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This morning, ISH China & CIHE - China (Beijing) International Heating Ventilation and Air Conditioning, Sanitary Ware and Urban Construction Equipment and Technology Exhibition (referred to as ISH Beijing Heating Exhibition) opened at the China International Exhibition Center (New Hall). This year's show brought together thousands of international brands in the industry, which will showcase t...
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The three-day Asian HVAC industry's annual event, the Beijing ISH China Heating Show, came to an end today. This year's Beijing ISH Heating Exhibition brought together more than 1,300 quality HVAC companies, attracting more than 75,000 Chinese and foreign visitors. Such a grand event, how can the "resident guests" of the ISH exhibition be absent? At the exhibition, Senwei brought the two types of ...
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Thermostat is a device that keeps the temperature in a water heater at desired level by cutting off power supply once the desired temperature is achieved. Slightly different from the air conditioner thermostat, job of the thermostat in water heaters is to make sure that the water is heated till a particular temperature and there after the water heater needs to shut off. Thermostat keeps checking t...
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HVAC Controls
Mar 21, 2022
Controls for heating ventilating and air conditioning (HVAC) cover a broad range of products, functions, and sources of supply. We define control as the starting and stopping or regulation of heating, ventilating, and air conditioning. Our concern here is control devices and systems to control larger commercial and industrial HVAC systems, not residential heating and cooling, except in a few cases...
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The application of HVAC controls starts with an understanding of the building and HVAC systems, and the use of the spaces to be conditioned and controlled. The type of HVAC system determines the control sequence. Several types of control products such as pneumatic, electric, analog electronic, or electronic direct digital control (DDC) can then do the basic control sequence. The way buildings are ...
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HVAC systems are classified as either self-contained unit packages or as central systems. Unit package describes a single unit that converts a primary energy source (electricity or gas) and provides final heating and cooling to the space to be conditioned. Examples of self-contained unit packages are rooftop HVAC systems, air conditioning units for rooms, and air-to-air heat pumps. Central systems...
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