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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