SOLAR COLLECTOR INSTALLATION
COLLECTOR LOCATION
Proper location and orientation of the solar collectors is important for maximum system efficiency. The collec- tors should be unshaded from 10:00 am through 3:00 pm each day in every month of the year and should be located as close to the storage tank as possible to mini- mize heat loss in the piping runs. The best orientation is achieved when the collectors are facing due south +/- 45°
and tilted at an angle from the horizontal equal to the latitude of the location + 15°. A steeper angle provides better winter performance as the sun is lower in the sky. The collectors will also shed snow more effectively at the steeper angle. Figure 10 below shows many alternatives for collector mounting. Placing the collectors as close as possible to the peak of the roof will make installation easier by providing increased attic access.
Figure 10
GENERAL CONSIDERATIONS
The contractor shall obtain all required permits and approvals.
The installation shall conform to all federal, state and local regulations, codes, ordinances and standards governing solar water heating system installations and the contractor shall adhere to sound building safety and trade practices. Special consideration must be given to building code requirements for the penetration of structural members and fire rated assemblies.
Ensure the mounting surface is solid and able to withstand in excess of 330lbs / 150kg of pull force
that may be encountered during high winds. Consult a structural engineer if in doubt.
The solar collector must be located in a structurally sound area of the roof that will be unshaded for the majority
of the day all year round. Adjacent buildings and trees should be checked for possible winter shading. An instru- ment such as the Solar Pathfinder (www.solarpathfinder. com) can be used for solar site analysis.
Before the installation the contractor shall inspect the condition of the roof and notify the homeowner of any existing roof damage or necessary repairs.
13
