Page 18 | GS110 DIRECT VENT BOILER INSTALLATION AND OPERATION INSTRUCTIONS |
GAS SUPPLY PIPING
The GS110 hot water boiler comes from the factory ready to be piped to the gas supply. The gas supply can be piped from the left or right side of the boiler.
GS110 |
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Section | Connection |
Size | Tapping |
3 | 1/2" |
4 | 1/2" |
5 | 1/2" |
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6 | 3/4" |
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7 | 3/4" |
If for any reason the boiler is not for the type of gas available at the installation site, call the nearest Smith Cast Iron Boiler distributor to resolve the problem.
Figure 18 depicts the proper way to connect the boiler to the gas supply piping. The manual
Figure 18 - Gas Supply Piping
CAUTION: Always use a wrench on the gas valve body when making gas connections to it. Never
Table 8 should be used to ensure that the gas supply piping is sized properly. If more than one appliance is supplied by the same supply pipe, the piping must be sized based on the maximum possible demand. Do not neglect the pressure drop due to pipe fittings. Table 9 should be used in conjunction with Table 8 to ensure that the gas supply piping is sized properly.
Safe lighting and other performance criteria were met | |||||||||
with the gas manifold and control assembly provided on | |||||||||
the boiler when the boiler underwent tests specified in | |||||||||
ANSI Z21.13. All gas connections MUST be leak tested | |||||||||
before putting the boiler into operation. |
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Table 8 - Gas Pipe Capacity |
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Nominal |
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| Pipe length in feet |
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Iron Pipe | 10 | 20 | 30 | 40 | 50 | 60 | 80 | 100 | 150 |
Size, (in) |
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| Gas pipe Capacity (ft3/hr) |
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3/4″ | 278 | 190 | 152 | 130 | 115 | 105 | 90 | 79 | 64 |
1″ | 520 | 350 | 285 | 245 | 215 | 195 | 170 | 150 | 120 |
11/4″ | 1050 | 730 | 590 | 500 | 440 | 400 | 350 | 305 | 250 |
11/2″ | 1600 | 1100 | 890 | 760 | 670 | 610 | 530 | 460 | 380 |
Note: Maximum pipe capacity in ft3/hr is based on a 0.60 specific gravity gas at a pressure of 0.5 psig and a 0.3" WC pressure drop.
Table 9 - Equivalent Pipe Length Chart |
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Nominal |
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90° Elbow | Tee | Gas Valve |
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Iron Pipe |
| Gas Cock | |||||
(branch flow) | (full port) |
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Size, (in) |
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| Equivalent length of pipe fitting in feet | ||||||
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3/4″ | 2.6 |
| 5.2 | 0.6 |
| 1.5 | |
1″ |
| 3.5 |
| 6.9 | 0.8 |
| 1.9 |
1 | ″ | 4.0 |
| 8.0 | 0.9 |
| 2.3 |
1 /4 |
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1 | ″ | 5.2 |
| 10.3 | 1.2 |
| 3.0 |
1 /2 |
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Whenever the gas supply piping is pressure tested the | |||||||
boiler gas controls must be protected. If the test pres- | |||||||
sure is equal to, or less than 1/2 psig (3.5 kPa) isolate | |||||||
the boiler by closing it's manual shut off valve, see | |||||||
Figure 18. If the test pressure is greater than 1/2 psig | |||||||
(3.5 kPa), disconnect the boiler and it's individual shut- | |||||||
off valve from the gas supply piping. |
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WARNING: Never use an open flame to test for | |||||||
gas leaks. Always use an approved leak | |||||||
detection method. Failure to comply with this | |||||||
WARNING could result in an explosion! |
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ELECTRICAL WIRING |
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CAUTION: Label all wires prior to disconnection | |||||||
when servicing controls. Wiring errors can cause | |||||||
improper and dangerous operation! |
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ATTENTION: Au moment de l'entretien des | |||||||
commandes, étiquetez tous les fils avant de les | |||||||
débrancher. Des erreurs de câblage peuvent | |||||||
entraîner un fonctionnement inadéquat et | |||||||
dangereux. S'assurer que l'appareil fonctionne | |||||||
adéquatement une fois l'entretirn terminé. |
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The electrical connections to this boiler/water heater | |||||||
must be made in accordance with all applicable local | |||||||
codes and the latest revision of the National Electrical | |||||||
Code, | |||||||
with CSA C22.1 Canadian Electrical Code Part I if |