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Water Connections - Bosch 940 ESO Manual

940 eso - natural gas / 940 eso - liquefied petroleum (lp) gas
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8.1.2
Gas Line Sizing Tables for LP GAS
For your convenience see below for an excerpt from gas line sizing tables for a single LP appliance. Their intended use of is for pipe sizing between the
the 2nd stage (low pressure) regulator and the appliance. For details see the current NFPA 54 or NFPA 58.
Specified pipe lengths are for one 940 ESO which has a maximum input of 199,000. The gas supply system must be sized for the combined total
maximum BTU/hr load requirements of all gas appliances running simultaneously.
The tables below show the maximum capacity of the gas supply pipe in thousands of BTU per hour of Undiluted LP Gas at 11" W.C (0.4 psig or 27.4
mbar) based on a pressure drop of 0.5" W.C (1.25 mbar).
Internal
Nominal Iron
Diameter
Pipe inches
inches
1/2
0.622
3/4
0.824
1
1.049
Table 8
Tube size,
inches
EHD*
3/4
23
3/4
23
1
30
1
31
Table 9
* EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the
greater the gas capacity of the tubing.
Nominal Iron
Internal Diameter
Pipe inches
inches
5/8
0.527
3/4
0.652
Table 10
Maximum Capacity of Semi-Rigid (flexible, non corrugated) Tubing in
Thousands of BTU/hr 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.
940 ESO
10
20
291
200
608
418
1150
787
Length of Corrugated Stainless Steel Tubing (CSST), Feet
10
20
30
254
183
151
303
216
177
521
365
297
605
425
344
10
188
329
Length of Black iron Pipe, Feet
30
40
50
160
137
122
336
287
255
632
541
480
40
50
60
131
118
107
153
137
126
256
227
207
297
265
241
Length of Semirigid (soft) Copper ACR Tubing, Feet
20
30
129
104
226
182
8.2

Water connections

NOTICE:
▶ This heater is not approved for preheated water
applications exceeding 140°F (60°C).
NOTICE:
▶ In applications where inlet water temperature can
exceed 140°F (60ºC), a 3-way valve or mixing valve
must be installed before the appliance to prevent
water exceeding 140°F (60°C) from entering the
appliance.
▶ When facing the heater, the ¾ " cold connection is on the bottom
right and the hot connection is on the bottom left. Centrally locating
the water heater is recommended to keep hot water distribution
times even throughout the structure.
Installation instructions | 19
60
80
110
101
231
212
434
400
70
80
90
99
94
90
117
109
102
191
178
169
222
208
197
40
89
155
6 720 644 956 (2016/05)
100
94
197
372
100
85
98
159
186
50
79
138

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