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Fuel Piping
Pipe Sizing - Natural Gas
1. Refer to Table 1 for pipe length and diame-
ter requirements. Based on rated ELITE
input (divide by 1,000 to obtain cubic feet
per hour).
-Table 1 is based on Natural Gas with a
specific gravity of 0.60 and a pressure
drop through the gas piping of
0.30”w.c..
- For additional gas piping sizing infor-
mation, refer to ANSI Z223.1. For
Canadian installations refer to B149.1
or B149.2.
Natural Gas Supply Pressure Requirements
1. Pressure required at the gas valve inlet
supply pressure port:
- Maximum 13”w.c. at flow or no flow
conditions to the burner.
- Minimum 5”w.c. during flow condi-
tions to the burner. Must be verified
during start up.
2. Install 100% lockup gas pressure regulator
in the gas supply line if inlet pressure can
exceed 13”w.c at any time. Adjust the lock-
up pressure regulator for 13”w.c maximum.
Pipe Sizing - Propane Gas
1. Contact the local propane gas supplier for
recommended sizing of piping, tanks and
100% lockup gas regulator.
Propane Gas Supply Pressure Requirements
1. Adjust the propane supply regulator pro-
vided by the gas supplier for 13”w.c. max-
imum pressure
2. Pressure required at the gas valve inlet sup-
ply pressure port:
- Maximum 13”w.c. at flow or no flow
conditions to the burner
- Minimum 5”w.c. during flow condi-
tions to the burner. Must be verified
during start up.
