North American Hot Air Burners
Dimensions 6825
DIMENSIONS in inches
Burner for Typical Hard Wall Construction
¾ NPT for Obs. Port or UV conn.
¾ NPT for Pilot Tip
¾ pipe tap, 3 holes for Observation Port, Pilot Tip, and Flame Monitoring Device. See Note 1.
W°
45°
2 11⁄16
Y
vacuum formed refractory fiber lining
(8) N–dia. holes equally spaced
T°
T°
SectionY-Y
SectionX-X
Y pilot
Recommended Sensitrol™ Oil Valve
A–main air connection‡
Y
3⁄8 NPT oil inlet
Q
P
X U V
S sq.
D 1 dia.
G H
D 2 § sq.
P
2 9⁄16
Q
C–NPT atomizing air inlet
E–oil connection
ANSI 125 psi fl ange
B–NPT gas inlet
¼ NPT pressure tap
½ "
P
P
J
3⁄8 rad. typ.
F
K
Q
Q
L
R
M
7
Main air is drawn at 3 o’clock for convenience in showing flange dimensions, but arrangement designators are specified relative to main air at 12 o’clock. Thus the dimension drawing portrays a 3bf arrangement. (See Bulletin 6825 re arrangement designators.) NOTE: 1. Pilot must be located in center hole and at least 90 degrees from the main air inlet. Position selected should not place the pilot, observation port, and flame monitoring adapter boss in a bottom quadrant of the burner when installed. Burner dimensions in inches designation A ‡ B C D 1 D 1 § E F G H J K L M N 6825-2 4 1 ¾ 4 10 ¼ 5 2 1 3⁄8 8 5⁄16 14 11⁄16 17 5⁄8 24 5⁄16 ¾ 6825-3 4 1 ¾ 4 10 ¼ 5 2 1 3⁄8 8 5⁄16 14 11⁄16 17 5⁄8 24 5⁄16 ¾ 6825-4 4 1 ¼ ¾ 4 10 ¼ 5 2 1 3⁄8 8 5⁄16 14 11⁄16 17 5⁄8 24 5⁄16 ¾ 6825-5 4 1 ½ 1 5 10 3⁄8 5 2 1 3⁄8 8 5⁄16 14 11⁄16 17 5⁄8 24 5⁄16 ¾ 6825-6 4 1 ½ 1 5 10 3⁄8 5 2 1 3⁄8 8 5⁄16 14 11⁄16 17 5⁄8 24 5⁄16 ¾ 6825-7-A 6 2 ½ 2 7 12 3⁄8 7 2 5⁄8 1 ¾ 9 5⁄16 17 11⁄16 21 7⁄8 29 9⁄16 5⁄8 6825-7-B 6 2 ½ 2 7 12 3⁄8 7 2 5⁄8 1 ¾ 9 5⁄16 17 11⁄16 21 7⁄8 29 9⁄16 5⁄8 6825-8-A 6 2 ½ 2 7 12 3⁄8 7 2 5⁄8 1 ¾ 9 5⁄16 17 ¾ 21 7⁄8 29 9⁄16 5⁄8 Recommended Burner dimensions in inches and degrees Sensitrol Wt, designation P Q R S T° U V W° X Y Oil Valve lb 6825-2 3 1⁄8 6 ¼ 2 5⁄16 14 67 ½ 7 ½ 9 42 4 1 29⁄32 1813-03 175 6825-3 3 1⁄8 6 ¼ 2 5⁄16 14 67 ½ 7 ½ 9 42 4 1 29⁄32 1813-03 175 6825-4 3 1⁄8 6 ¼ 2 5⁄16 14 67 ½ 7 ½ 9 42 4 1 29⁄32 1813-03 175 6825-5 3 1⁄8 6 ¼ 2 5⁄16 14 67 ½ 7 ½ 9 42 4 1 29⁄32 1813-02-A 175 6825-6 3 1⁄8 6 ¼ 2 5⁄16 14 67 ½ 7 ½ 9 42 4 1 29⁄32 1813-02-A 175 6825-7-A 3 11⁄16 7 3⁄8 2 ¾ 16 58 ½ 9 ½ 11 34 ½ 6 1 13⁄16 1813-02-B 230 6825-7-B 3 11⁄16 7 3⁄8 2 ¾ 16 58 ½ 9 ½ 11 34 ½ 6 1 13⁄16 1813-02-B 230 6825-8-A 3 11⁄16 7 3⁄8 2 ¾ 16 58 ½ 9 ½ 11 34 ½ 6 1 13⁄16 1813-02-C 230 ‡ Except for -8-A, use supply piping with oversized flange. § Furnace opening should be ½ " larger than dimension D 2. Piping not furnished by North American. Dimension M assumes the use of a close nipple between burner and Sensitrol. Optional (recommended) Sensitrol Oil Valve is not included as part of the burner assembly, and must be ordered separately.
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