Generac Power Systems 04389-2, 04456-2, 04390-2 Location, 2 12KW and 15KW, 990CC Engines

Section 1 — General Information

Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators

NOTE:

The natural gas adjustment screw is preset during installation and should not need any further adjustment.

◆1.9.2 12KW AND 15KW, 990CC ENGINES

To reconfigure the fuel system from NG to LP, follow these steps:

14.It may be necessary to make minor adjustments to the preset adjustment screw settings to achieve maximum power. If experiencing problems with the unit producing maximum power, follow the procedure in Section 2.6 (Adjusting the Fuel Regulator).

Figure 1.4 - Demand Regulator

NOTE:

The primary regulator for the propane supply is NOT INCLUDED with the generator. A fuel pres- sure of 11 to 14 inches of water column (0.6 psi) to the fuel inlet of the generator MUST BE SUP-

PLIED.

1.	Turn OFF the main gas supply.
2.	Remove the engine air in baffle located on the left
	hand side of the battery compartment. Two M6
	screws are located on top of the baffle and two
	M6 screws are located on the inside of the baffle

IDLE CIRCUIT PORT

	OUTLET PORTS
	FUEL HOSE
	BRASS HOSE
	FITTING
U	BRASS HOSE
T	FITTING
1
	TAP
	1/8 NPT
	ADJUSTER
	SCREWS

SMALL

FUEL JET

REGULATOR HOUSING PORT

	towards the back.
3.	Remove the small hose clamp and hose from the
	fuel regulator. It may be necessary to pry the hose
	off of the brass fitting using a screw driver to gen-
	tly lift up the hose edge.
4.	Remove the brass hose fitting screwed into the
	fuel regulator.
5.	Locate and identify the brass idle jet. This will be
	located in the fuel regulator casting facing the
	front of the unit.
6.	Remove the idle jet from its holding location.
7.	Place the idle jet, thread side first, into the
	threaded hole originally occupied by the brass
	hose fitting.
8.	Using a short No. 2 Phillips screw driver, thread
	the idle jet into the regulator casting. DO NOT
	OVER TIGHTEN.
9.	Apply thread sealant to the threads of the hose fit-
	ting and replace it into the regulator body.
10.	Re-attach the small hose and hose clamp and
	tighten as necessary.
11.	Replace the engine air in baffle using the four M6
	screws.
12.	Identify both brass adjustment screws on the reg-
	ulator.

NOTE:

One adjustment screw can be accessed from the front of the unit and the second can be accessed from the back of the unit enclosure by removing the plastic hole plug.

13.To adjust the system to run on LP fuel, turn the adjuster screw that can be accessed from inside the front of the unit, ¼ TURN CLOCKWISE. This should now set the system for maximum power and best performance.

1.10 LOCATION

◆1.10.1 GENERATOR

Install the generator set, in its protective enclosure, outdoors, where adequate cooling and ventilating air is always available. Consider these factors:

•Install the unit where air inlet and outlet openings will not become obstructed by leaves, grass, snow, etc. If prevailing winds will cause blowing or drift- ing, consider using a windbreak to protect the unit.

•Install the generator on high ground where water levels will not rise and endanger it.

•Allow sufficient room on all sides of the generator for maintenance and servicing. A good rule is to allow three feet of space on all sides.

•Where strong prevailing winds blow from one direction, face the generator air inlet openings to the prevailing winds.

•Install the generator as close as possible to the fuel supply, to reduce the length of piping.

•Install the generator as close as possible to the transfer switch. HOWEVER, REMEMBER THAT LAWS OR CODES MAY REGULATE THE DIS- TANCE.

The genset must be installed on a level surface. The base frame must be level within two (2) inches all around.

◆1.10.2 TRANSFER SWITCH

1.10.2.1 7 kW, 12 kW and 15 kW Units

The transfer switch shipped with this generator is enclosed in a NEMA 1 enclosure. This type of enclo- sure is intended for indoor use only. Follow these rules:

8 Generac® Power Systems, Inc.