Generac Power Systems 4270-0 - Manual (Page 25)

Section 2
-
Installation INSTALLATION
QUIETPACT“ 75D Recreational Vehicle Generator
♦ 2.T.4 GENERATOR RESTRAINT__________________
Use four 3/8"-16 hardened steel bolts (Grade 5) to fas­
ten the generator to the supporting frame or the sup­
port tubing. These bolts must pass through (a) the gen­
erator mounting base, (b) the compartment floor (if a
compartment is used) and (c) the supporting frame­
work (Figure 2.2). All bolts must be long enough so that
when tight, are engaged at least 3/8” of an inch [9.5 mil­
limeters]. Refer to Section 2.2 for the location of the
generator mounting holes.
Figure 2.2 - Typical Generator Restraint
Figure 2.3 - Typical Compartment Construction
METAL LINED t/2 INCH THICK
2.2 GENERATOR COMPARTMENTS
Whether the generator set is being installed inside a
compartment specifically manufactured to house a gen­
erator or inside a compartment that the installer con­
structs, the compartment MUST meet certain specifi­
cations as outlined in the following sections:
• 2.2.T COMPARTMENT CONSTRUCTION * •
• The generator compartment should be either
constructed of, or lined with, 26-gauge galva­
nized steel.
NOTE:
Aluminum is NOT an acceptable alternative
to galvanized steel due to aluminum’s low
melting point.
• If the compartment is lined with galvanized steel, it
may be constructed of any material. Generac rec­
ommends that the compartment be constructed of
1/2-inch thick plywood (not strandboard), with the
floor made of a double thickness of 1/2-inch ply­
wood with the grain of the wood at cross section
for added strength (Figure 2.3).
• If constructing a compartment, line the exterior
(underside) of the compartment floor with 26-
gauge galvanized steel.
• All seams, splices and joints of the compartment
walls (unless vapor tight by design) should
be caulked to prevent poisonous, flammable or
explosive vapors from entering the vehicle interior.
NOTE:
Caulking must be done so that the caulking materi­
al will stay in place permanently. Pressing such
materials as putty tape onto joints and seams is NOT
acceptable. A high quality silicone rubber base
sealant is recommended.
• Holes and openings made in the compartment
walls to allow for the passage of electrical conduit,
conductors, hoses, cables, etc., into the vehicle liv­
ing area must be sealed vapor tight with silicone
rubber base sealant.
• If flexible metal conduit is used, it must be sealed
internally at the end where it terminates inside the
compartment’s electrical junction box.
NOTE:
Flexible metal conduit, due to its unique con­
struction, is NOT vapor tight along its entire
length.
Generac* Power Systems, Inc. S3