Abstract: The invention is directed to an ignition control system that dynamically adjusts the warm-up time of an igniter within a predetermined range depending on the success or failure of the previous ignition or start-up cycle. The system activates the igniter and waits a predetermined or computed warm-up time. At the end of the warm-up time, the system opens a gas valve. The system then waits a preset time from the opening of the gas valve to determine whether ignition was successful or not. If the ignition was successful, the system computes a new igniter warm-up time by decrementing the current time and stores this new value for use during the next start sequence. If the ignition was unsuccessful, the system computes a new warm-up time by incrementing the current value and retrying the start sequence. Preferably, a successful ignition is always determined by checking for the presence of flame a fixed time following the opening of the gas valve.

Abstract: The invention is directed to an ignition control system that dynamically adjusts the warm-up time of an igniter within a predetermined range depending on the success or failure of the previous ignition or start-up cycle. The system activates the igniter and waits a predetermined or computed warm-up time. At the end of the warm-up time, the system opens a gas valve. The system then waits a preset time from the opening of the gas valve to determine whether ignition was successful or not. If the ignition was successful, the system computes a new igniter warm-up time by decrementing the current time and stores this new value for use during the next start sequence. If the ignition was unsuccessful, the system computes a new warm-up time by incrementing the current value and retrying the start sequence. Preferably, a successful ignition is always determined by checking for the presence of flame a fixed time following the opening of the gas valve.

Abstract: A blowerless air conditioning or heat pump system for use in providing conditioned air includes an outdoor section that is preferably coupled to an indoor section, and is advantageously used with a forced hot air furnace and a corresponding air distribution duct system of a home or building. The two sections are preferably installed along a boundary of the home or building such that outdoor section is outside of the home and the indoor section is inside or below the home and proximate to a forced hot air furnace. Disposed within the outdoor unit are a compressor, an outdoor coil and an outdoor fan. Disposed within the indoor section is an evaporator coil. There is no separate fan or blower disposed within the indoor section. An inlet air tube couples the indoor section to a first point in the air distribution system, and an outlet air tube couples the indoor section to a second point in the air distribution system. The second point is downstream of the first point relative to the furnace.

Abstract: A blowerless air conditioning or heat pump system for use in providing conditioned air includes an outdoor section that is preferably coupled to an indoor section, and is advantageously used with a forced hot air furnace and a corresponding air distribution duct system of a home or building. The two sections are preferably installed along a boundary of the home or building such that outdoor section is outside of the home and the indoor section is inside or below the home and proximate to a forced hot air furnace. Disposed within the outdoor unit are a compressor, an outdoor coil and an outdoor fan. Disposed within the indoor section is an evaporator coil. There is no separate fan or blower disposed within the indoor section. An inlet air tube couples the indoor section to a first point in the air distribution system, and an outlet air tube couples the indoor section to a second point in the air distribution system. The second point is downstream of the first point relative to the furnace.

Abstract: An open front refrigerated display case having an improved ambient air defrost system which includes a housing with a display compartment area for displaying articles therein and an open front area to facilitate placement and removal of the articles, a main refrigeration duct extends throughout the housing having a primary inlet above the open front area and a primary outlet defined below the front area, a primary refrigeration coil is positioned within the primary refrigeration duct for cooling of air passing therethrough and a primary fan device is positioned within the primary refrigeration duct to facilitate drawing of air through the air inlet and expelling of refrigerated air through the air outlet in such a manner as to form an air curtain across the open front area. An ambient air defrost system is included having an ambient air circulation device such as a fan and an ambient air drive means for powering thereof.