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SECTION 3: CLEARANCES TO COMBUSTIBLES
7 of 59
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream
from where the burner and burner tube connect.
FIGURE 6: 45° Tilt Reflector
(inches) (centimeters)
Model ABCDABCD
BH-40 8 8 50 46 21 21 127 117
BH-60 8 8 59542121150138
BH-80 8 8 65 60 21 21 166 153
BH-100 10 8 73 64 26 21 186 163
BH-115/125 10 8 77 69 26 21 196 176
BH-140/150 12 8 83 74 31 21 211 188
BH-175/200 12 8 85 79 31 21 216 201
FIGURE 7: U-Tube, Standard Reflector
(inches) (centimeters)
Model ABCDABCD
BH-40
- UNAPPROVED - - UNAPPROVED -
BH-60 6 35 62 30 16 89 158 77
BH-80 6 38 68 37 16 97 173 94
BH-100 6 40 75 39 16 102 191 100
BH-115/125 6 46 78 43 16 117 199 110
BH-140/150 6 50 83 47 16 127 211 120
BH-175/200 8 54 87 51 21 138 221 130
B
D
C
A
FIGURE 8: U-Tube, 45°
(inches) (centimeters)
Model ABCDABCD
BH-40
- UNAPPROVED - - UNAPPROVED -
BH-60 8 8 59422121150107
BH-80 8 8 65 46 21 21 166 117
BH-100 8 8 73 52 21 21 186 133
BH-115/125 8 8 77 61 21 21 196 155
BH-140/150 8 8 83 66 21 21 211 168
BH-175/200 8 8 85 70 21 21 216 178
C
D
B
A