0
AC voltage(at least 90vac) pass through the flame sensor and the ionization of the flame creates or rectifies the voltage to DC and a small microamp that can be measured with a meterl.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
How does a gas furnace pilot flame stay burning?
with gas? hence gas furnace? theres a gas pipe that puts the gas into 3-4 tube things tht keep lit by the gas bruhhh
Can you melt gold in a furnace?
You can melt gold with something as simple as a gas flame - you dont actually need a furnace. Gold melts at just over 1000 degrees Celsius (1064oC) - Most natural gas flames (from a bunsen burner for example) are much hotter than that.
What color is a gas flame that is starved of oxygen?
This is a red flame.
What does it mean if the flame on a gas water heater is burning yellow?
When a flame on a gas water heater is burning yellow it means that the gas has carbon. It can also mean that the gas has sodium.
What is the lifespan of a gas furnace thermocouple?
2 years
What is flame rectification?
Flame rectification is DC electrical circuit that sends a very small voltage (rated in micro amps) from the furnace electronic board up through the pilot electrode. When pilot flame is established the flame acts as a path (conductor) which allows the DC current to flow from the flame rod to ground completing the circuit. This completed signal tells the electronic board it's ok to allow the main gas valve to open . Now your furnace pilot, or hot surface ignitor will start the main flame . To put it simple, flame rectification is an electronic way to prove pilot flame before opening the main burner gas valve. It's a safety circuit to prevent the main burner gas valve from opening if there isn't apilot flame, or hot surface ignitor established.
What does a yellow flame indicate on a gas furnace?
its hot!
Seguence of operation for a direct ignition gas furnace?
If the furnace is direct ignition, The HSI or spark ignites the flame. A flame sensor passes current through the flame, if current is present the main.
Where is the furnace pilot located?
The gas furnace pilot (flame is lit all the time) is sometimes referred to as a pilot light, but no matter what you call it, its purpose is to serve as a small ignition flame for the gas burner. And when this little flame fails to operate properly or go out, it's one of the most common reasons a gas furnace will fail to operate.
On a gas furnace what energizes the blower motor in heat mode?
flame sensor
How does a gas furnace pilot flame stay burning?
with gas? hence gas furnace? theres a gas pipe that puts the gas into 3-4 tube things tht keep lit by the gas bruhhh
How does a flame sensor works?
A flame sensor is a safety mechanism installed on gas furnaces. It is located directly between the burners and the gas supply. When your gas kicks on, the flame sensor MUST detect a flame. This safety mechanism is to prevent your house from filling up with un-lit gas. Even if your burners are igniting, if your Flame Sensor is dirty (covered in carbon from typical use) it will fault out, thus shutting off the furnace over and over. If this is the case, your furnace will kick on every 2 minutes (because the thermostat tells it your house is too cold) and then will shut off after 5 or 10 seconds as a result of the Flame Sensor Fault.
How does a flame rod work?
The main circuit board in your furnace sends a small ac signal to the flame rod so now you have an ac potential from the body of the furnace to the flame rod, When the flame comes on between the body of the furnace and the rod it rectifies the ac in to dc, The flame actually acts like a diode. When this dc voltage is sensed by the control board it knows there is a flame present and thus keeps the gas valve on. Hope this helps
What is pilot gas in a furnace?
Pilot gas is the very small flow/burner used to maintain an ignition flame in a gas appliance. Sometimes called a pilot light, or pilot flame, it's used to ignite the main burner.
How does a natural gas furnace work?
Natural gas furnaces work by combining natural gas with air and lighting it. This results in a flame that heats up the air and warms the rest of the house.
what dose a yellow flame mean on a gas furnace?
Yellow flames from a natural gas furnace indicate that the combustion ratio is off and you have too much excess air in the mixture, if the discolored flame is isolated in the burner meaning on only 1 out of 3 or more then the burner/orifice may be out of alignment or there maybe a crack in the exchangers cell.
How do you identify an electric furnace from a gas furnace?
an electric furnace runs off of 208/230 Volts while a typical gas furnace runs off of 120 also a gas furnace will have a valve for the gas relay where the gas enters the furnace.
