9
PHOTOVOLTAIC MODULES SAFETY
AND INSTALLATION MANUAL Rev. K
VALID IN NORTH AMERICA ONLY
Valid from September 2010
1305 S. Bertelsen Road Eugene, OR 97402
www.grapesolar.com
Tel: 1-877-264-1014 (toll free), 1-541-349-9000, Fax: 1-541-343-9000
nut (with torque less than 4N•m). Grounding wire should be directly connected with the
screw.
4.4
The rack must also be grounded unless they are mechanically connected by nuts and bolts to the
grounded PV modules. The array frame shall be grounded in accordance with NEC Article 250.
Figure-1 Grounding panel frame with stainless steel grounding & bonding equipment
5.
Mounting
5.1
The modules have been evaluated by UL for a maximum positive or negative design loading of
30 lbs/ft
2
. The maximum load on the module must not exceed 2400 Pascal (50 lbs/ft
2
).
5.2
Each module must be securely fastened at a minimum of 4 points using support frames or
mounting kits specialized for PV applications.
5.3
Panels may be mounted at any angle from vertical to horizontal orientation. However, to obtain
maximum yield from the PV system, the direction and tilt angle for the modules shall be set to
receive the incident sunlight perpendicularly to the module surface.
5.4
For roof mounted systems, at least a 2 inch clearance is required between the module back
surface and roof for rear ventilation and module cooling.
5.5
Clearance of a quarter inch or more between modules is required to allow for thermal expansion
of the frames.
5.6
Keep the back surface of the module free from any foreign objects or structural elements which
could come into contact with the module, especially when the module is under mechanical load.
5.7
To prevent water from entering the junction box, which could result in a safety hazard, modules
should not be mounted with the front/top glass facing downward.
5.8
Clearance between the module frames and structure or ground is required to prevent wiring
1
Stainless steel M5 nut
2
Stainless steel cupped M5 washer
3
Stainless steel flat M5 washer
4
Stainless steel M5 serrated washer
5
Grounding lead
6
Stainless steel M5 bolt
