Fuel Consumption; Fuel Line Sizing - Honeywell G0062790 Installation Manuallines

Prior to installation of the generator, the installer should consult local fuel suppliers or the fi re marshal to check codes and regulations for proper
installation. Local codes will mandate correct routing of gaseous fuel line piping around gardens, shrubs and other landscaping to prevent any
damage.
Special considerations should be given when installing the unit where local conditions include fl ooding, tornados, hurricanes, earthquakes and
unstable ground for the fl exibility and strength of piping and their connections.
Use an approved pipe sealant or joint compound on all threaded fi ttings.
All installed gaseous fuel piping must be purged and leak tested prior to initial start-up in accordance with local codes, standards and regulations.

5.3 FUEL CONSUMPTION

NOTE: Required fuel pressure is 7-13 mm mercury (3.5-7 in w.c.) for natural gas and 19-22 mm mercury (10-12 in w.c.) for liquid propane
vapor.
These are approximate values, use the appropriate spec sheet or owner's manual for specifi c values.
Unit
7/8 kVA
10/10 kVA
13/13 kVA
* Natural gas is in cubic meters per hour/cubic feet per hour.
** LP is in liters per hour/gallons per hour.
*** Values given are approximate.
Verify that gas meter is capable of providing enough fuel fl ow to include household appliances and all other loads..
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Gaseous fuels such as natural gas and liquid propane (LP) gas are highly explosive. Even the slightest spark can ignite such fuels
and cause an explosion. No leakage of fuel is permitted. Natural gas, which is lighter than air, tends to collect in high areas. LP gas

is heavier than air and tends to settle in low areas.
NOTE: A minimum of one approved full flow manual shut-off valve must be installed in the gaseous fuel supply line. The valve must be
easily accessible. Local codes determine the proper location. The flex fuel line should be plumbed parallel to the back of the generator.
NOTE: The gas supply and pipe MUST be sized at 100% Load Megajoule/BTU rating.

5.4 FUEL LINE SIZING

• First, determine what size pipe is required. Refer to NFPA 54 for NG or NFPA 58 for LP for further information.
• Always refer to the owner's manual for the proper Megajoule/BTU and required gas pressures. To calculate BTU:
– Natural Gas: Megajoules = Cubic meters/hour X 37.26 BTU= Cubic Feet/hour X 1000.
– Liquid Propane Vapor: Megajoules = Cubic meters/hour X 93.15 BTU = Cubic feet/hour X 2500.
• Start by measuring the distance from the generator to the gas source. The generator should be plumbed directly from the source, not off the end
of an existing system.
• When measuring the pipe length, add .76 m (2.5 ft) for every angle or bend in the pipe and add that to the overall pipe distance.
16
Nat. Gas
1/2 Load
2.35/83
3.51/124
4.13/146
Full Load
3.91/138
5.52/195
6.37/225
LP Vapor
1/2 Load
3.41/0.9
4.45/1.18
5.74/1.52
Full Load
5.74/1.52
7.28/1.92
9.53/2.52