Combustion Catalog | Fives North American

Product Overview | 4055 Igniters

4055-#-P FIXED LENGTH IGNITERS WITH 1/8" NPT PURGE AIR INLET 4422 burners with pilot ignition can operate with more excess air than 4422 burners that use direct spark ignition. This is because the pilot air (200-300 scfh or 5.6-8 Nm 3 /h is typical) helps make 4422 burners more stable when running at high excess air rates. The 4055-#-P has a built in 1/8" NPT air connection where purge air can be added to simulate the additional air from a premix pilot while still using direct spark ignition.

Except for the purge hole, 4055-#-P igniters are the same as the standard fixed length 4055-# igniters. The 4055-#-P igniters were previously available as part number 4-16381-1, -2, -3, -4 or -5, with a R520-4170-V O-ring. The O-ring is not included with the 4055-#-P.

A

.38 (9.5)

Z

1⁄8 " pipe tap

.09 (2.4) gap

¾ " NPT

.69 (17.5)

4055-#-P DIMENSIONS inches (mm) and SPARE PARTS

Designation

"A" Dimension "Z" Dimension

Electrode 4-7865-2 4-7865-1 4-7865-1 4-7865-3 4-7865-4

Adapter 4-16382-1 4-16382-2 4-16382-1 4-16382-1 4-16382-1

.81 ( 21 )

4055-A-P 4055-B-P 4055-C-P 4055-D-P 4055-E-P

1.00 (25) 2.38 (60) 2.88 (73) 1.69 (43) 188 (48)

1.34 ( 3 4)

.81 ( 21 ) .81 ( 21 ) .81 ( 21)

REPLACEMENT ELECTRODES FOR 4055-# AND 4055-#-P IGNITIERS

.09 (2.4) gap

.12 Ø (3)

L

4055 ELECTRODE L = inches (mm)

Designation

"L" Dimensions

Note: All 4-7865-2, thru -4 electrodes are made by shortening a R240-3203 igniter and re-bending the side-wire with custom tooling made by Fives North American. They are still labeled with the original R240-3203 or I-64-3 part number regardless of the length.

4-7865-1 4-7865-2 4-7865-3 4-7865-4

3.60" (91) 1.75" (44) 2.44" (62) 2.62" (67)

Bulletin 4055 Page 3

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