Generac Power Systems G007144, Руководство по установке

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Fuel Conversion / Gas Connections
Installation Guidelines For 50 Hz Air-Cooled Generator Sets 23
Section 5: Fuel Conversion / Gas Connections
Fuel Requirements and
Recommendations
NOTE: NG is lighter than air and will collect in high
areas. LP gas is heavier than air and will settle in low
areas.
LP gas should only use a vapor withdrawal system. This
type of system uses vapors formed above liquid propane
in the storage tank.
The unit will run on NG or LP gas, but has been factory-
configured to run on NG.
NOTE: Should the primary fuel need to be changed to
LP gas, the fuel system needs to be reconfigured. See
Fuel Conversion for instructions on converting the fuel
system.
BTU Content
Recommended fuels should have a MJ/BTU content of at
least 37.26 MJ/m
3
(1,000 BTU/ft
3
) for NG; or at least
93.15 MJ/m
3
(
2500 BTU/ft
3
) for LP gas.
NOTE: MJ/BTU fuel content information is available from
the fuel supplier.
Fuel Pressure
Required fuel pressure for NG is 0.87–1.74 kPa (3.5–7.0
in water column) at the generator set fuel inlet. Required
fuel pressure for LP gas is 2.49–2.99 kPa (10–12 in
water column) at the generator set fuel inlet.
NOTE: The primary regulator for LP gas supply is NOT
INCLUDED with the generator set.
NOTE: All pipe sizing, construction, and layout must
comply with all applicable codes, standards, laws, and
regulations pertaining to NG or LP gas applications. Ver-
ify fuel pressure NEVER drops below required specifica-
tion once the generator set is installed.
Always contact local fuel suppliers or fire marshal to ver-
ify codes and regulations for correct installation. Local
codes will mandate correct routing of gaseous fuel line
piping around gardens, shrubs, and other landscaping.
Piping strength and connections should be given special
consideration when installation takes place in areas at
risk for; flooding, tornadoes, hurricanes, earthquakes,
and unstable ground.
IMPORTANT NOTE: Use an approved pipe sealant or
joint compound on all threaded NPT fittings.
NOTE: All installed gaseous fuel piping must be purged
and leak tested prior to initial startup in accordance with
local codes, standards, and regulations.
Fuel Conversion
Proceed as follows to convert from NG configuration to
LP gas:
See
Figure 5-1 . The orange fuel conversion knob (A) is
located above the fuel mixer.
Figure 5-1. Fuel Conversion Knob Location
See Figure 5-2 . A fuel selection hang tag is attached to
the fuel conversion knob. As shown on the tag, in Step 1
the unit is factory-set for NG operation. To change fuel
type to LP gas, press and turn fuel conversion knob (Step
2) towards marked LP fuel source arrow until it stops.
Step 3 shows fuel conversion knob in the LP gas posi-
tion.
Figure 5-2. Fuel Conversion Hang Tag
NOTE: The fuel selection (LPG/NG) must be entered on
the controller during initial power up using the Install
Wizard Menu Map navigation menu, or in the EDIT
menu under “Fuel Selection.”
ISO000192
Fuel and vapors are extremely
flammable and explosive. No leakage
of fuel is permitted. Keep fire and
spark away.
003565
A
NG LP
NG
LPG
1
2
3
006598