TF-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) on each side of the burner.
**Roberts-Gordon prohibits the installation of this heater for all unapproved applications.
FIGURE 9: U-TUBE, OPPOSITE 45
°
REFLECTOR
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
TF-120
8
54
60
22
21
138
153
56
TF-160
8
60
66
22
21
153
168
56
TF-200
10
64
74
22
26
163
188
56
TF-250
10
70
78
22
26
178
199
56
TF-300
12
74
84
22
31
188
214
56
TF-350
12
76
85
22
31
194
216
56
TF-380
12
76
85
22
31
194
216
56
A
C
D
B
FIGURE 10: 2-FOOT DECO GRILLE AND PROTECTIVE GRILLE
(inches)
(centimeters)
Model
A
B
C
D
A
B
C
D
TF-120
6
35
63
35
16
89
161
89
TF-160
6
38
66
38
16
97
168
97
TF-200
6
40
71
40
16
102
181
102
TF-250
6
46
77
46
16
117
196
117
TF-300
6
50
80
50
16
127
204
127
TF-350
8
52
82
52
21
133
209
133
TF-380
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
TF-120
6
39
33
39
16
100
84
100
TF-160
6
40
38
40
16
102
97
102
TF-200
6
50
44
50
16
127
112
127
TF-250
6
54
48
54
16
138
122
138
TF-300
6
55
50
55
16
140
127
140
TF-350**
Unapproved
Unapproved
TF-380**
Unapproved
Unapproved
A
C
D
B
