Bosch 330-PN-L, Руководство по установке

Страница: 17 / 36

6 720 644 951 (2014/11) 330 PN
Installation instructions | 17
GAS LINE SIZING
The gas supply piping should be sized according to the
applicable code for a maximum draw of 74,900 BTUH.
Measure the length of gas supply line and use the tables in
page 17 or the gas line manufacturer’s sizing tables to
determine the pipe diameter necessary to accommodate the
BTU demand of the unit. If there are more gas appliances drawing on the same line, size the gas line according to the total
maximum amount of BTU draw for all appliances.
Note: Under sizing the gas line may result in diminished output
and improper operation. See chapter 4.8 for the procedure to
confirm gas pressure.
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 330 PN (example: ¾”
B.I. Natural Gas pipe for 20 ft (6.1m). will handle 190,000
btu’s (55.7 kWh). For multiple appliances combine the total
btu input load and then refer to applicable chart below.
* EHD = Equivalent Hydraulic Diameter. The greater the value
EHD, the greater the gas capacity of the tubing.
FOR LP GAS
Maximum Capatity 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).
Lenght of Black Iron Pipe, Feet
Nominal
Iron
Pipe
Size
Inches
Internal
Diameter
inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200
3/4 0.824 278 190 152 130 115 105 96 90 84 79 72 64 59 55
1 1.049 520 350 285 245 215 195 180 170 160 150 130 120 110 100
1 - 1/4 1.380 1050 730 590 500 440 400 370 350 320 305 275 250 225 210
Table 7
Tube
size,
Inches
EHD*
Lenght of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
10 20 30 40 50 60
1/2 18 82 58 47 41 37 34
3/4 23 161 116 96 83 75 68
1 30 330 231 188 162 144 131
1 - 1/4 37 639 456 374 325 292 267
Table 8