Modu-Fire® Gas-Fired Boiler
By Installer
Remote Gas
Shutoff (not
supplied)
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Drip Leg |
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Shutoff (on |
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boiler) |
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Gas Meter (not |
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supplied) | Gas Piping | |
Installation
on the boiler. Gas piping should be installed in accor- dance with National Fuel Gas Code, ANSI Z223.1, latest edition, and any other local codes which may apply; in Canada see
Note: See chart below for required pipe size, based on overall length of pipe from meter plus equivalent length of all fittings. Approximate sizing may be based on 1 cubic foot of natural gas per 1,000 Btu per hour input, i.e., 900,000 Btu per hour requires about 900 cubic feet per hour. (See Typical Boiler Operating Conditions, Section 4.3, for more information.)
WARNING!
All threaded connections must be made using a pipe compound that is resistant to the action of liquefied petroleum gases. Do not use Teflon tape on gas line threads.
Note: Install a sediment trap (drip leg) and a union connection ahead of the primary manual shutoff valve
Pipe Capacity for Natural Gas
Nominal |
| Equivalent Pipe Length | Maximum Capacity in Cubic Feet of Natural Gas per Hour | |||||||||
Iron | Internal |
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| Pressure Drop of 0.5 inch Water Column/Equivalent Length of | ||||||||
Pipe | Diameter |
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Size | (Inches) | 90º Ell | Tee |
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(Inches) |
| (Feet) | (Feet) | 20 | 40 | 60 |
| 80 |
| 100 | 150 | 200 |
1.380 | 3.45 | 6.9 | 950 |
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1.610 | 4.02 | 8.04 | 1,460 | 990 | 810 |
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2 | 2.067 | 5.17 | 10.3 | 2,750 | 1,900 | 1,520 |
| 1,300 |
| 1,150 | 950 | 800 |
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2.469 | 6.16 | 12.3 | 4,350 | 3,000 | 2,400 |
| 2,050 |
| 1,850 | 1,500 | 1,280 | |
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3 | 3.068 | 7.67 | 15.3 | 7,700 | 5,300 | 4,300 |
| 3,700 |
| 3,250 | 2,650 | 2,280 |
4 | 4.026 | 10.1 | 20.2 | 15,800 | 10,900 | 8,800 |
| 7,500 |
| 6,700 | 5,500 | 4,600 |
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