Shutoff Valve; Flexible Fuel Line; Sediment Trap; Checking Gas Line Connections - Generac 8 kW Directries De Instalación

Section 5: Fuel Conversion/Gas Connections
Verify the capacity of the natural gas meter or the LP tank
in regards to providing sufficient fuel for both the
generator and other operating appliances.

Shutoff Valve

Most applications will require an external manual full flow
shut-off valve on the fuel line. The valve must be easily
accessible. See A in Figure 5-3.
NOTE: Local codes determine the proper location.
Figure 5-2. Accessory Valve with Manometer Port
NOTE: Figure 5-2 illustrates a fuel shut-off valve with a
manometer port for making fuel pressure checks. This
accessory valve permits making pressure checks without
going into the generator enclosure.
Valves available through Generac and Independent
Authorized Service Dealers:
• 1/2" ball valve, part number 0K8752
•
3/4" ball valve, part number 0K8754

Flexible Fuel Line

When connecting the gas line to the generator, use a
hose assembly that meets the requirements of ANSI
Z21.75/ CSA 6.27 - Connectors for outdoor Gas
Appliances and Manufactured Homes or AGA-approved
flexible fuel line in accordance with local regulations.
The purpose of flexible fuel line is to isolate vibration from
the generator to reduce possibility of a gas leak at one of
the connection points. It is important the line be installed
with as few bends as possible. The flex fuel line should
be horizontal and plumbed parallel to the back of the
generator. See B in Figure
CAUTION
Equipment damage. Do not bend flexible fuel line.
Bends in fuel line restrict fuel flow and reduce
ability to absorb vibration.
20
000743
5-3.
(000205)

Sediment Trap

Some local codes require a sediment trap. Install the
recommended sediment trap as illustrated. See C in
Figure 5-3.
Figure 5-3. Sediment Trap, Manometer Port, and
Flexible Fuel Line

Checking Gas Line Connections

Check for leaks by spraying all connection points
1.
with a non-corrosive gas leak detection fluid. You
should not see the solution be blown away or form
bubbles.
Check gas pressure at the regulator in the
2.
generator by following these steps.
•
Close gas supply valve.
• Remove the top gas pressure test port from the
regulator (see Figure
pressure tester (manometer).
• Open the gas supply valve and verify the pressure
is within the specified values.
NOTE: Gas pressure can also be tested at the
manometer port on the fuel shut-off valve shown in
Figure 5-3.
NOTE: See owner's manual or spec sheet for proper fuel
pressure specifications. If the gas pressure is not within
specifications, contact the local gas supplier.
Close gas valve when completed.
3.
Figure 5-4. Checking Pressure with Manometer
Installation Guidelines For 60 Hz Air-cooled Generators
A
B
C
000617
5-4) and install the gas
000848