Broan-NuTone Rangemaster RMIP33 Guide D'installation page 7

10. REMOVE THE KNOCK-OUT OPENING (INTERIOR BLOWER)
Remove the knockout on rough-in plate. See picture below.
When using P5 blower, remove the 10'' wide knockout (smaller part). If using P8 blower, remove
the knockout corresponding to the ducting installed (10'' or 14'' adapter/damper).
11. INSTALL THE DEVIATOR (INTERIOR BLOWER)
Install the deviator as shown.
NOTE: To prevent the deviator from sliding out of the rough-in
plate, put some tape on the deviator base after sliding it
into the rough-in plate (provided with the P5 and P8 blower)
opening. If installed correctly, the deviator will protrude
about 1/8" above the rough-in plate.
12. INSTALL THE ADAPTER (INTERIOR BLOWER)
Using two (2) #6 x 1/2'' screws provided with insert, secure the adapter to the top of the rough-in plate.
Remove tape from damper flap. Seal the adapter to the rough-in plate by using duct tape.
HD0005
CAUTION
HD0077
Removing vertical knockout opening on rough-in plate
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HD0087
HD0006