Roberts Gorden NDUSTRIA NHE Series Installation, Operation & Service Manual page 10

NHE-S I , O
ERIES NSTALLATION PERATION AND
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 6: U-TUBE, LEVEL REFLECTOR
A
B
C
FIGURE 7: U-TUBE, 45
A
B
C
FIGURE 8: U-TUBE, OPPOSITE 45
A
B
C
6
S M
ERVICE ANUAL
Model
NHE-40
NHE-60
NHE-80
D
NHE-100
NHE-125
NHE-150
NHE-175
°
Model
NHE-40
NHE-60
D
NHE-80
NHE-100
NHE-125
NHE-150
NHE-175
°
REFLECTOR
Model
NHE-40
NHE-60
NHE-80
NHE-100
D
NHE-125
NHE-150
NHE-175
(inches)
A B C
- UNAPPROVED -
6 35 63
6 38 69
6 40 76
6 46 79
6 50 84
8 54 87
(inches)
A B C
- UNAPPROVED -
8 8 60
8 8 66
8 8 74
8 8 78
8 8 84
8 8 85
(inches)
A B C
- UNAPPROVED -
8 54 60
8 60 66
10 64 74
10 70 78
12 74 84
12 76 85
(centimeters)
D A B
- UNAPPROVED -
30 16 89 161
37 16 97 176
39 16 102 194
43 16 117 201
47 16 127 214
51 21 138 221
(centimeters)
D A B
- UNAPPROVED -
42 21 21 153
46 21 21 168
52 21 21 188
61 21 21 199
66 21 21 214
70 21 21 216
(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
C D
77
94
100
110
120
130
C D
107
117
133
155
168
178
C D
56
56
56
56
56
56