Product Overview | 4051 Igniters
The 4051 Igniter has the ability to increase the lighting windows typically associated with direct spark ignition on many burners. The stainless steel igniter body, which acts as the spark ground, can not be easily bent or distorted like conventional spark igniters. This construction helps provide repeatable lighting performance. Gas pilots, however, are still preferred for lighting fuels other than natural gas and lighting under high excess air conditions. Many North American nozzle mix gas burners can be ignited with 4051 igniters as an alternative to gas pilot or manual torch lighting. Consult your North American salesman to determine if it is applicable to your burner.
air source tap should be located upstream of the combustion air control valve.
Standard 6000 volt transformers and ignition cables are used with these igniters. Half wave transformers are not suitable. North American and other flame supervision systems can be designed for direct spark ignition, using a standard detector to monitor the main flame. Since sparks produce ultraviolet (UV) light which can be detected by UV flame supervision equipment, an ignition timer must be used to keep the spark igniter on 4-5 seconds to give the main flame time to light. Spark igniters must be shut off after lighting the main flame .
Air is supplied through either of two 1⁄8 " NPT taps provided on the igniter assembly (see table below for specific air flow rates). The
NOTE: Half-wave transformers are not recommended with this igniter.
1 / 8 " N.P.T. Air Connection* 3 /
Air Adapter
AIR FLOW RATES
4 " Male Pipe Thread
Electrode
Igniter Body
I gniter Body Air Pressure
Igniter
Air Flow 33 cfh 50 cfh 77 cfh 121 cfh 172 cfh
0.1 osi 0.2 osi 0.5 osi
1 osi
L
No More Than 4"
1 /
2
2 osi
* This unused tap must be plugged.
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC. IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL.
Igniter
-L-
Replacment Electrode 4-20825-1 4-20825-2 4-20825-3 4-20825-4 4-20825-5
Burner
Igniter
size
inch (mm)
designation
Size
designation
4 051-A 4051-B 4051-C
1"
(25) (60) (73) (43) (48)
4422 4423 4423 4424
-2 thru -8
4051-D 4051-D 4051-C 4051-D 4051-C 4051-D 4051-A 4051-D 4051-C 4051-B 4051-C 4051-B1
2 3⁄8 " 2 7⁄8 "
-0
-1 thru -3
4051-D 1 11⁄16 "
-0
4051-E
1 7⁄8 "
-1 thru -3 -2 thru -8 -0 thru -4 -5 thru -7 -2 thru -4 -5 thru -7 -2 thru -4 -5 thru -8
4425
REPLACEMENT ELECTRODE Replacement spark electrodes with the ceramic centering spider attached are available. The final length of the electrode is determined by cutting off the excess length after the electrode is assembled in the igniter body. Cut the electrode rod with a hack saw or heavy wire cutters leaving ½ " of the rod protruding from the igniter body.
4442
4832
4836
Bulletin 4051 Page 2
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