Calculating Vent System Length; Electrical Requirements - Jenn-Air 30"GAS DOWNDRAFT SLIDE-IN Installation Instructions Manual

Calculating Vent System Length

IMPORTANT: This range is rated at 60 ft (18.3 m) of straight duct.
Low range is up to 30 ft (9.1 m); high range is 31 ft (9.4 m) to
60 ft (18.3 m).
If equivalent duct length exceeds 30 ft (18.3 m), the blower must
be converted to high range.
Do not convert to high range for shorter lengths. This will
cause excessive noise, conditioned air loss and affect the
flame pattern on gas ranges.
To convert blower for high range installations, see the
"Install Downdraft System" section.
To calculate the length of the system you need, add the
equivalent feet (meters) for each vent piece used in the system.
Vent Piece
45° elbow
90° elbow
6" (15.2 cm)
wall cap
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) transition
6" (15.2 cm) to 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) transition
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) 90° elbow
transition
6" (15.2 cm) to 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) 90° elbow
transition
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
90° elbow
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
flat elbow
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
wall cap
8
6" (15.2 cm) Round
2.5 ft
(0.8 m)
5.0 ft
(1.5 m)
0.0 ft
(0.0 m)
4.5 ft
(1.4 m)
1 ft
(0.3 m)
5.0 ft
(1.5 m)
5.0 ft
(1.5 m)
5.0 ft
(1.5 m)
12.0 ft
(3.7 m)
0.0 ft
(0.0 m)
Example vent system
90˚ elbow
2 ft
(0.6 m)
Maximum length = 60 ft (18.3 m)
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: For external venting, flexible vent is not recommended.
Flexible vent creates back pressure and air turbulence that
greatly reduce performance.

Electrical Requirements

IMPORTANT: The range must be electrically grounded in
accordance with local codes and ordinances, or in the absence
of local codes, with the National Electrical Code, ANSI/NFPA 70
or Canadian Electrical Code, CSA C22.1.
If codes permit and a separate ground wire is used, it is
recommended that a qualified electrical installer determine that
the ground path is adequate.
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
A 120 volt, 60 Hz., AC only, 15-amp fused, electrical circuit is
required. A time-delay fuse or circuit breaker is also
recommended. It is recommended that a separate circuit
serving only this range be provided.
Electronic ignition systems operate within wide voltage limits,
but proper grounding and polarity are necessary. Check that
the outlet provides 120-volt power and is correctly grounded.
The wiring diagram is located on the back of the access
panel in a clear plastic bag.
wall cap
6 ft (1.8 m)