×

Integrated furnace control and control self test

  • US 4,872,828 A
  • Filed: 09/10/1987
  • Issued: 10/10/1989
  • Est. Priority Date: 09/10/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. An integrated control for a gas-fired furnace system of the type having at least a relay controlled pilot gas valve, a relay controlled main gas valve, an inlet gas pressure sensor, an inducer fan for forcing air through a combustion chamber in the furnace, means for sensing inducer fan forced air flow through the combustion chamber, a blower fan for circulating air through the furnace, a thermostat for providing a comfort setting signal to the control, a hot air temperature sensor for controlling the blower fan, and means operable in response to inputs from said sensors and sensing means and said thermostat to control said valves so as to operate said furnace in a safe manner, the integrated control comprising:

  • first means for sequentially testing a plurality of the above recited furnace components prior to an attempt to ignite the furnace, second means for sequentially testing said plurality of furnace components during furnace operation, and manually operable means for sequentially testing said plurality of furnace components at times other than prior to an attempt to ignite the furnace and during furnace operation.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×