Oil burner control system with flue damper adapter circuit
An adapter circuit for retrofitting an oil burner control system with a flue damper includes a source of energy in circuit with the thermostat for energizing the damper motor in response to a call for heat to open the damper. A first relay in the adapter circuit includes a pair of contacts for simulating the operation of the thermostat contacts. When the damper is open, this relay is energized, and its contacts close, simulating the operation of the thermostat after the damper is opened, to energize the burner control circuit, thereby energizing the burner motor and ignition. A second relay in the adapter circuit senses whether the burner motor is energized; and when the burner motor is deenergized, this relay initiates a time delay after which the adapter circuit closes the damper.
- Assignee:
- Johnson Controls Inc
- Patent Number(s):
- US 4267965
- OSTI ID:
- 6092427
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
BURNERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DRAFT CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ENERGY CONSERVATION
EQUIPMENT
FLOW REGULATORS
FURNACES
OIL BURNERS
OIL FURNACES
THERMOSTATS