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Bosch AQ 125BO LP Use And Care Manual page 11

Outdoor water heater
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Installation
instructions
FOR NATURAL
GAS
Maximum Capacity
of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop
of 0.3 in Water Column
(0.75mbar).(Based
on a 0.60 Specific
Gravity Gas) Btu numbers
given in thousands.
Copper tubing is prohibited
for use with Natural Gas in the Commonwealth
of Massachusetts
and not recommended
elsewhere.
Follow boxed numbers for piping just one AQ125 BO (example: 3/4" B.I. Natural Gas pipe for 20 ft (6.1m). will I
handle
190,000
btu's
(55.7
kWh).
For multiple
appliances
combine
the total
btu input
load and
then refer
to
applicable chart below.
Nominal
Iron
Length
of Black
Iron Pipe, Feet
Pipe
Internal
Size
Diameter
inches
inches
t 0
20
30
40
50
60
70
80
90
t 00
125
t 50
175
200
1/4
0,364
32
22
18
t5
14
12
tt
11
10
9
8
8
7
6
3/8
0.493
72
49
40
34
30
27
25
23
22
2t
t8
17
t5
t4
0.622
1t32
I
92
73
63
I
56
50
46
43
40
38
34
31
28
26
1
0.824278
I
t90
t52
130
tt5
t05
96
90
84
79
72
64
59
55
1.049
520
350
285
245
2t5
t95
180
t70
160
t50
130
t201110100110
100
1.380
1050
730
590
500
440
400
370
350
320
305
275
25012252101
t t/2
1.6t0
1600
t100
890
760
670
6t0
560
530
490
460
410
380
350
320
2
2.067
3050
2t00
1650
1450
1270
t150
t050
990
930
870
780
7t0
650
610
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube
size,
inches
EHD*
10
20
30
40
50
60
1/2
18 EHD
82
58
47
41
37
34
23
H[_116
96
83
75
68
30 EHD
3301231
188
162
144
131
11/4
37 EHD
639456
374
325
292
267
* EHD
= Equivalent
Hydraulic
Diameter.
The greater
the
value of EH D, the greater
the gas capacity
of the tubing.
FOR LP GAS
Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet
Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column).
* EHD = Equivalent
Hydraulic
Diameter.
The greater
the
value of EH D, the greater
the gas capacity
of the tubing.
Nominal
Iron pipe
Black
Iron Pipe
size
Length
of pipe, Feet
inches
10
20
30
40
50
60
70
80
90
100
125
150
t,2,2. ,sg t52 ,2g tt4 to3 g65g5375 6g 53
113/4
Ir 567
693
315
2671
237
217
196
185
173
162
146
132
I
1
107
732
590
504
448
409
378
346
322
307
275
252
1 1/4
220
149
121
103
913
834
771
724
677
630
567
511
1 1/2
330
229
185
155
141
127
118
108
102
975
866
787
2
522
433
346
299
264
239
220
204
192
1811
1606
1496
Length of FlexbleCorrugatedSta nlessSteel Tubng (CSST), Feet
Tube
size
inches
EHD*
10
20
30
40
50
60
_18
EH_
91
74
64
58
5_
23 EHD
2541183
151
131
118
107
30 EHD
521
365
297
256
227
1 1/4
37 EHD
971
661
528
449
397
359
Maximum
Capacity
of
Semi-Rigid
copper
Tubing
in
Thousands
of
BTU
per
Hour
of
Undiluted
Liquefied
Petroleum
Gases
(at
11
inches
Water
Column
Inlet
Pressure).
(Based
on a Pressure
Drop of 0.5 Inch Water Column)
* Source
National Fuel Gas Code NFPA 54, ANSI Z223.1
- No Additional
Allowance
is necessary
for an ordinary
number of fittings
3utside
diameter
nch
Copper(LPgas
only)
Length
ofTubing,
Feet
10
20
30
40
50
60
70
80
90
100
3/8
39
26
21
19
1/2
92
62
50
41
37
35
31
29
27
26
5/8
_107
90
79
72
67
62
59
55
3/4
329
2161181
145
131
1211
112
104
95
90
I
I
Fig. 8
8 71 6 473 147
1 1

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