SECTION 3: CLEARANCES TO COMBUSTIBLES
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, tees, elbows and crosses.
2.Clearances B, C and D can be reduced by 50% after 7500 mm of tubing downstream from the burner.
3.All measurements are in millimeters.
4.Add 60 mm clearance to uncovered
FIGURE 14: U-TUBE, OPPOSITE 45° TILT
B |
A |
C
D
Model
A
B
C
D
HE15U
200
1370
1500
560
HE20UT
200
1530
1650
560
HE25UT
200
1530
1650
560
HE30UT
250
1630
1860
560
HE35UT
250
1780
1960
560
HE40UT
275
1830
2040
560
HE45UT
300
1880
2110
560
HE50UT
300
1930
2160
560
FIGURE 15: U-TUBE, PROTECTIVE GRILLE
| A |
| Model | HE15UT | HE20UT |
|
|
|
|
| |
B |
| D | A | 150 | 150 |
C |
|
|
| ||
|
| B | 890 | 970 | |
|
|
| |||
|
|
| C | 1580 | 1730 |
|
|
| D | 760 | 940 |
HE25UT
150
970
1730
940
HE30UT
150
1020
1910
1000
HE35UT
150
1170
1980
1090
HE40UT
150
1220
2050
1150
HE45UT
200
1270
2110
1200
HE50UT
200
1380
2210
1300
FIGURE 16: U-TUBE, VENTING
| E |
Radiant tubes | Fan |
F |
Model
E
F
HE15UT
1000
500
HE20UT
1000
500
HE25UT
1000
500
HE30UT
1000
500
HE35UT
1000
500
HE40UT
1000
500
HE45UT
1000
500
HE50UT
1000
500
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