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PRODUCT MODEL NUMBERS
KHMC1857W
KHMC1857XS
Electrical: A 120-Volt, 60-Hz, AC-only, 15- or 20-amp fused electrical
supply with a fuse or circuit breaker. A time-delay fuse or time-delay circuit
breaker is recommended. It is recommended that a separate circuit serving
only this microwave oven be provided.
VENTING REQUIREMENTS
A 3 " x 10" (8.3 x 25.4 cm) rectangular or 6" (15.2 cm) round vent should be used.
The total length of the vent system including straight vent, elbow(s), transitions and wall
or roof caps must not exceed the equivalent of 140 ft (42.7 m) for either type of vent.
For best performance, use no more than three 90° elbows.
To calculate the length of the system you need, add the equivalent length for each vent
piece used in the system. See the following examples:
A
B
D
E
A. Rectangular to round transition piece: 3 " x 10" to 6" = 5 ft
(8.3 x 25.4 cm to 15.2 cm = 1.5 m)
B. Roof cap: 3 " x 10" = 24 ft (8.3 x 25.4 cm = 7.3 m)
C. 90° elbow: 3 " x 10" = 25 ft (8.3 x 25.4 cm = 7.6 m)
D. 90° elbow: 6" = 10 ft (15.2 cm = 3 m)
E. Wall cap: 3 " x 10" = 40 ft (8.3 x 25.4 cm = 12.2 m)
F. 45° elbow: 6" = 5 ft (15.2 cm = 1.5 m)
G. 90° flat elbow: 3 " x 10" = 10 ft (8.3 x 25.4 cm = 3 m)
6" (15.2 cm) vent system = 73 ft (22.2 m) total
A
6 ft (1.8 m)
2 ft
A. Two 90° elbows = 20 ft (6.1 m)
(0.6 m)
B. 1 wall cap = 40 ft (12.2 m)
C. 1 rectangular to round transition
D. 2 ft (0.6 m) + 6 ft (1.8 m)
C
D
3 " x 10" (8.3 x 25.4 cm) vent system = 73 ft (22.2 m) total
A
6 ft (1.8 m)
2 ft
(0.6 m)
C
A. One 3 " x 10" (8.3 x 25.4 cm) 90° elbow = 25 ft (7.6 m)
B. 1 wall cap = 40 ft (12.2 m)
C. 2 ft (0.6 m) + 6 ft (1.8 m) straight = 8 ft (2.4 m)
Because Whirlpool Corporation policy includes a continuous commitment to improve
our products, we reserve the right to change materials and specifications without notice.
Microwave Hood Combination
KHMS2040W
C
F
G
B
piece = 5 ft (1.5 m)
straight = 8 ft (2.4 m)
B
PRODUCT DIMENSIONS
CABINET OPENING DIMENSIONS
The grounded 3-prong outlet must be inside the upper cabinet.
66" (167.6 cm) min.
*30" (76.2 cm) is typical for 66" (167.6 cm) installation height.
Exact dimensions may vary depending on type of range/cooktop below.
Rectangular to Round Transition for Roof Venting
NOTE: The minimum 3" (7.6 cm) clearance must exist between
the top of the microwave oven and the rectangular to round
transition piece so that the damper can open freely and fully.
A
B
C
3" (7.6 cm)
Dimensions are for planning purposes only. For complete details, see Installation
Instructions packed with product. Specifications subject to change without notice.
A
B
12" (30.5 cm) min.
14" (35.6 cm) max.
upper cabinet and
30"
side cabinet depth
(76.2 cm)
min.
30"
(76.2 cm)
typical*
A. 2" x 4" wall stud
B. Grounded 3-prong outlet
D
A. Roof cap
B. 6" (15.2 cm) min. diameter round vent
C. Elbow (for wall venting only)
E
D. Wall cap
E. 3 " x 10" to 6" (8.3 x 25.4 cm to 15.2 cm)
F
rectangular to round transition piece
F. Vent extension piece, at least 3" (7.6 cm) high
Ref. W10247296B
9/30/10
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