Patent ID: 8931438
Filing Date: 2015-01-13
Classification: F24H,Y02B

Abstract:
1. A condensing fuel-fired appliance having a fuel burner configured to generate flue gas, the condensing fuel-fired appliance being configured to shut down the fuel burner in response to a sensed condition, the condensing fuel-fired appliance also having a condensate trap positioned to collect condensate from the flue gas, the condensate trap comprising: a trap body substantially enclosing an interior region; a float positioned for movement within the interior region of the trap body; a flue gas inlet port defined by the trap body for the introduction of flue gas into the interior region of the trap body; a condensate outlet port defined by the trap body for the discharge of condensate from the interior region, the condensate outlet port defining a seat surface for contact with the float; a flue gas outlet port defined by the trap body for the discharge of flue gas from the interior region of the trap body, the flue gas outlet port defining a seat surface for contact with the float; wherein the float is configured to move in response to condensate collected in the interior region of the trap body to a position contacting the seat surface defined by the flue gas outlet port and to substantially block the discharge of flue gas from the interior region through the flue gas outlet port; and wherein the float is configured to move to a position contacting the seat surface defined by the condensate outlet port and to substantially block the discharge of flue gas from the interior region through the condensate outlet port when there is little or no condensate in the interior region of the trap body.