Figure 15: U-Tube, Opposite 45° Tilt; Figure 16: U-Tube, Protective Grille; Figure 17: U-Tube, Venting - Roberts Gorden Blackheat BH15UT Installation, Operation & Service Manual

NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, tees, elbows and crosses.
FIGURE 15: U-TUBE, OPPOSITE 45° TILT
A
D
B
C

FIGURE 16: U-TUBE, PROTECTIVE GRILLE

A
D
B
C

FIGURE 17: U-TUBE, VENTING

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 U-tube.
A 200 200
B 1370 1530
C 1500 1650
D 560 560
A 150 150
B 890 970
C 1580 1730
D 760 940
E 1000 1000
F 500 500
SECTION 3: C
200 250 250
1530 1630 1780
1650 1860 1960
560 560 560
150 150 150
970 1020 1170
1730 1910 1980
940 1000 1090
1000 1000 1000
500 500 500
C
LEARANCES TO OMBUSTIBLES
275 300 300
1830 1880 1930
2040 2110 2160
560 560 560
150 200 200
1220 1270 1380
2050 2110 2210
1150 1200 1300
1000 1000 1000
500 500 500
9 of 75