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Maximum Liquefied Propane Delivery Capacity
In Thousands of BTU/H (0.5 in WC pressure drop)
Length (including fittings)
Pipe
10 ft
20 ft
Size
(3 m)
(6 m)
/
in
291
200
1
2
/
in
608
418
3
4
1 in
1,150 787
1
/
in
2,350 1,620 1,300 1,110 985
1
4
1
/
in
3,520 2,420 1,940 1,660 1,480 1,340 1,230 1,140 1,070 1,010 899
1
2
2 in
6,790 4,660 3,750 3,210 2,840 2,570 2,370 2,200 2,070 1,950 1,730 1,570 1,440
4.2 Measuring the Inlet Gas Pressure
WARNING
The boiler cannot function properly without sufficient inlet gas pressure. Measuring the inlet gas pressure
should be performed by a licensed professional only.
The inlet gas pressure must be maintained between 3.5 in and 10.5 in WC for natural gas and between 8.0 in
●
and 13.0 in WC for liquefied propane.
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during
●
any pressure testing of that system at test pressures in excess of
The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff
●
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than
(3.5 kPa).
50
Connecting the Gas Supply
30 ft
40 ft
50 ft
60 ft
(9 m)
(12 m)
(15 m)
(18 m)
160
137
122
110
336
287
255
231
632
541
480
434
892
70 ft
80 ft
90 ft
100 ft
(21 m)
(24 m)
(27 m)
(30 m)
101
94
89
84
212
197
185
175
400
372
349
330
821
763
716
677
/
psi (3.5 kPa).
1
2
125 ft
150 ft
175 ft
(38 m)
(45 m)
(53 m)
74
67
62
155
140
129
292
265
243
600
543
500
814
749
/
psi
1
2
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