Use and Care Manual
2
INTREPID
Standard working pressure 30 psi water, 15 psi steam.
All boilers hydrostatically tested — A.S.M.E.
* For forced hot water heating systems where the boiler and all piping are located within
the area to be heated, the boiler may be selected on the basis of gross D.O.E. capacity
output. The net AHRI output ratings shown are based on an allowance for piping and
pickup of 1.15 (water) or 1.33 (steam). D.O.E. capacity gross output is divided by the
allowance to obtain net rating. The manufacturer should be consulted before selecting a
boiler for unusual piping and pickup requirements such as intermittent system operation,
extensive piping, etc.
† Ratings apply to the use of light oil at 140,000 Btu per gallon, and apply only when burner
models listed on pages 19-25 of this manual are used, and are properly adjusted to pro-
duce 13% CO
2
.
§ Nominal clay tile liner dimensions.
** Tankless heater rating based on intermittent draw.
‡ AHRI gross output (Btuh) and thermal efficiency.
❑ Collar is oblong, will fit 6" diameter nominal connector.
¢ This dimension is from the boiler jacket to the center of the flue outlet.
NOTE: All boilers under 300,000 Btuh input are tested and rated for capacity under the U.S.
Department of Energy (D.O.E.) test procedures for boilers.
RATINGS
Intrepid Boiler Net Ratings
Dimensions (inches)
Boiler
Sect.
Tankless
Heater
GPM **
Boiler
Model
No.*
AHRI
Burner
Capacity
(GPH)
†
Input
Rating
(MBH)
D.O.E.
Heating
Capacity MBH
AHRI
Net
Rating
Water
(MBH) *
AHRI
Net
Rating
Steam
(MBH) *
Steam
Sq. Ft.
AHRI Chimney Size
A.F.U.E. %
Boiler
Length
“A”
Front
to
Flue
¢
“B”
Flue
Dia.
“C”
Return
Circulator
Flange
“D”
Overall
Length
“E”
Water Steam
Rectangular (in.) Round (in.) Height (ft.)
Water
Stea
m
Water Steam
TR-20H
TR-30H
LD-30H
TR-40H
TR-50H
LD-50-2.15
TR-60-2.60
LD-60-2.60
TR-60-2.85
LD-70-3.00
TR-70-3.00
TR-70-3.35
0.65
1.00
1.00
1.50
2.00
2.15
2.60
2.60
2.85
3.00
3.10
3.35
91
140
140
210
280
301
364
364
399
420
420
435
78
120
120
181
241
250
301
301
326
355
358
381
–
119
119
178
238
248
311
311
–
349
326
–
68
104
104
157
210
217
262
262
283
309
311
331
–
89
89
134
179
186
233
233
–
262
272
–
–
372
372
558
744
777
971
971
–
1096
1108
–
8 x 8
8 x 8
8 x 8
8 x 8
8 x 8
8 x 8
8 x 12
8 x 12
8 x 12
8 x 12
8 x 12
8 x 12
5
6
6
7
8
8
10
10
10
10
10
10
15
15
15
15
15
15
15
15
15
15
15
15
86.0
86.0
86.0
86.0
86.0
86.0
82.7
‡
82.7
‡
82.7
‡
82.4
‡
82.4
‡
81.2
‡
85.0
85.0
85.0
85.0
85.0
85.0
85.5
‡
85.5
‡
–
83.2
‡
83.2
‡
–
11
1
⁄2
14
7
⁄8
14
7
⁄8
18
1
⁄4
21
5
⁄8
21
5
⁄8
25
25
25
28
3
⁄8
28
3
⁄8
28
3
⁄8
8
9
⁄
32
10
1
⁄
32
10
1
⁄
32
11
23
⁄
32
13
13
⁄
32
13
13
⁄
32
15
3
⁄
32
15
3
⁄
32
15
3
⁄
32
16
25
⁄
32
16
25
⁄
32
16
25
⁄
32
6
❑
6
6
7
8
8
8
8
8
9
9
9
1
1
⁄4
1
1
⁄4
1
1
⁄4
1
1
⁄4
1
1
⁄2
1
1
⁄2
1
1
⁄2
1
1
⁄2
1
1
⁄2
–
–
–
24
1
⁄
4
27
5
⁄
8
27
5
⁄
8
31
34
3
⁄
8
34
3
⁄
8
37
3
⁄
4
37
3
⁄
4
37
3
⁄
4
41
1
⁄
8
41
1
⁄
8
41
1
⁄
8
2
3
3
4
5
5
6
6
6
7
7
7
2.20
3.10
3.10
3.80
4.30
4.30
5.00
5.00
5.00
5.40
5.40
5.45
–
–
–
3.40
3.90
3.90
–
4.50
–
5.00
5.00
5.00