Milton CAT G200LG4 200kW_250kVA LG Installation Guide - Manual (Page 9)

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Follow the local codes on selecting the required AGA
approved, and UL listed, for NG application flexible
portion of the fuel line (supplied by the installing
contractor).
‹ 1.7.4 LP GAS VAPOR WITHDRAWAL SYSTEM
This type of system utilizes the vapors formed above
the liquid fuel in the supply tank (see Figure 1.3).
Approximately 10 to 20 percent of the tank capacity
is needed for fuel expansion from the liquid to the
vapor state. Gas pressure requirements for an LP
vapor system at the frame of the generator are the
same as those listed for natural gas in "The Natural
Gas System". See Table 1 for information regarding
the vapor capacity of LP tanks. The installer should
be aware of the following:
• When ambient temperatures are low and engine
fuel consumption is high, the vapor withdrawal
system may not function efficiently.
• Ambient temperatures around the supply tank
must be high enough to sustain adequate vaporiza-
tion or the system will not deliver the needed fuel
volume.
Section 1 — General Information
Liquid-cooled Generators
Gas Actuator Primary Regulator
(Supplied by
Installing
Contractor)
11 - 14" Water
Column (>= 70 kW)
5 - 14" Water
Column (< 70 kW)
Flex Fuel Line
(Supplied
with Unit)
Generator Base
Fuel Shutoff/Regulator
Assembly
Manual Shutoff
Valve
Figure 1.2 — Typical Natural Gas System
Gas Actuator
Primary Regulator
(Supplied by
Installing
Contractor)
11 - 14" Water
Column (>= 70 kW)
5 - 14" Water
Column (< 70 kW)
Flex Fuel Line
(Supplied
with Unit)
Generator Base
Fuel Shutoff/Regulator
Assembly
Manual Shutoff Valves
Fuel
Tank
Figure 1.3 — Typical LP Gas Vapor Withdrawal System