC 150 PSI WATERSIDE ENVELOPE OF UNIT Ø 1.13 [29] MTNG. HOLE MOUNTING FEET Z X UNIT BOX CONT TOP VIEW M3 VFD 4,12, *R A2* WME500 - E3012RA C2612RA M3 150PSI W/S This information is accurate at time of printing. McQuay reserves the right to change design, specification and product data without notice. Purchaser must determine that the equipment is fit and sufficient for the job specifications. No change to this data may be made unless approved in writing by McQuay. McQuay's Limited Product Warranty applies to all McQuay equipment. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 19

20 Drawing Notes 1 All dimensions are in inches [millimeters] unless noted otherwise. 2 Final connections must allow for 0.5 inch +/- (12.7mm) manufacturing tolerances inch FPT [25.4 mm] evaporator and condenser relief valves must be piped per ANSI / ASHRAE 15. Number of relief valves is 1 per evaporator and 2 per condenser inch [9 mm] suction nozzle relief valve must be piped per ANSI / ASHRAE Clearances: Allow a minimum of 3 ft. on all for sides and the top sides of chiller to allow for service access. Provide a minimum of 3 ft. clearance in front of chiller starter panel or according to NEC or local codes. Provide a minimum of 14 ft. clearance on one end of the chiller for tube removal. 6 Electric Panels- Most codes require 48 inches (1219 mm) clearance in front of control boxes and electrical panels. Check codes for your location inch [83mm] diameter lifting holes are provided. See installation manual IM 1033 (available on for lifting instructions. 8 All water connections are given in standard U.S. pipe sizes. Standard connections are suitable for welding or victaulic couplings. 9 Unit shown has standard right-hand water connections. Left-hand connections are available for either vessel. For right hand evaporator the inlet and outlet nozzles are reversed. ANSI-flanged connections are available upon request. When using ANSI-flanged connections add 0.5 inch [13 mm] to each flanged end. 10 Dimensions shown are for units (evaporator / condenser) with standard design pressures. The waterside design pressure is 150 PSI {1034 kpa}. Consult the factory for unit dimensions with higher design pressures. 11 The unit vibration isolator pads are provided for field installation and when fully loaded are inches [6 mm] thick. 12 These values are for units with standard wall thickness copper tubing only. 13 The shipping skid adds 4.00 inches [105 mm] to the overall unit height. 14 If main power wiring is brought up through the floor, this wiring must be outside the envelope of the unit. 15 The unit is shipped with an operating charge of refrigerant. 16 Optional marine water box connections are available upon request. Table 4: WME 0500 Overall Dimensions (2-Pass with right-hand connections) In. (mm) E36 C30 E30 C Length 170 (4329) 170 (4329) 169 (4292) 169 (4292) Width 78 (1985) 78 (1985) 70 (1785) 73 (1844) Height 97 (2460) 95 (2446) 93 (2359) 92 (2345) 20 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

21 Standard Head Connection Dimensions Figure 5: Standard Head Connection Dimensions (Victaulic and Flanged) Figure 19: Standard Head Dimensions Evaporator Diameter 1 PASS 2 PASS 3 PASS AA BB AA BB FF GG AA BB FF UU Return Head E E Condenser Diameter 1 PASS 2 PASS 3 PASS AA BB AA BB FF GG AA BB FF UU Return Head C C IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 21

22 Marine Water Box Dimensions Marine water boxes are an available option on all evaporator and condenser sizes. Caution: There is some nomenclature confusion in the industry. We refer to our standard dished heads as dished heads. Some manufacturers refer to them, or similar devices as water boxes. They are not marine water boxes with removable end covers as illustrated below. Figure 20: Marine Water Box Dimensions with Victaulic or Flanged Connections Evap. Dia. 1 PASS 2 PASS 3 PASS AAA BBB CCC DDD EEE AAA BBB CCC DDD EEE FFF GGG AAA BBB CCC DDD EEE FFF E E Cond. Dia. 1 PASS 2 PASS 3 PASS AAA BBB CCC DDD EEE AAA BBB CCC DDD EEE FFF GGG AAA BBB CCC DDD EEE FFF C C Notes: 1.Dimensions in inches. 2.Flanges are ANSI raised face. Mating flanges by others. 3.Some condensers with flanges can have staggered connections due to flange interference. Consult factory. 4.Flanges add 0.5 inches to the distance from the vertical centerline to the flange face compared to Victaulic Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

23 Weights and Physical Data Lifting and Mounting Weights Figure 21: Corner Identification NOTES: 1 The block shown above is the mounting footprint, not the entire unit footprint. 2 Lifting holes in the top of the tube sheets are 3.25-inch (83 mm) diameter. 3 Mounting holes in the feet are inch diameter. Table 1:: Lifting and Mounting Weights WME Model Vessel Models (Size) Motor Code 0500 E3612/C3012 M E3012/C2612 M E3612/C3012 M E3012/C2612 M3 WME Model Vessel Models (Size) Motor Code 0500 E3612/C3012 M E3012/C2612 M E3612/C3012 M E3012/C2612 M3 Lifting (Shipping) Weight, lbs (kg) Center of Gravity in. (mm) LF RF LB RB Total X Y Z 4003 (1816) 3130 (1420) 4245 (1925) 3389 (1537) 4479 (2032) 3626 (1645) 5090 (2309) 4272 (1938) 3940 (1787) 2997 (1359) 3886 (1763) 2925 (1327) 4408 (1999) 3471 (1575) 4660 (2114) 3687 (1673) Mounting (Operating) Weight, lbs (kg) (7634) (5998) (8110) (6475) 76.8 (1951) 78.0 (1981) 79.3 (2014) 81.1 (2060) 38.0 (964) 36.1 (917) 39.2 (996) 37.5 (952) 34.2 (869) 28.4 (721) 33.0 (838) 26.9 (683) Center of Gravity in. (mm) LF RF LB RB Total X Y Z 4632 (2101) 3556 (1613) 4879 (2213) 3821 (1733) 5044 (2288) 4001 (1815) 5649 (2562) 4641 (2105) 4742 (2151) 3520 (1597) 4682 (2124) 3443 (1562) 5164 (2342) 3959 (1796) 5421 (2459) 4181 (1897) (8882) (6820) (9358) (7297) 75.8 (1925) 77.0 (1956) 78.0 (1981) 79.7 (2024) 37.2 (946) 35.4 (898) 38.3 (974) 36.7 (931) 34.9 (886) 28.8 (732) 33.8 (859) 27.5 (699) NOTES: 1. See unit dimension drawing for lifting and mounting locations. 2. The block shown above is the mounting footprint, not the entire unit footprint. 3. Lifting holes in the top of the tube sheets are 3.25-inch (83 mm) diameter. 4. Mounting holes in the feet are inch diameter. IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 23

24 Prestart System Checklist Yes No N/A Chilled Water Piping complete Water system filled, vented... Pumps installed, (rotation checked), strainers cleaned... Controls (3-way, face and bypass dampers, bypass valves, etc.) operable Water system operated and flow balanced to meet unit design requirements Condenser Water (*) Cooling tower flushed, filled and vented... Pumps installed, (rotation checked), strainers cleaned... Controls (3-way, bypass valves, etc.) operable... Water system operated and flow balanced to meet unit requirements Electrical Power leads connected... Control interlock wiring complete and complies with specifications Pump starters and interlock wired... Cooling tower fans and controls wired... Wiring complies with National Electrical Code and local codes. Condenser pump starting relay (CWR) installed and wired... Miscellaneous Relief valve piping complete... Thermowells, thermometers, gauges, control wells, controls, etc., installed Minimum system load of 80% of machine capacity available for testing and adjusting controls... Job Name/Location McQuay Order Number Date Signature Note: This checklist must be completed and sent to the local McQuay service location two weeks prior to start-up. 24 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

25 Operation Operator Responsibilities It is important that the operator become familiar with the equipment and the system before attempting to operate the chiller. In addition to reading this manual, the operator should study operation manual OM 1034 available at and the control diagram furnished with the unit before starting, operating, or shutting it down. During the initial startup of the chiller the McQuay technician will be available to answer any questions and instruct in the proper operating procedures. It is recommended that the operator maintain an operating log for each individual chiller unit. In addition, a separate maintenance log should be kept of the periodic maintenance and servicing activities. This McQuay centrifugal chiller represents a substantial investment and deserves the attention and care normally given to keep this equipment in good working order. If the operator encounters abnormal or unusual operating conditions, it is recommended that a McQuay service technician be consulted. McQuay International conducts training for centrifugal operators at its factory Training Center in Staunton, Virginia, several times a year. These sessions are structured to provide basic classroom instruction and include hands-on operating and troubleshooting exercises. For further information, contact your McQuay representative. Standby Power It is essential that any centrifugal chiller connected to standby power come to a complete stop on grid power and then be restarted with the standby power. Attempting to switch from regular grid line power to auxiliary power while the compressor is running can result in extreme transient torque that will severely damage the compressor. MicroTech E Control Figure 22, MicroTech E Control Panel All chillers are equipped with the McQuay MicroTech E control system consisting of: Operator 15-inch color touchscreen interface panel (shown at the left). Unit Control Panel containing the MicroTech E controller, USB interface and miscellaneous switches and field connection terminals. Compressor Controller located in the compressor housing, containing the bearing controls and I/O points for the compressor. VFD power panel containing various drive components and incoming power connections. NOTE: Detailed information on the operation of the MicroTech E control is contained in OMM IM 1033 Magnitude Model WME Frictionless Centrifugal Chillers 25

26 26 Magnitude Model WME Frictionless Centrifugal Chillers IM 1033

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28 All McQuay equipment is sold pursuant to McQuay s Standard Terms and Conditions of Sale and Limited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to form Y. To find your local representative, go to This document contains the most current product information as of this printing. For the most up-to-date product information, please go to (800) IMM 1033 (02/10)