Figure 18: U-Tube, Opposite 45° Reflector; Figure 19: 2-Foot Deco Grille, 1-Foot Deco Grille And Protective Grille; Figure 20: Lower Clearance Shield - Roberts Gorden CTH2040NP Instructions Manual

VANTAGE ® II F C I
UEL ONVERSION NSTRUCTIONS
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 18: U-TUBE, OPPOSITE 45
A
B
C

FIGURE 19: 2-FOOT DECO GRILLE, 1-FOOT DECO GRILLE AND PROTECTIVE GRILLE

A
C
B D

FIGURE 20: LOWER CLEARANCE SHIELD*

A
B
D
C
*When installed in the first 10' (3 m).
16 of 21
°
REFLECTOR
Model
CTH2-40
CTH2-60
CTH2-80
D
CTH2-100
CTH2-125
CTH2-150
CTH2-175
Model
CTH2-40
CTH2-60
CTH2-80
CTH2-100
CTH2-125
CTH2-150
CTH2-175
Model
CTH2-40
CTH2-60
CTH2-80
CTH2-100
CTH2-125
CTH2-150
CTH2-175
(inches)
A B C
- UNAPPROVED -
8 54 60
8 60 66
10 64 74
10 70 78
12 74 84
12 76 85
(inches)
A B C
6 27 53
6 35 63
6 38 66
6 40 71
6 46 77
6 50 80
8 52 82
(inches)
A B C
6 34 27
6 39 33
6 40 38
6 50 44
6 54 48
6 55 50
- UNAPPROVED -
(centimeters)
D A B
- UNAPPROVED -
22 21 138 153
22 21 153 168
22 26 163 188
22 26 178 199
22 31 188 214
22 31 194 216
(centimeters)
D A B
27 16 69 135
35 16 89 161
38 16 97 168
40 16 102 181
46 16 117 196
50 16 127 204
52 21 133 209
(centimeters)
D A B
34 16 87
39 16 100
40 16 102
50 16 127 112
54 16 138 122
55 16 140 127
- UNAPPROVED -
C D
56
56
56
56
56
56
C D
69
89
97
102
117
127
133
C D
69 87
84 100
97 102
127
138
140