As long as there is a pilot light the following sequence is typical of most standing pilot gas furnace systems.
A standing pilot in a conventional gas furnace.
A standing pilot gas furnace uses a small continuously burning flame as a source of ignition for the main gas burner.
This flame called a pilot light burns a constant flow of a small amount of gas.
Closes the gas valve if the furnace overheats.
The gas furnace in your home is a critically important appliance and one you depend on to work reliably efficiently and quietly.
The orifice is a precisely sized hole in the.
The limit switch is a safety device that.
Standing pilot gas furnace sequence of operation.
A standing pilot in a conventional gas furnace.
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A conventional standing pilot gas furnace consists of a naturally aspirating gas burner draft hood a solenoid operated main.
A thermocouple is used in a conventional gas furnace as a.
Closes the gas valve if the furnace overheats.
Conventional gas furnaces are those rated up to 89 afue annual fuel utilization efficiency.
The sequence of operation varies from manufacturer to manufacturer and system to system but the following represents the most common sequence of operation for standing pilot gas furnaces.
A thermocouple is used in a conventional gas furnace as a.
Electronic ignition vs standing pilot modern gas furnaces use electronic ignition systems to light the burners in modern furnaces.
The majority of residential gas furnaces in use today are still the conventional standing pilot types although they are gradually being replaced by the more efficient mid efficiency and high efficiency furnaces figures 11 2 and 11 3.
The limit switch is a safety device that.
Whether your interest is in knowing more about your current furnace or making a wise choice for a new furnace the issue of fuel efficiency is central to any discussion of home furnaces.
The orifice is a precisely sized hole in the.
These are often old furnaces that have standing pilot lights and they are usually noncondensing furnaces that vent exhaust gases through chimneys rather than through pvc piping.
A standing pilot gas furnace is equipped with a naturally aspirating gas burner a draft hood a solenoid operated main gas valve a continuously operating pilot light standing pilot a thermocouple safety device a 24 volt ac transformer a heat exchanger a blower and motor assembly and one or more air filters.
