NuTone 8673RP - Manual (Page 3)

POWER/BLOWER UNIT INSTALLATION
1. Refer to Figure 1. Place power/blower unit into housing so that mounting
plate's tabs insert into slots in housing.
2. Press other end of mounting plate down until it is firmly seated over scroll and
plug-in receptacles.
3. Secure mounting plate to housing with provided screw.
4. Insert motor plug into junction box receptacle.
COMPLETING INSTALLATION
1. Insert lamp plug into junction box receptacle and secure reflector assembly to
motor frame with wing nut provided.
2. Install lamps 100 watt (maximum) for light, and 7 watt (maximum) for
night light (Night light not provided on 8664RP).
3. Squeezing the grille assembly's mounting springs together, insert springs into
slots on both sides of housing.
4. Press grille assembly firmly into place against ceiling.
INSTALLATION IN EXISTING CONSTRUCTION
Locate fan between ceiling joists.
Plan ducting wiring before proceeding with installation. Refer to Figure 4 for
wiring. CAUTION: Check area above planned location to be sure that:
1. Ducting can be installed.
2. Wiring can be run to the planned location.
3. No wiring or other obstruction might interfere with installation.
I NSTALLATION FROM ACCESSIBLE AREA ABOVE
1. After determining desired location for fan, drill a small hole in the ceiling. Place
a coat hanger or other stiff wire up through hole to help in locating from above.
2. Place fan housing on top of ceiling surface and use the housing as a template
to mark area to be cut out. Cut round hole 13 1 ⁄
8
" in diameter for rough opening.
3. After cutting out opening, mount housing in the opening using the hanger bars
provided.
A. Insert hanger bars in slots in housing.
B. Position housing in opening so that bottom of housing is flush with ceiling.
C. Use screws or nails (not provided) to secure hanger bars to ceiling joists.
4. Install ducting and wiring as described above.
INSTALLATION FROM AREA BELOW CEILING
Note: If you do not have access to the area above the installation location, make
sure that the installation will not interfere with existing wiring, plumbing, etc. and
that the wiring and ducting can be run to the desired location. It will be necessary
to use flexible duct when installing the unit from below.
1. The fan must be mounted between ceiling joists. Decide where you want to
locate the fan, and then determine where the nearest joists are.
Locating Joists – Lightly tap the ceiling. A hollow sound means no joist; a
solid sound means a joist is present. To be sure you have located a joist, drill a
small hole (1/16") and probe into the ceiling with a wire.
2. Locate the joists. Drill a starter hole in the ceiling between the joists.
3. To exactly locate the edge of joist, saw a line from hole to joist.
4. Refer to page 1. Remove power/blower unit from housing.
5. Use the housing pan as a template to mark cutout: place pan centered
between joist and trace around pan.
6. Make cutout along outside of marked line.
7. Refer to Figure 5. Install 2 x 4 cleats to both ceiling joists. In some cases it
may be necessary to use more than a single cleat on one side. The distance
between cleats must be at least 9
1 ⁄
8
" but not more than 10".
8. Remove side wiring knockout and insert and secure an approved box
connector into the wiring entrance hole.
9. Use pliers to bend both mounting tabs as flush as possible to the side of the
housing.
10. Install duct collar.
11. String wiring through box connector and connect 4" flexible duct to duct collar.
12. Carefully push ductwork and wiring back into cutout. Place housing into
cutout.
13. Use wood screws to secure housing to cleats through four holes in housing's
pan. Make sure pan is flush to finished ceiling.
14. Install Power/Blower Unit and complete installation.
FIGURE 5
FIGURE 6
11-1/2"
9-1/8" - 10"
Joist
2"
4"
5-3/4"




4" Flexible
Duct
120vAC
House Wiring
Duct
Collar
Wiring
Knockout
Bend
Mounting
Tabs
Flush To
Side of
Housing
Mounting
Holes

CLEANING AND RELAMPING
1. Pull grille assembly away from ceiling.
2. Squeezing the grille assembly's mounting springs together, remove grille
assembly from housing to expose socket for relamping.
3. Clean grille and lens assembly using a mild soap and water solution.
Assemblies with wood frames should not be immersed.
4. Replace grille assembly flat against ceiling after cleaning or relamping.
Cleat