22 Generac
®
Power Systems, Inc.
Section 2 – Installation
CENTURION 3500 Home Standby Generator
2.1
SITE PREPARATION AND
GENERATOR PLACEMENT
2.1.1 SITE PREPARATION
1. Clear an area 5-1/2 feet by 3-1/2 feet of grass and
vegetation to a depth of five inches. This includes
the distance the generator should be set away
from a structure (three feet) and six inches
beyond the width and length of the generator
mounting pad (30" L x 24" W).
2. Lay black poly-film to cover the area.
3. Fill the area to ground level with pea gravel or
crushed stone.
2.1.2 ATTACH GENERATOR TO MOUNTING
PAD
Place the mounting pad in the exact desired location.
Bring the generator, still attached to the shipping pal-
let, to the prepared area and place it along side of the
mounting pad. Remove and discard the two (2) lag
screws that hold the generator to the shipping pallet.
Using a minimum of two adults, hold the mounting
pad in place, gently slide the generator off of the ship-
ping pallet and onto the mounting pad. Align the
holes in the generator base with the holes in the
mounting pad. Use the supplied fasteners to attach
generator to base (Figure 2.1).
Four Each: 1” long hex head cap screw, lock washer
and flat washer.
Figure 2.1 — Attach Generator To Pad
4. Drive an 8-foot grounding rod into the ground to
grade.
A. Attach one end of the grounding strap (No. 12
AWG stranded copper wire) to grounding rod
and the other end to the grounding lug (located
at rear of unit). Make sure grounding rod and
strap are not exposed above ground level. (NEC
code applies to grounding method.)
Figure 2.2 — Grounding Lug
2.2
POWER CORD INSTALLATION
2.2.1 DRILL PASS THROUGH HOLE
The power transfer monitor needs to be located in a
position that is appealing to the homeowner.
Recommended locations are underneath or inside a
kitchen or utility room cabinet, or in a basement
where access is convenient. The homeowner should
test multiple positions to find the most appealing
one. It is not recommended that the power transfer
monitor be located where water may be present, such
as under a sink.
Determine where the flexible watertight conduit
(power cord) will pass through the house from inside
to outside (Figure 2.3). When certain there is clear-
ance on each side of the wall and within the wall,
mark the location. Drill a small pilot hole to aid loca-
tion of hole saw. Drill 1-1/4 inch diameter hole
through the wall with hole saw.
Figure 2.3 — Pass Through Hole
2.2.2 FEED POWER CORD OUT TO
GENERATOR
From the room inside the home where the Power
Transfer Monitor will be located, feed the end of the
power cord through to outside of exterior wall (Figure
2.4).
DO NOT
connect power cord to generator at
this time.
030795 SCREW HHV 5/16"-18 X 1"
022129 WASHER LOCK 5/16"
022145 WASHER FLAT 3/8"
Grounding Lug
