Flame rods have the following advantages.
Flame rod sensor circuit.
This video is part of the heating and cooling series of.
It does this by generating a potential voltage at the flame sensing terminal this terminal is connected to the sensor with a conductor.
This one explains the electronics behind the flame rod control system.
It is essentially fail safe.
Disconnect the flame sensor wire from sensor.
Troubleshoot flame sensor the flame sensor in any furnace proves combustion.
A special metal rod is mounted in the path of the flame.
To troubleshoot flame sensor.
If abnormal situations exist such as open circuits short.
The sensor needs to be cool to the touch when you clean it so it doesn t melt the scotchbrite pad and leave a residue on the flame rod.
This is known as a flame sensor or flame rod.
Quick response to flame failure.
Most every flame rod system i have worked on puts and ac voltage on the flame rod.
The flame rod in your picture is not a thermocouple.
Flame rods are found on nearly all induced draft burner systems and on many forced draft burners.
The other connection in the circuit is the flame being in contact with a metal surface that acts as a ground.
A special metal rod is mounted in the path of the flame.
Depending on the system this voltage may be between 80 and 300 volts.
Because of the flexibility of positioning a flame rod a pilot flame can be proven at the point of intersection with the main flame.
In a nutshell the flame rectification system is an electrical process that causes a low level dc current to be conducted from the.
When no flame.
Also some tips for servicing.
This is known as a flame sensor or flame rod.
If proof of flame is not present the icm will de energize the gas valve and retry for ignition or lockout.
Flame sensing rods stick out into the flame and connect back to the furnace board.
Connect a micro amp meter in series with this wire and the.
Once the board sends a call to the gas valve to open it monitors the current flow on the flame sensing rod.
In a nutshell the flame rectification system is an electrical process that causes a low level dc current to be conducted from the.
The cpfs circuit 31 of the flame detector generates a comparable microampere dc current in response to a flame pulse signal in the 10 500 hz frequency range so that the uv flame detector can be used in place of a flame rod sensor with an existing burner control combustion safeguard circuit.
Flame rods are found on nearly all induced draft burner systems and on many forced draft burners.
After cleaning you should reinstall the flame sensor and take another reading in order to see how much you improved flame signal.
