Install Manual

Site Selection and Preparation
Installation Guidelines for 60 Hz Air-Cooled Generators 15
Annex A — Explanatory Material
A4.1.4 (2) Means of demonstrating compliance are by
means of full scale fire test or by calculation procedures.
Because of the limited spaces frequently available for
installation, it has become apparent that exception (2)
would be beneficial for many residential and commercial
installations. With that in mind, the manufacturer
contracted with an independent testing laboratory to run
full scale fire tests to assure the enclosure will not ignite
combustible materials outside the enclosure.
NOTE: Southwest Research Institute testing approves
18 in (457 mm) installation minimum from structure
(Figure 3-1, C). Southwest Research Institute is a
nationally recognized third party testing and listing
agency.
The criteria was to determine the worst case fire scenario
within the generator and to determine the ignitability of
items outside the engine enclosure at various distances.
The enclosure is constructed of non-combustible
materials, and the results and conclusions from the
independent testing lab indicated that any fire within the
generator enclosure would not pose any ignition risk to
nearby combustibles or structures, with or without fire
service personnel response.
Figure 3-2. Southwest Research Institute Marking
http://www2.swri.org/www2/listprod/
DocumentSelection.asp?ProductID=973&IndustryID=2
Based on this testing and the requirements of NFPA 37,
Sec 4.1.4, the guidelines for installation of the generators
listed above are changed to 18 in (457 mm) from the
back side of the generator to a stationary wall or building
(C). For adequate maintenance and airflow clearance,
the area above the generator should be at least 5 ft (1.52
m) with a minimum of 3 ft (0.91 m) at the front and ends
of the enclosure. This includes trees, shrubs, and
bushes. Vegetation not in compliance with these
clearance parameters could obstruct air flow. In addition,
exhaust fumes from the generator could inhibit plant
growth. See Figure 3-1 and the installation drawing
within the owner’s manual for details.
NOTE: If the generator is not set to OFF, it can crank and
start as soon as the battery cables are connected. If the
utility power supply is not turned off, sparking can occur
at the battery posts and cause an explosion.
Site Preparation
• Locate the mounting area as close as possible to
the transfer switch and fuel supply.
• Leave adequate room around the area for service
access (check local code), and place high enough
to keep rising water from reaching the generator.
• Choose an open space which will provide
adequate and unobstructed airflow.
•
•
Place the unit so air vents will not become clogged
with leaves, grass, snow, or debris. Verify exhaust
fumes will not enter any building through eaves,
windows, ventilation fans, or other air intakes (see
Site Selection).
Select the type of base, such as—but not limited
to—compacted soil, gravel, or concrete, as desired
or as required by local laws or codes. Verify your
local requirements before selecting.
002158
002158a
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
Asphyxiation. Running engines produce
carbon monoxide, a colorless, odorless,
poisonous gas. Carbon monoxide, if not
avoided, will result in death or serious injury.
(000103)
DANGER