Magnitude™ Magnetic Bearing Centrifugal Chillers Catalog 602-2 Model WMC • 145 to 400 tons • 500 to 1400 kW • R-134a Engineered for flexibility and performance™
Cutaway View of Magnetic Bearing Compressor Compressor Major Running Gear Components MicroTech II® Controller Operator Interface, Home Screen
Table of Contents The New Compressor Technology ....................................................................................................................... 4 Benefit Summary............................................................................................................................................ 4 The Compressor Technology.......................................................................................................................... 5 Low Operating Costs...............
The New Compressor Technology For Magnitude™ Model WME see Catalog 604 management system. With no oil to coat the heat transfer surfaces, a gain in heat exchanger efficiency can be realized. Ultra Quiet A compressor sound level as low as 76 dBA, with virtually no structure-borne vibration, eliminates the need for expensive sound attenuation accessories.
Smart controls Onboard digital electronics provide smart controls. The compressor is totally self-correcting and incorporates a system of sophisticated self-diagnostics, monitoring and controls. Safe power interruption In the event of a power failure, the compressor motor acts as a generator, providing power for the bearing control system during coast down. It also has a system to gently de-levitate the shaft.
Exceptional Control Low Operating Costs User-Friendly Touch Screen Panel Shrink Your Utility Costs with Ultra Efficient Part-Load Performance Every Magnitude chiller is provided with the userfriendly operator interface touch screen panel mounted on the moveable positioning arm for easy viewing and operation. View chiller status, clear faults and change parameters by merely touching the screen.
Extremely Low Vibration Levels As a result of the magnetic bearings and low inertia design, the compressor vibration levels are extremely low, minimizing vibration that could be transmitted to the structure. The unit is shipped with rubber mounting pads and spring vibration isolators are not required. enhancements not found in any other unit controller system on the market today. MicroTech controller's innovative design will help keep your chiller running efficiently . . .
MicroTech II ® Control Features and Benefits FEATURE BENEFIT Easy integration into Building Automation System (BAS) via the exclusive Open Choice™ communication module Designer can select any BAS supplier using standard open protocols and know the MicroTech II control will interface with it.
Figure 2, MicroTech II Home Screen The Daikin McQuay MicroTech controller can record and plot water temperatures, refrigerant pressures, and motor load in order to trend performance. These values can also be downloaded through a convenient USB port in the control panel, and exported into a spreadsheet for further evaluation and record purposes. Figure 4, Trend Logging Screen If an alarm occurs, a red button appears on the screen (a remote signal is also available).
Demand limit control. Maximum motor current draw can be set on the panel, or can be adjusted from a remote 4-20 ma or 1-5 VDC BAS signal. This feature controls maximum demand charges during high usage periods. Condenser water temperature control. Capable of four stages of tower fan control plus an optional analog control of either a three-way tower-bypass valve or variable speed tower-fan motor. Stages are controlled from condenserwater temperature.
Figure 5, Sample System Architecture Table 1, Typical Data Point Availability Typical Data Points1 (W = Write, R = Read) Capacity Limit Output Capacity Limit Setpoint Chiller Enable Chiller Limited Chiller Local/Remote Chiller Mode Output Chiller Mode Setpoint Chiller On/Off Chiller Status Compressor Discharge Temp Compressor Percent RLA Compressor Run Hours Compressor Select Compressor Starts R W W R R R W R R R R R W R Cond EWT Cond Flow Switch Status Cond LWT Cond Pump Run Hours Cond Refrigerant Pres
Unit Design Features Variable Frequency Drive Efficiency: The standard variable frequency drive is a technology that has been used for decades to control motor speed on a wide variety of motordrive applications. When applied to centrifugal compressor motors, significant gains in part load performance can be realized.
Electronic Expansion Valve Controlled refrigerant flow over the entire capacity range saves energy and dollars. Cooling loads and condenser water temperatures can change constantly. On Magnitude chillers, a modern electronic expansion valve meters refrigerant flow in direct response to the unit controller input, which looks at unit kW and lift (discharge minus suction pressure) to set the valve position.
Table 2, ASHRAE 90.1 Requirements (kW/ton) Std. 90.1 Capacity Range Pre 2010 Starting in 2010 Full IPLV Load Path A Path B Full Full IPLV IPLV LoadLoad- 150 Tons 0.703 0.669 0.634 0.596 0.639 0.450 150 Tons 0.634 0.596 0.634 0.596 0.639 0.450 300 Tons 300 Tons 0.576 0.549 0.576 0.549 0.600 0.400 600 Tons NOTE: Beginning in 2010, the 90.1 efficiency requirements have been divided into two groups, designated as Path A and Path B.
Weighting The percent of annual hours of operation at the four load points are as follows: 100% Load at 1% 75% Load at 42% 50% Load at 45% 25% Load at 12% Note that the vast majority of hours are at the operating range where dual compressor chillers excel. Catalog 602-2 Tolerances The AHRI test tolerance, per AHRI Standard 550/590-98, for capacity (tons), power input per ton (kW/ton), and heat balance is: 1500 % Tolerance 10.5 (0.
Chiller Identification Magnitude centrifugal chillers are selected by computer and identified by their components on the selection printout as a Model #.
Sound Data The following sound pressure ratings are for lowering of sound level as the units unload. measurements one meter from the unit and in Ratings are “A” weighted measured at one-meter accordance with ANSI/AHRI Standard 575. The from the unit. The 25 percent values are with one ratings are for the various part loads shown and at compressor running. the center bands. Note that there is a considerable Table 3, WMC 145S Sound Pressure (dB), 50/60 Hz Percent Load 63 Hz 37.0 39.5 37.0 38.
Table 8, WMC 145D/150D, One-Third Octave Band Sound Ratings Percent Load 50 Hz 32.5 32.0 26.5 31.5 100 75 50 25 63 Hz 32.0 32.0 30.5 30.5 80 Hz 34.0 37.5 33.0 32.0 100 Hz 38.0 37.0 36.5 36.5 125 Hz 48.0 47.0 47.0 47.5 160 Hz 42.0 41.0 39.0 40.5 Octave Band 200 Hz 250 Hz 46.0 53.5 45.5 52.5 43.5 52.5 43.5 52.5 315 Hz 51.0 50.0 48.5 49.5 400 Hz 53.0 53.5 52.0 50.5 500 Hz 62.5 58.0 53.5 52.5 630 Hz 60.5 55.5 54.5 54.5 800 Hz 61.0 62.5 62.0 57.
Dimensions Figure 7, WMC 145S (B-vintage), 2-Pass, Right-hand (See page 26 for notes.) 22.6 574 SUCTION RELIEF 3,4 VALVE LB 4 WMC145SBS 26.9 684 CONDENSER RELIEF VALVES 3 22.5 571 EVAPORATOR RELIEFVALVE RB 57.5 1460 332834001 00 NONE DRAWINGNUMBER Z REV. SCALE X RF 5,13,14 LF 5,13 3,4 114.8 2916 81.0 2058 TOP COMPR. 5,10,12 TOPVIEW 134.7 (UNITOVERALL) 3421 5,7,8 18.0 458 3 COMPRESSOR 17.1 435 O.I.T.S. FRONT END BOX 74.3 1887 TOPFRONT END BOX UNIT CTRL BOX 58.
Figure 8, WMC 145D (B-vintage), 2-Pass, Right-hand (See page 26 for notes) 26.3 667 CONDENSER RELIEF 3 VALVES 15.4 391 4 46.0 1168 4 LB RB WMC145DBS 332834101 25.3 643 EVAPORATOR RELIEF 3,4 VALVE SCALE Z X LF RF 22.6 574 SUCTION RELIEF 3,4 VALVE 5,13,14 44.3 1126 (OVERALL WIDTH) 5 5,13 114.8 2916 TOPVIEW 7.6 194 #1 134.7 (UNITOVERALL) 3421 5,7,8 #2 17.1 435 FRONT END BOX UNIT CTRL BOX 58.6 1487 EVAPORATOR RELIEF VALVES 3 9.5 241 5,7,8 13.0 330 INLET 5.3 133 TYPICAL BOTH ENDS 6.
Figure 9, WMC 150D (B-vintage), 2-Pass, Right-hand (See page 26 for notes) 22.6 3,4 574 SUCTION PIPE RELIEFVALVES 46.6 1184 LB 46.0 1168 4 RB 4 WMC150DBS 332834201 26.3 667 CONDENSER RELIEFVALVES 3 00 Z 21.8 3,4 554 EVAPORATOR RELIEFVALVES NONE REV. DRAWINGNUMBER SCALE X 5,13,14 LF RF 5,13 146.9 3732 44.3 5 1126 (OVERALL WIDTH) TOPVIEW 15.5 393 3 17.1 435 #2 #1 FRONT END BOX 37.8 960 81.1 2060 TOP COMPR. 5,10,12 169.6 (UNITOVERALL) 5,7,8 4307 5 32.8 833 5 O.I.T.S. 69.
Figure 10, WMC 250D (B-vintage), 2-Pass, Right-hand (See page 26 for notes) 28.9 735 EVAPORATOR RELIEFVALVES 3,4 27.9 708 CONDENSER RELIEFVALVES 3 24.2 615 SUCTION RELIEF 3,4 VALVES 46.0 1168 15.9 403 RB 4 4 LB WMC250DBS 332834301 00 NONE REV. DRAWINGNUMBER SCALE Z X LF 5,13 RF 5,13,14 114.8 2916 48.0 5 1220 (OVERALL WIDTH) TOPVIEW 135.7 (OVERALL UNIT) 3447 5,7,8 8.1 206 #1 84.0 2134 TOPOF COMPR. 5,10,12 11.1 283 #2 41.5 1054 5 36.4 925 5 O.I.T.S.
Figure 11, WMC 290D (B-vintage), 2-Pass, Right-hand (See page 26 for notes.) 27.9 708 EVAPORATOR 3,4 RELIEF VALVE RB 49.1 1247 46.0 1168 4 LB 4 WMC290DBS 332834401 23.4 595 CONDENSER RELIEF 3 VALVES 00 NONE REV. DRAWINGNUMBER SCALE Z X 5,13 RF 24.2 615 SUCTION RELIEF 3,4 VALVE LF 5,13,14 149.7 3802 TOPVIEW 170.6 (UNITOVERALL) 4333 5,7,8 15.5 393 3 48.0 5 1220 (OVERALL WIDTH) 11.1 283 #2 #1 41.5 1054 84.0 2134 TOPOF COMPR. 5,10,12 5 36.5 927 5 O.I.T.S. FRONT END BOX 74.
Figure 12, WMC 400D (B-vintage), 2-Pass, Right-hand (See page 26 for notes.) 33.4 847 CONDENSER 3 RELIEF VALVES LB 46.0 1168 4 RB 4 WMC400DBS 29.0 737 SUCTION RELIEF VALVES 3,4 28.9 734 EVAPORATOR RELIEF 3,4 VALVES 47.1 1197 332834501 5,13 149.7 3802 15.5 393 3 TOPVIEW #1 UNIT CTRL BOX 81.6 2074 TOP FRONT END BOX 5 EVAPORATOR 3 OUT 54.5 1385 OUT IN 13.1 332 36.0 914 146.9 3732 8.1 207 INLET 10.0 255 NOM. TYP(2X) RIGHTVIEW 13.0 330 INLET/ OUTLET 8.1 207 OUTLET 8.0 203 NOM. TYP.
Marine Water Box Dimensions with Victaulic or Flanged Connections 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.
Drawing Notes NOTES: 1. All dimensions are in inches and [millimeters] unless noted otherwise. 2. Final connections must allow for .500 inch +/- [12.7mm] manufacturing tolerances. 3. 1.00-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. 4. .375 inch [9 mm] suction nozzle relief valve must be piped per ANSI / ASHRAE 15. 5.
Physical Data and Weights Lifting and Mounting Weights "LL" "LW" OH RB LB Z MFW RF X LF MFL OL OW 332834901 DRAWINGNUMBER Catalog 602-2 00 REV.
Physical Data Evaporator Refrigerant-side design pressure is 200 psi (1379 kPa). Water-side is 150 psi (1034 kPa). Approximate total square footage of insulation surface required for individual packaged chillers is tabulated by evaporator code and can be found below. The suction elbow and compressor also require insulation. Table 12, Evaporator Physical Data WMC Model Evaporator Model Tube Length Unit Refrigerant Charge lb.
Relief Valves As a safety precaution and to meet code requirements, each chiller is equipped with pressure relief valves located on the condenser and evaporator 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.
Electrical Data General Note: The RLA for use in the following tables is obtained by the selection of a specific unit by Daikin McQuay. When shipped, a unit will bear the specific RLA, stamped on the nameplate, for the selected operating conditions. ! CAUTION The RLA stamped on the unit may be lower than the minimum shown in the following tables, in which case the minimum table value must be used for wire sizing.
Table 16, WMC 145S-B, 3/50/400 SINGLE POINT CONNECTION, STANDARD COMPRESSOR CHILLER DISC. POWER SWT.
Table 17, WMC 145D-B & WMC 150D-B, 3/60/460 (Continued) MULTI-POINT CONNECTION, OPTIONAL COMPRESSOR (EACH) CHILLER (PER CIRCUIT) DISC. POWER MOP SWT.
Table 19, WMC 145D-B & WMC 150D-B, 3/50/400 SINGLE POINT CONNECTION, STANDARD COMPRESSOR (EACH) CHILLER DISC. POWER SWT.
WMC 250D & 290D, Dual Compressor Table 20, WMC 250D-B & WMC 290D-B, 3/60/460 SINGLE POINT CONNECTION, STANDARD COMPRESSOR (Each) RLA [Amp] LRA [Amp] QTY MCA [Amp] MOP [Amp] 79 to 88 89 to 92 110 110 2 2 178 to 198 201 to 208 250 250 CHILLER DISC. POWER SWT.
Table 21, WMC 250D-B & WMC 290D-B, 3/50/400 SINGLE POINT CONNECTION, STANDARD COMPRESSOR (EACH) CHILLER DISC. POWER SWT.
WMC 400D 3/60/460 ONLY Table 22, WMC 400D-B, 3/60/460 SINGLE POINT CONNECTION, STANDARD COMPRESSOR (EACH) CHILLER DISC. POWER SWT.
Notes for following field wiring diagram 1. The compressor front end box is factory mounted and wired. All incoming line side wiring must be in accordance with the NEC and be made with copper wire and copper lugs only. Use only copper supply wires with ampacity based on 75°c conductor rating. Main power wiring between the front end box and compressor terminals is factory installed. 2. Minimum wire size for 115 VAC is 12 ga. for a maximum length of 50 feet.
A H A H A H A C2 * NOTE10 C3 O *COOLINGTOWERVFD POWER * NOTE4 COMMON 0-10VDC 0-10VDC C1 * NOTE10 O O * NOTE10 C4 * NOTE10 O *COOLINGTOWERBYPASSVALUE * COOLING TOWER FIRST STAGE STARTER * COOLING TOWER SECOND STAGE STARTER * COOLING TOWER THIRD STAGE STARTER * COOLING TOWER FOURTH STAGE STARTER H POWER * NOTE7 NEUTRAL GND 81 A (NOTE6) SWITCH DELTA P FLOWOR COND.
Power Factor Correction Do not use power factor correction capacitors with WMC chillers. Doing so can cause harmful electrical resonance in the system. Correction capacitors are not necessary since VFDs inherently maintain high power factors. The full load power factor exceeds 0.90 for all units. VFD Line Harmonics Despite their many benefits, care must be taken when applying VFDs due to the effect of line harmonics on the building electric system.
The power line noise emissions associated with variable frequency and variable speed drives can cause disturbances in nearby equipment.
Application Considerations Location WMC chillers are intended only for installation in an indoor or weather protected area consistent with the NEMA 1 rating on the chiller, controls, and electrical panels. Equipment room temperature for operating and standby conditions is 40°F to 122°F (4.4°C to 50°C). Optimum Water Temperatures and Flow A key to improving energy efficiency for any chiller is minimizing the compressor pressure lift.
Figure 16, Tower Bypass, Cold Weather Operation (Bypass Indoors) Condenser Water Temperature When the ambient wet bulb temperature is lower than design, the entering condenser water temperature can be allowed to fall, improving chiller performance. As chillers are selected for lower kW per ton, the cooling tower fan motor power becomes a higher percentage of the peak load chiller power.
determined from the Daikin McQuay selection program. We recommend variable flow only in the evaporator because there is virtually no change in chiller efficiency compared to constant flow. In other words, there is no chiller energy penalty and considerable pumping energy can be saved. Although variable speed pumping can be done in the condenser loop, it is usually unwise. The intent of variable flow is to reduce pump horsepower.
Retrofit Knockdown It is estimated that fifty percent of retrofit applications require partial or complete disassembly of the chiller. Daikin McQuay offers two solutions to the disassembly and reassembly effort on Magnitude chillers. The unit is shipped without refrigerant, which must be furnished and charged by the contractor. Type IV reduces the height and weight of the unit. The width is determined by the evaporator tube sheet and is not decreased with this arrangement, nor is the overall unit length.
Pressure Drop Curves NOTE: The Evaporator and Condenser Model Codes are shown on page 27. The -B and -C designations shown on the curves refer to vessel tube count, which is determined by the computer selection program.
Figure 19, 2-Pass Evaporators WMC Evap - Water Side Pressure Drop (2 pass) 60 E2212-B E2212-C E2212-D 50 E2209-B E2209-C E2209-D 40 EPD - ft E2612-B E2609-B E3012-B 30 E3012-C 20 10 0 0 500 1000 1500 2000 EGPM - gpm Figure 20, 2-Pass Condensers WMC Cond - Water Side Pressure Drop (2 pass) 35.0 C2012-B C2012-C 30.0 C2009-B C2009-C 25.0 C2212-B CPD - ft C2212-C C2209-B 20.0 C2209-C C2612-B 15.0 C2612-C 10.0 5.0 0.
Figure 21, 3-Pass Evaporators WMC Evap - Water Side Pressure Drop (3 pass) 90 E2212-C E2212-D 80 E2209-C E2209-D 70 E2612-B E2609-B EPD - ft 60 E3012-C 50 40 30 20 10 0 0 200 400 600 800 1000 1200 EGPM - gpm Figure 22, 3-Pass Condensers WMC Cond - Water Side Pressure Drop (3 pass) 60.0 C2012-C C2009-C 50.0 C2212-C C2209-C CPD - ft 40.0 C2612-C 30.0 20.0 10.0 0.
Options and Accessories Vessels Marine water boxes Provides tube access for inspection, cleaning, and removal without dismantling water piping. Flanges (Victaulic connections are standard) ANSI raised face flanges on either the evaporator and/or condenser. Mating flanges are by others. Water side vessel construction of 300 psi (150 psi is standard) For high pressure water systems, typically high-rise building construction.
Seismic Certification Unit is OSHPD Pre-Approved and so labeled. (California only). Unit is certified to IBC 2009 and so labeled. Electrical Multi-point power connection Provides separate power connection to each compressor disconnect switch on two compressor units in lieu of standard single-point power. High short circuit current rating 65 kA (at 460 V) panel rating. (Standard is 35 kA). Harmonic filter Field-installed option. See page 39 for details. EMI filter Factory-installed option.
Refrigerant Recovery Units Although Daikin McQuay chillers can pump the entire refrigerant charge into the condenser and valve it off, there are occasions when pumpout units are required, due purely to specification requirements or unusual job considerations. Daikin McQuay offers two sizes of refrigerant recovery units (Model RRU) and one recovery unit that is factory mounted on a storage vessel (Model PRU). Recovery units are ETL listed. Capacities for R-22 are AHRI certified.
MODEL RRU570 Recovers at R-134a at 300 lb/min liquid and 5.7 lb/min vapor, ideal for the medium size chiller job. Rugged 3 hp open-drive compressor provides years of reliable service, even on refrigerants heavily contaminated with oil, air, moisture, or acids. Purging and switching from liquid to vapor recovery only involves turning 3-way valves-no switching of hoses is necessary. Suitable for most highpressure refrigerants and blends. Equipped with air-cooled condenser.
SPECIFICATIONS Sensitivity: As low as 1 PPM Range: 0 to 1000 PPM Weight: 25 lbs. (11 kg) Power: 120/240 Volt, 50/60 Hz Operating Environment: 32F-125F Size: W=16.5in. D=6.75in. H=15in.
Specifications SECTION 15XXX MAGNETIC BEARING CENTRIFUGAL CHILLERS PART 1 - GENERAL 1.1 SUMMARY A. Section includes design, performance criteria, refrigerants, controls, and installation requirements for water-cooled centrifugal chillers. 1.2 REFERENCES A. Comply with the following codes and standards: • • • • • • • AHRI 550/590 AHRI 575 NEC ANSI/ASHRAE 15 OSHA as adopted by the State ETL ASME Section VIII 1.3 SUBMITTALS A. Submittals shall include the following: 1.
and piping possible will remain on the vessel stack. The unit shall be shipped without refrigerant, which must be furnished and charged by the installing contractor. -- OR -A. (For Type V Knockdown) The unit shall be delivered to the job site completely assembled and charged with refrigerant (pumped down into condenser) and ready for field knockdown, as determined by the installing contractor. B. Comply with the manufacturer's instructions for rigging and transporting units.
common and the chiller shall be capable of running on one compressor with the other compressor or any of its auxiliaries inoperable or removed. B. Each chiller shall be factory run-tested under load conditions for a minimum of one hour on an AHRI qualified test stand with evaporator and condenser water flow at job conditions (excluding glycol applications). Operating controls shall be adjusted and checked. The refrigerant charge shall be adjusted for optimum operation and recorded on the unit nameplate.
contaminate the refrigerant and chiller system. If any portion of the chiller system is below atmospheric pressure during either operation or shut down, the manufacturer shall include, at no charge: 1. Purge System i. A complete purge system capable of removing non-condensables and moisture during operation and shut-down. The system shall consist of an air cooled condensing unit, purge condensing tank, pumpout compressor, and control system. ii.
2. The motor shall be of the semi-hermetic type, of sufficient size to efficiently fulfill compressor horsepower requirements. It shall be liquid refrigerant cooled with internal thermal sensing devices in the stator windings. The motor shall be compatible with variable frequency drive operation. 1. If unit contains an atmospheric shaft seal, the manufacturer shall provide the following at no additional charge: a.
a minimum of 200 psi. Provide intermediate tube supports at a maximum of 24 inch spacing. The heads shall be [carbon steel] OR [epoxy-coated steel]. Water connections shall be [grooved suitable for Victaulic couplings] OR [flanged connections]. The evaporator shall have [dished heads with valved drain and vent connections] OR [shall be equipped with marine water boxes with removable covers and vent and drain connections].
Cooler Piping Controls Tank Valves Heater 3. Manufacturer shall be responsible for covering all costs associated with annual oil and oil filter changes plus oil analysis as required D. Vibration Isolation 1. Provide neoprene waffle-type vibration isolators for each corner of the unit. E. Power Connections 1. Power connection shall be [single point to a factory-mounted disconnect switch] OR [multipoint to each compressor power panel on two-compressor units]. F. Chiller Control 1.
7. The chiller shall be capable of cycling and loading up to three other similar chillers through a local network and also automatic control of evaporator and condenser pumps (primary and standby), up to 3 stages of cooling tower fan cycling control and a tower modulating bypass valve or cooling tower fan variable frequency drives. 8.
5. IBC Certification: The chiller shall be certified to the following codes and standards; 2009 IBC, 2010 CBC, ICC-ES AC-156, ASCE 7-05. The chiller must be mounted to a rigid base and may use neoprene waffle vibration pads. PART 3 - EXECUTION 3.1 INSTALLATION A. Installing contractor to: 1. Install per manufacturer's requirements, shop drawings, and contract documents. 2. Adjust chiller alignment on foundations, or subbases as called for on drawings. 3.
This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.daikinmcquay.com. All Daikin McQuay equipment is sold pursuant to McQuay International’s Standard Terms and Conditions of Sale and Limited Product Warranty. Consult your local Daikin McQuay Representative for warranty details. Refer to form 933-430285Y-00-A. To find your local representative, go to www.daikinmcquay.
