HONEYWELL 621-9934 Module

New original DCS Module 621-9934 In Stock

Description 

The heating capacity required for a building depends on the design temperature, the quantity of outdoor air used, and the physical activity of the occupants. Prevailing winds affect the rate of heat loss and the degree of infiltration. The heating system must be sized to heat the building at the coldest outdoor temperature the building is likely to experience (outdoor design temperature). Infiltration is the process by which outdoor air enters a building through walls, cracks around doors and windows, and open doors due to the difference between indoor and outdoor air pressures. The pressure differential is the result of temperature difference and air intake or exhaust caused by fan operation. Heat loss due to infiltration is a function of temperature difference and volume of air moved. Exfiltration is the process by which air leaves a building (e.g., through walls and cracks around doors and windows) and carries heat with it. Infiltration and exfiltration can occur at the same time. Ventilation brings in fresh outdoor air that may require heating. As with heat loss from infiltration and exfiltration, heat loss from ventilation is a function of the temperature difference and the volume of air brought into the building or exhausted.

About Us

High Five PLC Parts Limited for many years, is a professional engaged in large-scale system (distributed control system, programmable controller, redundant fault-tolerant control systems, robot control system, large servo control system is the central feeding system plastic molding auxiliary equipment and automation of whole plant planning) imported automation system such as spare parts, modules, sales and system integration of high-tech enterprises. The company is equipped with professional technicians to provide customers with better service.

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We double check and test the goods before shipping, we have experienced and   dedicated technical staff for inspecting every module and card as to ensure the end user use them perfectly without any probelm and added trouble.

We help customer save cost with high quality and comparative price. We care about what customer care, and see the end user's benefits as important, we would like to build long-term business relationship with customers.