What are they? Split systems have an indoor unit which provides heating and cooling and an outdoor unit which houses the heat rejection coil and compressors. Refrigerant is circulated between the indoor and outdoor units. These systems are most common in small buildings. Rooftop Package unit has heating, compressor, heat rejection and compressors all in one unit, and are typically mounted on the roof and connected to the occupied spaces via a duct through which the heated or cooled air is provided. Water cooled package units have heating, cooling and compressor mounted in a single unit mounted in the ceiling space of the occupied area, and reject heat to a condenser water loop which is cooled by a cooling tower and may also be heated by a boiler. All three of the above types may be [reverse cycle", whereby the refrigerant system can provide heating or cooling. Alternatively, the refrigerant system may provide cooling only while heating is provided by electric duct heaters or hot water coils. Advantages / Disadvantages - Low install cost. These system types are typically the cheapest to install - Moderate energy efficiency. These units tend to be designed for price rather than efficiency, although some quite efficient unit

The history of the HVAC industry dates back a lot further than most people imagine. In fact, did you know that the first HVAC equipment to come to light wasn`t called `HVAC` at all? HVAC stands for Heating, Ventilation, and Air Conditioning. The first methods used to make living more comfortable were very unconventional from what we know HVAC equipment to be today. As housing evolved over the years, so did the methods and ways we made indoor living more comfortable, supportive and healthy. Let`s take a look at some of highlights in the history of HVAC cooling system through the years. In The Beginning: Way back in ancient Greece and Roman times, homes (or villas) were kept warm by fires running in the home or under marble flooring. This was the beginning of residential heating. In the 14th century, fans started to be developed, but were being used to remove toxic gases from mines. Later, the concept of fans would be redesigned and used to ventilate homes and other structures. Also in the 14th century, chimneys were starting to be added to fireplaces and stoves to make for safer heating and better indoor air quality. In the mid 1800`s, resistance coils were invented and engineers discovered that coils got hot and would glow red when electricity was applied.

Computer Room Air Conditioner Units are essential inside data centers where cooling is necessary for all the computer and electrical equipment most data centers utilize. It is important to keep the equipment cool to prevent overheating for some equipment. Computer Room Air Conditioner Units - Types Removing the heat is the job of CRAC units in some cases and in other cases large Data centers use large air handlers to remove the heat, however, CRAC Units are the commonly used HVAC equipment used in most data centers for cooling data center equipment such as computers and electrical equipment. In a typical data center heat loads include servers, ups systems, power distribution units, static and automatic transfer switches, switchgear and other electrical equipment that produces heat during normal operation. Computer Room Air Conditioner Units - Types Some Computer Room Air Conditioners (CRAC Units) are DX with their own refrigeration systems built in while others rely on a chilled water system to provide chilled water to a coil in the CRAC unit. Most CRAC Units that are DX systems typically are used in smaller applications like branch offices and smaller types of data center set up where there are only one or a few servers to keep cool.

Processing milk requires pasteurization, a technique that destroys pathogens in milk and makes it safe to drink. Pasteurization necessitates the use of milk processing / dairy farm chillers to cool down the milk after the heating up process. If you run a dairy farm, you'll want to make sure to buy or rent a chiller that suits your needs well. Fortunately, there are dairy chillers that are ideal for almost any type of dairy farming operation. Chillers and Milk Processing To obtain milk, farmers take cows into a milking platform with individual stalls. The farmer assesses each cow's health and hooks up milking machines. Farmers closely assess utters for any signs of mastitis to prevent bad milk from making its way into the holding tank. Cows eat as milking machines automatically pump milk into a refrigerated tank, and milk then goes for pasteurization. This is when the dairy chiller comes into play because pasteurization heats milk. Water chiller remove heat from pasteurization and cool milk down to an appropriate temperature. Keeping milk at a cool temperature prevents the milk molecule from deteriorating. This preserves milk and extends storage life, which allows for time to transport it to the store. Two Varieties of Dairy Chiller The size of your operation has a lot to do with the type of dairy chiller you need. Older models of dairy chillers use a double walled tank with water and cooling coils that surround the milk tank. A compressor runs and builds ice around the coils in the double walled area. Once the ice reaches a certain thickness, the com

Condensers see use in various commercial applications, though you`re likely most familiar with the ones that reside in your HVAC cooling system. The component's primary objective is to essentially exchange heat (more specifically exchange heat due to refrigerant compression) in the loop of your air conditioning system, rejecting hot air in one of two methods. Method one is by way of air (air-cooled condenser), and two is by water (water cooled condenser). Which of these two your HVAC cooling system or heat exchange systems will utilize depends on a few important factors, and today Amrta Air Conditioning is here to discuss these in hopes of helping you make the right choice. What Is an Air Cooled Condenser? Air cooled condensers utilize ambient air in order to cool and cycle refrigerant. These can be readily seen oftentimes outdoors, as they are commonly used in residential and rooftop cooling systems, and are housed in your standard exterior unit. The advantage of choosing an air cooled system is that they: ● Are typically lower in initial purchase cost. Though there is a fair debate to be had on the matter, it i

How to choose the most suitable industrial chillers do, in fact, there is a selection formula is very simple: Cooling capacity = chilled water flow * 4.187 * temperature * Coefficient 1, the chilled water flow refers to the work of the machine required water flow rate, the unit must be converted to liters / sec; 2, temperature refers to the temperature difference between the machine out of the water; 3, 4.187 as quantitative (specific heat capacity of water); 4, select the air cooled chiller is required by the factor of 1.3, choose water cooled chiller is multiplied by coefficient 1.1. 5, according to the calculated cooling capacity select the machine model. Water chiller to go with the general habits on how to calculate the habit of using P, but the most important thing is to know the rated cooling capacity, the general air of 9.07KW look, then choose 3P machine. So on. Therefore, the selection of the most important industrial chillers are rated cooling capacity is obtained.

Chiller open, stop order to ensure that the air conditioner starts to run correctly , you must ensure that : ① Condenser heat well , otherwise they will be cold - condensing temperature and the corresponding condensation pressure is too high , so that the water chiller pressure protection device operation while parking , and even lead to failure. ② Evaporator water should circulate , otherwise they will be cold water temperature is low , resulting in cold temperature protection device operation while parking , or because the corresponding evaporation temperature and evaporation pressure is too low , is the low - voltage protection devices chiller operation and parking , even cause the evaporator freezing cold damage to the equipment . Therefore, chillers boot order: ( must be strictly observed ) cooling tower fan open - > cooling water pump open - > cold water pump open - > open chiller chiller shutdown sequence: ( must be strictly observed ) chillers stop - > cooling tower fan stops - > cooling water pump stops - > cold water pump stops Chiller Maintenance Considerations ① Shutdown, chillers should be shut down for half an hour before work , after work cold water pump shut down , help save energy , while avoiding downtime , protect the unit . ② Run the refrigeration cycle , you should confirm heating cycle pipeline valves have been closed .

Air Cooled Low Temperature Chiller - Features Low temperature chiller is a special low temperature environments dedicated chiller, its superior cooling capacity for hotels, restaurants, supermarkets and other commercial establishments. Chillers Food preservation , large cold meat, frozen seafood , frozen , ice fields , food processing chilled / frozen, pharmaceutical, chemical and other low-temperature environment to provide a reliable guarantee. (1) Product range, including high temperature ( water temperature -5 ℃), the temperature ( water temperature -10 ℃), low temperature ( water temperature -15 ℃) three series. (2) Highly optimized structure , the use of a heat exchanger plate support body , the structure is simple, compact and practical. (3) Best quality screw compressors perfect combination of high performance heat exchangers , energy efficiency up to 4.5. (4) Sec or stepless capacity control , precision with load changes . Water Cooled Low Temperature Chiller - Features Small water cooled chiller , cooling capacity, using the world famo

As a leader in the commercial refrigeration industry, Amrta HVAC Air Conditioning is committed to making a valuable contribution to protecting our environment through the responsible use of natural resources and the development of clean technologies to replace harmful substances with more environmentally friendly alternatives. The world is changing and so are market demands. With growing concerns about global warming and increasing harmful emissions into the atmosphere, industry is looking to alternative refrigerants as part of the solution. Hydrocarbon refrigerants are the next step towards better refrigeration and environmental responsibility. More than 2 billion HC fridges and freezers are used in homes worldwide.

Industrial refrigeration equipment is widely used in food and beverage production, cold storage, storage, chemical and medical industries, these industries need to raw materials and processing materials temperature control treatment. Changes in dietary habits and the development of international food trade are important factors that will drive the growth of the refrigeration equipment market in the future.However, fragmented supply chains in the food and beverage processing industry in developing countries will hamper market growth over the forecast period. Industrial refrigeration equipment is divided into compressors, evaporators, industrial shelves, heat exchangers and other products according to the application.Compressors, industrial shelves, and evaporators are the top three, with a combined market share of more than 62 percent.In addition, it is predicted that in the next few years, industrial shelves will be the fastest growing products. Key applications in the industrial refrigeration equipment market include food and beverage processing, chemical, medical, energy (natural gas), logistics (storage warehouses), and petrochemical products. Among them, food production and processing is the key application field. North America, Europe, Asia Pacific, Latin America, the Middle East and Africa a

1. Preparatory work before starting 1 ) Ensure that the unit and the controller is powered on . 2 ) Confirm the cooling tower fans, cooling water pumps, cooling water pumps are turned on. 3 ) Confirm the end of fan coil units are powered on. 2. Start 1 ) Press the status key on the keyboard , then the keyboard below the unit ON / OFF ( on / off ) toggle switch to ON (ON) position. 2 ) The unit will conduct a self-test , a few seconds later, a compressor start until load increases compressor starts after another . 3 ) Once the unit is started , all operations were not automatic. Unit according to the cooling load ( chilled water supply and return water temperature ) changes automatically start and stop. 3. Normal operation 1 ) Unit normal operation, the controller will monitor oil pressure, motor current and other parameters of the system, if there are any problems , the control system will automatically take the appropriate measures t