page 6
FITTING MAIN LINE TO POWER UNIT
Your power unit is capable of being connected to the intake
vacuum trunk line from either side. Select the intake
connection to be used. Some installations may require the
connection into both intakes. The power unit has 4 intake
connections, which 2 of them are factory sealed.
1. Using provided coupling (part no. V127),
attach the utility valve assembly to the
vacuum trunk line feeding into the
power unit. The utility valve can be
installed on the left or right hand side.
2. Cap off the unused intake tube with the plastic cap provided.
3. Attach exhaust tube to power unit using provided coupling
(part no. V127) (if vented to the outside).
4. Make sure all tubing connections are air tight.
5. The exhaust should NOT be vented into a wall, ceiling or
concealed space in the house. It is recommended to vent
the vacuum exhaust air to the outside of the house.
Exterior vented exhaust lines should be terminated using
Model V142 wall caps.
DIMENSIONAL CHART
Models VX475CC VX550CC VX1040CC
A 36
9
⁄16” 39
9
⁄16” 39
9
⁄16”
B 11” 11” 11”
C 10
7
⁄8” 10
7
⁄8” 10
7
⁄8”
CAUTION
NuTone VX475CC, VX550CC and VX1040CC power
units will attach to the lower intake connections.
See Fig. 4. Utility valve can be installed on either
side.
INTERNAL
WIRING DIAGRAMS
• VX475CC • VX550CC
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