Combustion Catalog | Fives North American

General principals of operation


Once the burner is lit the igniter must be retracted into a thermally safe, and air purged location. When retracted the igniter tip should be near the entrance of the burner pilot boss. Four (4) inches or more from the hot face is ideal.

Read and understand all documentation and manuals before using the 4058. Follow all instructions and safety precautions included in all 4058 bulletins and sheets, as well as the installa- tion and the operation manuals for the SmartSpark™ exciter or any other ignition system used in the 4058. Fives North Amer- ican Combustion, Inc. urges compliance with National Safety Standards Insurance Underwriters recommendations, and care in operation. The user must conform to all applicable electrical, mechanical, piping, and other codes in the installation, operation, or repair of these devices. Please contact Fives North American Combustion, Inc. if there are any questions or concerns regarding the safe installation, operation, repair, or maintenance of this equipment. IGNITER TIP PLACEMENT For lighting natural gas or propane burners the 4058 should be configured so that when fully extended the tip of the igniter is in a location downstream of the stabilizer, and not in the direct path of high velocity air. Both fuel and air must be present, but generally it is best to spark at the edge of the fuel stream or in a re-circulation zone where both fuel and air are being pulled back towards the stabilizer, like the area between air holes, or down- stream of a perforated plate stabilizer. Atomized oil streams usually have a narrower stream than gas so the igniter will likely need to be extended further into the burner than for gas burners to get good lighting. If the burner is dual fuel design the igniter tip should be positioned for oil lighting.

High Velocity Air Flow

A Good Spark Location

Fuel Nozzle

Figure 5: Typcial 4058 Igniter Tip Placement


Ignition initiation timing, cylinder position sequencing and position confirmation must be handled by the burner management system according to local regulatory requirements, but in general: — The burner management system determines it is safe to start the burner and initiates an ignition cycle. Sparking can begin during igniter insertion and continue until it is retracted. Energizing the 4058 solenoid, advances the cylinder rod. An optional integrated position switch may be used to confirm that the ignition position has been reached. — After energizing the igniter, the fuel valve is enabled to induce fuel to the burner. If a UV is used for flame supervision, it may “see” the spark as the burner flame, so it may be necessary to provide a few seconds of guaranteed ignition time to give the fuel time to light off the spark. — Once the flame supervision has proven that the flame is on, the solenoid is de-energized, allowing the igniter assembly to retract into a benign location within the burner ignition tunnel. An optional second position switch may be used to confirm that the igniter has reached the fully retracted position. — In some applications, it is best to have the igniter tip moving through the entire cylinder range of motion during the trial for ignition to find a good lighting location. In this case, energize the exciter, the cylinder, and the fuel valve at the same time so that the spark travels through the fuel/air mix to find a combustible region.


Retracted Cylinder Rod End Location

Adapter Length

Retraction Depth

Spark Location

Insertion Length

Insertion Depth

Figure 4: Typcial 4058 Igniter Tip Placement

Bulletin 4058 page 3

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