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what is intermittent ignition

by Imelda Morissette DVM Published 3 years ago Updated 3 years ago

INTERMITTENT DUTY IGNITION is defined by Underwriters Laboratory (UL) as “ignition by an energy source that is continuously maintained throughout the time the burner is firing.” (UL 296, Paragraph 4.22). In other words, the ignitor is on the whole time the burner is firing.

Intermittent Pilot Ignition is an electronic system, which uses an electrode to ignite the pilot gas. In turn, the pilot flame lights the main burner gas. The term Intermittent is used because the pilot burner flame is only present when the main burner is operating.

Full Answer

What is an intermittent ignition system?

Oil burners use either interrupted or intermittent ignition systems. In an interrupted ignition system, the spark is active for a brief time at the start of the operating cycle, then turns off once there’s a flame. In an intermittent ignition system, the spark stays on while the burner runs.

Can you help with an intermittent starting problem?

In this case, it's important that you contact a mechanic as soon as possible so they can determine what is causing the intermittent contact. In many cases an intermittent starting problem is linked to a bad wire connection that may become dirty due to exposure under the hood.

What would cause intermittent spark?

What are the indicators of a foul ignition coil?

  1. Backfiring.
  2. Poor Gasoline Economic system.
  3. Engine Misfiring.
  4. Car Stalling.
  5. Engine Jerking, Tough idling, Poor Energy.
  6. Test Engine Gentle On / DTC Code.
  7. Engine Arduous Beginning.
  8. CNP Coil Sort.

What are intermittent issues?

SALT LAKE CITY, Utah, Aug. 19, 2021 (Gephardt Daily) — Salt Lake City’s 911 line is experiencing intermittent issues with incoming calls Thursday, which may be weather-related. Salt Lake City ...

What is an intermittent ignition source?

Intermittent/continuous ignition source means an ignition source that is ignited or energized upon appliance user initiation of the operational cycle, that remains continuously ignited or energized during the operational cycle, and that is extinguished or deenergized when the operational cycle is completed. Sample 1.

What is the main difference between standing pilot and intermittent ignition?

The intermittent pilot light is an electric system, designed to combat some of the biggest flaws of the standing pilot. Rather than keep a flame burning all the time, the intermittent pilot only lights when needed. The system responds to the command for heat by using an electric spark to ignite the flame.

What is an intermittent gas valve?

The intermittent pilot combination gas valves by Resideo are used in gas-fired appliances on natural gas. These reliable controls include a safety shutoff, a manual valve, two automatic operators, a pressure regulator, and a pilot adjustment.

What is meant by the term intermittent ignition on an oil burner system?

INTERMITTENT DUTY IGNITION is defined by Underwriters Laboratory (UL) as “ignition by an energy source that is continuously maintained throughout the time the burner is firing.” (UL 296, Paragraph 4.22). In other words, the ignitor is on the whole time the burner is firing.

How are most intermittent pilots lit?

Most modern furnaces use an intermittent pilot, in which gas is fed to the burner assembly as needed, and it is lit via a spark or hot surface ignition. Hot surface ignition uses silicon carbide, a material that reaches extremely high temperatures when energized, up to the ignition temperature of gas.

What is the main difference between a DSI system and an HSI system?

HSI controls perform a similar ignition sequence to that of DSI controls, but rather than a spark, the device that ignites the gas is a "heated element" often called a "glow bar" similar to that used in a diesel engine.

Can a flame sensor be intermittent?

The flame sensor is a safety component that detects whether or not there is a flame in the combustion chamber. If this sensor is dirty, the dirt can cause the sensor to operate intermittently. When this happens, your furnace will most likely light, but because the sensor can't properly detect if a flame is present.

What is the difference between a standing pilot automatic gas valve and an intermittent pilot automatic gas valve?

There are several methods of accomplishing ignition in modern gas heating equipment: Standing pilot systems have a pilot burner that is on all the time. 1. Intermittent pilot systems light the pilot on each call for heat.

What is an intermittent pilot ignition system quizlet?

What is an intermittent pilot ignition system? The gas pilot is ignited with each call for heat and shut off at the end of the call. Gas valves for an intermittent pilot system? Have both a pilot valve and a main valve.

How do I know if my oil furnace ignitor is bad?

Your furnace won't run: The most obvious sign that your ignitor is bad is that it won't ignite, and this generally manifests itself in your furnace failing to run when you activate it. One word of caution, though: this can also be caused by other issues, some of which are electrical.

How do I reset my electronic ignition furnace?

How to Reset an Electric FurnaceFirst, turn off the power supply to the furnace by turning off the breaker in the circuit box.Locate the reset button on the furnace and press it to reset the furnace. ... If the button is popped up, press it down.Return the cover to the blower compartment and turn the power on.

What causes ignition failure on a furnace?

As mentioned above, sometimes the cause of a furnace ignitor failing to ignite is due to a safety issue, such as a clogged air filter, for instance. Air filters should be changed on a regular basis, to prevent these kinds of problems. However, a lot of furnace owners fail to do this.

Why does my pilot light stay lit?

The pilot light stays lit 24/7, consuming fuel even when you aren’t using the heater. It’s a small flame, but when you consider the months that you likely aren’t using your heater it can add up quickly. The second issue is the pilot light’s propensity for blowing out.

What is a standing pilot light?

The standing pilot light is the traditional ignition source for most natural gas-fueled combustion heating systems. It is comprised of a small burner, a gas valve to supply the burner, and a thermocouple. When the pilot light is first lit, usually by a button on the outside of the heater, the thermocouple registers the heat ...

What is interrupted duty ignition?

INTERRUPTED DUTY IGNITION is defined by Underwriters Laboratory (UL) as “an ignition system that is energized each time the main burner is to be fired and de-energized at the end of a timed trial for ignition period or after the main flame is proven to be established .” (UL 296, ...

Why do all ignitor transformers fail?

Almost all ignitors are duty rated for constant ignition. But they will fail due to excess heat and improper grounding. So proper grounding and post purge help a lot. Interrupted ignition, with the old style transformer is the way to go for me (yeah they are heavier).

Does Riello have intermittent ignition?

Most will recycle or 'scavanger' with loss of flame by trying to fire again before locking out. But just know , it can be a new control and programmed to be constant (intermittent) ignition.

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