Cosmo DVRD1408 Owner Manual
Installation Guide & Users
Manual
IMPORTANT: Read and save these instructions.
NOTICE:
Installer: Leave this guide with the homeowner
Homeowner: Keep this guide for future reference
Under Cabinet
Range Hood
¤¨¤ªRange Hood
QB series
This product is designed for indoor residential use only.
INSTALLATION
Tools Needed .............................3
Parts Supplied ............................4
Venting Requirements .....................5
Mount Heights & Clearance .........5-6
Calculating Vent System Length .....6
Venting Methods .............................7
Electrical Requirements ...................8
Preparation .......................................9
Installation ................................10-11
Range Hood Operations .................12
USE & CARE
Troubleshooting ..................................13
Use & Care Information .....................14
Measurements & Diagrams ...........15-20
MAINTENANCE
Cleaning ..............................................21
Replacing the Filter ............................21
Replacing the Light Bulb ....................21
WARRANTY & SERVICE
Warranty .............................................22
Contact Us ..........................................23
Venting Requirements
Vent system must terminate to the outside •
(roof or side wall).
DO NOT terminate the vent system in an at-•
tic or other enclosed area.
DO NOT use 4” (10.2 cm) laundry-type wall •
caps.
Use metal/aluminum vent only. Rigid metal/•
aluminum vent is recommended.
DO NOT use plastic vent.•
Always keep the duct clean to ensure proper •
airflow.
Calculate the following figures before instal-•
lation:
Distance from the floor to the ceiling.1.
Distance between the floor to the coun-2.
tertop/stove (recommend* 27” to 30”).
Distance between the countertop/stove 3.
to the range hood.
Height of hood and duct cover.4.
For the most efficient & quiet operation:
A distance of 27” to 30” is recommended* •
between stove top and the bottom of range
hood.
It is recommended that the range hood be •
vented vertically through the roof through 8”
(17.8 cm) or bigger round metal/aluminum
vent work.
The size of the vent should be uniform.•
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 one elbow is used.
DO NOT install two elbows together.•
The length of vent system and number of •
elbows should be kept to a minimum to provide efficient performance.
The vent system must have a damper. If •
roof or wall cap has a damper, DO NOT
use damper (if supplied) on top of the range
hood.
Use silver tape or duct tape to seal all joints •
in the vent system.
Use caulking to seal exterior wall or roof •
opening around the cap.
Ceiling
Height
Cabinet
Height
Range
Hood
Height
Min:
27”
Max: 30”
36”
Counter
Top
Height & Clearance
Cabinet or Single-
piece Chimney
(Optional)
Under Cabinet
Range hood
Countertop/Stove
IMPORTANT:
A minimum of 8” round (standard for this range hood) or 3-1/4 x 10” rectangular duct (purchased separate-•
ly) must be used to maintain maximum airflow efficiency.
Always use rigid type metal/aluminum ducts if available to maximize airflow when connecting to provided •
duct.
Please use • Duct Run Calculation below to compute total available duct run when using elbows, transitions
and caps.
ALWAYS, when possible, reduce the number or transitions and turns. If long duct run is required, increase •
duct size from 8” to 9” or 10”. If a reducer is used, install a long reducer instead of a pancake reducer. Reducing duct size will restrict airflow and decrease airflow, thus reduce duct size as far away from opening as
possible.
If turns or transitions are required: Install as far away from opening and as far apart, between 2, as possible.•
Minimum mount height between stove top to hood bottom should be no less than 27-inch*.•
Maximum mount height between stove top to hood bottom should be no higher than 30-inch*.•
It is important to install the hood at the proper mounting height. Hoods mounted too low could result in heat •
damage and fire hazard; while hoods mounted too high will be hard to reach and will loose its performance
and efficiency.
If available, also refer to stove top manufacturer’s height clearance requirements and recommended hood •
mounting height above range.
* Due to different ceiling height configurations, recommended height may not be applicable.
Minimum Duct Size:
Round - 8” minimum•
Rectangular - 3-1/4 x 10” minimum (requires a 8” to 3-1/4x10” adaptor, not supplied)•
Calculating Vent System Length
To calculate the length of the system you need, deduct the equivalent feet for each vent piece used in the system
from the recommended maximum duct run.
Duct Run Calculation:
Recommended maximum run
8” or 3-1/4 x 10” duct 50 ft
Vent piece deduction
Each 90º elbow used 9 ft
Each 45º elbow used 5 ft
Each 8” to 3/14 x 10” transition used 7 ft
Side wall cap with damper 0 ft
Roof cap 0 ft
Duct Run Calcuation example:
One roof cap, two 90º elbow, and one 45º elbow used:
0ft + 9ft + 9ft + 5ft = 23ft used.
Deduct 23ft from 50ft, 27ft maximum available for
straight duct run.
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