5

Planning the Installation

Planning the Makeup Air Switch Duct installation
This makeup air kit can only be used with vented range hoods.
The makeup air kit must match the vent transition size for your
range hood.
Planning the Motorized Damper installation
Planning the installation first requires selecting the most
appropriate installation approach. The following illustrations offer
suggestions for the most effective installation approach by
considering a few important factors.

Typical Installations

Installations will vary according to the location in the home where
the motorized damper is installed and which makeup air kit is
used. The following illustrations can be used as a reference guide
for your installation. Always comply with all governing codes and
ordinances.
NOTE: The 10" (25.4 cm) round Makeup Air Kit must be installed
with 2 independent incoming air supply ducts. Use the
2 motorized dampers supplied with the kit (1 each, in the
incoming fresh air supply ducts).
Motorized Damper Connected to Return Side of Central Duct
System
Motorized Damper and Outside Air Connected Directly to a
Ceiling, Floor or Wall Register
Electrical Requirements
Observe all governing codes and ordinances.
Ensure that the electrical installation is adequate and in
conformance with National Electrical Code, ANSI/NFPA 70 (latest
edition), or CSA Standards C22.1-94, Canadian Electrical Code,
Part 1 and C22.2 No. 0-M91 (latest edition) and all local codes
and ordinances.
If codes permit and a separate ground wire is used, it is
recommended that a qualified electrician determine that the
ground path is adequate.
A copy of the above code standards can be obtained from:
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02169-7471
CSA International
8501 East Pleasant Valley Road
Cleveland, OH 44131-5575
■A 120 volt, 60 Hz., AC only, 15-amp, fused electrical circuit is
required.
■If the house has aluminum wiring, follow the procedure
below:
1. Connect a section of solid copper wire to the pigtail
leads.
2. Connect the aluminum wiring to the added section of
copper wire using special connectors and/or tools
designed and UL listed for joining copper to aluminum.
Follow the electrical connector manufacturer's recommended
procedure. Aluminum/copper connection must conform with
local codes and industry accepted wiring practices.
■Wire sizes must conform to the requirements of the National
Electrical Code, ANSI/NFPA 70 (latest edition), or CSA
Standards C22. 1-94, Canadian Electrical Code, Part 1 and
C22.2 No. 0-M91 (latest edition) and all local codes and
ordinances.
■A UL or CSA listed strain relief must be provided at each end
of the power supply cable/conduit (at the junction boxes).
A.Range hood
B.Vent transition
C.Makeup air switch duct
D.Range hood exhaust
E.HVAC system
F.Return air central system
G.Motori zed damper
H.Wall or roof
I.Wall/roof cap
J.Outside air
A
B
C
E

FG

H

I

D

J

A.Range hood
B.Vent transition
C.Makeup air switch duct
D.Range hood exhaust
E.Motorized damper
F.Wall or roof
G.Wall/roof ca p
H.Outside air
A
B
C
E
F

G

D

H