Gas Piping - Lochinvar SOLUTION 260000 Installation & Service Manual

3
Gas connections
Nominal
Iron Pipe
Size
Inches
10 20
3/4 369 256
1 697 477
1 1/4 1,400 974
1 1/2 2,150 1,500
2 4,100 2,820
2 1/2 6,460 4,460
3 11,200 7,900
4 23,500 16,100 13,100 11,100 10,000 9,000 8,300 7,690 7,380 6,870 6,150 5,640 5,130

Gas Piping

GAS VALVE
GAS SHUTOFF VALVE
TRAP
(DRIP LEG)
Figure 3-1_Gas Line Connection
All gas connections must be made with pipe joint
com pound resistant to the action of liquefied pe tro leum and
natural gas. All piping must comply with local codes. Tubing
installations must com ply with ap proved standards and
practices. Reference FIG. 3-1 for a typical installation.
Install Piping to Control
1. The gas line should be a separate line direct
from the meter unless the existing gas line is of sufficient
capacity. Verify pipe size with your gas sup pli er.
(continued)
GAS PIPING SIZE CHART
Length of Pipe in Straight Feet
30 40 50 60
205 174 155 141
384 328 292 267
789 677 595 543
1,210 1,020 923 830
2,260 1,950 1,720 1,560 1,440 1,330 1,250 1,180 1,100
3,610 3,100 2,720 2,460 2,310 2,100 2,000 1,900 1,700 1,540 1,400
6,400 5,400 4,870 4,410 4,000 3,800 3,540 3,300 3,000 2,720 2,500
TABLE - 3E
70 80 90 100
128 121 113 106
246 226 210 200
502 472 441 410
769 707 666 636
2. Use new, properly threaded black iron pipe free from chips.
If tubing is used, make sure the ends are cut squared,
deburred and clean. All tubing bends must be smooth and
without deformation.
Internal diameter of flexible lines may not provide proper
volume of gas.
3. Run pipe or tubing to the gas valve or manifold inlet. If
tubing is used, obtain a tube to pipe coupling to connect
the tubing to the gas valve or man i fold inlet.
4. DO NOT OVER TIGHTEN. Over tightening may result in
damage to the gas valves. Valve distortion or malfunction
may result if the pipe is inserted too deeply into the gas
valve.
5. Apply a moderate amount of good quality pipe compound
(DO NOT use Teflon tape) to pipe only, leaving two end
threads bare.
6. Remove seal over gas valve or manifold inlet.
7. Connect pipe to gas valve or manifold inlet. Use wrench to
square ends of the gas valve (FIG. 3-2).
Installation & Service Manual
Capacity of Pipe
in Thousands of
125 150 175 200
for gas pressures
95 86 79 74
179 164 149 138
(0.5 PSIG) or less
369 333 308 287
564 513 472 441
974 871 820
Btu/hr per Cubic
1,300
2,340
4,720
Avoid flexible gas connections.
Maximum
Btu/hr per hour
of 13.5 Inches
Water Column
and a pressure
drop of 0.5 Inch
Water Column
(Based on NAT
GAS, 1025
Foot of Gas and
0.60 Specific
Gravity)
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