Jenn-Air CVEX4270B20 Installation Instructions Manual page 7

Example vent system
90 ° embow
6 ft (1.8 rn)
(
wall cap
1- 90 ° elbow = 5 ft (1.5 m)
8 ft (2.4 m) straight = 8 ft (2.4 m)
1 - wall cap = 0 ft (0 m)
System length = 13 ft (3.9 m)
NOTE: Flexible vent is not recommended. Flexible vent creates
back pressure and air turbulence that greatly reduce
performance.
Determine Range Blower Setting
This cooktop is equipped with a dual range blower. It is shipped
from the factory in the low range for most installations. If the
equivalent duct length exceeds 30 ft (9.1 m), it must be converted
to high range. Do not convert the blower to high range for shorter
lengths; this will cause excessive noise and conditioned air loss.
Convert blower before installing into countertop if necessary.
Excessive Weight Hazard
Use two or more people to move and install cooktop.
Failure to do so can result in back or other injury.
To Convert to High Range:
1. Using 2 or more people, place cooktop on floor with front
edge and plenum down.
2. Remove the four acorn nuts (A) that attach the blower motor
assembly to the blower exhaust scroll.
3. Remove the blower motor assembly (B) from the blower
exhaust scroll (E).
4. Slowly reach in the blower exhaust scroll opening and
remove the snap ring (C).
5. Gently remove the restrictor ring (D).
6. Place the motor assembly back on the studs of the blower
exhaust scroll.
7. Reattach the four acorn nuts to secure the blower motor
assembly back to the blower exhaust scroll.
A. Acorn nuts (4)
B. Blower motor assembly
C. Snap ring
D. Restrictor ring
E. Blower exhaust scroll
Electrical Shock Hazard
Disconnect power before servicing.
Use 8 gauge copper wire.
Electrically ground cooktop.
Failure to follow these instructions can result in death,
fire, or electrical shock.
If codes permit and a separate ground wire is used, it is
recommended that a qualified electrical installer determine that
the ground path and wire gauge are in accordance with local
codes.
Check with a qualified electrical installer if you are not sure the
cooktop is properly grounded.
Make sure that the electrical connection and wire size are
adequate and in conformance with the National Electrical Code,
ANSI/NFPA 70-latest edition or CSA Standards C22.1-94,
Canadian Electrical Code, Part 1 and C22.2 No. O-M91-1atest
edition, and all local codes and ordinances.
A copy of the above code standards can be obtained from:
National Fire Protection Association
One Batterymarch Park
Quincy, MA 02269
CSA International
8501 East Pleasant Valley Road
Cleveland, OH 44131-5575