MAXFire
®
Series 100 Gas Igniters Manual
372001-04 Rev. C
5
Section 4 Installation
4.1 Mount Tube / Guide Tube
Typically, the mount tube is fixed permanently to the burner front plate and supports the igniter assembly.
The design of the MAXFire
®
igniter allows the user to weld the guide tube directly to the burner front plate,
if desired.
1.
Cut a hole through the burner front plate in the location desired or as indicated on the installation
drawing. The diameter of the hole should be slightly larger than the outside diameter of the mount
tube.
2.
Insert the mount tube through the front plate and into the burner area. Support the mount tube at the
position and penetration angle required or indicated on the optional installation drawing. During
retrofit or replacement applications, insert the MAXFire
®
igniter to the same location as the
previous igniter. As a general rule, the tip of the igniter should be 3 inches (±
1
/
8
”) behind a vertical
plane through the position of the main burner fuel nozzle.
3.
Seal-weld the mount tube to the burner front plate. On some older installations where cast iron
plates must be penetrated, a steel flange or cover plate can be bolted to the cast iron, so that the
mount tube can be welded to that flange or plate. When installing the guide tube, avoid contact with
internal burner parts, such as air vanes or burner sleeves. Occasionally, air vanes may have to be
trimmed in order to provide clearance for the mount tube.
4.
Before tightening the mount tube squeeze collar, rotate the guide tube to accept flexible hose
connection for cooling/combustion air. Tighten the nuts of the squeeze collar to hold the guide tube
securely in position.
5.
Before inserting the guide tube into the mount tube, inspect the primary combustion region for
cleanliness and check the position of the spark rod tip. Figure 4-1 illustrates the correct position of
the spark rod tip.
Figure 4-1 Igniter Tip Arrangement
Baffle Plate
Igniter Guide
Tube
Orifice Tube
Spark Rod Tip
Spark rod tip positioned
1
/
16
”
through the baffle plate
Igniter Firing
Tip
Fuel Transport
Tube
