4
Duct Cleaning *
1.
Before using the COBRA-5 to clean the air system, the supply and return duct diffuser grills
must be removed. Also, pre-vacuum and plug these openings, and then attach the Turbojet or
other negative air machine to the system.
2.
CAUTION: DO NOT INSERT OR REMOVE THE BRUSH FROM THE DUCT WHILE
THE BRUSH IS TURNING
3.
Begin at the duct opening farthest from the furnace/air conditioner.
4.
With the Brush STOPPED, insert the brush and cable assembly one or two feet into the duct
to be cleaned. THE MACHINE END OF THE CABLE MUST BE STRAIGHT FOR AT
LEAST 4 to 5 FEET TO REDUCE THE FRICTION and HEATING OF THE CABLE
HOUSING. A tight bend in the cable will cause friction that will damage the cable housing
and cable resulting in costly repairs or replacement of the cable.
5.
Start the brush by turning on the main power, set the speed dial to 30 or 40, and then flip the
remote switch to “Forward”. The brush will begin to rotate within a few seconds.
NOTE: The brush will begin to turn slowly at 10 to 20 on the Dial. Most duct cleaning
will be done between 30 and 60 on the scale (200 to 900 RPM).
6.
Push the Flex-E-Bristle Brush into the duct with a smooth gentle force. The brush will
expand and compress to clean any size duct from 4” to 18” high and any width.
CAUTION: To clean duct board ducts, or older flex duct systems, the COBRA-5 Brush
system should be used at a low speed with caution as its aggressive cleaning action may
damage these delicate ducts. Internally insulated ducts, brittle flex ducts and fraying duct
board ducts should NOT be cleaned with a power brush.
(See Forward and Reverse Air Whisk and Sidewinder, on www.air-care.com)
7.
When the end of the duct is reached, the cable can be pulled slowly back toward the opening.
If the duct is rectangular in shape, stop the COBRA-5 with the remote switch, then run it in
the Reverse direction as you pull it back to the duct opening. This will assure that the brush
cleans both sides of the rectangular duct.
8.
Stop the brush 1 or 2 feet from the duct entrance then remove the brush. This duct opening
can now be plugged with the foam plug, and the next duct opening cleaned in the same
manner. Repeat this on each duct opening until all have been cleaned.
9.
The duct system is now ready to be decontaminated by fogging in a duct sealant like Soot Set
and an EPA registered sanitizer such as Envirocon.
* For a complete Duct Cleaning Procedure Summary refer to the back of this manual. Air-Care also has classroom
and self-study training programs available. Please visit our website at
www.air-care.com
or call 800-322-9919 for a
free catalog.
