Dacor DHD30M967, Руководство по установке

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Installation Instruction s
Planning the Ductwork, cont.
Ductwork Equivalent Lengths
For each new elbow and transition, you must subtract “equivalent lengths” from your total
maximum duct run length to compensate for wind resistance.
Piece Subtract
8” 90° Elbow 7 feet
8” 45° Elbow 3 feet
10” 90° Elbow 5 feet
10” 45° Elbow 2 feet
3” x 10” to Round 90° Transition
25 feet
3 1/4” x 10” to 8”/10” Round Transition
4 feet
Wall Cap w/Damper
Roof Cap
Equivalent lengths of roof and wall caps
vary with model and configuration.
Ductwork Tips
•
Try to minimize transitions/turns/sharp angles (e.g., two staggered 45° angles are better than
one sharp 90° angle).
•
Keep turns as far from the hood exhaust as possible with as much space between bends as
possible.
•
U se round instead of rectangular ducting, especially when elbows are needed.
•
If multiple elbows are used, try to keep at least 24 in. of straight duct between each elbow.
•
Avoid using “S” or back-to-back adjacent elbows.
•
In extremely cold-weather regions, use thermal breaks (i.e., short sections of non-metallic duct)
to avoid indoor heat loss. Put the break as close to the outside pass-through point as possible.
•
Do not use flexible metal ducting, or ductwork smaller than what the tables advise.
•
The hood exhaust connects to an 8” round duct. You can increase the duct size over the duct run.
•
To prevent backdraft, never decrease the duct size over the run. If existing ductwork is under 8 "
in diameter, replace it with 8” ductwork.
•
Join ducting with sheet-metal screws, then seal with certified duct/foil tape. Never join ducting
with tape only.
•
Support the weight of the ducting with sheet-metal screws as needed.
•
To avoid backdraft, a damper at the duct outlet may be required.
WARNING
•
Electricity to the range hood should be installed only by a licensed electrician.
•
Observe all local codes during installation. Con sul t the local building department as needed .
•
A nchor the hood to the wall as instructed to avoid an injury hazard .
•
To avoid electric-shock and property damage, do not drill/cut near in-wall plumbing and wiring.
•
Use the temporary support brackets only until the hood is permanently anchored.