NuTone VX550 Installation Guide download pdf (Page 26)

Once you have installed all your inlets, you can complete

the network of tubing that connects your inlets to the

power unit. This network consists of the following parts:

90° Elbows – Used for connecting

the inlet lines to the branch lines.

Also used for making smooth 90°

turns in branch lines or trunk lines.

45° Elbows – Used for a 45°

tubing turn in branch or trunk lines.

90° Tees – Used to connect branch

lines to the trunk lines.

Stop Couplings – Used to join

two lengths of tubing.

Flexible Tubing – Used to bypass

obstacles or to make difficult S-turns

in branch lines. This tubing is

supplied in a 36” length; it is not the

same as the inlet flex tube.

PVC Tubing – 8’ straight sections

of tubing used for inlet, branch and

trunk lines.

Use the tubing and fittings to run branch lines from the inlet

tubing to a main trunk line. Begin at the farthest inlet from

the power unit and work your way toward the power unit.

When you assemble sections with elbows and tees, make

sure the curve in the fitting is aligned so that the air flows

toward the power unit.

Assemble the entire network of tubing and fittings, making

sure every joint is accurately cut and aligned. Then, go back

and cement all the joints. You may run the wiring and make

the wiring connections after the network is assembled and

cemented, or you may make the wiring connections as you

assemble the network. Use the method that best suits your

needs.

Beginning the Trunk Line

Start the inlet line which is farthest from the power unit.

Place 90° elbow onto a section of tubing and align it with the

inlet tubing at the height it will run across the attic joists.

Mark the inlet tubing where the elbow will join, allowing 5/8˝

for the tubing that inserts into the fitting collar.

Now, cut the inlet tubing at the marked line. Make sure the

cut is straight and even. Attach the elbow and check its fit.

Then, insert the first section of tubing into the other end of

the elbow.

ASSEMBLING THE TUBING SYSTEM

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NuTone VX550 Installation Guide Page 26

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