Hot water system in BMS

The hot water system supplies heat to the building's air-handling unit or VAV box heating coils, along with the domestic hot water heating coils. The hot water system will have a boilers and pumps. Analog temperature sensors are placed in the hot water supply and return lines. Some type of mixing valve is usually used to control the heating water loop temperature. The boilers and pumps are sequenced on and off to maintain supply.