http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/RSS.ashxRefrigeration and Air Conditioning PagesTue, 03 Jul 2007 12:34:52 +0200http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=1http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=1The Business of Shaping the Law 2 Inuencing Legislation 3 Nebraska City Water Pumps Up Performance 4 Oilfree Hydraulics Scrub Boats Clean 7 Getting Out of Hot Water With a Mixing Valve 8 SEER 13 Drives Rapid Change in Air Conditioning 10 Finding Harmony Between Refrigeration and Earth 12 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=2http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=2Who in the world will live with a 2 ton roommate to provide unparalleled technical support Michael Strouboulis doesnt just take his work home with him, he lives it. When one of his cus tomers was experiencing reliability problems, Michael took in the problem. The 2 ton system was moved to a Danfoss laboratory. During rigorous testing and analysis, engineers found that contamination was occurring during manufacturing at the OEMs plant. Michael then worked closely with his customer to eliminate the problem and ensure peak performance. Our engineers are persistent and tenacious. They dont let go of a problem until its his tory. If you require unparalleled technical support that is utterly reliable, try us. Visit us on the web at www. northamerica. danfoss. com to see how our expertise helps satisfy customers. Who in your world puts everything they have into solving your toughest problems We do. Michael Strouboulis, applications engineering manager Controls Compressors Condensing Units Gear Motors Adjustable Frequency Drives Valves Controllers Oil Pumps Thermostats Danfoss Dependable. Mike. Rev. indd 110104 95547 AM2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=3http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=3Vol. 3 Issue 21Danfoss Dependable. CONTENTS Volume 3, Issue 2 All the business sectors we serve are dealing with evolving regulations. Laws and policies on energy, environment, and health and safety, in particular, affect the Airconditioning and Refrigeration, Motion Controls, and Heating industries. As a global company based in Europe, Danfoss is in the special position of meeting regulations internationally while also helping its customers to prepare for regulatory changes in their own markets. Taking this challenge to heart, Danfoss puts high priority on going beyond compliance to run its operations efciently, safely and with minimal environmental impact, while also developing products that help customers meet their high standards. This issue of Solutions covers topics such as the relationship between industry and legislation, and technologies that help businesses meet new and changing regulations. We hope you nd the information useful to your business, and we look forward to your feedback. THE EDITORS, solutionsdanfoss. com www. northamerica. danfoss. com The Business of Shaping the Law. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Inuencing Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Nebraska City Water Pumps Up Performance. . . . . . . . . . . . . . . . . . . . . . . . . . 4 Oilfree Hydraulics Scrub Boats Clean. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Getting Out of Hot Water With a Mixing Valve . . . . . . . . . . . . . . . . . . . . . . 8 SEER 13 Drives Rapid Change in Air Conditioning. . . . . . . . . . . . . . . . 10 Finding Harmony Between the Earth and Refrigeration. . . . . . 12 Product News. . . . . . . . . . . . 16 Jeff Duncan North America Motion Controls Jennifer Hutchins Corporate Communications Aneta Stephens North America Heating Lisa Tryson North America Air Conditioning and Refrigeration DANFOSS SOLUTIONS is published for the benet of Danfoss customers. Information in the DANFOSS SOLUTIONS may be republished only with permis sion of editorial and always with credit to DANFOSS SOLUTIONS. Comments, suggestions, and contributions are welcome. This publication should not take the place of appropriate technical or legal advice related to companyspecic circumstances. DANFOSS SOLUTIONS does not assume any liability of any kind whatsoever for the use or reliance upon the information contained in this publication. Design by Arista Advertising, Inc. www. Arista Advertising. com Dear Readers, Who in the world will live with a 2 ton roommate to provide unparalleled technical support Michael Strouboulis doesnt just take his work home with him, he lives it. When one of his cus tomers was experiencing reliability problems, Michael took in the problem. The 2 ton system was moved to a Danfoss laboratory. During rigorous testing and analysis, engineers found that contamination was occurring during manufacturing at the OEMs plant. Michael then worked closely with his customer to eliminate the problem and ensure peak performance. Our engineers are persistent and tenacious. They dont let go of a problem until its his tory. If you require unparalleled technical support that is utterly reliable, try us. Visit us on the web at www. northamerica. danfoss. com to see how our expertise helps satisfy customers. Who in your world puts everything they have into solving your toughest problems We do. Michael Strouboulis, applications engineering manager Controls Compressors Condensing Units Gear Motors Adjustable Frequency Drives Valves Controllers Oil Pumps Thermostats Danfoss Dependable. Mike. Rev. indd 110104 95547 AM2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=4http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=4The business of shaping the law AS REGULATIONS EVOLVE regarding everything from taxes and labor to the environment, businesses feel pressure to get involved in the laws that govern them. Our industry was relatively apolitical for a long time, says Deborah Miller, vice presi dent of government and international affairs for the trade association Airconditioning Refrigeration Institute ARI. We are getting more involved in the regulatory process and our voice is being heard. HVACR industry members gain power by joining forces to inuence Capitol Hill deci sionmaking. Our industry can make a difference on a lot of issues that are important to business and also to society, says Miller. Lobbying efforts can range from networking with politicians and education initiatives, to letter writing campaigns and drafting bill proposals. Top concerns in the industry include issues such as refrigerant phaseouts, tax laws, and trade tariffs. TECHNOLOGY MEETS INTERNATIONAL POLICY The commercial world also faces international regulation. The European Union, for example, is gaining policymaking power in the trade arena, while the Kyoto and Montreal protocols set international standards for environmentally sound practices. Technology must keep pace with this plethora of regulations. Industry is by and large not against regulation, but seeks consistent, viable laws so they can prepare for the future. When bills are stalled in process or regulations differ at state, federal and international levels, it is difcult for businesses to plan for future compliance. Danfoss is actively involved in trade associations, like ARI, that advocate industrial interests in the countries where it does business. Danfoss also works with organizations that promote ethical and environmentally friendly business practices, and all the compa nys operations are or will be ISO 14001 certied. Danfoss also brings to its customers innovative technologies to help them meet strict regulatory standards. A Bill Is Born Ideas for legislation and bill drafts are unlimited and come from many different sources. Citizens have a right to petition and propose legislation to their Congressman or Congresswoman. Any member or delegate from the House of Representatives may introduce a bill at any time while the House is in session by placing it in the hopper, a wooden box kept in the House Chamber. In the Senate, a Senator usually introduces a bill or resolution by presenting it to one of the clerks at the Presiding Ofcers desk. Business and the law are linked in a complex dance between collaboration and controversy. Whether the oil industry wants the legal right to drill in a wildlife refuge, or a software company bat tles in court for its market dominance, business plays a major role in shaping legislation and vice versa. 2Vol. 3 Issue 2Danfoss Dependable. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=5http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=5The business of shaping the law Education and Communication Trade associations, symposiums and company events facilitate networking and educate legislators about issues that affect business. Vol. 3 Issue 23Danfoss Dependable. Inuencing Legislation Inuencing legislation involves education and communication. Legislators evaluate bills on many different topics, so it is important they receive clear, accurate information from constituents. Committee action is an important phase of the legislative process. One of the most important times to call, write, or email your legislator is when a bill is before the House or Senate for a oor vote and before approval votes in subcommittee or com mittee. The committees intensively consider pro posed measures and provide a forum for the public to voice opinions. Calls, letters, emails and petitions can help a bill pass through the committee stage. Developing relationships with elected ofcials and political decision makers is important to shaping legislation. Trade associations, symposiums and company events facilitate networking and educat ing legislators about issues that impact business. It is helpful to nd out legislators committee assign ments and to understand his or her platform and political ties. Politicians staff members are also important and often have strong inuence. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=6http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=64Vol. 3 Issue 2Danfoss Dependable. I Pumps Up Performance Nebraska City Water Its a challenge to make sure all community residents will have water whenever they turn on their faucet for a drink or get under the shower, says Dean Hauptman, superintendent of Nebraska City Utilities Water Treatment Plant. When something affects the pressure, like when the tower is down, we had to be here around the clock opening and closing valves. It took a lot of time and energy to manually monitor and adjust pressure. The city also had to meet new water quality standards. Nebraska City gets its water through the wells from ground water sources. When the Health Department recently deemed the plant Groundwater Under the Direct In uence, it raised many new treatment issues for the plant. The treatment facility had to increase the time the water is exposed to chlorine in order to destroy healththreatening bacteria and micro organisms. The high ow conditions did not allow this. There was the added problem that the water tower level was maintained exclusively by onoff control. When the level dropped below a certain point, the pump would turn on and pump water into the system, and when the level increased to a certain point the pump would switch off. As a result, there were pressure uctuations and a lot of water loss due to leaks, which meant big nonrevenue water costs. The upgrade was a tall order to regulate pressure, increase chlorine contact time, and diminish leakage. Many people rely on the plant for their water. Nebraska Citys limesoftening water treatment plant operates a well eld with nine wells north of the plant at Riverview Marina State Park. It serves about 7, 000 residents living in the city and Imagine looking forward to a nice hot shower in the morning when only a weak stream of water falls from your showerhead. This happened all too often to residents of Nebraska City, Nebraska, before the recent upgrade of the areas water treatment plant. A new pumping system with Danfoss VLT Variable Frequency Drives with motor control resolved the pressure problems and also brought water quality up to the latest public health regulations. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=7http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=7Vol. 3 Issue 25Danfoss Dependable. surrounding rural areas, with a peak demand for distribution of about 3, 200 gallons per minute gpm. Many factors caused water delivery problems in and around the city, including droughts, the aging treatment facility, and the long distance of the water tower from the water supply plant. After intensive analysis the plant installed a new highservice pump equipped with VLT 8000 AQUA variable frequency drives with harmonic ltration, and MCD 3000 soft starts. Now, instead of the four pumps in the old system, the system uses just one highservice pump. UNDER PRESSURE TO TAKE CONTROL The common way to regulate water pressure is with a control valve. However, variable frequency drive control VFD is better because it is more energy ef cient. A variable frequency drive matches the speed of the pump to the pressure requirements to keep the pump operating at its highest ef ciency point for much less energy usage. We were able to meet Nebraska City Utilities unique challenge by integrating Danfoss motor control to the new pumping system, says Gary Sasse, Nebraska City Branch Manager for JEO Consulting, who designed and engineered the upgrade project. Not only does it regulate the pressure throughout the distribution system but it also has the added bene ts of AHF harmonic distortion ltering for precision performance. The new pump with Danfoss VFD technology, supplied by Terrance Pesek of Associated Technologies Limited, signi cantly improved water ow and overall system ef ciency. It also achieved tighter pressure setpoint control, cut nonrevenue water costs, lowered customer complaints about pressure uctuations, and signi cantly decreased the plants energy bill. Controlled ow also allowed the plant to increase chlorine contact time in the treatment plant to meet the new health requirements. You can see the major improvement in pressure control clearly, in the measure ment charts, says Hauptman. They show that the psi pounds per square inch is nearly constant when the tower is down. We have built a lot of redun dancy features into the system, including keeping the old pump over clearwell B as a backup but so far we havent had to use it. Since implementing the new pump system, Nebraska City Utilities no longer needs 24hour manual pressure adjustment during water tower mainte nance. And the facility can now provide reliable water pressure throughout the Nebraska City area, even when the tower is down for maintenance. Continued on next page Pumps Up Performance Since implementing the new pump system, Nebraska City Utilities no longer needs 24hour manual pressure adjustment during water tower maintenance. The facility can now provide reliable water pressure throughout the Nebraska City area, even when the tower is down for maintenance. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=8http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=8Danfoss Dependable. Vol. 3 Issue 26 What ows from your faucet Pathogenic bacteria transmitted to humans through drinking water supply can lead to illnesses such as typhoid fever, dysentery, infectious hepatitis and gastroenteritis. The Safe Drinking Water Act gives the Environmental Protection Agency EPA the authority to safeguard tap water for Americans. United States drinking water is among the safest in the world. Authorities assess and protect drinking water sources protect wells and collec tion systems make sure water is treated by qualied operators ensure the integrity of distribution systems and make information available to the public on the quality of their drinking water. FROM COMPLAINTS TO CONSISTENCY In the treatment plant, transmission mains transport raw well water to the treatment plant, and the water ows by gravity into two clearwells clearwell A built with the original construction has a nominal storage capacity of 225, 000 gallons the newer clearwell B has a nominal storage capacity of 1. 3 million gallons. The water tower steel structure, located at a distance from the plant, has a capacity of about 750, 000 gallons. A new 400 HP, 3, 500 gpm high service pump was installed over the newer clearwell, with Danfoss VLT 8000 AQUA variable frequency drives, AHF 010 harmonic lters, and MCD 300 soft starters VFD bypass. A second pump and VFD control system was also installed on the smaller backup pump used during high demand periods. Since the new pump was installed the plant has maintained near constant pressure during the plants daily delivery operations. The tighter system pressure control was even evident during an extended period when the water tower was removed from service for annual maintenance. With VFD pump motor control, the water level in the tower can now uctuate without affecting system pressure. The VFD controls the startup and shut down, and maintains the speed of the pump based on pressure in the system. The city also requested that the variable frequency drives have a softstart bypass in case, for some reason, the drives had to be taken out of service. The Danfoss MCD 3000 softstart is used in the bypass mode and allows for gradual stopping and starting when the drive is out of service, which minimizes hydraulic shock in the system. The soft start provides undercurrent protection, prevents reverse pump rotation damage, and diminishes motor strain. When the VFD is in service it also prevents water hammer and its associated problems because it slowly ramps the motor up to speed on starting and slowly ramps down the motor when stopping. DIMINISHED HARMONICS Another goal of the upgrade was to insure that the new VFDs would not cause any harmonic distortion harmonic frequencies produced by an electronic system when a signal is applied at the input. Danfoss AHF 010 Harmonic Filters were connected to the VFD to reduce harmonic distortion, and testing showed that the lters meet the requirements of Harmonic Guidelines set forth in IEEE 5191992. Today the facility is pleased to see its decreased utility bills. And Nebraska City residents count on getting nice, hot showers and quality drinking water day after day. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=9http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=9I t seems like a peaceful and harmless activity to sail on the open ocean or on a lake. But what if the yacht or speed boat youre sailing in is damaging the beautiful nature youre enjoying This used to be the case when toxic paint was used on the bottom of boats to prevent the buildup of algae and weeds on the bottom of boats. Since the 1980s regulations from the International Maritime Organization IMO have banned the use of TBT in anti fouling paints. In the past, arsenic and tin were also added to the paint. These chemicals and heavy metals did their job of eliminating algae and weeds, but they also polluted the lakes, rivers, and oceans. TBT in particular impacts the hormonal makeup of various small sea and lake creatures, such as oysters and whelks. According to research, the compounds used in the paint also possibly enter the food chain. SIMPLY WATER Since the ban on TBT and other heavy metals, paint companies have struggled to nd nonpollutant compounds. Many of the compounds that are environmen tally friendly simply do not keep algae and weeds away, and the warmer the water, the faster weeds and algae attach to the bottom of the boat. This is a problem, as the more weeds and algae on the boat, the more fuel the boat consumes. The approved antifouling paints used on small crafts today are still estimated to leach 1. 4 kilograms approximately 3 lbs of biocides each year. Thanks to cooperation between a company called Boat Scrubber and Danfoss Nessie Water Hydraulics, a solution is now available for smaller crafts. The Boat Scrubber is like a carwash for boats that uses regular water and hydraulic arms with brushes to clean the underside of boats, explains Boat Scrubber founder and CEO Adrian Hudd. This allows boat owners to use the nontoxic, environmentally friendly antifouling paints while maintaining a clean bottom. The system uses the latest computer technology to sense the contours of the hull, which guides the brushes up and down. An automatic winch system slowly pulls the boat along the pontoon through the path of the brushes. Since the Boat Scrubber is a closedloop hydraulic system, it uses no chemicals, detergents or toxic substances, but simply water. The company was started in 1996, after Hudd developed the concept. Hudd is an inventor and found the technical knowl edge he needed to put his ideas into practice at Danfoss. Danfoss products, such as the cylinder and motor, valves, sensors and electrical controls make up about 80 percent of the Boat Scrubber system. Nessie hydraulic motors control the rotors, as well as the hydraulic components for the up and down movements of the brushes. BOATS STAY CLEAN AND GREEN Boat Scrubber has grown from a oneman company to an interna tional rm and has major projects around the world. It entered the market this year after Danfoss helped adapt the electrical controls to the United States market and obtain the necessary approvals. Twelve Boat Scrubbers have already been sold in the country. The system is particularly important for lakes that also provide drinking water for the surrounding communities, to meet safe drinking water regulations. The rst system is being set up on Lake Lenier, near Atlanta, Georgia. The lake was the setting for the sailing events for the 1996 Atlanta Olympic Games and sees approximately 20, 000 sailboats per year on its shores. Thanks to Boat Scrubber, more of these boats will be sailing in harmony with nature. Danfoss Dependable. Vol. 3 Issue 27 Oilfree Hydraulics Scrub Boats Clean Danfoss products, such as the cylinder and motor, valves, sensors and electrical controls make up about 80 percent of the Boat Scrubber system. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=10http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=108Vol. 3 Issue 2Danfoss Dependable. W Who doesnt enjoy the pleasure of a leisurely shower or a relaxing hot soak in the tub Unfortunately, a simple shower or bath has the potential to result in painful, debilitating or even fatal burns. Domestic hot water is responsible for the highest number of fatal and severe scald injuries in the home. Children and elderly people are most at risk because their skin is thinner and less tolerant to high water temperatures. In addition, slowed reaction times put the elderly and the disabled at higher risk of scalding injuries. And it is a doubleedged problem water heaters set too high can result in burn injuries or even death, those set low to prevent scalding allow growth of deadly waterborne Legionella bacterium. Safety standardizing bodies and regulators recommend the use of thermostatic mixing valves TMVs in homes, schools and other public facilities, and many consider TMVs essential for showers and all hot water taps in housing for the elderly and disabled people. In many countries, agencies that develop plumbing codes are actively addressing the issues of water storage temperatures. Past practices of allowing occupants to manually blend scalding 60C 140F and cold water at the tap are being reexamined. For example, Canadian plumbing codes for new construction are being changed to require water supplied by ttings in residential buildings to be limited to a maximum of 49 C 120 F. This requirement can be met either by a master mixing valve at the heater or by mixing valves tted at each outlet. Two key factors drive these plumbing code changes. First, theres the danger of scalding. Every year thousands of people suffer serious thermal shock or scalding injuries from contact with water that is simply too hot. Burns often require long periods of rehabilitation, multiple skin grafts and painful physical therapy, and they can leave victims with lifelong physical and psychological trauma. According to the American Burn Association, a very serious third degree burn would occur within 5 seconds at 60C 140F, but 5 minutes of elapsed exposure would be required at 49C 120F. Everyone will feel pain from water temperatures over 43C 110F, even if it does not result in a severe burn. Water at 38C 100F is considered to be the safest temperature for bathing. The second risk is Legionella bacterium. On the surface, simply turning down the water heater temperature seems to be an easy way to solve the problem. If a water heater is set between 43 and 49C 110 and 120F, the potential for severe burning decreases. But this is not always a realistic solution, due to the often overlooked danger of Legionella growth in lowtemperature water. Some people can be infected with the Legionella bacterium and have mild symptoms or no illness at all. People in poor health, however, are particularly susceptible to a rare form of pneu monia caused by Legionella. This bacteria can thrive in storage Incorporating thermostatic mixing valves into hot water systems improves health and safety. Getting out of Hot Water with a Mixing Valve 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=11http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=11water environments of 49C 120F or less creating a poten tial problem in hot water distribution systems. To control the bacteria growth, it is necessary to store water at 60C 140F or higher. MIXING SOLUTION TO THE RESCUE It is not possible to maintain water temperatures at the tap that eliminate the possibility of scalding injuries while simultane ously preventing the growth of Legionella bacteria. Regulators and code developers cannot simply legislate the lowering of water heater temperatures. There is scientic evidence that water temperatures below 56C 132F provide an environment for Legionella and other bacteria to survive. And lowering the water heaters factory setting will reduce the amount of available hot water. It is also necessary to consider consumer tampering. Adjusting the water heater thermostat in an attempt to increase the amount of hot water could result in electrocution or the temperature being inadvertently set higher than 60C 140F, thereby increasing the exposure to scalding. Larger water heater capacity will be required to supply the same amount of hot water if water heaters must be set no higher than 49C 120F. In many cases, larger capacity water heaters will not t in the available space. Then there are special demands for hightemperature water. Many dishwashers and dish soap manufacturers recommend that the incoming water temperature be 60C 140F for the proper cleaning and sanitizing of dishes. And, of course, theres the issue of health. Many people, particularly asthma sufferers, need to wash their linens and clothes in 60C 140F water. SOLUTION TO PREVENT SCALDING AND CONTAMINATION Thermostatic Mixing Valves are an answer for all these consid erations. ESBE, which Danfoss represents in North America, as well as other manufacturers, offer solutions in the form of thermostatic mixing valves TMVs. These devices allow water heater temperatures to be set high enough to prevent Legionella growth, while still providing antiscald water temperatures to the xtures. Hot water from the heater is fed into one of the two inlet ports, while cold water enters the other inlet. Based upon the TMVs set temperature, the thermostatic element within the valve adjusts the amount of hot and cold water, allowing the proper mixed temperature to leave the outlet port of the xture. In the event of a sudden loss of cold water for proper mixing, the TMV will respond by closing the supply hot water side of the valve. Once a year the thermostatic mixing valve should be tested to ensure that the performance of the valve has not changed since the time of installation. CERTIFICATIONS To ensure the thermostatic mixing valves provide proper protection from scalding the American Society of Sanitary Engineering ASSE and the Canadian Standards Association CSA certications were established. TMVs conforming to the ASSE standards must maintain temperature stability at all times, and be able to shut down safely and quickly in the event of coldwater failure. The placement of these valves on the domestic hot water system is dependent on the valves ANSI ASSE listing. If the TMV is listed as ANSIASSE 1017, it would be used on the entire house and would be piped at the water heater. If the valve is listed as ANSIASSE1016TP, the valve is a Point of Use installation, that is, installed at the xture. SAFETY CODES As plumbing codes develop, TMVs become a recommended solution. Although further work needs to be done, agencies that develop plumbing codes in various countries have recently made progress in dening codes. The USA has dened codes that set limits to shower tub outlets, bidet and sink outlets max 49C120F. Methods of controlling these limits are not yet dened. The Canadian Plumbing Code suggests two methods of complying with the new requirement Option 1. A wholehouse Master or Point of Distribu tion automatic compensating mixing valve TMV installed at the water heater, or Option 2. Individual xture Point of Use automatic compensating Mixing Valves TM2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=12http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=1210Vol. 3 Issue 2Danfoss Dependable. IT IS AN INESCAPABLE REALITY that changing regulations put economic pressure on industry. No sector is more affected than airconditioning. After dealing with two decades of change under environmental protection laws, the airconditioning and refrigeration industry has entered a new era of refrig erant restrictions and bans. Nationally and internationally the industry is working toward a commercially viable way to meet environmental regulations. Deborah Miller, vice president of government and international affairs for the Air Conditioning and Refrigeration Institute ARI says We need to ask, how do we strengthen and demonstrate our commitment to being stewards of the environment In January 2001, the industry faced another upheaval, particularly for air conditioning manufacturers, when the United States Department of Energy DOE proposed regulation to save 4. 2 quads of energy by 2030 1 quad is more than 29 billion kilowatt hours. The new DOE regulation raises the minimum Seasonal Energy Ef ciency Ratio SEER, from 10 to 13 for residential central airconditioners. By 2006, residential airconditioning manufacturers must increase energy ef ciency by 30 percent. This means manufacturers must redesign dozens of products to comply, thus requiring research, development, and retooling at tremendous cost. ARI, representing more than 90 percent of U. S. airconditioning manufacturers, urged the DOE to adopt a more consumerfriendly 20 percent increase, and worked to stall the implementation date. But the trade association withdrew its challenge in 2004 to serve the industrys need for timely certainty of regulations. The current 10 SEER standard, which went into effect in 1992, will continue Drives rapid change in airconditioning For the consumer, a higher ef ciency airconditioning unit means lower operating cost for a substantial savings on utility bills. And less demand is placed on the utility grid, which is hardpressed keep up with increasing power consumption. SEER 13 Danfoss products and technology help manufacturers meet new standards for the airconditioning and refrigeration industry. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=13http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=13Vol. 3 Issue 211Danfoss Dependable. to be the national minimum efciency standard for central airconditioners and heat pumps until January 23, 2006, when equipment manufactured after that date must meet the 13 SEER standard. Costs of regulation SEER for an airconditioning system is dened as the total cooling output in BTU British thermal units the system provides during its normal annual usage period divided by its total energy input watthours, weighted over a range of conditions that simulate operating seasonality. For the consumer, a higher efciency airconditioning unit means lower oper ating cost for a substantial savings on utility bills. And less demand is placed on the utility grid, which is hardpressed to keep up with increasing power consump tion. This leads to signicant reduction in the volume of greenhouse gases that result from power generation. But if standards for energy efciency are set too high, new equipment becomes more expensive. This could induce consumers to repair older, less efcient equipment rather than replace them with more costly high efciency systems. This is the industrys main argument for a more moderate increase in the minimum efciency standard. Fortunately, while the regulation was delayed, development continued in the airconditioning industry to meet the new requirements. Danfoss is an important partner for manufacturers of residential airconditioning systems, helping them to meet the SEER 13 requirement by 2006. Solutions to SEER demands There are a few ways to increase energy efciency of residential airconditioning units to the required level. Some of the most common include Using a thermostatic expansion valve TXV in place of the xed orice now used in the majority of units meeting the current 10 SEER requirement Increase the heat exchanger surface area Using electronic valve technology Using higher efciency compressors and fans Using variable speed compressors and fan motors Danfoss supplies products and technology for various solutions, but factors like time to market and use of resources, the TXV solution stands out. Increasing the heat exchanger surface area requires increasing the physical size of a unit, often making its use in replacing an older, smaller unit problematic. Elec tronic valve technology requires electronic controls that cause unit price increases, as do compressors and fans that offer signicantly greater efciency or vari able speed capability. Considering time constraints, the TXV seems to be the best solution for meeting SEER 13 requirements. Refrigerant ow into the evaporator coil of an airconditioning system is regulated. With the traditional xed orice tech nology, the size of the orice is an average that remains constant, so the ow of refrig erant into the evaporator remains constant regardless of the cooling demand on the system, for only average efciency. Using a thermostatic expansion valve increases efciency by varying the ow of refrigerant into the systems evaporator coil depending on the load on the system. When the load the demand for cooling decreases, the expansion valve orice partially closes in response this means less work for the compressor, so less energy is consumed. To support the industry, Danfoss is increasing production capacity of the TXV and is offering the TR6 in appropriate congurations and sizes for residential units. The valve meets high standards for repeatability, reliability, and long service life, to ensure that airconditioning systems meet the new higher SEER standard. Residential airconditioning systems come in sizes and congurations to serve all kinds of homes. The many system models offered by OEMs require valves of varying capaci ties, and different connection types and sizes. And research continues as Danfoss investigates more ways to attain energy efciency while containing costs. Drives rapid change in airconditioning To support the industry, Danfoss is increasing production capacity of the TXV and is offering the TR6 in appropriate c2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=14http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=1412Vol. 3 Issue 2Danfoss Dependable. Our attempts to keep things cool affects the planet we live on. A major concern is refrigerants that may deplete the ozone layer. Our attempts to keep things cool affects the planet we live on. A major concern is refrigerants that may deplete the ozone layer. Our attempts to keep things cool affects the planet we live on. A major concern is refrigerants that may deplete the ozone layer. Our a Our a Our a Our a Our a Our a Our attempts to keep things cool affects the planet ttempts to keep things cool affects the planet ttempts to keep things cool affects the planet ttempts to keep things cool affects the planet ttempts to keep things cool affects the planet ttempts to keep things cool affects the planet ttempts to keep things cool affects the planet we live on. A major concern is refrigerants that we live on. A major concern is refrigerants that we live on. A major concern is refrigerants that we live on. A major concern is refrigerants that we live on. A major concern is refrigerants that we live on. A major concern is refrigerants that we live on. A major concern is refrigerants that may deplete the ozone layer. may deplete the ozone layer. may deplete the ozone layer. may deplete the ozone layer. may deplete the ozone layer. may deplete the ozone layer. may deplete the ozone layer. Our attempts to keep things cool affects the planet we live on. A major concern is refrigerants that may deplete the ozone layer. Danfoss Dependable. FINDING HARMONYFINDING HARMONYFINDING HARMONY BETWEEN THE EARTH BETWEEN THE EARTH BETWEEN THE EARTH BETWEEN THE BETWEEN THE BETWEEN THE BETWEEN THE BETWEEN THE BETWEEN THE BETWEEN THE EARTH EARTH EARTH EARTH EARTH EARTH EARTH BETWEEN THE EARTH FINDING HARMONYFINDING HARMONYFINDING HARMONYFINDING HARMONYFINDING HARMONYFINDING HARMONYFINDING HARMONYFINDING HARMONY Legislation and the Environment Vol. 3 Issue 212 Nature Meets the Law The idea that humans should take care of the natural environment took hold in the 1960s. This led to the National Environmental Policy Act in 1970, and from that the Environmental Protection Agency EPA. In the rst two years the EPA passed legal controls on pesticides, water pollution and air pollution, followed by legislation to control toxic substances, resource conser vation and recovery, and water quality improvement. 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=15http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=15Vol. 3 Issue 213Danfoss Dependable. Danfoss Dependable. Vol. 3 Issue 213 FINDING HARMONY THE EARTHS OZONE LAYER PROTECTS all life from the suns harmful radiation, reports the U. S. Department of Energy. But human activities have damaged this shield. Less protection from ultraviolet light will, over time, lead to higher skin cancer and cataract rates and crop damage. Noncompliance with everchanging refrigerant regulations can lead to costly nes. Companies that use refrigeration, such as refrigerated transport container operators or businesses that sell from beverage vending machines, put top priority on meeting government standards and regulations. This is especially challenging for international rms, because refrigerants acceptable in some countries may not be legal in others. In addition, different refriger ants require different system designs and components, making it complicated and costly to comply with changing regulations in many countries. Dawning of the age of environment It was ecologist Rachel Carsons 1962 book Silent Spring that marked the beginning of popular interest in preserving the natural environment. She wrote, As crude a weapon as the cave mans club, the chemical barrage has been hurled against the fabric of life. Carson described a world radically impacted by overuse of DDT and other insecticides that destroyed bene cial insects along with harmful ones, disturbing links in the food chain, including humans. Through the decades, Carsons message resonated and environmental concerns took on political and economic importance. By the end of the sixties, most colleges and some high schools offered courses in ecology, and everyday language absorbed new terms like global warming, ozone depletion, and greenhouse effect. The Environmental Protection Agency was established, legislation was passed, and regulations took effect. Refrigerations impact on the planet became a major point of public concern. Scientists concluded that certain refrigerants were part of the barrage on the planet as Carson described. The most common refrigerant, in use since the 1920s, were chlorinecontaining CFC uids chloro uorocarbons. At one time these chemicals were considered ideal because they are stable, thermodynami cally ef cient, inexpensive, nontoxic, odorless and noncorrosive. HCFCs hydrochloro uorocarbons later came along, with similar characteristics. However, because of their ozonedepleting potential, these refrigerants came under scrutiny. First, CFCs were phased out in the developed world due to their signi cant ozone depletion potential ODP and high global warming potential GWP. HCFCs temporarily replaced CFCs in refrigeration systems, but even as those compounds were put into use, regulators decided to phase them out. Interest in equipment that uses refrigerants with little or no impact on the ozone and global warming is increasing. Some of these alternatives, however, have other disadvantages such as toxicity or ammability. AND REFRIGERATIONFINDING HARMONYFINDING HARMONY BETWEEN THE EARTH BETWEEN THE EARTH BETWEEN THE EARTH BETWEEN THE EARTH FINDING HARMONY2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=16http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=16Milestones in Green Thinking Early 1970s The Environmental Protection Agency is created, consoli dating fteen federal organizations involved in environmental regulatory and enforcement activities. The popular press begins coverage of ozone depletion, forecasting that holes might develop in the ozone shell that protects the earth from massive doses of lifealtering UV radiation. 1972 The United Nations convenes a Conference on the Human Envi ronment. The conference published a Declaration with the goal of stimulating response among the governments of the world, to the need for a common outlook and for common principles to inspire and guide the peoples of the world in the preservation and enhancement of the human environment. 1980s It becomes widely known that, a hole has developed in the ozone layer over Antarctica. Reaction to the news ranges from disbelief to so what to sheer fright. Scientists warn of a new threat global warming due to the release of greenhouse uids into the earths atmosphere. 1987 The Montreal Protocol on Substances that Deplete the Ozone Layer is formulated. The Montreal Protocol was amended in 1990 and 1992. 1990 The Clean Air Act is passed in the United States. Among other provi sions, refrigerant venting becomes illegal. This means that service prac tices long considered routine had to be stopped. 1997 The Kyoto Protocol creates binding limitations on developed nations for emission of greenhouse uids. A hole lets in the heat Carl Sagan pointed out that the earths atmosphere is fragile, like a coat of varnish on a globe. In relation to the size of the planet, it is thin and vulnerable to mans progress. The rst regulatory action to protect the atmosphere from uorinated hydrocarbon uids mostly CFCs took effect in 1978, when the Food and Drug Administration, Environmental Protection Agency, and Consumer Product Safety Commission ordered the phaseout of nonessential uses of uorocarbons in aerosol spray prod ucts, such as deodorants, hair sprays, household cleaners and pesticides. When studies by the National Academy of Sciences and other researchers concluded that the refrigerants could seriously damage the atmospheric ozone layer, the subject of CFC refrigerants was not raised, at rst. But refrigerants came under re by environmentalists when scien tists discovered a hole in the earths atmospheric ozone layer that could compromise the earths protection from the suns extremely harmful ultraviolet radiation. As a result, the entire refrigeration industry has undergone considerable changes. European nations began to restrict the use of CFC refrigerants. These commercial and residential appliance refrigerants were deemed destructive to ozone and contributors to the greenhouse effect. After the EPA was established in 1970, seven years passed before the Montreal Protocol set international standards to preserve the ozone layer. UN Secretary General Ko Annan praised the protocol as perhaps the most successful environmental agreement to date. The protocol also put pressure on commercial interests. Industry feels phaseout While legislation has been relatively slow at the federal level, certain states, like California, passed early clean air regulations and began to lead in regulation of refrigerants. Other states, such as Maryland, with a strong shing industry in the Chesapeake Bay area, established restrictions to avoid commercial repercussions. Although progress is good, the downside of statebystate regulation is a patchwork of laws that make it dif cult for businesses to comply. Yet the costs of compliance at any level can be enormous. CFC replace ment and scheduled phaseout of early alternative refrigerants has had major nancial impact on refrigeration and airconditioning industries. Green Thinking Drives Innovation Without a doubt, regulatory pressure has been driving product development. In the HVACR business the familiar saying holds true, Necessity is the Mother of invention. Due to the phaseout of CFCs, system2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=17http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=17Manufacturers already faced the chal lenge of providing competitively priced systems for the best possible aircondi tioning or refrigeration that is energy efcient and has low maintenance costs. The new regulations meant engi neers and manufacturers also had to design equipment for use with legal, nonozone depleting refrigerants with acceptable environmental impact. Cooling industry meets Clean Air Act In 1990 the Clean Air Act was passed, and stated as one of its primary goals To protect and enhance the quality of the Nations air resources so as to promote the public health and welfare and the productive capacity of its population. By 1992, venting of refrigerant chemical compounds became illegal. Violating contractors could be ned tens of thousands of dollars for a single violation. Installers and mainte nance contractors had to add to their objectives to observe strict and costly refrigerant recycling regulations and greatly improve their vigilance to elimi nate system leaks, in order to protect themselves and their customers. To deal with the lack of pure substances that are nontoxic, non ammable, and zeroozone depleting, the industry has been blending avail able substances, sometimes adding hydrocarbons. Many new alternatives contained R22. And HCFCs were scheduled for phaseout under the terms of the Montreal Protocol. Socalled longterm replacements are now available for CFC and HCFC refrigerants in all applications. Production for products using these alternative refrigerants has increased, and compressors, valves, and other components are being produced in high quantities. Many countries, including the U. S. , consider HFCs, which contain no chlorine at all, as long term replace ments. They are safe, effective, and energy efcient. The problem with HFCs is that they are controversial in some countries because they are considered global warming gasses. With the future of HFCs limited or in doubt, and as global companies look for internation ally accepted platform, experimentation began with alternatives that contained neither chlorine nor uorine. This sparked investigation and eventually use of hydrocarbons, ammonia, carbon dioxide CO2 and other compounds. Technology meets future regulation Compounds to use as refrigerants are limited. Some compounds limited in the past are today being more widely applied. An example is hydrocarbons, long used in the petrochemical industry for process cooling. Each potential nontraditional compound has its price. In the case of hydrocarbons, it is ammability. Danfoss together with Coca Cola, has developed a compressor and compo nents for vending machine systems that use CO2 as refrigerant. The Air conditioning Heating and Refrigeration Exposition presented its Refrigeration Innovation Award for 2004 to Danfoss for developing the Danfoss type TN compressor, which is able to efciently provide the high pressures required for CO2 refrigerant. This breakthrough arose from the desire to create a system that uses a refrigerant acceptable worldwide, and satises the regulations of every country, and is environmentally neutral. CO2 is a naturally occurring compo nent of our atmosphere with absolutely no ozone depletion potential and in the quantities used for refrigeration a negligible global warming effect. No single refrigerant can be the ideal solution for all applications, because different temperature requirements demand different boiling points, and therefore different compounds. Research into alternative refrigerant is critical to keep pace with evolving regulations. Danfoss is committed to research and development in order to provide its customers with solutions for refrigerants of today and tomorrow. Vol. 3 Issue 215Danfoss Dependable. BREATH EASYUnder the Clean Air Act, the United States Environmental Protection Agency sets limits on how much of a pollutant can be in the air anywhere in the United States. This ensures that all Americans have the same basic health and environmental protect2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=18http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=1816Vol. 3 Issue 2Danfoss Dependable. PRODUCT NEWS Danfoss and Montrealbased Turbocor formed a 5050 joint venture, Danfoss Turbocor Compressors Inc. The new company includes Turbocors exist ing product line of oilfree centrifugal refrigerant compressors, its growing worldwide customer base and its manufacturing facility in Montreal, which currently employs 77 people. HVAC industry vet eran Joe Orosz, President of Danfoss Commercial Compressors Ltd. , Lawrenceville, Georgia, has been appointed President of the new company. The joint venture company will provide the HVAC market with energy efcient compressors that optimize operating costs, focusing on the heavy commercial and light industrial chiller markets for commercial air conditioning in the range of 6090 tons R134a. The key to this transaction is the growing interna tional support for Turbocors new oilfree commercial compressor range, which uniquely combines magnetic bearings, directdrive permanentmagnet motor, variablespeed drive, 2stage centrifugal compression and fullydigital integrated electronics. Turbocors oilfree centrifugal compressors routinely deliver IPLV energy savings of 3040 percent, and very quietly 70 d Ba at 1m. Recent industry awards include the 2003 AHRExpo Energy Innovation Award, a 2003 win in the Canadian Energy Efciency Awards Equipment Category, and a muchprized Climate Protection Award in 2004 from the Environment Protection Agency. For more information call 410 9318250. Danfoss and Turbocor Form High Efciency Compressor Joint Venture Danfoss introduces type SFVL backpressuredepen dent pressure relief valves designed for external and internal protection of vessels and other components against excessive pressure with refrigerants R717 ammonia, HFC, and HCFC refrigerants, with a temperature range from 20F to 275F. The SFVL design incorporates Teon valve seats mated with triple crown sealing rings to provide compound sealing. A special extralift, popopen feature provides high relief capacity. A fourwing guided stainless steel upper seat provides guidance for the high lift and reseating action. The valves are available with pressure settings from 75 to 400 psi, and a maximum working pressure of 500 psi. Common set pressures of 150, 250, and 300 psi are standard, with other pressure settings available on order. Connections are NPT threaded. Onehundred percent factory testing through three separate test sequences veries quality and set pressure of every Danfoss relief valve before it is factory sealed. SFVL valves comply with ASHRAE Addendum 15C2000, are manufactured in accordance with ASME quality control procedures, and are stamped with the UV symbol. They also carry the NB certi cation symbol of the US National Board of Boiler and Pressure Vessel Inspectors. The valve body is of ductile iron meeting ASME SA395 specication grade 604018. All valve seats, springs, and spring guides are constructed from 304grade stainless steel. Valve bodies are painted with a corrosion inhibiting primer paint. Low capacity relief valves are also available from Danfoss for compliance with requirements for new installations and local ordinances. For more information call 410 9318250. Backpressure dependent Pressure Relief Valves 2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=19http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=19Vol. 3 Issue 217Danfoss Dependable. PRODUCT NEWS Danfoss North America Motion Controls introduces the new Decentral Motion Control Solutions Catalog. The catalog discusses the features and benets of utilizing decentral solutions. It also provides complete product features, conguration options, and accesso ries, technical and performance data, and ordering information for their VLT Decentral Drive Motor FCM 300, VLT Decentral Drive FCD 300, VLT Decentral Motor Starter DMS 300, and Eta Solution Geared Motors. Decentralized motion control meets the evergrowing demands for maximum instal lation exibility, and reduced lead time and commissioning of industrial machinery. Decentralization lowers installation costs, makes cabinet space requirements nearly obsolete, and signicantly reduces cabling expenses. It also facilitates quick and easy service, retrot ting and upgrading. Additional features include improved utilization of narrow space and easy reconguration of production ow. For more information call 905 6766000. Type TUH and TCHE capacity regulators adapt compressor capacity to actual evapo rator load for applications operating at an evaporating temperature near 32F. They are suitable for applications such as air driers, water chillers, ice machines, and chillers for electronic component cooling, in nominal capacities from 0. 5 to 2. 2 TR R404A, and are optimized for use with R134a, R404A R507, and R407C. These new lower capaci ties complement the Danfoss offering of CPCE and KVC capacity regulation valves, which are for larger systems up to 12 TR and 6 TR respectively. Placed in a bypass between the high and low pressure sides of the system, these valves maintain suction pressure by bypassing hot or cool gas from the high pressure side. Type TUH has internal pressure equalization, and type TCHE is externally equalized. Both open on a decrease in suction pressure at the valve outlet. The TCHE has external equalization, and opens directly on a decrease in the suction pressure at the compressor. Introduction of the TUH and TCHE marks the rst time capacity regulation valves for hot gas bypass have been made of stainless steel with the bimetal connections. Bimetal is formed from stainless steel and copper rolled together under extreme pressure until the metals fuse. Then connections are deep drawn from the bimetal sheet. The result is a connection that allows brazing with common materials in less than half the time, and without using wet cloths or chill blocks. The interior of the connection is solid copper, but the exterior and the rest of the valve body are stainless steel, which transmits very little heat to the sensitive valve mechanism. Inlet connection size is 38, and outlet size is 12. Pband for the valves is 7. 3 psig. The narrow Pband means that the valve can modulate with precision capacity bypass compared with a conventional hot gas bypass valve, whose Pband is more on the order of 30 psig. The Pband of a valve is the pressure increase that must occur before a fully closed valve becomes fully open. Maximum valve body temperature is 248F, with maximum working pressure 500 psig. TUH and TCHE valves are manufactured with a laserwelded power element. Laser welding is used because it requires much less heat input than plasma welding, extending diaphragm service life. Valve identication data is laserengraved on the element, too. There is no paper label that can become illegible or lost. For more information call 410 9318250. New Hot Gas Bypass Valve Designed with Bimetal Connections New Motion Control Catalog2007-07-03T12:34:52+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=20http://danfoss.ipapercms.dk/refrigerationandairconditioning/ra/solutions/us/solutionsv322004/?Page=20October WEFTEC Technical Conference and Exhibition October 3 6, Ernest N. Morial Convention Center, New Orleans, LA. ISH North America October 14 16, Boston Convention Exhibition Center, Boston, MA. HARDI Annual Fall Conference October 15 19, Hyatt Regency Chicago, Chicago, IL. ACCA Commercial Contracting Roundtable October 26 27, Sheraton Inner Harbor, Baltimore, MD. 2004 RETA National Convention October 26 29, John Ascuagas Nugget, Reno, NV. November ARI Annual Meeting November 14 16, Scottsdale, AZ. December International Work Boat Show 2004 December 1 3, Ernest N. Morial Convention Center, New Orleans, LA. CALENDAR OF EVENTS Please mention that you read about the event in Danfoss Solutions HOW TO CONTACT DANFOSS BALTIMORE, MD 7941 Corporate Drive Baltimore, MD 21236 4109318250 Fax 4109318256 www. acr. danfoss. com www. danfoss. comusic Refrigeration Air Conditioning Industrial Controls Components for Oil Burners Heating Controls GLENS FALLS, NY Danfoss Flomatic Valves 15 Pruyns Island Drive Glens Falls, NY 12801 8008332040 Fax 8003143155 EMail omaticomatic. com www. danfossomatic. com Water Controls LOVES PARK, IL Danfoss Drives 4401 N. Bell School Road Loves Park, IL 61111 8156398600 Fax 8156398000 www. namc. danfoss. com Drives Industrial Sales MILWAUKEE, WI 8800 W. Bradley Road Milwaukee, WI 53224 4143558800 Fax 4143556117 www. namc. danfoss. com www. na. water. danfoss. com Danfoss Graham HVAC Danfoss Water Wastewater Nessie Water Hydraulics MISSISSAUGA, ONT 7880 Tranmere Drive Mississauga, ON L5S 1L9 Canada 9056766000 Fax 9056760279 www. danfoss. ca Heating Controls Motion Controls SOMERSET, NJ Danfoss Bauer 31 Schoolhouse Road Somerset, NJ 08873 1212 7324698770 Fax 7324698773 www. danfoss. comdrivesus Gearmotors For More Information To nd out more about Danfoss North America, contact us viaemail at solutionsdanfoss. com Keep updated on all the latest news about Danfoss products and your industry at www. northamerica. danfoss. com. Log on today2007-07-03T12:34:52+02:00