Whirlpool RH3736XLQ3 Istruzioni per l'installazione e manuale d'uso e manutenzione - Pagina 5

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Vent system must terminate to the outdoors, except for non-
vented (recirculating) installations.
Do not terminate the vent system in an attic or other enclosed
area.
Do not used a 4" (10.2 cm) laundry-type wall cap.
Use a 7" (17.8 cm) or a 3 " x 10" (8.3 x 25.4 cm) round metal
vent. Rigid metal vent is recommended. Plastic or metal foil
vent is not recommended.
The length of vent system and number of elbows should be
kept to a minimum to provide efficient performance.
For the most efficient and quiet operation:
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 1 elbow is used.
Do not install 2 elbows together.
Use clamps to seal all joints in the vent system.
The vent system must have a damper. If roof or wall cap has a
damper, do not use damper supplied with the range hood.
Use caulking to seal exterior wall or roof opening around the
cap.
Cold Weather Installations
An additional back draft damper should be installed to minimize
backward cold air flow 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 make up air systems
when using ventilation systems greater than specified CFM of air
movement. The specified CFM varies from locale to locale.
Consult your HVAC professional for specific requirements in your
area.
Venting Methods
Vent system can terminate either through the roof or wall. Use
3 " x 10" (8.3 x 25.4 cm) with a maximum vent length of
35 ft (10.7 m) or 7" (17.8 cm) round vent with a maximum length
of 50 ft (15.2 m) for vent system.
NOTE: Flexible vent is not recommended. Flexible vent creates
back pressure and air turbulence that gently reduces
performance.
Venting Requirements
(Vented Models Only)
Roof Venting
A
D
B
C
A. 7" (17.8 cm) round vent or a
3 " x 10" (8.3 x 25.4 cm) vent
through roof
B. Round vent: use 7" (17.8 cm)
round damper
(purchased separately)
C. 18" (45.7 cm) - 24" (61.0 cm)
above cooking surface
D. Roof cap
Calculating Vent System Length
To calculate the length of the system you need, add the
equivalent feet (meters) for each vent piece used in the system.
7" (17.8 cm) Vent System
Vent Piece
45° elbow
90° elbow
7" (17.8 cm)
wall cap
3 " x 10" (8.3 cm x 25.4 cm)
to 7" (17.8 cm)
3 " x 10" (8.3 cm x 25.4 cm)
to 7" (17.8 cm) 90° elbow
Wall Venting
A
B
D
C
A. 7" (17.8 cm) round vent or a
3 " x 10" (8.3 x 25.4 cm) vent
through the wall
B. 3 " x 10" (8.3 x 25.4 cm)
through the wall
C. 18" (45.7 cm) - 24" (61.0 cm)
above cooking surface
D. Wall cap
7" (17.8 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)
5.0 ft
(1.5 m)
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