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8
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 qualied 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 V, 60 Hz, AC-only, 15 A, fused electrical
circuit is required.
■ If the house has aluminum wiring, follow the procedure
below:
1. Connect the aluminum wiring using special connectors
and/or tools designed and UL listed for joining copper to
aluminum.
2. Follow the electrical connector manufacturer's
recommended procedure. Aluminum/copper connection
must conform with local codes and industry accepted
wiring practices.
■ Wire sizes and connections must conform with the rating of
the appliance as specied on the model/serial/rating plate.
The model/serial/rating plate is located on the front of the
downdraft vent above the wiring box cover.
■ 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.
Venting Requirements
IMPORTANT: Make sure there is proper clearance within the wall
or oor before making exhaust vent cutouts.
■ Use heavy (rigid) metal vent.
■ Venting system must terminate to the outside.
■ Do not terminate the vent system in an attic or other
enclosed area.
■ Do not use 4" (10.2 cm) laundry-type wall caps.
■ Do not install 2 elbows together.
■ Do not use plastic or metal foil vent.
■ The length of vent system and number of elbows should
be kept to a minimum to provide efcient performance.
■ Use no more than three 90° elbows.
■ Make sure there is a minimum of 24" (61 cm) of straight vent
between the elbows if more than one elbow is used.
■ Use clamps or duct tape to seal all joints in the vent system.
■ Use caulking tape to seal the exterior wall or oor opening
around cap.
■ Do not cut joist or stud. If vent cutout falls over a joist
or stud, a supporting frame must be constructed.
Flexible metal vent is not recommended. If it is used, calculate
each foot of exible vent as 2 ft (0.6 m) of rigid metal vent.
Flexible elbows count twice as much as standard elbows.
Recommended vent system length:
For either interior-mounted or exterior-mounted blower
installations, the vent system length should not exceed the
maximum lengths listed in the “Maximum Length of Vent
System” chart. See “Calculating Vent System Length” in the
“Venting Methods” section in the Installation Instructions.
Cold Weather Installations
An additional backdraft damper should be installed to minimize
backward cold airow and a thermal break should be installed
to minimize conduction of outside temperatures as part of the
vent system. The damper should be on the cold air side of the
thermal break.
The break should be as close as possible to where the vent
system enters the heated portion of the house.
Makeup Air
Local building codes may require the use of makeup air systems
when using ventilation systems greater than specied CFM of
air movement. The specied CFM varies from locale to locale.
Consult your HVAC professional for specic requirements in
your area.
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