NuTone CV350 User manual

Built-In Central Cleaning System
MODEL: CV350, CV353, CV450, CV553
SYSTEM PLANNING AND LAYOUT . . . . . . . . . . . . . . . . . . . . . .2
Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Locating the Power Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Tubing and Wall Inlet Location . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Locating Access Keys in Existing Construction . . . . . . . . . . . . . . .3
INSTALLATION IN NEW CONSTRUCTION . . . . . . . . . . . . . . . .4-8
Wall Inlet Rough-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installing the Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Wall Inlet Installation
Model 360 Wall Inlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Model 330 Wall Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Model CI390 Wall Inlet (Electrified Inlet) . . . . . . . . . . . . . . . . . .7
POWER UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Dimensional Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Tubing Connections at Power Unit . . . . . . . . . . . . . . . . . . . . . . .8
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
INSTALLATION IN EXISTING CONSTRUCTION . . . . . . . . . . .9-10
Wall Inlet Installation
Model 360 Wall Inlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Model 330 Wall Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
FLOOR INLET INSTALLATION . . . . . . . . . . . . . . . . . . . . . . .10-11
FINAL SYSTEM CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
INSTALLATION
INSTRUCTIONS
MODEL CV450 SHOWN

2
SYSTEM PLANNING AND LAYOUT
The NuTone Central Cleaning System consists of a Power Unit,
PVC Tubing and Fittings, Wall Inlets, a flexible Hose and various
cleaning Attachments.
The Power Unit is designed to be wall-mounted away from the
living area of the home and connected to the living area by
means of permanently installed in-wall tubing, fittings and inlets.
Generally, an installation will require 3 to 4 inlets and 16 to 20
feet of tubing per inlet. It is suggested that a floor plan be used to
more accurately determine the quantity of materials needed.
As an aid in planning the installation in either new or existing
construction, look at the following examples. You should be able
to adapt the examples shown to your specific home layout.
Here the power unit is mounted
in the garage. The intake and
exhaust tubing, the only exposed
tubing in the installation, runs up
the garage wall and into the attic.
The trunk line runs horizontally
through the attic from the power
unit to the farthest inlet location.
Branch lines spread throughout the
attic, connecting the trunk line to the
inlet tubing. Each inlet tube is
threaded vertically through an inside wall.
Located in hallways, and in large rooms, the inlets are placed to
provide maximum access to all cleaning areas. See Figure 1.
EXHAUST
TRUNK LINE
BRANCH LINE
INLETS
POWER
UNIT
INTAKE
INLET LINE
VERTICAL
BRANCH
LINE
ATTIC
TRUNK
LINE
INLET
LINE
INLET
EXHAUST
INTAKE
POWER
UNIT
BASEMENT
TRUNK LINE
FIGURE 2
FIGURE 1
Like the two-story house, the split level installation
commonly calls for a two-level trunk line. Here,
the power unit is located in the garage.
The intake tubing runs exposed up the
garage wall and into the ground level
section's attic. Two branch lines
connect this part of the trunk
line to inlet lines which are
dropped inside interior walls. A
vertical branch line runs to the
upstairs attic, where the trunk
line branches into a T-shape.
This trunk line connects to two
upstairs inlet lines and to one
inlet line which drops through
an upstairs wall and down into
the third-level utility room to service
this entire level. See Figure 3.
EXHAUST
POWER
UNIT
INTAKE
TRUNK
LINE
VERTICAL
BRANCH
LINE
BRANCH
LINES
INLET
LINE
INLET
INLET
BRANCH
LINE
THE RANCH STYLE HOUSE
THE TWO-STORY HOUSE
THE SPLIT-LEVEL HOUSE
A double-trunk line system is commonly used in two-story houses.
In the installation shown at left, the power unit is mounted in the
basement. The intake tubing runs up the basement wall and
connects to the main trunk line, which runs along the unfinished
basement ceiling. Two first-floor inlets are connected to the basement
trunk line by vertical inlet lines run through interior walls. In the center
of the house, a vertical branch line runs from the basement trunk line,
through stacked closets, up into the attic. A second trunk line runs across
the attic and two branch lines connect to inlet lines which are dropped
down through upstairs interior walls. See Figure 2.
FIGURE 3

3
• Locate the power unit away from the general living area in an
accessible location for changing the soil bag and periodically
cleaning the secondary filter.
• When planning, remember the power unit is equipped with
an inlet to service a garage, basement, utility room, etc.,
wherever it is located.
• Locate the power unit within six feet of a grounded electrical
outlet. The power unit requires a 120vAC power source.
• Do not locate the power unit close to a source of extreme
heat (i.e., water heater) or in an area with a high ambient
temperature (i.e., attic, furnace room).
• If the power unit is located in a closet or a small utility room,
make sure the area is well-ventilated (i.e., with door louvers).
• Exhausting the power unit to the outside is recommended for
optimal performance but is not required. The exhaust should
not be vented into a wall, a ceiling or a concealed space in
the house. If the exhaust line is vented outside the home,
Model 393 Wall Cap or a roof vent are recommended.
WARNING: Power unit must not be mounted in a high
ambient temperature area such as attic, furnace room, etc.
TUBING AND WALL INLET LOCATIONS
1. Locate inlets on interior walls, choosing central locations
which allow several rooms to be cleaned from a single inlet
using a 30 foot long hose.
2. The tubing installation should consist of a main trunk line
running from the farthest wall inlet to the power unit
location, with branch lines running to each additional inlet.
Keep all tubing lines as straight as possible and use as few
fittings as possible. Beginning at the area farthest from the
power unit, choose a tentative inlet location. Measure 30
feet from the proposed inlet location to the farthest corner of
the rooms to be cleaned by that inlet to determine if inlet
location is proper.
3. If working from blueprints (or building plans drawn at
1⁄4" = 1 ft. scale), use a 71⁄2" chain as your guide to
determine inlet locations.
4. Move tentative inlet location if necessary. Use the same
procedure to determine each additional inlet location,
always working toward the power unit.
5. Be sure tubing will not interfere with electrical, plumbing or
other mechanical installations.
6. Locate inlets within six feet of an electrical receptacle to
allow use of optional current-carrying hose.
7. Be sure inlets will not be blocked by doors or furniture.
LOCATING THE POWER UNIT
Built-In Appliances. You will often
find a hollow space behind built-in
kitchen appliances. If this space lines
up with an obstruction-free interior wall
above or a closet, this might be a key
to your installation. See Figure 5.
You may also want to consider
running exposed tubing through
cabinets or cupboards.
Cold-Air Return. A cold-air
return often provides a straight
run from basement to other levels
of the house. See Figure 6.
The ductwork is easily cut for
access. Seal around the tube
when completing the installation.
FIGURE 5
FIGURE 6
LOCATING ACCESS KEYS IN
EXISTING CONSTRUCTION
Let's say, for example, you have a two-story house and you want
to locate the power unit in the basement. If you can't find interior
walls on both the first and second floors which line up and are free
from obstacles. How do you get from the basement to the attic?
Unless your home is a ranch-style house where a single trunk
line can run directly through the attic or basement, you should first
investigate your house to find the key to running your tubing from
level to level. Look for an accessible area free from obstructions
that will accommodate the 2" tubing.
If you understand how your existing home is constructed, it can
be relatively easy to find access routes to run the tubing. Refer
again to the illustration on page 2 as you consider your home
construction.
Some of the keys you might find in your home are illustrated here.
FIGURE 4
Stacked Closets or Laundry
Chute. Many homes will have
an upstairs closet located
directly above a downstairs
closet. It is easy to run the
tubing from one floor level to
another inside these stacked
closets. In these installations
the tubing is often left exposed
inside the closets. See Figure
4. A laundry chute could also
provide access from basement
to upper floors.
TUBING

4
INSTALLATION IN NEW CONSTRUCTION
Once the locations for wall inlets have been determined, mount
all inlet brackets.
1. Choose the appropriate mounting bracket for the inlet being
installed. (See chart.)
2. To locate bracket on wall stud, measure approximately 18" up
from finished floor level. (Height may vary according to
individual preference.)
MODEL 361 (FOR USE WITH 360 INLETS)
3. Refer to Figure 7. Nail bracket to side of stud so that front
edge of bracket is flush to front of stud. (The bracket may also
be nailed to the front edge of the stud. See face mounting
illustrated. For face mounting, use locating tabs on bracket for
proper alignment.)
4. Refer to Figure 8. Remove cardboard from plaster guard
frame. Using four (4) provided screws, attach the appropriate
flanged fitting and inlet seal to back of inlet.
5. Replace cardboard in plaster guard frame.
MODEL 329 (FOR USE WITH 330 INLETS)
6. When using Model 329, glue elbow to mounting plate. Attach
to stud as shown in Figure 9.
MODEL 329 SIDE
MOUNTING
FACE
MOUNTING
MODEL 361
23/8"113/16"
FIGURE 7
FIGURE 8
WALL INLET ROUGH-IN
FIGURE 9
NuTone Inlet Rough-in
330 Series 329
360 Series 361
CI390 Series Electrified Inlet CI390RK
MODEL 329

5
INSTALLATION IN NEW CONSTRUCTION (continued)
Use the following installation guidelines when installing tubing.
1. Start tubing installation at farthest inlet and work toward the
power unit.
2. Tubing run to the power unit should be as straight as
possible.
3. When assembling sections with elbows and tees, make
sure the curve in the fitting is aligned so that the air flows
toward the power unit.
4. Branch lines should always join the trunk line from above or
from the same level. Never join a branch line from an angle
below the trunk line.
5. Refer to Figure 28 on page 8. Run low voltage wiring
(Model 376-UL) and secure wiring to tubing as tubing is
installed. Model CF-380 Pipe Support can be used to
support long runs of tubing (position near joists) and to clip
wire along tubing. Secure tubing to joists or studs. Leave
approximately 6" of wire for connection to each inlet.
6. Cut a 21⁄2" diameter hole in sole plate, header or stud
directly in line with opening of inlet bracket fitting.
7. Refer to Figure 11. Measure length of tubing needed to
connect inlet to trunk line. Allow approximately 3⁄4" of tubing
for inserting into fittings.
8. Refer to Figure 12. Cut tubing, keeping cut square.
9. Refer to Figure 13. Remove burrs from both inside and
outside of tubing.
10. Before cementing, pre-assemble section to inlet fitting,
check for proper length.
11. Refer to Figure 14. Apply PVC cement (Model 379) to
outside of tubing. Coat tubing approximately 1" back. Take
care to keep cement from inside of tube.
12. Refer to Figure 15. Insert tubing into fitting with a twisting
motion to evenly spread cement. Be sure tubing is firmly
seated in fitting.
13. If fittings have been attached to tubing at the end opposite
the inlet bracket, be sure alignment is proper before
cement sets.
14. Refer to Figure 16. Tape wire to tubing to hold in place
and insert through hole in inlet bracket.
15. Connect each inlet line and branch line into main trunk line.
Complete low voltage wiring as main trunk line is continued
back to power unit.
INSTALLING THE TUBING
SIDE
MOUNTING FACE
MOUNTING
MODEL 361 MOUNTING
21/2" DIA. HOLE
THROUGH SOLE PLATE
23/8"113/16"
MODEL 329 MOUNTING
2"
FACE
MOUNTING
113/16"
113/16"
21/2" DIA. HOLE
THROUGH SOLE PLATE
113/16"
FIGURE 10
FIGURE 11
INCLUDE FITTING
RECESS IN
MEASUREMENT
TUBING MEASUREMENT
PVC TUBING
FITTING FITTING
3/4"
3/4"
FIGURE 12 FIGURE 13
FIGURE 14 FIGURE 15 FIGURE 16
2" - 382S
25⁄8" - 382
Caution: When tubing is run
through the wall stud, sole plate,
headers - or anywhere that
building materials will be
attached - place a nail plate
(Model 378) over that area
(on both sides if necessary)
to prevent nails from piercing
tubing.