Automatic thermostat set-back control system
First Claim
1. A set-back control system for a building or the like having a primary zone, a control circuit including a thermostat connected to an associated source of electric power for controlling the temperature in said primary zone corresponding to an occupied condition, normally closed relay means in said control circuit for connecting said control circuit to said associated source of electric power in accordance with the setting of said thermostat in said control circuit, circuit means arranged to be connected to an associated source of electric power for energizing said relay means, said circuit means including a timer for periodically connecting said circuit means to said associated source of electric power and a primary thermostat responsive to the temperature in said primary zone corresponding to an unoccupied condition, said thermostat in said circuit means being arranged to respond to the temperature in said primary zone for connecting said relay means to said associated source of electric power when said circuit means is connected to said associated source of electric power by said timer to disconnect said control circuit from said associated source of electric power whereby the temperature in said primary zone is maintained at a desired unoccupied level.
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Accused Products
Abstract
A set-back control is disclosed which operates relays which are wired in series with heating, ventilating and air conditioning control circuits to effect reduction of energy to maintain building temperatures on a scheduled basis.
8 Citations
9 Claims
- 1. A set-back control system for a building or the like having a primary zone, a control circuit including a thermostat connected to an associated source of electric power for controlling the temperature in said primary zone corresponding to an occupied condition, normally closed relay means in said control circuit for connecting said control circuit to said associated source of electric power in accordance with the setting of said thermostat in said control circuit, circuit means arranged to be connected to an associated source of electric power for energizing said relay means, said circuit means including a timer for periodically connecting said circuit means to said associated source of electric power and a primary thermostat responsive to the temperature in said primary zone corresponding to an unoccupied condition, said thermostat in said circuit means being arranged to respond to the temperature in said primary zone for connecting said relay means to said associated source of electric power when said circuit means is connected to said associated source of electric power by said timer to disconnect said control circuit from said associated source of electric power whereby the temperature in said primary zone is maintained at a desired unoccupied level.
Specification