Lochinvar 000 - 500 User Manual
Page 14
FIG. 16 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 Figure 16 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.
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.
Avoid flexible gas connections. 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.
Thread pipe the proper amount for insertion into gas
valve or manifold inlet as shown in Table H.
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. 17).
14
Nominal
Iron Pipe
Length of Pipe in Straight Feet
Size, Inches
10
20
30
40
50
60
70
80
90
100
125
150
175
200
3/4
369
256
205
174
155
141
128
121
113
106
95
86
79
74
1
697
477
384
328
292
267
246
226
210
200
179
164
149
138
1 1/4
1,400
974
789
677
595
543
502
472
441
410
369
333
308
287
1 1/2
2,150 1,500
1,210
1,020
923
830
769
707
666
636
564
513
472
441
2
4,100 2,820
2,260
1,950
1,720
1,560
1,440
1,330
1,250 1,180
1,100
974
871
820
2 1/2
6,460 4,460
3,610
3,100
2,720
2,460
2,310
2,100
2,000 1,900
1,700
1,540 1,400
1,300
3
11,200 7,900
6,400
5,400
4,870
4,410
4,000
3,800
3,540 3,300
3,000
2,720 2,500
2,340
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
4,720
Maximum Capacity of Pipe in Thousands of BTU’s per hour for gas pressures of 13.5 Inches Water Col umn
(0.5 PSIG) or less and a pressure drop of 0.5 Inch Water Column (Based on the calorific value of Natural Gas,
1025 Btu/ft
3
@ 0.60 Specific Gravity)
TABLE - H
MULTIPLE APPLIANCE INSTALLATIONS
GAS PIPING SIZE CHART
GAS PIPING