Figure 17: U-Tube, Opposite 45° Reflector; Figure 18: 2-Foot Deco Grille, 1-Foot Deco Grille And Protective Grille; Figure 19: Lower Clearance Shield - Roberts Gorden Vantage NP CTHN040NP Instructions Manual

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 17: U-TUBE, OPPOSITE 45
A
B
C

FIGURE 18: 2-FOOT DECO GRILLE, 1-FOOT DECO GRILLE AND PROTECTIVE GRILLE

A
C
B D

FIGURE 19: LOWER CLEARANCE SHIELD*

A
B
D
C
*When installed in the first 10' (3 m).
°
REFLECTOR
Model
CTHN-40
CTHN-60
CTHN-80
CTHN-100
D
CTHN-125
CTHN-150
CTHN-175
CTHN-200
Model
CTHN-40
CTHN-60
CTHN-80
CTHN-100
CTHN-125
CTHN-150
CTHN-175
CTHN-200
Model
CTHN-40
CTHN-60
CTHN-80
CTHN-100
CTHN-125
CTHN-150
CTHN-175
CTHN-200
(inches)
A B C
- UNAPPROVED -
8 45 45
9 55 54
10 56 57
10 58 63
10 61 66
10 68 69
10 71 73
(inches)
A B C
5 20 41
5 27 51
5 30 58
5 32 60
5 35 65
5 39 71
8 44 74
8 47 76
(inches)
A B C
5 25 22
5 30 27
5 37 37
5 39 39
5 41 41
5 43 50
- UNAPPROVED -
- UNAPPROVED -
SECTION 6: C
RITICAL
(centimeters)
D A B
- UNAPPROVED -
10 20 114 114
10 23 140 137
10 25 142 145
10 25 147 160
20 25 155 168
20 25 173 175
20 25 180 185
(centimeters)
D A B
20 13 51 104
27 13 69 130
30 13 76 147
32 13 81 152
35 13 89 165
39 13 99 180
44 20 112 188
47 20 119 193
(centimeters)
D A B
25 13 64
30 13 76
37 13 94
39 13 99
41 13 104 104
43 13 109 127
- UNAPPROVED -
- UNAPPROVED -
C
ONSIDERATIONS
C D
25
25
25
25
51
51
51
C D
51
69
76
81
89
99
112
119
C D
56 64
69 76
94 94
99 99
104
109
15