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MC Power Energy Monitor 3000


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MC Power Energy Monitor 3000About MC Power Energy Monitor 3000
Here you can find all about MC Power Energy Monitor 3000 like manual and other informations. For example: review.

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Manual

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MC Power Energy Monitor 3000

 

 

User reviews and opinions

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Comments to date: 8. Page 1 of 1. Average Rating:
YuriyHoy 1:53am on Tuesday, September 21st, 2010 
Buy it for the monitor, mute the sound, blow off the webcam I bought this at Costco for the same price. Comparing a number of monitors. Good value, good monitor. For under $350, you get a 22" LCD with bright, crisp resolution. Huge difference over my old 19" viewsonic CRT. Very uneven backlighting When I first bought this monitor I was pleased at first.
nakfreeajer 4:13am on Tuesday, July 27th, 2010 
No Comment. No Comment. No Comment. Great quality and colors very vibrant. Good deal for great product. Great picture quality Shiny black finish...just a personal matter.
Deerpark 12:57am on Friday, July 2nd, 2010 
Mac users beware My family has purchased four ViewSonic monitors, and have been impressed with the quality. However.
rutnut 7:37am on Saturday, June 19th, 2010 
Very upscale display at a not to bad price, p...  Excellent Application that comes with the camera, 1.3 MP is best in the class. this is an awwwweeesomee monitor22" of awesom...  affordable, awesome features The webcam should have more megapixels
littlej 10:27am on Thursday, June 17th, 2010 
No USB ports, not really a con, I can do without them. Beautiful monitor. No dead/stuck pixels. Fast response time for gaming. 5ms with 2 ms GtG.
dafrabbit 12:51pm on Sunday, May 9th, 2010 
A very good all purpose monitor. Screen quality is very good. Committed technical support. Webcam integration is a great feature.
B-Twien 5:42pm on Monday, April 19th, 2010 
This is a great screen, i had the vx2025 and vx2235 before this and boy does this screen blow them away Very well designed, fast, bright. This is a great screen, i had the vx2025 and vx2235 before this and boy does this screen blow them away Very well designed, fast, bright. I have a Viewsonic VP1912b (pro model) that walks circles around this monitor.
mercierb 11:32pm on Thursday, March 18th, 2010 
No Comment. No Comment. No Comment. Great quality and colors very vibrant. Good deal for great product. Great picture quality Shiny black finish...just a personal matter.

Comments posted on www.ps2netdrivers.net are solely the views and opinions of the people posting them and do not necessarily reflect the views or opinions of us.

 

Documents

doc0

MC Power Series BOOSTCAP Ultracapacitors

Series: MC Power

Round, Terminal Type
Ultra low internal resistance Ultra low internal resistance Highest power performance available highest power performance available Lowest RC time constant lowest Rc time constant

Features:

2.7 Volt operating Voltage Ultra low internal resistance over 1 million duty cycles highest power performance available lowest Rc time constant Threaded terminal or weldable post versions

Applications:

hybrid drive trains automotive subsystems Transportation Rail system power

Overview:

The Power-type ultracapacitor product line gives customers in the automotive and transportation sector a much wider range of choices to meet their energy storage and power delivery requirements. The cells are specically engineered for hybrid vehicle drive trains, automotive subsystems and other heavy duty applications that require the lowest equivalent series resistance (ESR) and highest efciency available. In addition to meeting or exceeding demanding automotive and transportation application requirements for both watt-hours of energy storage and watts of power delivery per kilogram, all of these products will perform reliably for more than one million discharge-recharge cycles. The proprietary architecture and material science on which BOOSTCAP products are based enable continued leadership in controlling costs, exibility in product offerings and allow application specic performance tailoring. The cells operate at 2.7 volts, enabling them to store more energy and deliver more power per unit volume than any other commercially available ultracapacitor products.
| Page 1 | Doc. # 1009361 | Rev. 7 |
MC Power Series Specifications:
Operating Temperature Range Storage Temperature Range Rated Voltage Capacitance Tolerance Resistance Tolerance Temperature Characteristics Capacitance Change Internal Resistance Capacitance Change Internal Resistance Shelf Life

Performance

-40 C to +65 C -40 C to +70 C 2.7 V DC +20% / -5% Max. Within 5% of initial measured value at 25 C ( at -40 C) Within 150% of initial measured value at 25 C (at -40 C) Within 20% of initial specified value Within 60% of initial specified value
After 1500 hours application of rated voltage at 65 C Endurance
After 1500 hours storage at 65 C without load shall meet specification for endurance After 10 years at rated voltage and 25 C Capacitance Change Internal Resistance Within 30% of initial specified value Within 150% of initial specified value

Life Test

Cycle Test
Capacitors cycled between specified voltage and half rated voltage under constant current at 25 C (1 million) Capacitance Change Internal Resistance Within 30% of initial specified value Within 150% of initial specified value
MC Power Product Specifications:
Part Number BCAP0650 P270 BCAP1200 P270 BCAP1500 P270 BCAP2000 P270 BCAP3000 P270 Capacitance (F) 3000 ESR, DC (mohm) 0.80 0.58 0.47 0.35 0.29 ESR, 1khz (mohm) 0.60 0.44 0.35 0.26 0.24 Ic (mA) 1.5 2.7 3.0 4.2 5.2
MC Power Product Properties:
Maxwell Part No. BCAP0650 P270 BCAP1200 P270 BCAP1500 P270 BCAP2000 P270 BCAP3000 P270 Rth (C/W) 6.5 5.3 4.5 3.8 3.2 Isc (A) 4800 Emax (Wh/kg) 3.29 4.05 4.75 5.06 5.52 Pmax (W/kg) 15,100 13,800 16,200 17,500 13,800 Pd (W/kg) 5,400 5,000 5,800 6,200 5,400
| Page 2 | Doc. # 1009361 | Rev. 7 |

Dimensions:

H 25 L H

22.4.125

M12 X 1.75

Post Version

Part Number BCAP0650 P270 T04 BCAP1200 P270 T04 BCAP1500 P270 T04 BCAP2000 P270 T04 BCAP3000 P270 T04
Vol (I) 0.211 0.294 0.325 0.373 0.475
Mass (kg) 0.20 0.30 0.32 0.40 0.55
Size (mm) L 51.5 0.5 74.0 0.3 85.0 0.3 102.0 0.3 138.0 0.3

(0.5mm)

(0.2mm)

(0.7mm)

14.0 14.0 14.0 14.0 14.0

60.4 60.4 60.4 60.4 60.4

61.3 61.3 61.3 61.3 61.3
Product dimensions and specifications may change without notice. Please contact Maxwell Technologies directly for any technical specifications critical to application.
Mounting Recommendations:
Do not reverse polarity. Maximum torque for M12 screw terminals are 10Nm. Cells are designed to be connected into series or parallel strings. Clean terminals before mounting.
Worldwide Headquarters Maxwell Technologies 9244 Balboa Avenue San Diego, 92123 CA, USA PHONE: +(1) 3300 FAX: +(1) 3301 EMAIL: info@maxwell.com
European Office Maxwell Technologies SA CH-1728 Rossens Switzerland PHONE: +41 (0) FAX: +41 (0) EMAIL: info@maxwell.com

www.maxwell.com

| Page 3 | Doc. # 1009361 | Rev. 7 |

H 2X 14.0.L H

14.0.013

Weldable Version

14.0.013 D1
Part Number BCAP0650 P270 T05 BCAP1200 P270 T05 BCAP1500 P270 T05 BCAP2000 P270 T05 BCAP3000 P270 T05
Vol (I) 0.150 0.233 0.264 0.312 0.414

(0.125mm)

3.18 3.18 3.18 3.18 3.18

Markings:

Capacitors are marked with the following information - Rated capacitance and rated voltage as well as energy/power type indication in the product naming. Serial number, name of manufacturer, positive and negative terminal, warning marking. >
Additional Technical Information:
Capacitance and ESR, DC measured per document 1007239 Ic= Leakage current after 72 hours, 25C Rth = Thermal resistance Emax = CV x mass lsc = short circuit current (maximum peak current) 0.12V 2 Pd = R (DC) mass
V2 Pmax = 4R (1khz) mass Patent Pending
| Page 4 | Doc. # 1009361 | Rev. 7 |
Disclaimer of Warranty/Limitation of Liability for Uses in Life Support Devices or Critical Systems
Maxwell Technologies, Inc. and its Affiliates (Maxwell) provide no warranties of any kind either express or implied, including (without limitation) the implied warranties of merchantability and fitness, for uses of its products as components in life support devices or critical systems. Life support devices are devices or systems, which (a) are intended for surgical implant into a living body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with the instructions provided in the labeling can be reasonably expected to result in bodily injury to the user. An example of a life support device includes, but is not limited to, a heart pacemaker. A critical system is any system whose failure to perform can affect the safety or effectiveness of a higher level system, or cause bodily or property injury by loss of control of the higher level device or system. An example of a critical system includes, but is not limited to, aircraft avionics. Maxwell will not be liable to you for any loss or damages, either actual or consequential, indirect, punitive, special, or incidental, arising out of or relating to these terms.

Patent Pending

Worldwide Headquarters Maxwell Technologies 9244 Balboa Avenue San Diego, 92123 CA, USA PHONE: +(1) 3300 FAX: +(1) 3301 EMAIL: info@maxwell.com European Office Maxwell Technologies SA CH-1728 Rossens Switzerland PHONE: +41 (0) FAX: +41 (0) EMAIL: info@maxwell.com
| Page 5 | Doc. # 1009361 | Rev. 7 |

doc1

Evaporator

The units is supplied with new optimised counterflow evaporator single refrigerant pass that allows a perfect oil circulation and so a perfect oil return to the compressor. Counter Flow heat exchanger design takes advantage of the Glide characteristic intrinsic to HFC 407C.(see figure) It is direct expansion with refrigerant inside the tubes and water outside (shell side) with carbon steel tube sheets, with straight copper tubes that are spirally wound internally for higher efficiencies, expanded on the tube plates. The external shell, is linked with an electrical heater to prevent freezing up to -28 C ambient temperature, commanded by a thermostat and is covered with a closed cell insulation material. Each evaporator has 2 or 3 circuits, one for each compressor and is manufactured in accordance to PED approval. The evaporator water outlet connections are provided with Victaulic Kit

Chilled Water pump

As option unit can be provided with one or two pumps for the chilled water. The pump is unit mounted and connected to the electrical panel. The pump(s) are centrifugal type with stainless steel impeller. A diaphragm expansion tank with nitrogen charge is furnished. The terminal connection for water pumps discharge line is Victaulic type. Chiller with two pumps is provided with two shut-off valves on the connection pipes for an easy maintenance.

Condenser coils

The new McPower units are constructed with internally enhanced seamless copper tubes arranged in a staggered row pattern and mechanically expanded into McQuay lanced and rippled aluminium condenser fins with full fin collars. An integral subcooler circuit provides sub-cooling to effectively eliminate liquid flashing and increases in cooling capacity without increasing the power input.

Condenser coil fans

The condenser fans are helical type with wing-profile blades to achieve a better performance. The direct coupling with the electrical motor eliminates any problems with regard to the application of transmission devices reducing vibrations caused by the functioning. The three-phase type motors are supplied as standard with IP54 protection (Insulation class F); they are protected against overloading and short circuits by circuit breakers located inside the electrical control panel. With this new chiller line (McPower with HFC 407C ) McQuay International starts to use a different fan shape (see image on the right). The fans, with their blades, are installed immediately at the top of the condenser coils in a circular metal baseframe with metal grill. This allows noise reduction on the top side of the chiller and a better performance of the highest condenser tube rows for a consequent higher air velocity. The chiller height doesnt change thanks to a new condenser coil design.

508 B 04/01 A pag. 9/52

Fan Silent Mode - The microprocessor clock switches the fan at low speed according to the client setting (i.e. Night & Day), providing that the ambient temperature/condensing pressure is allowing the speed change. It allows a perfect condensing control down to 18C Speedtrol Continous fan speed modulation on the first fan of each circuit. It allows the unit working with air temperature down to 20C. Condenser coil guards - Metal protection guards fixed on all the external surface of the condenser coils. Evaporator area guards Metal protection guards around evaporator area. Cu-Cu condensing coils - To give better protection against corrosion by aggressive environments. Cu-Cu-Sn condensing coils - To give better protection against corrosion in aggressive environments and by salty air. Alucoat condensing coils - Fins are protected by a special acrylic paint with a high resistance to corrosion. 20mm thicked evaporator insulation Useful in really heavy operating conditions. Flow switch - Supplied separately to be wired and installed on the evaporator water piping (by the customer). Suction line shut off valve Suction shut-off valve installed on the suction port of the compressor to facilitate maintenance operation. Spreader bars - Facilitate the lifting of the units keeping the ropes away from the unit's casing. Rubber type antivibration mounts - Supplied separately. Ideal to reduce the vibrations when the unit is floor mounted. Witness tests - The units are normally tested at the test bench prior to the shipment. On request, a second test can be carried out, at customers presence, in accordance with the procedures indicated on the test form. (Not available for units with Glycol mixtures). Soft start Electronic starting device to reduce inrush current. An overload protection is included (no need of compressors thermal relays). Over / Under Voltage Phase monitor to control the minimum and maximum voltage value. Water circulation pump The pump is unit mounted. Hydronic kit consists of: one centrifugal pump direct driven, expansion tank, water feed circuit with pressure gauge, safety valve. The pump motor is protected by a circuit breaker installed in control panel. The kit is assembled and wired to the control panel. Two water circulation pumps Pumps units are unit mounted. Hydronic kit consists of: two centrifugal pumps direct driven, expansion tank, water feed circuit with pressure gauge, safety valve, check valves, shut-off valves. The pumps motors are protected by circuit breakers installed in control panel. The kit is assembled and wired to the control panel. Note: Spring type isolators (usually used with reciprocating chillers) are not recommended for the new ALS chiller because McQuay Frame 4 screw compressors do not generate low frequency vibrations.

Installation notes

Handling
Care should be taken to avoid rough handling or shock due to dropping the unit. Do not push or pull the unit from anything other than the base, and block the pushing vehicle away from the unit to prevent damage to the cabinet. Never allow the unit fall during unloading or moving as this may result in serious damage. To lift the unit, holes are provided in the base of the unit. Spreader bar and cables should be arranged to prevent damage to the condenser coil or unit cabinet.

Location

The ALS units are produced for outside installation on roofs, floors or below ground level on condition that the area is free from obstacles for the passage of the condenser air. The unit should be positioned on solid foundations and perfectly level; in the case of installation on roofs or floors, it may be advisable to arrange the use of suitable weight distribution beams. When the units are installed on the ground, a concrete base at least 250 mm wider and longer than the units footprint should be laid. Furthermore, this base should withstand the unit weight mentioned in the technical data table. When the units are positioned in areas which are easily accessible by persons or animals, it is advisable to fit guards to protect the condenser coil guards and, when necessary, also guards to protect the evaporator area.

508 B 04/01 A pag.10/52

Space requirements
The ALS units are air-cooled, hence it is important to observe the minimum distances which guarantee the best ventilation of the condenser coils. Limitations of space reducing the air flow could cause significant reductions in cooling capacity and an increase in electricity consumption. To determinate unit placement, careful consideration must be given to assure a sufficient air flow across the condenser heat transfer surface. Two conditions must be avoided to achieve the best performance: warm air recirculation and coil starvation. Both these conditions cause an increase of condensing pressures that results in reductions in unit efficiency and capacity. The ALS chiller performance is less affected in poor air flow situations because of its special condensing coil geometry. Moreover McQuays unique microprocessor has the ability to calculate the operating environment of the chiller and the capacity to optimize its performance staying on-line during abnormal conditions. Each side of the unit must be accessible after installation for periodic service. Fig.1 shows you minimum recommended clearance requirements. Vertical condenser air discharge must be unobstructed because the unit would have its capacity and efficiency significantly reduced. If the units are positioned in places surrounded by walls or obstacles of the same height as the units, the units should be at least 2500 mm from obstacles (fig.2). In the event the obstacles are higher than the units, the units should be at least 3000 mm from the obstacle (fig.4). Units installed closer than the minimun recommended distance to a wall or other vertical riser may experience a combination of coil starvation and warm air recirculation, thus causing reduction in unit capacity and efficienty reductions. Once again, the microprocessor will allow the chiller to stay on line, producing the maximum available capacity, even at less than recommended lateral clearances. When two or more units are positioned side by side it is recommended that the condenser coils are at least 3600 mm distance from one another (fig.3); stong wind could be the cause of air warm recirculation. For other installation solutions, consult McQuay technicians.

2530 418.3 1453,5 519,3 2,12,5 28/800 157,/ 432 10,5 273
2530 445.3 1548,3 555,2 2,12,5 28/800 154,/ 419 10,5 273
2530 464.3 1613,5 586,5 2,12,5 29/800 160,/ 419 10,5 273
2530 478.3 1678,7 617,8 2,12,5 30/800 165,/ 419 10,5 273

508 B 04/01 A pag.20/52

Electrical data McPower XE ST and XE CN with HFC 407C

255.562 395.869

276.2 300.V 3f 50 Hz 418.3 445.V 3f 50 Hz 925 1076

320.924 464.1227

340.765 478.1386

1305 817

508 B 04/01 A pag. 21/52
Physical data McPower XE LN and XE XN with HFC 407C
228.2 794,4 311,5 2,12,5 16/1,800 64,/ 271 10,5 219
255.2 884,9 346,9 2,12,5 17/1,800 68,/ 256 10,5 219
276.2 952,5 378,6 2,12,5 18/1,800 72,/ 256 10,5 219
300.2 1038,5 418,0 2,12,5 19/1,800 76,/ 270 10,5 219
320.2 1104,2 453,6 2,12,5 20/1,800 80,/ 270 10,5 219
340.3 1167,1 463,4 2,12,5 24/1,800 96,/ 278 10,5 219
2530 374.3 1261,4 499,0 2,12,5 25/1,800 100,/ 432 10,5 273
2530 395.3 1325,8 529,9 2,12,5 26/1,800 104,/ 432 10,5 273
2530 418.3 1394,0 558,2 2,12,5 28/1,800 115,/ 432 10,5 273
2530 445.3 1478,2 600,3 2,12,5 28/1,1 / 419 10,5 273
2530 464.3 1525.7 644,1 2,12,5 28/1,1 / 419 10,5 273
2530 478.3 1601,3 669,6 2,12,5 30/1,1 / 419 10,5 273

508 B 04/01 A pag.22/52

Electrical data McPower XE LN and XE XN with HFC 407C

255.533 395.825

276.583 418.877

300.737 445.1028

320.890 464.1182

340.724 478.1335

400 V 3f 50 Hz
400 V 3f 50 Hz A A A A A A

1283 775

508 B 04/01 A pag. 23/52
Physical data McPower XE XXN HFC 407C
McPower unit size Cooling capacity (1) Power input (1) COP McQuay singlescrew compressors Refrigerant circuits Oil charge Min % of capacity reduction Condenser fans N of fans / Nominal power fan Fan speed Diameter Total air flow Evaporator Evaporator / Water volume Max operating pressure Water connections diameter Condenser coil Coil type Weight and dimension Standard unit shipping weight Standard unit operating weight Unit length Unit width Unit height McPower unit size Cooling capacity (1) Power input (1) COP McQuay singlescrew compressors Refrigerant circuits Oil charge Min % of capacity reduction Condenser fans N of fans / Nominal power fan Fan speed Diameter Total air flow Evaporator Evaporator / Water volume Max operating pressure Water connections diameter Condenser coil Coil type Weight and dimension Standard unit shipping weight Standard unit operating weight Unit length Unit width Unit height kW kW N N l % kW rpm mm m3/s N/l bar mm

The power input is for compressor only; cooling cap. and power input referred to evap. fouling factor=0,0176m2 C/kW.

508 B 04/01 A pag.28/52

Standard ratings McPower SE 418.3 478.3 ST, CN
1416,9 1456,6 1496,7 1537,3 1578,4 1619,9 1508,5 1550,9 1593,8 1637,2 1681,0 1725,4 1574,9 1618,9 1663,5 1708,5 1754,1 1800,0 1641,3 1687,0 1733,1 1779,9 1827,0 1874,6
447,3 453,9 460,6 467,5 474,6 481,9 479,1 486,3 493,7 501,3 509,1 517,1 504,5 512,1 519,8 527,7 535,8 544,1 530,0 537,8 545,8 554,0 562,5 571,1
1347,0 1385,3 1423,9 1463,0 1502,5 1542,5 1433,0 1473,7 1515,0 1556,8 1598,9 1641,5 1496,3 1538,7 1581,6 1624,8 1668,7 1712,9 1559,8 1603,7 1648,1 1693,0 1738,4 1784,3
492,9 499,5 506,3 513,2 520,4 527,8 527,6 534,8 542,2 549,9 557,7 565,8 555,9 563,4 571,2 579,1 587,3 595,7 584,3 592,1 600,1 608,4 616,9 625,7
1273,4 1310,1 1347,2 1384,8 1422,7 1461,0 1353,4 1392,5 1432,1 1472,1 1512,5 1553,4 1413,6 1454,2 1495,4 1536,9 1578,9 1621,3 1473,7 1515,9 1558,5 1601,7 1645,2 1689,2
544,4 550,9 557,6 564,5 571,6 578,9 582,2 589,3 596,7 604,3 612,1 620,1 613,9 621,3 628,9 636,8 645,0 653,3 645,5 653,2 661,2 669,4 677,9 686,6
1195,6 1230,7 1266,2 1302,1 1338,4 1375,1 1269,4 1306,8 1344,6 1382,8 1421,4 1460,4 1326,1 1364,9 1404,2 1443,9 1484,0 1524,5 1382,7 1423,1 1463,8 1505,0 1546,7 1588,7
602,4 608,6 615,1 621,9 628,9 636,1 643,8 650,7 657,8 665,2 672,9 680,8 679,2 686,3 693,8 701,5 709,5 717,7 714,5 722,0 729,7 737,8 746,1 754,6
1163,2 1197,7 1232,5 1267,7 1303,4 1339,3 1234,4 1271,1 1308,2 1345,7 1383,6 1421,8 1289,6 1327,7 1366,2 1405,2 1444,6 1484,4 1344,8 1384,4 1424,3 1464,8 1505,6 1546,9
627,6 633,7 640,1 646,7 653,6 660,7 670,5 677,3 684,3 691,6 699,1 706,9 707,5 714,6 721,9 729,5 737,3 745,5 744,5 751,8 759,5 767,4 775,6 784,0

508 B 04/01 A pag. 29/52

Standard ratings McPower SE 228.2 395.3 LN, XN
Potenza frigorifera (kW) Potenza assorbita (kW) Potenza frigorifera (kW)
Potenza assorbita (kW) Potenza frigorifera (kW)

Potenza assorbita (kW)

748,7 769,2 789,9 810,7 831,8 853,0 828,3 850,9 873,7 896,7 919,9 943,3 893,3 917,4 941,8 966,3 991,0 1016,1 971,1 997,3 1023,7 1050,4 1077,3 1104,4 1033,5 1061,3 1089,2 1117,4 1145,9 1174,5 1097,9 1127,5 1157,5 1187,8 1218,3 1249,1 1215,4 1248,8 1282,4 1316,5 1350,8 1385,5 1281,1 1316,0 1351,2 1386,7 1422,6 1458,8
273,9 277,9 281,9 286,1 290,5 294,9 302,3 306,9 311,6 316,5 321,6 326,7 327,8 332,9 338,2 343,6 349,1 354,8 359,2 364,8 370,7 376,6 382,8 389,0 387,3 393,3 399,5 405,9 412,4 419,1 406,1 411,8 417,5 423,5 429,7 436,0 441,8 448,5 455,4 462,6 470,0 477,5 467,5 474,7 482,2 489,8 497,7 505,8
708,2 727,9 747,7 767,7 787,8 808,2 783,3 804,9 826,7 848,8 871,1 893,5 845,3 868,4 891,7 915,2 939,0 962,9 918,3 943,4 968,7 994,3 1020,1 1046,0 977,8 1004,2 1031,0 1058,0 1085,2 1112,6 1039,6 1068,1 1096,9 1125,9 1155,2 1184,8 1148,9 1180,9 1213,1 1245,7 1278,5 1311,5 1211,4 1244,9 1278,7 1312,7 1347,0 1381,6

286,3 289,5 292,7 296,1 299,6 303,3 311,1 315,0 318,9 323,0 327,2 331,6 334,2 338,5 343,0 347,6 352,5 357,4 366,2 371,0 376,0 381,2 386,5 391,9 395,9 401,2 406,5 411,9 417,6 423,4 426,3 430,8 435,5 440,3 445,3 450,5

Note: Note:

The power input is for compressor only; cooling cap. and power input referred to evap. fouling factor=0,0176m2 C/kW. Shaded area reflects Microtech II C Plus control algorithms

508 B 04/01 A pag.32/52

Standard ratings McPower SE 374.3 478.3 XXN
1169,9 1201,2 1232,7 1264,5 1296,4 1328,6 1233,1299 1332,2 1365,7 1399,3 1308,6 1343,3 1378,3 1413,1484,8 1379,1452,8 1489,7 1526,9 1564,3 1440,6 1478,5 1516,1593,6 1632,5 1501,7 1540,9 1580,4 1620,3 1660,3 1700,7
473,9 481,4 489,505,2 513,5 500,8 508,8 517,1 525,6 534,3 543,3 519,5 527,9 536,5 545,4 554,5 563,8 563,8 573,2 582,8 592,7 602,8 613,2 594,5 604,3 614,3 624,7 635,3 646,1 625,2 635,4 645,9 656,7 667,7 679
1101,3 1131,1 1161,2 1191,5 1221,9 1252,6 1161,7 1192,8 1224,2 1255,9 1287,8 1319,8 1234,2 1267,4 1300,8 1334,4 1368,3 1402,3 1298,9 1333,7 1368,6 1403,8 1439,2 1474,8 1356,5 1392,5 1428,9 1465,4 1502,1 1539,2 1414,1 1451,5 1489,1 1527,1 1565,2 1603,6
525,5 532,9 540,5 548,3 556,4 564,8 553,9 561,9 570,2 578,6 587,4 596,3 573,2 581,6 590,3 599,2 608,3 617,7 621,7 631,1 640,7 650,6 660,8 671,665,8 675,8 686,2 696,8 707,8 690,2 700,721,8 732,9 744,3
1028,4 1056,7 1085,2 1113,9 1142,1085,5 1115,1175 1205,2 1235,6 1155,1218,7 1250,7 1282,9 1315,2 1213,5 1246,4 1279,5 1312,9 1346,4 1380,1 1267,3 1301,1370,6 1405,4 1440,5 1321,1 1356,6 1392,3 1428,3 1464,5 1500,9
584,6 591,606,5 614,4 622,5 614,630 638,3 646,9 655,7 633,650,6 659,4 668,4 677,7 686,9 696,1 705,6 715,4 725,5 735,8 725,2 734,9 744,8 755,1 765,6 776,5 763,6 773,794,7 805,7 817,1
781,6 803,1 824,8 846,6 868,6 890,7 825,0 847,5 870,2 893,0 916,0 939,1 878,3 902,1 926,2 950,5 975,0 999,6 922,3 947,3 972,4 997,8 1023,3 1048,9 963,1 989,1 1015,4 1041,7 1068,1 1094,8 1004,0 1031,0 1058,1 1085,5 1113,0 1140,7
514,4 520,6 527,1 533,7 540,7 547,8 540,5 547,4 554,4 561,7 569,3 577,0 557,7 565,0 572,5 580,3 588,2 596,4 604,5 612,6 620,9 629,6 638,4 647,5 638,2 646,7 655,4 664,5 673,7 683,3 672,0 680,8 689,9 699,3 709,0 719,0
617,0 634,0 651,1 668,3 685,7 703,2 651,3 669,1 687,0 705,0 723,1 741,4 693,4 712,2 731,2 750,4 769,7 789,1 728,1 747,8 767,7 787,7 807,8 828,1 760,4 780,9 801,6 822,4 843,2 864,3 792,7 814,0 835,4 857,0 878,7 900,5
456,0 461,4 467,2 473,1 479,2 485,6 479,1 485,2 491,4 497,9 504,6 511,4 494,3 500,8 507,5 514,3 521,4 528,6 535,8 543,0 550,4 558,0 565,9 573,9 565,7 573,2 580,9 589,0 597,2 605,7 595,6 603,4 611,5 619,9 628,4 637,3

716,1 738,2 760,5 783,2 806,2 829,5 798,8 823,5 848,6 874,1 899,9 926,0 861,7 888,0 914,7 941,9 969,3 997,1 940,6 969,5 998,8 1028,6 1058,7 1089,2 1001,6 1032,1 1063,0 1094,5 1126,2 1158,4 1052,6 1084,7 1117,1 1150,0 1183,4 1217,2 1138,7 1173,5 1208,9 1244,7 1281,0 1317,7 1198,5 1234,8 1271,7 1309,0 1346,8 1385,2
311,4 313,9 316,5 319,3 322,3 325,3 343,6 346,8 350,3 353,8 357,6 361,4 373,5 377,3 381,3 385,4 389,7 394,1 410,7 415,0 419,5 424,2 429,1 434,1 445,2 449,9 454,7 459,8 465,0 470,4 464,8 468,3 472,0 475,9 480,1 484,4 496,9 501,2 505,8 510,5 515,5 520,6 526,1 531,0 536,0 541,3 546,8 552,5
670,4 691,5 713,0 734,7 756,7 779,0 746,9 770,6 794,6 818,9 843,6 868,5 806,1 831,3 856,8 882,7 909,0 935,6 878,8 906,4 934,4 962,7 991,5 1020,6 935,8 964,9 994,4 1024,4 1054,7 1085,4 986,5 1017,2 1048,4 1079,9 1111,9 1144,3 1066,1 1099,5 1133,3 1167,7 1202,4 1237,6 1122,5 1157,3 1192,6 1228,4 1264,6 1301,4
348,0 350,2 352,5 354,9 357,5 360,3 381,4 384,4 387,5 390,9 394,3 398,0 413,0 416,7 420,4 424,4 428,5 432,7 453,8 457,9 462,2 466,7 471,4 476,2 492,3 496,7 501,3 506,2 511,2 516,4 520,2 523,2 526,4 529,9 533,5 537,4 553,4 557,3 561,4 565,7 570,3 575,1 584,4 588,8 593,5 598,5 603,6 609,0
660,9 681,8 703,1 724,6 746,5 768,6 736,2 759,7 783,5 807,5 832,0 856,7 794,6 819,6 844,9 870,5 896,5 922,9 866,0 893,4 921,1 949,1 977,7 1006,5 922,1 951,0 980,3 1009,9 1039,9 1070,3 972,7 1003,3 1034,1 1065,4 1097,1 1129,3 1051,1 1084,2 1117,7 1151,8 1186,2 1221,0 1106,8 1141,3 1176,2 1211,7 1247,6 1284,0
356,0 358,0 360,2 362,6 365,2 367,9 389,6 392,5 395,6 398,8 402,2 405,8 421,5 425,1 428,8 432,7 436,8 441,0 463,1 467,1 471,4 475,8 480,4 485,2 502,4 506,8 511,3 516,1 521,0 526,2 532,3 535,1 538,2 541,5 545,1 548,9 565,7 569,4 573,4 577,6 582,1 586,8 596,9 601,3 605,9 610,7 615,8 621,1

508 B 04/01 A pag.34/52

Standard ratings McPower XE 418.3 478.3 ST, CN
1472,9 1515,2 1558,0 1601,5 1645,4 1689,9 1570,7 1616,0 1661,9 1708,5 1755,6 1803,3 1623,7 1670,0 1716,8 1764,3 1812,4 1861,0 1704,0 1752,5 1801,7 1851,4 1901,9 1952,9
413,0 418,6 424,5 430,4 436,5 442,8 441,8 448,0 454,4 460,9 467,6 474,5 475,3 482,0 489,0 496,0 503,3 510,8 490,8 497,6 504,5 511,7 519,0 526,5
1405,0 1445,9 1487,3 1529,3 1571,8 1614,9 1497,2 1541,0 1585,4 1630,3 1675,9 1721,9 1546,7 1591,4 1636,7 1682,6 1728,9 1775,9 1624,7 1671,6 1719,1 1767,2 1815,9 1865,2
454,8 460,5 466,3 472,3 478,5 484,8 486,2 492,4 498,8 505,4 512,2 519,1 523,5 530,3 537,2 544,3 551,7 559,2 540,7 547,5 554,5 561,7 569,1 576,7

1354,8 1393,4 1432,4 1471,9 1511,8 1552,2 1438,1 1479,1 1520,6 1562,6 1605,1 1647,9 1498,7 1541,2 1584,2 1627,7 1671,6 1715,9 1559,5 1603,4 1647,8 1692,7 1738,1 1784,0
487,7 494,1 500,8 507,6 514,6 521,8 524,3 531,4 538,8 546,3 554,1 562,1 554,4 561,9 569,6 577,5 585,6 594,0 584,4 592,3 600,3 608,6 617,1 625,9
1281,6 1318,6 1356,1 1394,0 1432,4 1471,1 1358,8 1398,1 1437,9 1478,2 1518,9 1560,1 1416,1 1456,8 1498,1 1539,8 1581,9 1624,5 1473,4 1515,6 1558,2 1601,3 1644,8 1688,9
538,5 544,9 551,5 558,2 565,2 572,4 578,6 585,6 592,9 600,3 608,1 616,0 612,1 619,5 627,1 635,0 643,1 651,4 645,7 653,4 661,4 669,6 678,1 686,8
1204,2 1239,7 1275,6 1311,8 1348,5 1385,5 1275,0 1312,6 1350,6 1389,1 1428,0 1467,3 1328,7 1367,6 1407,1 1446,9 1487,1 1527,8 1382,4 1422,7 1463,4 1504,7 1546,3 1588,3
595,9 602,0 608,4 615,0 621,8 628,9 639,7 646,5 653,6 660,9 668,5 676,3 677,2 684,4 691,8 699,4 707,4 715,6 714,8 722,2 730,0 738,0 746,3 754,9
1172,0 1206,8 1242,0 1277,6 1313,6 1350,0 1240,0 1277,0 1314,4 1352,1 1390,2 1428,8 1292,3 1330,5 1369,2 1408,2 1447,7 1487,7 1344,5 1384,0 1424,0 1464,4 1505,2 1546,5
620,8 626,8 633,1 639,6 646,3 653,3 666,3 672,9 679,9 687,1 694,6 702,3 705,5 712,5 719,8 727,4 735,2 743,3 744,8 752,1 759,7 767,6 775,8 784,3

508 B 04/01 A pag. 37/52

Standard ratings McPower XE 228.2 395.3 XXN
790,4 812,7 835,3 858,2 881,2 904,6 880,5 905,4 930,6 956,1 981,9 1008,0 948,0 974,5 1001,2 1028,4 1055,7 1083,4 1033,9 1062,9 1092,2 1121,8 1151,7 1181,8 1099,6 1130,1 1161,0 1192,1 1223,7 1255,4 1161,2 1193,6 1226,4 1259,5 1293,1 1327,0 1255,2 1290,4 1326,0 1362,0 1398,4 1435,1 1319,3 1356,0 1393,1 1430,6 1468,4 1506,6
258,3 262,0 265,8 269,8 273,8 278,0 289,6 294,1 298,8 303,5 308,4 313,5 317,3 322,3 327,5 332,8 338,2 343,8 351,0 356,7 362,6 368,6 374,8 381,2 380,9 387,0 393,4 399,9 406,6 413,4 383,5 388,8 394,2 399,9 405,7 411,6 415,1 421,2 427,5 434,0 440,7 447,6 441,9 448,5 455,3 462,3 469,5 476,9
749,5 771,1 792,7 814,7 836,8 859,3 834,0 857,9 882,1 906,6 931,2 956,2 898,0 923,4 949,1 975,1 1001,3 1027,8 978,3 1006,1 1034,1 1062,4 1091,1 1119,9 1040,3 1069,6 1099,1 1129,0 1159,1 1189,4 1102,2 1133,4 1165,1 1197,0 1229,2 1261,8 1190,3 1224,1 1258,3 1292,9 1327,8 1363,1 1251,3 1286,5 1322,2 1358,2 1394,5 1431,2
286,5 290,1 293,8 297,7 301,7 305,9 319,4 323,9 328,5 333,2 338,1 343,2 349,0 354,0 359,2 364,5 370,0 375,7 385,8 391,5 397,4 403,4 409,7 416,1 418,9 425,1 431,4 438,0 444,7 451,6 426,1 431,2 436,6 442,1 447,8 453,8 459,3 465,3 471,5 478,0 484,6 491,5 488,0 494,6 501,4 508,4 515,6 523,0
706,5 727,0 747,8 768,8 790,1 811,5 785,0 807,9 831,0 854,4 877,9 901,8 845,5 869,8 894,3 919,2 944,2 969,5 919,9 946,2 973,0 1000,1 1027,3 1054,8 978,0 1005,9 1034,0 1062,4 1091,2 1120,1 1039,8 1069,8 1100,1 1130,7 1161,7 1192,9 1121,8 1154,2 1186,9 1220,1 1253,4 1287,2 1179,5 1213,3 1247,3 1281,8 1316,6 1351,7

508 B 04/01 A pag.40/52

Water Pump Diagram
Note: to have the useful hydraulic lift is necessary to subtract the evaporator pressure drop to the total hydraulic lift
Unit size 228.2 255.2 276.2 300.2 320.2 340.2 374.3 395.3 418.3 445.3 464.3 478.3

SE ST / CN

SE LN / XN

SE XXN

XE ST / CN

XE LN / XN

XE XXN

Type pump

A A B B C C C C D D E E

A A A B B C C C C D D D

A B B C C C C D D E E E

A A B C C C C C D D E E

A A B B C C C C D D D E
Note: Victaulic kit for the water pump(s) discharge line is furnished.

508 B 04/01 A pag. 41/52

Partial Heat Recovery Ratings McPower 228.2478.3

A4LS Unit Size

LEAVING DESUPERHEATERS WATER TEMPERATURE C 55
Heating capacity (kW) Heating capacity (kW) Heating capacity (kW)

342 360

271 285

197 207

Partial Heat Recovery Exchanger (Plate Exchanger) Pressure Drop

508 B 04/01 A pag.42/52

Leaving chilled water temperature 7C T 5C Air temperature 35 C
Total Heat Recovery Ratings McPower 228.2395.3
Heat recovery leaving water temperature - C
Total Heat Recovery duty [kW]

Unit A4LS

1033,4 1058,9 1084,1137,7 1164,6 1144,4 1172,7 1201,7 1230,9 1260,6 1290,6 1236,1 1266,6 1297,6 1328,8 1360,6 1392,8 1347,2 1380,5 1414,3 1448,5 1483,3 1518,3 1437,9 1473,1 1508,7 1544,9 1581,5 1618,7 1517,3 1554,1 1591,4 1629,1 1667,4 1706,1720 1762,6 1805,8 1849,1770,6 1814,7 1859,4 1904,7 1950,6 1997,2
1021,9 1046,6 1071,1122,6 1148,7 1129,9 1157,5 1185,4 1213,7 1242,4 1271,5 1220,5 1250,1 1280,1 1310,4 1341,2 1372,3 1329,8 1362,2 1394,8 1427,9 1461,6 1495,6 1420,6 1454,6 1489,2 1524,3 1559,7 1595,1538,4 1574,1648,1 1685,7 1656,3 1696,1779,8 1822,3 1865,2 1747,7 1790,3 1833,6 1877,4 1921,9 1967
1012,5 1036,1084,4 1109,1 1134,2 1117,3 1143,6 1170,5 1197,7 1225,4 1253,4 1206,3 1234,8 1263,1322,8 1352,1345 1376,6 1408,1473,9 1404,8 1437,8 1471,1 1504,9 1539,1 1573,9 1491,6 1525,7 1560,4 1595,5 1631,1 1667,3 1637,4 1676,1 1715,7 1755,9 1796,1727,1 1768,2 1809,1894,8 1938,3
1005,1 1027,6 1050,4 1073,7 1097,2 1121,2 1106,3 1131,7 1157,2 1183,3 1209,7 1236,5 1193,7 1221,1 1248,1305,4 1334,4 1299,9 1329,6 1359,8 1390,5 1421,6 1453,1422,6 1454,1519,8 1553,3 1483,9 1516,4 1549,2 1582,8 1616,9 1651,4 1621,1 1658,1734,3 1773,3 1812,8 1709,3 1748,4 1788,3 1828,6 1869,6 1911,4

508 B 04/01 A pag. 43/52

Total Heat Recovery Ratings McPower 418.3478.3

1864,2 1910,5 1957,3 2004,2101,8 1987,6 2037,2 2087,5 2138,5 2190,1 2242,5 2079,2183,3 2236,2 2289,9 2344,1 2171,3 2224,8 2278,9 2333,9 2389,5 2445,7
1839,9 1884,8 1930,2 1976,2 2022,9 2070,3 1960,6 2008,5 2057,2 2106,7 2156,6 2207,3 2052,2 2102,1 2152,8 2203,2308,6 2144,1 2195,8 2248,2 2301,4 2355,3 2410
1817,1904,8 1949,3 1994,3 2039,9 1935,6 1981,8 2028,8 2076,4 2124,6 2173,5 2027,5 2075,5 2124,3 2173,7 2223,9 2274,6 2119,2 2169,1 2219,7 2271,1 2323,1 2375,8
1798 1839,3 1881,1967,3 2011,2 1913,2 1957,5 2002,2094,3 2141,2 2005,3 2051,2145,4 2193,5 2242,2 2097,2 2145,1 2193,5 2242,8 2292,8 2343,3

508 B 04/01 A pag.44/52

Total Heat Recovery Exchanger Pressure Drop McPower 228.2478.3

508 B 04/01 A pag. 45/52

Dimensions
McPower SE, XE 228.2 320.2 ST, CN, LN, XN, XXN

McPower SE Units

ST-CN-LN-XN-XXN A4LS SE 228.2 A4LS SE 255.2 276.2 A4LS SE 300.2 320.2

Length A (mm)

McPower XE Units
ST-CN-LN-XN-XXN A4LS XE 228.2 A4LS XE 255.2 - 276.2 A4LS XE 300.2 - 320.2
Dimensions McPower SE, XE 340.3 478.3 ST, CN, LN, XN, XXN
ST-CN-LN-XN-XXN A4LS SE 340.3 A4LS SE 374.3 395.3 A4LS SE 418.3 445.3 A4LS SE 464.3 478.3

10970 11870

ST-CN-LN-XN-XXN A4LS XE 340.3 A4LS XE 374.3 395.3 A4LS XE 418.3 445.3 464.3 A4LS XE 478.3

13670 14570

508 B 04/01 A pag.46/52
Technical Specification Air Cooled Screw Chiller McPower 228.2478.3
To supply and install, where specified in the project n. unit(s) air cooled water chiller with cooling capacity of. kW, to cool. l/sec. of water from. C to. C working with. C ambient temperature. The unit should work with electricity at. V, 3ph, 50Hz. The electrical power absorbed should not exceed. kW. The units COP will be at least. at the working conditions of the project. Part load COP will be at least. at the working conditions of the project. The units will have 2 or 3 independent refrigerant circuits, and the respective electronic microprocessor will allow the starting of the compressors. Each chiller will be factory assembled on a robust baseframe made of zinc coated steel, protected by an epoxy paint. The unit will be tested at full load in the factory at the nominal working conditions and water temperatures. Before shipment a full test will be held to avoid any losses. Chiller will be delivered to the job site completely assembled and charged with refrigerant and oil. Comply with the manufacturer instructions for rigging and handling equipment. GENERAL All units should be designed and manufactured in accordance with applicable selections of the following which are equivalent to American Air-conditioning industry applicable codes: Rating of chillers Construction of pressure vessel Electrical codes Safety Codes Manufacturing Quality Stds REFRIGERANT Will be accepted HFC 407C or equivalent refrigerant. UNIT DESCRIPTION Each chiller consist of multiple semi-hermetic rotary screw compressor, direct expansion avaporator, aircooled condenser section, control system and all components necessary for safe and controlled unit operation. NOISE LEVEL AND VIBRATIONS Sound pressure level at 1 meter distance in free field, semispheric conditions, shall not exceed dBA. The sound pressure levels must be rated in accordance to ISO 3744. Other types of rating unacceptable. Vibration level should not exceed 2 mm/s. DIMENSIONS Unit length shall not exceed. mm, unit width shall not exceed. mm, unit height shall not exceed. mm. CHILLER COMPONENTS Compressors The compressors shall be field serviceable, semi-hermetic, single-screw type with one main helical rotor meshing with two opposed gaterotor. Twin-screw compressor will no accepted because of the large bearing loads inherent with this design. For a Single-screw compressor the two exactly opposed gaterotors create two exactly opposed compression cycles which results in balanced forces acting on the rotor compressor. The gaterotors will be constructed of a carbon impregnated engineered composite material. The gaterotor supports will be constructed of cast iron. The oil injection shall be used for these compressors in order to get high COP also at high condensing pressure and low sound pressure levels in each load condition. EN 12055 TUV Standards (on request) IEC 204-1 CEI 44-5 Elect. & Safety Codes CEI-EN 602041 Codes ISO 9001

508 B 04/01 A pag. 47/52

Refrigerant system differential pressure shall provide oil flow throught service replaceble, 0.5 micron, full flow, cartridge type oil filter internal to compressor. Filter bypass or oil pump not acceptable. The compressors oil cooling must be realized by liquid injection. External dedicated heat exchanger and additional piping to carry the oil from the compressor to heat exchanger and viceversa will be not accepted. The compressor shall be provided with a high efficiency, oil separator and with built-in oil filter. The compressor shall be direct electrical drive, without gear transmission between the screw and the electrical motor. The motors compressor shall be designed for star/delta. Soft start should be available as option. The compressor casing shall be provided with ports to realize economized refrigerant cycles. Shall be present two thermal protection realized by a thermistor for high temperature protection to motor and a thermistor for discharge gas high temperature protection. The compressor shall be provided with an automatic spring return of capacity control valve to the minimum load position to ensure compressor starting always at minimum motor load so with the minimum mechanical stress. Evaporator The units shall be supplied with shell and tubes counter-flow evaporator single refrigerant pass. It will be direct expansion with refrigerant inside the tubes and water outside (shell side) with carbon steel tube sheets, with straight copper tubes that are spirally wound internally for higher efficiencies, expanded on the tube plates. The external shell, shall be linked with an electrical heater to prevent freezing up to -28 C ambient temperature, commanded by a thermostat and shall be insulated with flexible, closed cell polyurethane insulation material. The evaporator will have 2 or 3 circuits, one for each compressor and shall be single refrigerant pass to ensure a simplier oil circulation so to ensure always a perfect oil return to the compressor. If a plate to plate heat exchanger is used, the manufacturer shall provide to furniture an adequate buffer tank to avoid frequently compressors star-stop and to allow a good evaporator leaving water temperature control. The manufacturer also shall provide to furniture a feed water line filter, a monitoring system of the refrigerant pressure drop inside the plat to plate heat exchanger and a system to protect the component from hydraulic pressure waves caused by water circulation pump stop. Evaporator is manufactured in accordance to PED approval. Condenser coil The condenser coils are constructed with internally enchanced seamless copper tubes having a "W" configuration and arranged in a staggered row pattern and mechanically expanded into lanced and rippled aluminium fins with full fin collars for higher efficiencies. The space between the fins are given by a collar that will increase the surface area in connection with the tubes, protecting them from ambient corrosion. The coils will have an integral subcooler circuit which provides sufficient subcooling to effectively eliminate the possibility of liquid flashing and increase the unit's efficiency of 5-7% without an increase in power absorbed, and the surface area will be designed in order to have an air velocity not higher than 2.8 m/sec. Condenser fans The fans used in conjunction with the condenser coils, shall be helical type with aerofoil blades for higher efficiencies and lower noise. Each fan shall be equipped with a heavy-gauge fan guard. The air discharge shall be vertical and each fan must be coupled to the electrical motor, supplied as standard to IP54 and capable to work to ambient temperatures of -40 C to +55 C. There is also an accident protection within the motors.

508 B 04/01 A pag.48/52

Refrigerant circuit The unit must have refrigerant circuits completely independent of each other with one compressor per circuit. Each circuit shall include an: electronic expansion valve, compressor discharge shut-off valve, a liquid line shut-off valve with charging connection, replaceable core filter-drier, sight glass with moisture indicator and insulated suction line. Suction line shut-off valve should be available as option. Regulation of cooling capacity Each unit will have a microprocessor for the control of compressor slide valves position (2 slide valves, one for each compressors cycles). The slides shall have a stepless motion that allows a units operation with infinitely variable capacity control down to 12,5% (2 compressors) or down to 8,3% (3 compressors) of the cooling capacity. The chiller shall be capable of stable operation to a minimum of 12,5% (2 compressors) or 8,3% (3 compressors) of full load without hot gas bypass. Step unloading unacceptable because of evaporator leaving water temperature fluctuation and low compressors efficiency at partial load. The system shall stage the unit based on the leaving water temperature. Electronic expansion valve Electronic expansion valve allows a simple and perfect control system that quickly interacts at load variations. This valve combines two functions: liquid solenoid and electronic expansion valve. It is managed directly by a microprocessor to mach exactly the plant thermal load. Thermostatic valve unacceptable because of its limited load range, higher refrigerant pressure drop and because of leaving evaporator water temperature control less good than an electronic device. Condensation control The units will be provided with an automatic control for condensing pressure which ensures the working at low external temperatures down to +10 C, because of the ON/OFF of the condenser fans, to maintain condensing pressure. Fan speed control, to allow units operation with very low ambient temperature, should be available as option. Control panel Field power connection, control interlock terminals, and unit control system should be centrally located in an electric panel (IP 54). Power and starting controls should be separate from safety and operating controls in different compartments of the same panel. Starting will be star/delta type as standard feature. Power and starting controls should include fuses and contactors for each compressor winding and fan motors. Operating and safety controls should include energy saving control; emergency stop switch; overload protection for compressor motor; high and low pressure cut-out switch (for each refrigerant circuit); anti-freeze thermostat; cut-out switch for each compressor. All of the information regarding the unit will be reported on a display and with the internal built-in calender and clock that will switch the unit ON/OFF during day time all year long. The following features and functions shall be included: - resetting chilled water temperature by controlling the return water temperature or by a remote 4-20 mA DC signal or by controlling the external ambient temperature; - soft load function to prevent the system from operating at full load during the chilled fluid pulldown period; - password protection of critical parameters of control; - start-to-start and stop-to-star timers to provide minimum compressor off-time with maximum motor protection; - communication capability with a PC or remote monitoring; - discharge pressure control through intelligent cycling of condenser fans; - lead-lag selection by manual or automatically by circuit run hours; - double set point for brine unit version; - scheduling via internal time clock to allow programming of a yearly start-stop schedule accommodating weekends and holidays.

508 B 04/01 A pag. 51/52

We reserve the right to make changes in design and construction at any time without notice, thus the cover picture is not binding.
McQuay Italia S.P.A. S.S. Nettunense, km 12+Cecchina (Roma) Italia Tel. (06) 937311 Fax (06) 9374014

508 B 04/01 A pag.52/52

 

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