Doc150313-01
Installation and maintenance manual
www.cadexair.com
7
1010, Boulevard Lionel Boulet
1-800-461-0668
Varennes, Québec, Canada J3X 1P7
Filters installation and Geo-Vary grease extractor
adjustment
Before starting the exhaust hood, install filters starting
with inserting the top of the filter first in the top slot then
lay down the base of the filters in the bottom slot where
grease will be collected.
Geo-Vary grease extractor has a pre-determined
setting as well as an adjustment level. The Geo-Vary
identification must always be in front. Perform the
adjustment according to the label in each exhaust
hood. Refer to Annex 3.
Air flow balancing
Exhaust hood with baffle filters CAS series
Start the exhaust fan and validate the rotation direction
before starting the air balancing and make sure all
filters are installed in the exhaust hood. Have in hand
the specified air flow requirement for the good
functioning of the exhaust hood.
Cadexair recommends the following method with
measurements read with a propeller anemometer with
a 2.75 inch wheel (70 mm).
Perform 5 speed readings in the filters slot according
to the image below. Readings must be performed
perpendicularly to the filters at an approximate
distance of 2 inch (50 mm). Evaluate the average
speed by filters adding the 5 speed values then divided
by 5.
Then, multiply the average speed value by an effective
area factor according to the filters size (refer to table
below).
Size
Effective Area
H x W (in) SQ.FT
SQ M
16 x 16
1,36
0,126
16 x 20
1,75
0,163
16 x 25
2,24
0,208
20 x 16
1,75
0,163
20 x 20
2,25
0,209
20 x 25
2,88
0,268
For Imperial calculations, use air flow speed units in
feet per minute and use the effective area in square
foots (SQ.FT) to get an air flow in cubic foot per minute
(CFM).
For Metric calculations, use air slow speed units in
meters per hour and use the effective area in square
meters (SQ.M) to get an air flow in cubic meter per
hour. To convert a cubic meter per hour air flow into
liters per seconds, multiply the value by 0.278.
Exhaust hood with Geo-Vary grease extractors
CAM series
Before proceeding to balancing, make sure that the
filters are installed in the exhaust hood and adjusted
as indicated on the label inside the exhaust hood
(Refer to Annex 3).
Start the exhaust fan and validate the rotation direction
before starting the air balancing. Have in hand the
specified air flow requirement for the good functioning
of the exhaust hood.
Cadexair recommends the following method with
measurements read with a propeller anemometer with
a 2.75 inch wheel (70 mm).
Perform 3 speed readings in the filters slot according
to the image below. Readings must be performed
perpendicularly to the filters top opening at an
approximate distance of 2 inch (50 mm). Evaluate the
