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Venting requirements
Determine which ducting method is best for your application. Duct system can extend
either through the wall or the roof. Locate the remote blower so that the length of the
duct system and the number of elbows is kept to a minimum to provide efficient
performance. Where possible, remote blower should be centered between wall
studs or roof rafters. The size of the duct system should be uniform.
Do not install two elbows together. Use duct tape to seal all joints in the duct system. Use
caulking to seal remote wall or floor opening around the cap. Flexible duct is not
recommended. It creates back pressure/air turbulence and greatly reduces performance. Make
sure there is proper clearance within the wall or floor for exhaust duct before making cutouts.
Avoid pipes, wires, or other duct systems that may be running through the wall. Do not cut a
joist or stud unless absolutely necessary. If a joist or stud must be cut, then a supporting
frame must be constructed.
Maximum length of ductwork
Duct length is given as a general reference only. For a longer duct run, or smaller duct system,
contact a qualified and trained duct installer. Check with local codes for makeup air
requirements, if any. It is recommended that you use round duct instead of rectangular duct,
especially if elbows are required. If rectangular duct is required, if should be transitioned to 10"
round duct as soon as possible.
For best performance, use no more than three 90° elbows. If more than one elbow is used,
make sure that there is a minimum of 24 inches of straight duct between any two elbows. Do
not install two elbows together. 55 feet for 10" round ductwork - count 90° elbows as 5 feet
and 45° elbows as 3 feet.
NOTE: A very short duct run with remote blowers is NOT RECOMMENDED due to excessive
noise levels. An internal blower may be advisable with our range hoods to keep noise levels
lower.
Preparing for installation
1. Discard any cardboard packaging and foam protection from the blower edges. BEFORE
PROCEEDING, CHECK FOR PHYSICAL DAMAGE TO THE MOTOR AND BLOWER ASSEMBLY,
TO DO SO, REACH IN THROUGH THE INTAKE COLLAR AND SPIN THE FAN BLADES SLOWLY.
THEY SHOULD TURN FREELY AND QUIETLY WITHOUT VIBRATION.
If cosmetic or motor
damage is seen at this point, STOP the installation and contact your dealer.
2. Remove the external blower cover with the outside screws and also the inside wiring box cover.
3. Attach an appropriate UL / CSA strain relief in the electrical knockout. NOTE: for most
installations, it is recommended that the strain relief be installed so that it can be tightened
from inside the remote blower housing.
4. It is advisible to verify operation of the blower and the speed changes before making any
cuts. Make a temporary electrical connection
(see page 16 for electrical connection)
and
connect to your range hood first. See your hood installation manual for connecting the blower
to the hood. Once temporary electrical connections are made, turn on your circuit. If the blower
does not operate properly,
please stop installation and contact your dealer. Once operation is
verified, turn off the circuit and disconnect the wiring from the wiring box.
