Instructions / Assembly

Additional Accessory Available
The Solar Controller
™
has a built in thermostat and humidistat that will measure the attic tempera-
ture and humidity and allow the fan to have extend run time in the evenings or when no solar is
available. Visit www.ussunlight.com for additional information.
™
Thermal Switch - Optional Installation
If your solar fan unit did not come with the thermal switch, it is available for purchase as an accessory
at www.ussunlight.com. The thermal switch will shut down the fan when the temperature drops below
approximately 65˚F and turn the fan back on when the attic temperature rises to approximately 80˚F. To
install the thermal switch, remove the BLACK lead from the fan motor and attach it to the thermal switch.
Attach the other lead from the thermal switch to the BLACK terminal on the motor. Secure the wires to the
motor bracket with tape or zip ties to prevent them from interfering with the fan blade. If you prefer to have
the fan running during cooler seasons to remove moisture from the attic, do not install the thermal switch
(fig. 15). As an upgrade from the mechanical thermal switch, utilize the Solar Controller with an
electronic thermostat and humidistat as well as additional features. Thermal switch must be removed
upon installation of the Solar Controller.
thermal switch
red lead
(leave as is)
black lead from thermal switch
connected to black terminal on motor
original black lead from solar panel to motor
fig. 15
This solar fan will automatically start whenever the sun shines on the solar panel. Always exercise caution when in the vicinity of the fan.
To avoid accidents, use appropriate attire: safety glasses, gloves, hard hats, restraints and other appropriate equipment.
Use this product only as indicated by U.S. Sunlight Corp. Any questions on appropriate applications, call 1-877-50-USSUN.
Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable building codes and
standards, including fire requirements.
To prevent back drafting of any fuel burning equipment in the attic such as a gas furnace, sufficient air is needed for proper combustion
and exhausting of gases through the flue of fuel burning equipment. Follow the requirements made by the heating unit’s manufacturer.
Additionally, follow safety standards set fort by the National Fire Protection Association (NFPA), and the American Society for Heating,
Refrigeration and Air Conditioning Engineers (ASHRAE), and the local code authorities.
Maintenance Tip: The solar panel is most effective when clean and free of dust, leaves, and
debris. Normally, rainwater will cleanse the solar panel and keep it operating at peak efficiency.
If necessary, simply hose off the solar panel between rain showers.
Adjusting the Fan
Step 10 – Adjustments
The fan’s solar panel should be adjusted to maximize exposure to the sun’s path during the day. The
optimal adjustment is to have the panel 90 degrees to the midday path of the sun. You can re-adjust
the panel during winter or summer seasons if desired. (fig. 10)
To adjust the tilt of the panel
Remove screw “A” on both sides of the panel assembly and set aside. (fig. 11) Lift the panel and swing panel braces up to desired
position and re-attach screw “A” in the appropriate holes. There are 3 positions to choose from. (fig. 12)
To adjust the rotation of the panel
Loosen nut “B” (there are four) (fig. 13), then rotate the panel base to the desired position (fig. 14) and re-tighten
the nuts. The panel base can be rotated up to 360 degrees by completely removing nuts “B”, lifting the assembly
off the bolts and re-positioning accordingly. Re-attach the nuts and tighten when completed.
The sun’s path
at midday.
fig. 10
fig. 11
fig. 12
fig. 13 fig. 14
re-attach
screw A
Screw A
Nut B
Tel: 877-50-USSUN
www.ussunlight.com
[e-mail]
4117 Pinnacle Point Dr.
Suite 400
Dallas, TX 75211
www.airvent.com
[e-mail]
1-800-AIR-VENT (247-8368)