If you've got a small area to cool, you might want to set up your misting system yourself. If someone installs it for you, knowing a bit about installation can help you make informed choices on how it's installed.
Complex systems, commercial and industrial grade systems may well require professional installation. If your manufacturer is outside of your area, they may be able to connect you to licensed and bonded installers in your area. If you have any doubts about installation, contact the manufacturer, since their system may have elements that work in a way unique to their system.
Misting system supply lines are attached to the support structure by hangers that hold it snugly to the framing while allowing a little "give" (back-and-forth movement). This "give" allows for a certain amount of expansion and contraction of the lines that is normal with a misting system. Allowing for this will help prevent damage to the lines, and possibly to the support structure.
How far apart you position the hangers will depend largely on the kind of lines you use. The more flexible the lines, the more closely you'll need to position the hangers. It is recommended that mounts for nylon lines be spaced 32" or less. And the thinner a rigid line's diameter, the more closely you'll need to space the mounts, perhaps 5 feet apart or less. Also, be sure not to bind rigid lines at the ends. Leave about 1/4' for every 10' of line. This will allow them the same kind of "give" as flexible lines. The more securely the whole line is mounted, the more stable the system will be. Loose lines can cause damage to the system and affect where the mist will be directed.
Lines can be hung by perforated metal strapping called "plumber's tape". Using pre-punched, nailed-on steel straps can prevent accidental damage to the lines during installation. Rubberized mounts or straps is another way to minimize any damage and allow for some flexibility in the lines.
The misting lines need to run 8 to 10 feet above the ground on the bottom outside edge of the fascia, header, or beam of the structure's perimeter. It is important to mount the line along the bottom edge of the structure, to prevent mist from spraying onto the top of it, defeating the cooling effect.
In places where it is not possible or not economical
to cool the whole structure or area, set up smaller cool areas.
Check your available power before you select the pump for your misting system. Make sure it is set up with proper GFCI protection. Install your pump near a water and electrical hook-up in a covered area. Choose a spot that is relatively easy to access for mantenance. The best kinds of places are in a equipment shed or garage where it will get ventilation but still be protected from the elements. Install the pump on a level surface, preferably out of the hot sun, out of the rain or any puddles, and away from dust and debris.
If you're unsure about installing it yourself, consider having the unit installed by a qualified electrician.
You'll also want it a bit of a distance away from area you'll be cooling since most pumps can be noisy. Many pumps can be placed up to 400 ft away from the mist line without significant pressure loss. Setting up a noise barrier such as a wall or fence or even some plants can be helpful, just be sure it doesn't interfere with ventilation to the pump.