Bulletin 6758
Page 3
PILOTS AND FLAME SUPERVISION
Burners light reliably from a 4021-12 Pilot Tip fed by a 4031 Pilot Mixer. Air pressure to mixer must be about 16 osi, and mixture line should be cross-
connected to pilot regulator. An interrupted pilot is essential when fl ame supervision is used.
Pilot gas solenoid must be downstream of pilot gas regulator.
Ultraviolet or rod-type fl ame detectors can be used. Flame rods are not recommended for oil operation. See Bulletin 8832 for fl ame
detector adapters.
Flame rod lengths from outer surface of mounting boss to rod tip are 4
½
" for 6758-4 and 5" for 6758-6 Burner.
For gas only applications, 4758 Burners can be specifi ed. See also Bulletin 4762.
DIMENSIONS
inches
Burner
dimensions in inches
Sensitrol
designation
A
B
C
F
Wt, lb
Oil Valve
6758-4
2
1
¼
¾
5
¼
33
1813-02-A
6758-6
3
1
½
1 5
9⁄16
68
1813-02-B
Three
¾
" fpt holes for pilot, fl ame detector, and observa-
tion port (interchangeable, but pilot and fl ame detector must
be in adjacent openings). If pilot is not ordered, lighter hole
cover is furnished on center opening.
5 dia.
7
11⁄16
4-3594-1
Jacketed tile
and mounting
(6758-6 only)
9
½
½
15
5⁄16
17
7⁄8
¼
fpt
air pressure tap
3⁄8
fpt
Oil
1
3⁄8
2
B–fpt
Gas
C–fpt
Atomizing
air
nipple by
customer
A–fpt
Main air
10
13⁄16
7
7⁄8
3
7⁄8
These dimensions assume use of a
3⁄8
" close pipe nipple between burner and Sensitrol Oil Valve.
Cop
yr
igh
t © 2020 - F
iv
es - All r
igh
ts r
eser
ved. Bulle
tin 6758 04/94
Dimensions | Immersion Tube Burners
WARNING:
Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot
surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot
surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
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
.
Fives North American Combustion, Inc.
4455 East 71st Street - Cleveland, OH 44105 - USA
www.fi vesgroup.com
CONTACT
fna.sales@fi vesgroup.com
T +1 800 626 3477 - F +1 216 373 4237
