Trap assembly for a condensing fossil fuel furnace

Patent · Tue Mar 08 04:00:00 EST 1988

OSTI ID:5126238

Shellenberger, T J

This patent describes a furnace of the type including a heat exchanger with a combustion chamber for combusting a fuel and air mixture; means for introducing a fuel and air mixture to the chamber; means for igniting the fuel and air mixture; a combustion product plenum connected to the chamber for directing combustion products from the combustion chamber to a flue gas exhaust passage; a fluid drain conduit for draining combustion product condensate from the combustion chamber and the plenum. The improvement comprises in combination: a trap assembly for the drain conduit, a vertical tube sealed at its lower end and having a side wall, a condensate float in the tube, pressure sensing means connected to the plenum; and switch means responsive to the pressure sensing means for terminating operation of the means for introducing a fuel and air mixture to the chamber of the furnace whenever the cap closes the flue gas outlet and thereby changes the pressure in the plenum.

• Assignee: Rheem Manufacturing Co., New York, NY
• Patent Number(s): US 4729328
• OSTI ID: 5126238
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
COMBUSTION CHAMBERS
COMBUSTION CONTROL
COMBUSTION PRODUCTS
CONDENSATES
CONDENSERS
CONTROL
DRAINAGE
ELECTRICAL EQUIPMENT
EQUIPMENT
EXHAUST SYSTEMS
FLUE GAS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
FURNACES
GASEOUS WASTES
HEAT EXCHANGERS
OPERATION
PRESSURE CONTROL
PRESSURE MEASUREMENT
SWITCHES
WASTES