Honeywell 6442 Manual To Operations page 7

NATURAL GAS INSTALLATION
BTU and
Pressure Decal
Flex Fuel Line
Size gas pipe with Generator Sizing Guide or to local codes.
Fuel Pipe Sizing Natural Gas
Natural Gas 5" to 7" of Water Column
Table 4a
(Table values are maximum pipe run in feet.)
kW 0.75" 1"
11 20 85
15 40
20 20
25
35
45
60
70
80
100
130
150
Check Distance with
Gas Provider
Safety Shut-Off
with Pressure Port
Pipe Size (in)
1.25" 1.5" 2" 2.5"
370 800
190 425
130 305 945
85 203 552
35 95 370 915
50 230 585
25 145 390
5 75 225
65 195
40 140
Table 4b
3"
kW
11
15–17
20
1185
710
630
Natural Gas
460
1 cubic foot = 1,000 BTU
50 215
1 therm = 100,000 BTU
30 150
Gas consumption = 13,000-16,000 BTU per kW/hr
Pressure
1 inch mercury = 13.61 inches water column
1 inch Water Column = 0.036 psi
3.5–7 inches water column = 0.126 psi to 0.252 psi
Note:
– Pipe sizing is based on 0.5" H
– Sizing includes a nominal number of elbows and tees.
– Please verify adequate service and meter sizing.
– Tables based on black pipe.
Size Meter for Generator Load
Plus ALL Appliances
For Underground Installations Verify
Piping System for Code Compliance
Natural Gas 3.5" to 5"
of Water Column
(Table values are maximum
pipe run in feet.)
Pipe Size (in)
0.75" 1" 1.25" 1.5"
30 125 200
10 60 125
10 60 125
O pressure drop.
2
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