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AD 2000™ Applications

1. Steam Heating System

The AD 2000™ sensor averaging system is used to control steam heating boilers. Unlike other boiler controls which operate as a function of outside air and condensate return temperatures, the AD 2000™ monitors space temperature.

Using the indoor average temperature readings from up to 16 remote locations provides a direct relationship between building heat loss and the length and frequency of boiler operation.The AD 2000™ accounts for heat loss due to wind factors, windows, walls and roof. Rather than setting a fictitious parameter that is supposed to represent temperature, or the hit-and-miss method of experimenting with increase/decrease settings, the user of the AD 2000™ sets the actual average temperature for the building in degrees Fahrenheit.

2. Hydronic Heating System

Many hot water heating systems operate at a set maximum temperature regardless of outside air temperature. Since the boiler must be sized to compensate for winter’s coldest days, its heating output is excessive during moderate and mild temperatures. The boiler will heat the circulating water to the hottest temperature, even though the demand for heat varies as outdoor temperature changes. This results in energy waste and inconsistent indoor temperatures.

The microprocessor-based AD 2000™ combats this situation by controlling the circulating hot water temperature based on outdoor air temperatures. Comfortable living conditions are maintained by varying the circulating water temperature in response to outdoor temperature changes. This function, called Reset, customizes the heating system to produce only enough heat to match the heat loss of the building. The reset function combined with night setback and outdoor cutoff can provide the owner with maximum energy savings and minimal adjustment.

3. Domestic Hot Water Heating System

Hot water systems using a setpoint aquastat as an operating control maintain a constant temperature 24 hours per day.  This constant temperature (typically 120-140 degrees) is typically set so that no "lack of hot water" complaints are made during the peak usage times of day.  Peak usage commonly occurs only 3 or 4 hours per day, the rest of the time water is heated, and reheated to an unnecessarily high temperature. 

The setpoint aquastat doesn't respond to changing usage.  The AD 2000™ automatically adjusts hot water temperature so that only the amount needed is provided, which can achieve considerable energy savings and extend equipment life.

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