Quick Start Manual

Circumventing an Obstacle
Wherever possible the branch lines should connect to the
trunk line in straight paths. The fewer turns in a tubing
system, the more efficient air flow. Accordingly, you should
locate the inlets to avoid zig-zags in the branch lines. But,
sometimes, when you just can’t avoid an obstacle, you are
required to construct the tubing around it.
In the example illustrated here, you might run the branch line
at an angle to avoid a chimney. Then, once the branch line
has run past the chimney, you can use a 45° elbow to turn
the branch line back perpendicular to the trunk line. Again,
the branch line and the trunk line connect with a 90° tee.
You can also use the supplied 36˝ piece of flexible tubing to
run a branch line around an obstacle. See “Using Flexible
Tubing,” on page 30.
Completing the Trunk Line
Continue to run the trunk line toward the power unit,
connecting all branch lines as you go along. Again, make
sure you connect all fittings with the air flow toward the
power unit.
Bring the trunk line to the access hole you have drilled for
the power unit’s intake tube. Place a 90° elbow over the hole
and cut the trunk line to fit into this final elbow. Allow 5⁄8˝ of
tubing to fit into the elbow’s collar. Connect the elbow to the
trunk line so that it aligns over the intake access hole. You
will make the intake tube connection itself after you have
installed the power unit.
When you are satisfied that all fittings and tubing are aligned
for maximum air flow, make sure that all your cuts are
square and that all joints are tight. Then, prepare the tubing
and cement the joints as described in “Working With Plastic
Tubing,” page 5.
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