Baldor GLC GENERATOR GLC45 User Manual
Page 39
Receiving & Installation 3-7
MN2408
Example: Determining Pipe Size for Natural Gas
A generator has a 16Hp engine 60 feet from the supply.
Determine the supply pipe size for Natural Gas fuel.
16 x 10,000 = 160,000 BTU’s / per hour for proper operation.
160, 000
1, 096 +
146 cubic feet per hour.
From Table 3-6, a 60 foot run requires a minimum 1” pipe at full engine load.
Natural Gas Connections
The incoming pressure must be 11 inches water column (6 oz. pressure).
Table 3-5 Natural Gas Flow Rate (Cubic Feet per Hour) per Pipe Length
Pipe
Length
Iron Pipe Size
Length
(Feet)
1
/
2
″
3
/
4
″
1
″
1–
1
/
4
″
1–
1
/
2
″
2
″
2–
1
/
2
″
3
″
4
″
6
″
8
″
15
73
165
332
722
1174
2386
3704
6253
13352
37229
30
50
115
232
515
818
1712
2646
4521
9331
26330
53728
45
41
95
191
418
673
1419
2213
3752
7600
22462
43867
60
37
83
166
366
587
1241
1924
3319
6542
18595
37999
75
74
149
332
524
1077
1684
2886
5772
16652
33959
90
67
137
298
433
962
1501
2597
5291
15200
31025
105
63
126
274
885
1376
2357
4906
14064
28715
120
115
260
404
827
1289
2213
4618
13160
26859
150
105
233
366
750
1174
2011
4185
11775
24050
180
96
216
337
693
1077
1876
3848
10736
21934
210
89
197
308
635
991
1712
3559
9937
20298
240
183
289
596
933
1616
3357
9235
18990
270
171
274
558
875
1520
3127
8658
17903
300
164
260
524
827
1433
2886
8177
16998
Note: Almost all operation problems are related to the installation techniques used. Do Not
guess, be sure pipe size is adequate for required flow rate.
1.
Connect the proper size gas pipe at the Inlet Connection to the Fuel Lock Solenoid.
Connect the Natural Gas pipe line shown in Figure 3-3 using the correct size pipe for
the required flow rate and length of pipe. Refer to Table 3-5 for pipe size. Be certain
that all connections are sealed and no leaks are present. The installer must ensure
that all gas connections comply with all building codes.
2.
Verify Fuel Supply Pressure
Prior to initial operation of generator, verify that fuel system pressure is 11
″ Water
Column (6 oz. pressure) and fuel pipe sizes comply with Table 3-5.
3.
Proceed to Electrical Connections.
Figure 3-3 Gas Line Connections
Solenoid, Fuel Lock
Inlet Connection
Air Cleaner
Carburetor
Mounting Bracket
Additional Valve
(Safety Shutoff Valve)
Supply Piping
U.L. requires a second shutoff valve and regulator to be installed in the supply piping to
control the gas supply to the generator.
Additional Regulator
(11 - 14" water column pressure)
External Supply Piping (by installer)
To Inlet
Connection