Generac
®
Power Systems, Inc.
11
Section 2 – Installation
Generac Standby Generator Sets
2.9.1.1 Transfer Switch
If this generator is used to supply power to any elec-
trical system normally powered by an electric utility,
the National Electrical Code requires that a transfer
switch be installed. The transfer switch prevents elec-
trical backfeed between two different electrical sys-
tems. (For additional information, see the applicable
transfer switch manual for this unit.) The transfer
switch, as well as the generator and other standby
components, must be properly located and mounted
in strict compliance with applicable codes, standards
and regulations.
2.9.1.2 Fuel System
Make sure the fuel supply system to the generator (a)
delivers the correct fuel at the correct pressure and
(b) is properly purged and leak tested according to
code. No fuel leakage is permitted. See
“Specifications” (Page 7) for more information.
If the unit has been idle for a long period of time, or
if the fuel lines or system components have been
removed and reinstalled, the fuel system may require
bleeding to remove air from the system. Air in the
fuel system causes hard starting and rough opera-
tion. All fuel system lines must be installed and must
be tight. A loose line may show no sign of leakage, but
may draw air into the system.
Use a suitable container to catch the fuel that
will spill during system bleeding process. Clean
up all spilled fuel after bleeding.
2.9.1.3 Generator Set Lubrication
Check the engine crankcase oil level before operating
and add oil to the proper level – the dipstick “FULL”
mark. Never operate the engine with the oil level
below the dipstick “ADD” mark. See “Specifications”
(Page 7) and “Engine Oil Recommendations” (Page 8).
NOTE:
This engine is shipped from the manufacturer
with 15W-40 oil. This oil should be changed after
30 hours of operation.
The engine is equipped with a mechanical governor.
Make sure the governor is properly lubricated with
clean engine oil.
2.9.1.4 Engine Coolant
Have the engine cooling system properly filled with
the recommended coolant mixture. Check the system
for leaks and other problems. See “Specifications”
(Page 7) and “Coolant” (Page 8).
2.9.1.5 Belt Tension
Check the engine fan belt tension and condition prior
to placing the unit into service and at recommended
intervals. Belt tension is correct when a force of
approximately 22 pounds (10 kg), applied midway
between pulleys, deflects the belt about 3/8- to 5/8-
inch (10 to 16 mm).
2.9.1.6 Electrical System
Make sure the generator is properly connected to an
approved earth ground.
Make sure the generator battery is fully charged,
properly installed and interconnected, and ready for
use.
Check to ensure that there are no loose electrical con-
nections. Restrain any loose wires to keep them clear
of any moving generator set components.
2.9.1.7 Rodent Protection
Make sure the four 3-inch diameter cap plugs (part #
A8785) are properly installed in the tie-down holes in
the side rails of the unit’s base frame (Figure 2.4).
The cap plugs are shipped in a plastic bag located in
the lower connection box. These plugs are needed to
prevent rodents from accessing the interior of the
generator set. On acoustic units, cap plugs also are
needed to stay within noise specification limits.
Figure 2.4 – Base Frame Cap Plugs
2.9.2 START-UP INSPECTION
A standard three-part form titled “Start-up
Inspection for Standby Power Systems” (part #
67377) should be completed by the installation tech-
nician or engineer. As stated on the form, inspections
are to be accomplished only by factory-trained per-
sonnel. The installer should complete the form and
disseminate copies as follows:
• White copy: Mail to Generac Warranty Department,
P.O. Box 8, Waukesha, WI 53187.
• Pink Copy: For service file of installing dealer.
• Yellow Copy: For the customer’s records.
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