NuTone VX550 Installation Guide download pdf (Page 27)

Joining Straight Lengths of Tubing

Both branch lines and the trunk lines may require lengths of

tubing longer than those 8´ sections supplied. Use stop

couplings to join two straight lengths of tubing. Insert one

end of the tubing into the stop coupling; join the

second length of tubing into the other end of the stop

coupling. Stop couplings are also used to join long

vertical branches which run from one level to another level

of a house.

Connecting a Branch Line

A branch line connects the inlet line to the trunk line. Follow

the methods previously described for aligning, marking and

cutting the inlet tubing. Attach a 90° elbow and run tubing from

the inlet line to the trunk line.

To align and measure the branch line, attach a 90° tee

fitting to the trunk line. Make sure the tee connects with the air

flow going toward the power unit. Align, measure, and mark

the branch line for inserting it into the tee fitting. Then, cut the

branch line to length and insert it into the tee. Check to make

sure the cut is straight and even. Connect the next section of

tubing to the out-take side of the tee fitting. Continue the trunk

line until you come to another branch line junction point.

Branch Line

Make sure

air flows

toward

Power Uni t

To Power Unit

AO0057A

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NuTone VX550 Installation Guide Page 27