Reactive heating control system
First Claim
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1. A system for controlling the positioning of dampers within a variable air volume system when the supply air temperature rises above a predefined temperature level, said system comprising:
- a plurality of motors for positioning the dampers within the variable air volume system;
a plurality of sensors for sensing the temperature of the air supplied to each damper within the variable air volume system;
a plurality of programmable zone control units, each connected to a respective motor and to a sensor so as to normally control the positioning of the damper and further monitor the temperature of the air supplied to each damper that is sensed by the respective sensor;
a master programmable control unit connected to each programmable zone control unit said master programmable control unit having a stored program therein for successively reading the sensed temperatures of the air supplied to each damper from the programmable zone control units and for comparing the highest sensed temperature with a predetermined limit for sensed supply air temperature, said programmable master control unit being operative to send a warning to each of said programmable zone control units within the variable air volume system when the temperature of the air sensed by any sensor is higher than the predetermined limit of supply air temperature.
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Abstract
Method and apparatus are disclosed for responding to an unpermissible rise in the supply air temperature in any zone of a variable air volume system. A warning is generated to a controller in each zone which adjusts the air flow to the zone within predetermined limits. Different adjustment occur depending on whether the temperature of the space being heated is below the zone setpoint or above the zone setpoint.
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Citations
26 Claims
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1. A system for controlling the positioning of dampers within a variable air volume system when the supply air temperature rises above a predefined temperature level, said system comprising:
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a plurality of motors for positioning the dampers within the variable air volume system; a plurality of sensors for sensing the temperature of the air supplied to each damper within the variable air volume system; a plurality of programmable zone control units, each connected to a respective motor and to a sensor so as to normally control the positioning of the damper and further monitor the temperature of the air supplied to each damper that is sensed by the respective sensor; a master programmable control unit connected to each programmable zone control unit said master programmable control unit having a stored program therein for successively reading the sensed temperatures of the air supplied to each damper from the programmable zone control units and for comparing the highest sensed temperature with a predetermined limit for sensed supply air temperature, said programmable master control unit being operative to send a warning to each of said programmable zone control units within the variable air volume system when the temperature of the air sensed by any sensor is higher than the predetermined limit of supply air temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for controlling the positioning of dampers within a variable air volume system when the supply air temperature rises above a predefined temperature level, said system comprising the steps of:
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controlling the positioning of dampers within the variable air volume system; reading the respective temperatures of the air supplied to each damper; determining the highest temperature from among the respective temperatures that have been read; comparing the highest sensed temperature with a predetermined limit of supply air temperature; and warning controllers which position the dampers within the variable air volume system when the sensed temperature of the air supplied to at least one damper is higher than the predetermined limit of supply air temperature. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for responding to a change in temperature of the air being supplied to a plurality of individual zones to be heated, each zone having a controller for controlling the flow of heated air to the zone, said system comprising:
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a master controller for determining the highest supply air temperature in any of the zones; a communication link between said master controller and said zone controllers in each zone for sending a warning signal to each zone controller when the highest zone supply air temperature is greater than a predetermined limit of supply air temperature; and a program within each zone controller for adjusting the flow of air to the respective zone upon receipt of the warning signal. - View Dependent Claims (22, 23)
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24. A process for responding to a change in temperature of the air being supplied to a plurality of individual zones to be heated, each zone having a controller for controlling the flow of air to the zone, said system comprising the steps of:
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determining the highest supply air temperature in any of the zones; sending a warning to each zone controller when the highest zone supply air temperature is greater than a predetermined limit of supply air temperature; and adjusting within each controller the flow of air to the respective zone upon receipt of the warning. - View Dependent Claims (25, 26)
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Specification