SECTION 6: C
LEARANCES
TO
C
OMBUSTIBLES
15 of 21
NOTE:
1. All dimensions are from the s
u
rfaces of all t
u
bes, co
u
plings and elbo
w
s.
2. Clearances B, C and D can be red
u
ced by 50% after 25' (7.5 m) of t
u
bing do
w
nstream
from
w
here the b
u
rner and b
u
rner t
u
be connect.
FIGURE 15: 45
°
TILT REFLECTOR
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTH2-40
8
8
51
46
21
21
130
117
CTH2-60
8
8
60
54
21
21
153
138
CTH2-80
8
8
66
60
21
21
168
153
CTH2-100
10
8
74
64
26
21
188
163
CTH2-125
10
8
78
69
26
21
199
176
CTH2-150
12
8
84
74
31
21
214
188
CTH2-175
12
8
85
79
31
21
216
201
FIGURE 16: U-TUBE, STANDARD REFLECTOR
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTH2-40
- UNAPPROVED -
- UNAPPROVED -
CTH2-60
6
35
63
30
16
89
161
77
CTH2-80
6
38
69
37
16
97
176
94
CTH2-100
6
40
76
39
16
102
194
100
CTH2-125
6
46
79
43
16
117
201
110
CTH2-150
6
50
84
47
16
127
214
120
CTH2-175
8
54
87
51
21
138
221
130
A
C
D
B
FIGURE 17: U-TUBE, FULL 45
°
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTH2-40
- UNAPPROVED -
- UNAPPROVED -
CTH2-60
8
8
60
42
21
21
153
107
CTH2-80
8
8
66
46
21
21
168
117
CTH2-100
8
8
74
52
21
21
188
133
CTH2-125
8
8
78
61
21
21
199
155
CTH2-150
8
8
84
66
21
21
214
168
CTH2-175
8
8
85
70
21
21
216
178
B
C
D
A
