PENSOTTI PCC 34-H Instruction Manual page 29

Length of
Pipe In Feet
10
20
30
40
50
60
70
80
90
100
125
Natural Gas flow is given in thousands of BTU/hr. - One cubic foot of natural gas = 1000 BTU
Nominal pressure at the burner for Natural Gas is 3.5" of water column. (Typical machine supply 5"-7")
Pipe length must include additional length for all fittings. Add approximately 5 feet of pipe per fitting
Natural Gas Example: A machine with a burner that requires 440,000 BTU would need a 1 -1/4" pipe for
Liquid Propane
Length of
Pipe in Feet
10
20
30
40
50
60
80
100
125
150
LP Gas flow is given in thousands of BTU/hr. - One cubic foot of LP gas - 2516 BTU
This chart refers to low pressure LP, after regulation Standard nominal pressure at the burner for
Pipe length must include additional length for all fittings. Add approximately 5 feet of pipe per fitting
LP Example: A machine with a burner that requires 440,000 BTU would need a 1" pipe for a 20' long run.
 Make sure the boiler is operating normally.
 Shut down the unit by pressing the ON/OFF button on the control panel.
 Remove the front panel and disconnect the flame rod sensor.
 Restart the boiler. The burner should light but shut down after a few seconds.
 If that is the case, the system is OK. It the burner does not shut down, push the ON/OFF switch to
shut down the boiler and perform a troubleshooting procedure.
INSTALLATION INSTRUCTIONS
Natural Gas Pipe Sizing Chart
Size of Schd. 40 Black Iron Pipe in Inches
1/2" 3/4"
108 230
75 160
61 129
52 110
46 98
42 89
38 82
36 76
33 71
32 68
28 60
a 20' long run.
Gas Pipe Sizing Chart
Size of Schd. 40 Black Iron Pipe in Inches
1/2" 3/4"
275 567
189 393
152 315
129 267
114 237
103 217
89 185
78 162
69 146
63 132
Liquid Propane Gas is 11" of water column.
1" 1-1/4"
387 793
280 569
224 471
196 401
177 364
159 336
149 317
140 239
133 275
126 266
117 243
1" 1-1/4"
1071 2205
732 1496
590 1212
504 1039
448 913
409 834
346 724
307 630
275 567
252 511
1-1/2" 2"
1237 2259
877 1610
719 1335
635 1143
560 1041
513 957
476 896
443 840
420 793
411 775
369 700
1-1/2" 2"
3307 6221
2299 4331
1858 3465
1559 2992
1417 2646
1275 2394
1086 2047
976 1811
866 1606
787 1496
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