BLACKHEAT® INSTALLATION OPERATION AND SERVICE MANUAL
3.3 Clearance Data -U Tube
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 11: U-TUBE, HORIZONTAL MOUNT
A |
B 
D
C
Model
A
B
C
D
BH15UT
150
890
1580
760
BH20UT
150
970
1730
940
BH25UT/EF
150
970
1730
940
BH30UT/EF
150
1020
1910
1000
BH35UT/EF
150
1170
1980
1090
BH40UT/EF
150
1220
2050
1150
BH45UT/EF
200
1270
2110
1200
BH50UT/EF
200
1380
2210
1300
FIGURE 12: U-TUBE, ONE SIDE REFLECTOR
A |
B 
D
C
Model A B C D
BH15UT
150
230
1580
1200
BH20UT
150
230
1760
1380
BH25UT/EF
150
230
1760
1380
BH30UT/EF
150
230
1930
1500
BH35UT/EF
150
230
2090
1660
BH40UT/EF
150
230
2130
1710
BH45UT/EF
200
230
2160
1760
BH50UT/EF
200
230
2240
1860
FIGURE 13: U-TUBE, TWO SIDE REFLECTORS
A |
B 
D
C
Model A B C D
BH15UT
150
590
1660
590
BH20UT
150
640
1810
640
BH25UT/EF
150
640
1810
640
BH30UT/EF
150
690
1960
690
BH35UT/EF
150
820
2110
820
BH40UT/EF
150
860
2160
860
BH45UT/EF
200
890
2210
890
BH50UT/EF
200
1020
2320
1020
FIGURE 14: U-TUBE, FULL 45° MOUNT
A
B
D 
C
Model A B C D
BH15UT
200
200
1500
1070
BH20UT
200
200
1650
1170
BH25UT/EF
200
200
1650
1170
BH30UT/EF
200
200
1860
1320
BH35UT/EF
200
200
1960
1550
BH40UT/EF
200
200
2040
1620
BH45UT/EF
200
200
2110
1680
BH50UT/EF
200
200
2160
1780
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