Roberts Gorden NDUSTRIA NHE Series Installation, Operation & Service Manual page 9

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 3: LEVEL SIDE REFLECTOR
A
B
D
C
FIGURE 4: TWO SIDE REFLECTORS
A
B
D
C
°
FIGURE 5: 45 TILT REFLECTOR
(inches)
Model A B
NHE-40 6 9
NHE-60 6 9
NHE-80 6 9
NHE-100 6 9
NHE-125 6 9
NHE-150 6 9
NHE-175 8 9
(inches)
Model A B
NHE-40 6 15
NHE-60 6 23
NHE-80 6 25
NHE-100 6 27
NHE-125 6 32
NHE-150 6 35
NHE-175 8 40
(inches)
Model A B
NHE-40 8 8
NHE-60 8 8
NHE-80 8 8
NHE-100 10 8
NHE-125 10 8
NHE-150 12 8
NHE-175 12 8
SECTION 3: C
(centimeters)
C D A
53 44 16
63 47 16
70 54 16
77 59 16
83 65 16
86 69 16
88 73 21
(centimeters)
C D A
53 15 16
66 23 16
72 25 16
78 27 16
84 32 16
88 35 16
91 40 21 102
(centimeters)
C D A
51 46 21
60 54 21
66 60 21
74 64 26
78 69 26
84 74 31
85 79 31
C
LEARANCES TO OMBUSTIBLES
B C D
23 135 112
23 161 120
23 178 138
23 196 150
23 211 166
23 219 176
23 224 186
B C D
39 135 39
59 168 59
64 183 64
69 199 69
82 214 82
89 224 89
232 102
B C D
21 130 117
21 153 138
21 168 153
21 188 163
21 199 176
21 214 188
21 216 201
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