Roberts Gorden CTH2-125 User Manual
Page 14
CTH2-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
8
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.
*When installed in the first 10' (3 m).
FIGURE 10: 2-FOOT DECO GRILLE AND PROTECTIVE GRILLE
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTH2-40
6
27
53
27
16
69
135
69
CTH2-60
6
35
63
35
16
89
161
89
CTH2-80
6
38
66
38
16
97
168
97
CTH2-100
6
40
71
40
16
102
181
102
CTH2-125
6
46
77
46
16
117
196
117
CTH2-150
6
50
80
50
16
127
204
127
CTH2-175
8
52
82
52
21
133
209
133
A
C
D
B
FIGURE 11: LOWER CLEARANCE SHIELD*
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
CTH2-40
6
34
27
34
16
87
69
87
CTH2-60
6
39
33
39
16
100
84
100
CTH2-80
6
40
38
40
16
102
97
102
CTH2-100
6
50
44
50
16
127
112
127
CTH2-125
6
54
48
54
16
138
122
138
CTH2-150
6
55
50
55
16
140
127
140
CTH2-175
- UNAPPROVED -
- UNAPPROVED -
A
C
D
B
FIGURE 12: VENTING
(inches)
(centimeters)
Model
A
E
F
A
E
F
CTH2-40
14
18
18
36
46
46
CTH2-60
14
18
18
36
46
46
CTH2-80
20
24
18
51
61
46
CTH2-100
20
24
18
51
61
46
CTH2-125
20
24
18
51
61
46
CTH2-150
20
30
18
51
77
46
CTH2-175
20
30
18
51
77
46
Radiant Tubes
Vent
Pipes
Unvented
Vented
A
E
F