Roberts Gorden CTH2-125 User Manual
Page 13
SECTION 3: C
LEARANCES
TO
C
OMBUSTIBLES
7
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 7: 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 8: U-TUBE, 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
FIGURE 9: U-TUBE, OPPOSITE 45
°
REFLECTOR
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTH2-40
- UNAPPROVED -
- UNAPPROVED -
CTH2-60
8
54
60
22
21
138
153
56
CTH2-80
8
60
66
22
21
153
168
56
CTH2-100
10
64
74
22
26
163
188
56
CTH2-125
10
70
78
22
26
178
199
56
CTH2-150
12
74
84
22
31
188
214
56
CTH2-175
12
76
85
22
31
194
216
56
A
C
D
B