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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