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 9: U-Tube, Opposite 45° Reflector
B
A
C D
Model
(inches)
A B C D
- UNAPPROVED -
8 | 54 | 59 | 22 |
8 | 60 | 65 | 22 |
10 | 64 | 73 | 22 |
10 | 70 | 77 | 22 |
12 | 74 | 83 | 22 |
12 | 76 | 85 | 22 |
(centimeters)
A B C D
- UNAPPROVED -
21 | 138 | 150 | 56 |
21 | 153 | 166 | 56 |
26 | 163 | 186 | 56 |
26 | 178 | 196 | 56 |
31 | 188 | 211 | 56 |
31 | 194 | 216 | 56 |
FIGURE 10: |
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| Model | A | B | C | D | A | B | C | D |
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| A | 6 | 27 | 52 | 27 | 16 | 69 | 133 | 69 | |
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| 6 | 35 | 62 | 35 | 16 | 89 | 158 | 89 | |
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| C | 6 | 38 | 65 | 38 | 16 | 97 | 166 | 97 | |
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| 6 | 40 | 70 | 40 | 16 | 102 | 178 | 102 | ||
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B | D |
| 6 | 46 | 76 | 46 | 16 | 117 | 194 | 117 | |
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| 6 | 50 | 79 | 50 | 16 | 127 | 201 | 127 | |
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| 8 | 52 | 82 | 52 | 21 | 133 | 209 | 133 |
FIGURE 11: Lower Clearance Shield*
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| Model | A | B | C | D | A | B | C | D |
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| A | 6 | 34 | 27 | 34 | 16 | 87 | 69 | 87 | ||
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| 6 | 39 | 33 | 39 | 16 | 100 | 84 | 100 | |
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| 6 | 40 | 38 | 40 | 16 | 102 | 97 | 102 | |
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| 6 | 50 | 44 | 50 | 16 | 127 | 112 | 127 | ||||||
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| 6 | 54 | 48 | 54 | 16 | 138 | 122 | 138 | |
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| 6 | 55 | 50 | 55 | 16 | 140 | 127 | 140 | |
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*When installed in the first 10' (3 m).
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